JP4463615B2 - Three-dimensional object display program and information processing apparatus - Google Patents

Description

  The present invention relates to a three-dimensional object display program, and more specifically to a three-dimensional object display program that creates and displays a three-dimensional object obtained by deforming a solid in an initial state.

Conventionally, various methods for creating a three-dimensional solid object have been proposed. For example, an image processing method (prior art) in which a horizontal plane is divided by grid points arranged at regular intervals, polygons that match the heights of the grid points are generated, and polygons having unevenness are generated by connecting the polygons. 1) has been proposed.
Japanese Patent No. 3436748 (FIG. 2)

  Here, for example, consider a case where an operation of cutting a rotating object (for example, an object simulating a log) with a drill is expressed on a computer. In this case, when the prior art 1 is applied, it can be considered that the polygon model is deformed by changing the radius from the central axis of the cylindrical polygon model. That is, the above operation is expressed by setting the polygon model lattice points so that the direction from the central axis to the radius is the height direction. Specifically, a process for rotating a polygon model imitating a log and a process for reducing the height of the lattice point at the position where the drill hits to express the position as if it was cut. Can do.

  However, performing a process for determining whether or not a drill is in contact with a polygon model while rotating the polygon model and a process for calculating the height are burdens on the computer that performs these processes. In particular, it is considered that such processing is actually impossible in a portable information terminal or game device that does not have high processing capability.

  Therefore, an object of the present invention is to provide a three-dimensional object display program capable of expressing an operation of deforming a rotating solid with simpler processing and an information processing apparatus that executes the program.

The present invention employs the following configuration in order to solve the above problems. In addition, reference numerals in parentheses and supplementary explanations in this column show correspondence with embodiments described later in order to help understanding of the present invention, and do not limit the present invention.
That is, the first invention is a three-dimensional object display program for causing a computer to display a three-dimensional object (35, 50, 52) obtained by deforming a solid in an initial state on a display device (first LCD 11). Here, the solid in the initial state is a solid obtained by rotating a predetermined plane about the central axis. The three-dimensional object display program includes a graphic display step (S12 (abbreviation of step 12; the same applies hereinafter)), a pattern display step (S26), a designated position determination step (S20), and a graphic deformation step (S22 to S25). The object display step (S40, S41) is executed by the computer. In the graphic display step, a deformation graphic (30) representing at least a part of the external graphic when the solid in the initial state is viewed from a direction perpendicular to the central axis (42) is displayed on the display device. In the pattern display step, the pattern of the deformation graphic is scrolled in a direction perpendicular to the central axis and displayed on the display device. The designated position determining step determines an arbitrary position on the screen of the display device as the designated position in accordance with an operation by the user. In the graphic transformation step, the contour of the graphic for transformation at a portion intersecting with a straight line including a perpendicular line extending from the designated position to the central axis is transformed and displayed according to the designated position. In the object display step, a three-dimensional object obtained by rotating the outer shape around the central axis is created using the deformation graphic deformed in the graphic deformation step and displayed on the display device.

  In the second invention, the deformation graphic display step may create the deformation graphic with a polygon in a virtual three-dimensional space. At this time, in the pattern display step, the texture (45, 51) representing the pattern of the deformation graphic is scrolled in the direction perpendicular to the central axis and mapped to the polygon. The object display step maps the texture to the three-dimensional object.

  In the third invention, the pattern display step may project the texture onto the polygon from a direction parallel to the central axis, and rotate the texture about the central axis for mapping.

  In the fourth invention, the deformation graphic may be an object (deformation object 40) having a three-dimensional side surface shape obtained by rotating a predetermined surface by a predetermined angle about the central axis. At this time, the three-dimensional object display program further causes the computer to execute a shadow processing step (S27). In the shading process step, the shading process is performed on the deformation graphic from a predetermined angle.

  In the fifth invention, the deforming graphic may represent only one side portion with respect to the central axis of the entire outer shape graphic. At this time, the graphic display step displays the deformation graphic so that the central axis is positioned at the edge of the display area.

  In the sixth invention, the deformation graphic may be constituted by a unit graphic (unit object 41) obtained by dividing the deformation graphic at a predetermined interval by a plane perpendicular to the central axis. At this time, the graphic transformation step transforms the distance from the unit graphic intersecting the straight line including the perpendicular line extending from the designated position to the central axis to the central axis according to the designated position. In the object display step, a three-dimensional object is generated such that the distance from each unit graphic to the central axis is each radius.

  In the seventh invention, the graphic deformation step may deform the deformation graphic so that the contour of the deformation graphic passes through the designated position.

  In the eighth invention, the three-dimensional object display program may cause the computer to further execute a deformation degree setting step. The deformation degree setting step sets the deformation degree (rotation speed) of the deformation graphic. In the graphic deformation step, the time until the contour of the deformation graphic reaches the position passing through the specified position is changed faster as the degree of deformation is larger. In the pattern display step, the texture is scrolled faster as the degree of deformation increases.

  According to the first invention, when the user performs deformation, the user is caused to perform an operation of deforming at least a part of the outer shape figure, so that only the radius information from the central axis is adjusted by the user. Then, a three-dimensional object is created with a solid obtained by rotating the deformed outer shape around the central axis as a final solid. Therefore, a final three-dimensional object can be created by simpler processing without adjusting the height for each grid point. Here, in such a method for creating a three-dimensional object, the three-dimensional object is not rotated, so that the state in which the three-dimensional object is rotated cannot be expressed well. Therefore, in the present invention, the solid figure is rotated by scrolling only the pattern, not by rotating the deformation graphic. From the above, it is possible to reduce the processing load on the computer compared to the method of adjusting the height (radius) for each grid point, and to express the state that the solid rotates without actually rotating the solid object. be able to.

  Further, according to the second aspect, by rotating the texture, it is possible to easily and realistically represent the state where the object is rotating. In addition, since the same texture is used for the finally created solid object, the amount of data required for the texture can be reduced.

  According to the third invention, it is possible to easily represent the state in which the solid represented by the deformation graphic rotates by mapping. Also, it becomes easy to express different patterns according to the distance from the central axis.

  According to the fourth aspect of the present invention, it is possible to express the deformation graphic with a more realistic solid by adding a shadow.

  According to the fifth aspect of the present invention, the amount of image data for expressing the deformation graphic can be reduced as compared with the case of using the deformation graphic representing the entire outline graphic. In addition, when using a deforming graphic representing the entire outline graphic, it is necessary to deform the contour on both sides with respect to the central axis. However, when using a deforming graphic representing only one side, only the one side is contoured. Can be transformed. Therefore, the process of deforming the deformation graphic is simplified as compared to the case of using the deformation graphic representing the entire outline graphic.

  According to the sixth invention, since the radius of the solid object is determined for each unit graphic, when creating a final solid object, the solid object may be generated based on the radius of each unit graphic. Therefore, a three-dimensional object can be easily created.

  According to the seventh aspect, since the position designated by the user becomes the contour of the deformation graphic, the deformation operation is intuitive and easy for the user to understand.

  According to the eighth aspect, the speed at which the deformation graphic changes is determined according to the degree of deformation, and the apparent rotational speed of the deformation graphic also changes according to the degree of deformation, so the deformation graphic is changed. It is possible to give the user a feeling that the strength changes according to the rotation speed.

  FIG. 1 is an external view of a portable game device that is an example of an information processing device according to an embodiment of the present invention. In FIG. 1, the game apparatus 1 according to the present embodiment is configured by housing two liquid crystal displays (hereinafter referred to as “LCD”) 11 and 12 in a housing 18 so as to be in a predetermined arrangement position. Specifically, in the case where the first LCD 11 and the second LCD 12 are placed one above the other and housed, the housing 18 includes a lower housing 18a and an upper housing 18b. The upper housing 18b is rotatably supported by a part of the upper side of the lower housing 18a. The upper housing 18b has a planar shape slightly larger than the planar shape of the second LCD 12, and an opening is formed so that the display screen of the second LCD 12 is exposed from one main surface. The lower housing 18a is formed with an opening that exposes the display screen of the first LCD 11 at a substantially central portion in the horizontal direction. The planar shape of the lower housing 18a is selected to be laterally longer than the upper housing 18b. In the lower housing 18a, a sound release hole for the speaker 15 is formed on either side of the first LCD 11, and the operation switch unit 14 is mounted on the left and right sides of the first LCD 11.

  The operation switch unit 14 includes operation switches 14a and 14b mounted on one main surface of the lower housing 18a on the right side of the first LCD 11, and a direction indicating switch mounted on one main surface of the lower housing 18a on the left side of the first LCD 11. 14c, start switch 14d, and select switch 14e. The action switches 14a and 14b are used, for example, to input instructions for jumping, punching, moving a weapon, etc. in an action game, and for acquiring an item and determining the selection of a weapon or command in a role-playing game (RPG) or a simulation RPG. Is done. The direction indication switch 14c is used for direction indication on a game screen, such as instructing a moving direction of a player object (or player character) that can be operated by a player (user), or instructing a moving direction of a cursor. If necessary, operation switches may be further added, or side switches 14f and 14g may be provided on the left and right of the upper surface (upper side surface) of the operation switch 14 mounting region in the lower housing 18a.

  A touch panel 13 (broken line area in FIG. 1) is attached to the upper surface of the first LCD 11. The touch panel 13 may be, for example, any type of resistive film type, optical type (infrared type), and capacitive coupling type, and the upper surface of the touch panel 13 is pressed, moved, or stroked with a stylus 16 (or a finger). When this is done, the coordinate position of the stylus 16 is detected and coordinate data is output.

  In the vicinity of the side surface of the upper housing 18b, a storage hole (a two-dot broken line region in FIG. 1) for storing the stylus 16 that operates the touch panel 13 as necessary is formed. The stylus 16 is stored in the storage hole. In a part of the side surface of the lower housing 18a, a cartridge insertion portion (for inserting a game cartridge 17 (hereinafter simply referred to as a cartridge 17) having a built-in memory (for example, ROM) storing a game program in a detachable manner. A one-dot broken line region in FIG. 1) is formed. The cartridge 17 is an information storage medium for storing a game program, and for example, a nonvolatile semiconductor memory such as a ROM or a flash memory is used. A connector (see FIG. 2) for electrical connection with the cartridge 17 is built in the cartridge insertion portion. Furthermore, an electronic circuit board on which various electronic components such as a CPU are mounted is accommodated in the lower housing 18a (or the upper housing 18b). The information storage medium for storing the game program is not limited to the non-volatile semiconductor memory, but may be a CD-ROM, a DVD, or an optical disk storage medium similar to them.

  Next, the internal configuration of the game apparatus 1 will be described with reference to FIG. FIG. 2 is a block diagram showing the internal configuration of the game apparatus 1.

  In FIG. 2, a CPU core 21 is mounted on the electronic circuit board housed in the housing 18a. A connector 28 for connecting to the cartridge 17 is connected to the CPU core 21 via a predetermined bus, an input / output interface (I / F) circuit 27, a first graphic processing unit (first GPU). 24, a second graphics processing unit (second GPU) 26, and a working RAM (WRAM) 22 are connected.

  The cartridge 17 is detachably connected to the connector 28. The cartridge 17 is a storage medium for storing the game program as described above. Specifically, the cartridge 17 includes a ROM 171 that stores a game program and a RAM 172 that stores backup data in a rewritable manner. The game program stored in the ROM 171 of the cartridge 17 is loaded into the WRAM 22, and the game program loaded into the WRAM 22 is executed by the CPU core 21. Temporary data obtained by the CPU core 21 executing the game program and data for generating an image are stored in the WRAM 22.

  The touch panel 13, the operation switch unit 14, and the speaker 15 are connected to the I / F circuit 27. The speaker 15 is disposed at the inner position of the above-described sound release hole.

  A first video RAM (hereinafter “VRAM”) 23 is connected to the first GPU 24, and a second video RAM (hereinafter “VRAM”) 25 is connected to the second GPU 26. In response to an instruction from the CPU core 21, the first GPU 24 generates a first game image based on data for generating an image stored in the WRAM 22. The generated first game image is drawn on the first VRAM 23 by the first GPU 24. The second GPU 26 generates a second game image based on data for generating an image stored in the WRAM 22 in response to an instruction from the CPU core 21. The generated second game image is drawn in the second VRAM 25 by the second GPU 26.

  The first VRAM 23 is connected to the first LCD 11, and the second VRAM 25 is connected to the second LCD 12. The first GPU 24 outputs the first game image drawn in the first VRAM 23 in response to an instruction from the CPU core 21 to the first LCD 11. Then, the first LCD 11 displays the first game image output from the first GPU 24. The second GPU 26 outputs the second game image drawn in the second VRAM 25 in response to an instruction from the CPU core 21 to the second LCD 12. Then, the second LCD 12 displays the second game image output from the second GPU 26.

  Hereinafter, the game process executed in the game apparatus 1 by the game program stored in the cartridge 17 will be described. In the present invention, only the first LCD 11 whose display screen is covered by the touch panel is used as the display device. Therefore, the game device according to the present invention may be configured without the second LCD 12. In other words, the game device according to the present invention can be realized by using a personal computer, a game device, a PDA, or the like that includes only one display device. In the present embodiment, the case where the program according to the present invention is executed as a game program by a game device will be described as an example. However, any information processing device that executes the program according to the present invention may be used. I do not care. For example, the information processing apparatus may be a portable terminal such as a PDA or a stationary personal computer.

  First, an outline of game processing executed in the game apparatus 1 will be described with reference to FIGS. In the following embodiment, a case where a state in which a cylindrical solid model imitating a log is rotated and cut is described as an example. That is, the game apparatus 1 displays a state in which a cylindrical solid simulating a log is rotating, and causes the player to perform an operation of cutting the solid. Furthermore, a state in which the solid is cut and deformed according to the operation by the player is displayed, and finally, the deformed solid 3D object is displayed. As described above, the game according to the present embodiment allows the player to experience a pseudo operation of processing (deforming) a solid body by cutting a rotating cylindrical solid body. In the following, the solid before the processing by the player is referred to as “initial solid”, and the solid when the processing is performed is referred to as “solid under processing”, and the processing by the player is completed. The solid is called the “completed solid”.

  FIG. 3 is a diagram illustrating an example of the game screen. The game screen shown in FIG. 3 is a screen before the player processes a log. In FIG. 3, a deformation graphic 30, a retry button 31, an end button 32, and a rotation speed adjustment bar 33 are displayed on the screen of the first LCD 11. The deformation figure 30 represents an external figure when a solid body having a cylindrical shape is viewed from a direction perpendicular to the central axis. The player processes the log by performing an operation described later on the deformation graphic 30. In FIG. 3, the deformation graphic 30 is displayed so that the central axis is located at the upper end of the screen. In other words, the whole outline figure when the circular log is viewed from the direction perpendicular to the central axis is not displayed on the screen, but only one half of the outline figure on the one side with respect to the central axis is displayed on the screen. Is displayed. In FIG. 3, the distance from the upper end of the screen to the opposite side represents the radius of the cylindrical log. Although details will be described later, the game apparatus 1 displays an object created with polygons as a deformation graphic 30.

  In FIG. 3, the deformation graphic 30 is displayed with a pattern representing a log. Here, the pattern is displayed so as to scroll in a direction perpendicular to the central axis, that is, to scroll from the top to the bottom (or from the bottom to the top) of the screen (arrows shown in FIG. 3). reference.). Specifically, the game apparatus 1 scrolls and maps the texture to be pasted on the polygon so that the pattern is scrolled. By scrolling the log pattern from top to bottom in this way, it seems to the player that the log is rotating. At this time, the game apparatus 1 does not need to rotate the object representing the deformation graphic 30 itself. That is, as the game process, only the process of changing the texture mapping need be performed. Therefore, it is possible to express the state in which the solid is rotating without rotating the object representing the deformation graphic 30 itself.

  The retry button 31 is a button that is instructed when the player redoes the processing of the solid in the initial state. The end button 32 is a button that is instructed when the player ends the processing of the deformation graphic. The rotation speed adjustment bar 33 is used by the player to adjust the rotation speed (in other words, the speed at which the solid is cut), which will be described later. An operation for processing the deformation graphic 30, an operation for designating the button, and an operation for adjusting the rotation speed adjustment bar 33 are performed by designating the position on the screen of the touch panel 13 using the stylus 16.

  FIG. 4 is a diagram illustrating a game screen in a state where processing by the player is being performed. FIG. 4 is a diagram illustrating a state in which the player is performing an operation of applying a stylus 16 to a log figure displayed as rotating, and cutting the log. The player performs an operation for processing the deformation graphic 30 by designating an arbitrary position on the screen using the stylus 16. That is, the deformation graphic 30 shown in FIG. 4 represents a solid being processed. Hereinafter, the position on the screen designated by the player is referred to as a designated position. FIG. 4 shows a state immediately after the player designates the point A in the state shown in FIG. When the designated position is located within the deformation graphic 30, the deformation graphic 30 is deformed so that the distance from the central axis (upper end of the screen) becomes short at the designated position. Specifically, the contour of the deformation graphic 30 is deformed at a portion that intersects with a straight line including a perpendicular drawn from the designated position to the central axis. More specifically, the deformation graphic 30 is deformed so that its outline passes through a specified position. In FIG. 4, a portion that intersects a straight line including a perpendicular line extending from the point A to the central axis is deformed so that the position of the point A becomes a contour. Therefore, the deformation graphic 30 is deformed such that the portion outside the specified position (point A) with respect to the central axis is deleted. Accordingly, the player can obtain a feeling that the deformation graphic 30 is being cut by the stylus 16. If the designated position is not located within the deformation graphic 30, the deformation graphic 30 is not deformed.

  In the present embodiment, the player plays by cutting the deformation graphic 30 so as to have a desired shape. If the operation fails, the player designates the position of the retry button 31 using the stylus 16. When the position of the retry button 31 is designated by the stylus 16, the game apparatus 1 returns the deformation graphic 30 to the initial state (the state shown in FIG. 3). Thereby, the player can redo the operation from the beginning when the operation fails.

  FIG. 5 is a diagram showing a game screen when the processing by the player is finished. When the player finishes cutting the deformation graphic 30 into a desired shape, the player designates the position of the end button 32 using the stylus 16. When the position of the end button 32 is designated by the stylus 16, the game apparatus 1 stops scrolling the log pattern. Then, a solid object representing the processed solid (completed solid) is created and displayed. The three-dimensional object is created based on the deformation graphic 30 deformed by the player. FIG. 6 is a diagram illustrating a game screen on which a three-dimensional object is displayed. The game screen shown in FIG. 6 is a screen intended for the player to appreciate the completed solid. In FIG. 6, a three-dimensional object 35 created in a virtual three-dimensional space is displayed. The player can rotate the solid object 35 in the direction of the line by drawing (dragging) the line on the screen with the stylus 16. Thereby, the player can appreciate the completed solid object from an arbitrary angle.

  As shown in the outline of the game processing described above, in the present embodiment, the processing to cut and process the rotating log is caused to be simulated by the player, and the processed result is checked to allow the player to check the processed result. A solid is displayed in three dimensions. Here, in this embodiment, a solid object representing a completed solid is created based on the radius from the central axis. Therefore, it is possible to easily create a three-dimensional object without performing a process of setting a plurality of grid points around the central axis and calculating the height of each grid point. In addition, when processing a solid, an object representing a log is not rotated, but a mapping of a texture to be attached to the object is scrolled to express a state in which the log is rotated. Thereby, in this embodiment, the game process at the time of processing becomes simple, and the processing load of the game apparatus 1 can be reduced.

  Next, the flow of game processing executed in the game apparatus 1 will be described with reference to FIGS. FIG. 7 is a main flowchart showing a flow of game processing executed in the game apparatus 1. When the power of the game apparatus 1 is turned on, the CPU core 21 of the game apparatus 1 executes a start program stored in a boot ROM (not shown), and each unit such as the WRAM 22 is initialized. Then, the game program stored in the cartridge 17 is read into the WRAM 22 and the execution of the game program is started. As a result, a game image is displayed on the first LCD 11 via the first GPU 24, so that the game is started. The flowchart shown in FIG. 7 shows the game process after the game is started.

  In FIG. 7, first, in step 10 (“step” in the figure is simply abbreviated as “S”), a plurality of images to be processed are displayed on the first LCD 11. The image to be processed is an image representing a solid (a solid in an initial state) to be processed by the player. In the present embodiment, images representing a plurality of solids having different shapes and patterns are displayed. In subsequent step 11, a solid to be processed is selected in accordance with an instruction from the player. In this embodiment, the process after step 12 mentioned later is performed about the selected solid. Thus, in this embodiment, a plurality of solids to be processed may be prepared, and the player may select a desired solid.

  Next, in step 12, the three-dimensional deformation graphic selected in step 11 is displayed. Specifically, an object representing a deformation graphic (deformation object) is arranged and displayed in a virtual three-dimensional space. In the present embodiment, the deformation object does not represent the shape of the solid body in the initial state. Hereinafter, a detailed configuration of the deformation object will be described.

  FIG. 8 is a diagram showing a deforming object used in the present embodiment. FIG. 8A is a diagram showing a deforming object when viewed from the same direction as that displayed on the screen, and FIG. 8B is a deforming object when viewed from a direction parallel to the central axis. It is a figure which shows an object. As shown in FIG. 8A, the deformation object 40 is composed of a plurality of unit objects 41. Each unit object 41 is obtained by dividing the deformation object 40 at a predetermined interval by a plane perpendicular to the central axis 42. In the present embodiment, the predetermined interval corresponds to the pixels of the first LCD 11, and the length of the predetermined interval is one pixel. Further, as shown in FIG. 8B, the unit object 41 is a side surface of a cylinder whose height is the length of the predetermined interval, the center axis is the center, and the center angle is 90 °. is there. The deformation object 40 has a configuration in which unit objects 41 are arranged along the direction of the central axis 42. Therefore, if a solid obtained by rotating a predetermined plane 360 ° about the central axis is an initial solid, the deformation object 40 is a side surface of the solid obtained by rotating the predetermined plane 90 ° about the central axis. In step 12 shown in FIG. 7, the viewpoint of the virtual camera that reflects the virtual three-dimensional space in which the deformation object 40 is arranged is such that one side of the deformation object 40 and the central axis 42 are visible at the upper end of the screen, and The other side of the deformation object 40 is set to a position where it can be seen inside the screen. Further, the retry button 31, the end button 32, and the rotation speed adjustment bar 33 are displayed, so that a game screen before the player performs the processing operation is displayed (see FIG. 3).

  Returning to the description of FIG. 7, after step 12, processing is performed in step 13. The processing process is a process for giving the player a sense of processing the solid in the initial state by deforming the deformation graphic. Hereinafter, details of the processing will be described with reference to FIGS. 9 to 13.

  9 and 14 are flowcharts showing the detailed processing of step 13 shown in FIG. In addition, the loop process of steps 20 to 34 in the processing process is performed during one frame. In the processing, first, in step 20, the coordinates of the position designated by the stylus 16 on the screen of the first LCD 11 are detected. Specifically, the CPU core 21 reads information indicating the coordinates from the touch panel 13. The designated position is determined by the processing of step 20. In the following step 21, it is determined whether or not the designated position determined in step 20 is on the deformation graphic. Specifically, the CPU core 21 determines whether or not the coordinates of the designated position indicate the inside of the screen area where the deformation image is currently displayed. The process of step 21 is a process for determining whether or not the deformation object needs to be deformed. If it is determined in step 21 that the designated position is on the deformation graphic, the processes in steps 22 to 25 are performed. The processes in steps 22 to 25 are processes for deforming the deformation object. On the other hand, if it is determined in step 21 that the designated position is not on the deformation graphic, the processing in steps 22 to 25 is skipped and the processing in step 26 is performed.

  Hereinafter, processing for deforming the deformation object will be described. First, the outline of the processing will be described with reference to FIG. FIG. 10 is a diagram illustrating how the unit object is deformed. FIG. 10A is a diagram showing a deformation object when viewed from the same direction as when displayed on the screen (when viewed from the viewpoint of the virtual camera), and FIG. It is a figure which shows one of the unit objects when it sees from a parallel direction. When the designated position is on the deformation graphic, first, the unit object to be deformed is specified. That is, on the plane of the screen, a unit object that intersects with a straight line including a perpendicular drawn from the designated position to the central axis 42 is specified as a unit object to be deformed. For example, if the designated position is point B shown in FIG. 10, the unit object 43 is specified as a unit object to be deformed. Next, the specified unit object is deformed so that its radius becomes small. In the example of FIG. 10, the unit object is deformed so that the radius (r1) of the unit object after the deformation becomes the distance (r1) between the specified position and the central axis. When the designated position is determined in step 20, the unit object is deformed as described above, so that the deformation object, that is, the deformation graphic is deformed. Details of the process of deforming the deformation object will be described below.

  Returning to the description of FIG. 9, first, in step 22, a unit object to be deformed is specified. In the following step 23, the distance on the screen plane between the current position of the unit object specified in step 22 and the designated position is calculated. Here, the current position of the unit object is the position of the lower end of the unit object on the screen plane. In other words, the current position of the unit object is a position farthest from the position of the central axis on the screen plane among the unit objects.

In step 24, the amount of change in the radius of the unit object specified in step 22 is calculated. Specifically, the CPU core 21 determines the amount of change (decrease) in radius according to the distance calculated in step 23 and the currently set rotation speed. When the distance is L and the rotation speed is V, the amount of change Δr is calculated using, for example, the following equation (1).
Δr = L × V / Vmax (1)
In Formula (1), Vmax is the maximum value that the rotation speed V can take. According to equation (1), the amount of change in radius is calculated in step 23 so that the amount of change increases in proportion to the magnitude of the rotational speed, and when the rotational speed is maximum. It is determined to be a distance.

  In the following step 25, the unit object is changed according to the change amount calculated in step 24. That is, the radius of the unit object is decreased by the amount of change calculated in step 24. Through the above steps 22 to 25, the deformation object is deformed based on the designated position.

  In the present embodiment, the game apparatus 1 stores a table in which the unit object is associated with the length of the radius in the WRAM 22. The game apparatus 1 manages the radius of each unit object using this table. FIG. 11 is a diagram illustrating an example of the table. In FIG. 11, the table associates a unit object number for identifying a unit object with the length of the radius of the unit object indicated by the unit object number. When the radius of the unit object is changed in step 25 described above, the CPU core 21 updates the contents of the table in the WRAM 22. This table is used when creating a three-dimensional object after finishing the processing.

  Returning to the description of FIG. 9, in step 26, the CPU core 21 scrolls the log texture in a direction perpendicular to the central axis and pastes the log texture on the deformation object. In the present embodiment, the texture shows a log pattern (for example, a wood grain pattern). Also, the texture is projected onto the deformation object from a direction parallel to the central axis, and is scrolled so as to rotate around the central axis. Hereinafter, a texture mapping method according to this embodiment will be described.

  FIG. 12 is a diagram schematically illustrating texture mapping in the present embodiment. FIG. 12A is a diagram showing the mapping relationship between the deformation object and the texture at a certain time (frame). As shown in FIG. 12A, in this embodiment, the texture 45 is projected and mapped onto the deformation object 40 from a direction parallel to the central axis 42. Mapping is performed so that the center position C of the texture corresponds to the center axis 42. As described above, the texture pattern appears as a line parallel to the central axis in a portion of the deformation object 40 having the same radius from the central axis. In FIG. 12, the pattern of the texture 45 is assumed to be two straight lines that intersect at the center of the texture for the purpose of simplifying the explanation. However, in the case of expressing an object simulating a log, the pattern of the texture 45 is a pattern that represents a tree ring (see FIG. 16B).

  FIG. 12B is a diagram showing the mapping relationship between the deformation object and the texture after a predetermined time has elapsed from the state shown in FIG. 12A (for example, the next frame). In FIG. 12B, the texture is scrolled so as to rotate around the central axis 42. That is, the object is mapped to the deformation object 40 so as to be rotated by a predetermined angle about the center position C. As a result, the straight line pattern mapped to the deformation object 40 in FIG. 12A is mapped to the position moved upward in the drawing from the position in FIG. As a result, the pattern of the deformation object 40 is scrolled and displayed in a direction perpendicular to the central axis 42. That is, it appears to the player that the deformation object 40 is rotating.

  In the present embodiment, the angle at which the texture is rotated from one frame to the next frame is determined according to the currently set rotation speed. Specifically, the angle at which the texture is rotated is determined to increase as the rotation speed increases. Accordingly, it is possible to show the player that the speed at which the deformation object 40 rotates changes according to the rotation speed. Therefore, in this embodiment, the greater the rotation speed, the greater the strength (Δr) for scraping the deformation object, and the higher the apparent rotation speed of the deformation object. Therefore, the player can realize that the strength of shaving changes according to the rotation speed, and can obtain a feeling close to that of actually shaving a log.

  In step 27 after step 26, shadow processing is performed. That is, the deformation object is shaded by using a virtual light set at a predetermined position in the virtual three-dimensional space. FIG. 13 is a diagram illustrating an example of a game screen on which a deformation graphic with a shadow is displayed. FIG. 13 shows a case where the irradiation direction of the virtual light is set to be the same as the direction of the line of sight. As shown in FIG. 13, by adding a shadow to the deformation graphic 30 (deformation object), it is possible to more realistically represent that the deformation graphic 30 is a curved surface, and the deformation graphic 30 is a side surface of a cylinder. Can be expressed more realistically. Note that the virtual light may be set at any position as long as the deformation object is shaded, but the direction in which the light irradiation direction is slightly angled from the direction perpendicular to the central axis It is preferable that This is because the portion of the deforming object where the radius from the central axis is changed is shaded, so that the unevenness generated in the deforming object by the processing becomes easy for the player to understand.

  After the shading process is performed in step 27, the deformation graphic is displayed on the first LCD 11 in step 28. That is, an image of the deformation object 40 viewed from a preset viewpoint is displayed on the first LCD 11. At this time, the above-described retry button 31, end button 32, and rotation speed adjustment bar 33 are displayed together with the deformation graphic. By performing the processing of step 28 for each frame, it is possible to display a state where the log is rotating.

  Next, in step 30 shown in FIG. 14, it is determined whether or not the rotation speed has been changed. Specifically, it is determined whether or not the position where the rotation speed adjustment bar 33 (see FIG. 3) is displayed is designated by the stylus 16. If it is determined in step 30 that the rotation speed has been changed, the process in step 31 is performed. On the other hand, when it is determined in step 30 that the rotation speed has not been changed, the process of step 31 is skipped and the process of step 32 is performed. In step 31, the magnitude of the rotational speed is changed. For example, the magnitude of the rotational speed after the change is determined according to the length from the right end of the rotational speed adjustment bar 33 to the designated position by the stylus 16. At this time, the length of the gauge of the rotation speed adjustment bar 33 (the hatched portion of the rotation speed adjustment bar 33 shown in FIG. 3) is changed according to the change of the rotation speed. After step 31, the process of step 32 is performed.

  In step 32, it is determined whether or not a retry button has been designated. Specifically, it is determined whether or not the position where the retry button 31 (see FIG. 3) is displayed is designated by the stylus 16. If it is determined in step 32 that the retry button has been designated, the process in step 33 is performed. On the other hand, if it is determined in step 32 that the retry button is not designated, the process in step 33 is skipped and the process in step 34 is performed. In step 33, the shape of the deformation object is returned to the initial state. That is, the radius from the central axis of all unit objects is returned to the initial state. At this time, the contents of the table are also updated to the contents in the initial state. After step 33, the process of step 34 is performed.

  In step 34, it is determined whether or not the processing is completed. That is, it is determined whether or not the position where the end button 32 (see FIG. 3) is displayed is designated by the stylus 16. If it is determined in step 34 that the processing has ended, the CPU core 21 ends the processing. On the other hand, if it is determined in step 34 that machining has not been completed, the process returns to step 20. Thereafter, the processes in steps 20 to 34 are repeated until it is determined in step 34 that the processing has been completed. This is the end of the description of the processing process.

  Returning to the description of FIG. 7, after the processing process in step 13, an exhibition process is performed in step 14. The exhibition process is a process of creating a solid object representing a completed solid using the deformation graphic deformed by the processing process and displaying the created solid object. Details of the exhibition process will be described below.

  FIG. 15 is a flowchart showing details of the processing in step 14 shown in FIG. In the exhibition process, first, in step 40, a solid object representing a completed solid is created. That is, a three-dimensional object obtained by rotating the deformed graphic for deformation about the central axis is created. Specifically, the CPU core 21 refers to the radius of each unit object in the table stored in the WRAM 22. Then, a solid object is created according to each radius. For example, when the deformation graphic shown in FIG. 5 is obtained by the player's operation, the solid object shown in FIG. 6 is created. Note that the same texture as that used for the deformation object can be used as the texture to be pasted to the three-dimensional object.

  FIG. 16 is a diagram illustrating an example of the three-dimensional object created in step 40 of FIG. FIG. 16A shows an example of a three-dimensional object before the texture is pasted, and FIG. 16B shows an example of a texture showing a log pattern. In step 40 of FIG. 15, first, a solid object 50 as shown in FIG. 16A is created. Next, a texture 51 shown in FIG. 16B is pasted on the created three-dimensional object 50. As described above, the texture is projected from a direction parallel to the central axis (see the arrow shown in FIG. 16A). Thereby, different patterns can be easily given to the object according to the radius from the central axis. An example of the three-dimensional object obtained by pasting the texture 51 shown in FIG. 16 (b9) on the three-dimensional object 50 shown in FIG. 16 (a) is shown in FIG. In the exhibition process, the three-dimensional object 52 shown in FIG. 17 is displayed on the first LCD 11.

  Returning to FIG. 15, in step 41 following step 40, the three-dimensional object created in step 40 is displayed on the first LCD 11 (see FIG. 17). Thereby, the player can confirm the three-dimensional display in which the player has performed the processing operation using the stylus 16. In the subsequent step 42, it is determined whether or not a drag operation has been performed. The drag operation is an operation for drawing a line on the screen of the first LCD 11 with the stylus 16. If it is determined in step 42 that a drag operation has been performed, processing in step 43 is performed. That is, in step 43, the three-dimensional object displayed in step 41 is rotated and displayed. The three-dimensional object is rotated in the direction of a line on which a picture is drawn by a drag operation, for example. Thereby, the player can see the solid obtained by the processing operation from an arbitrary angle. After step 43, the process of step 44 is performed. On the other hand, when it is determined in step 42 that the drag operation is not performed, the process of step 43 is skipped and the process of step 44 is performed.

  In step 44, it is determined whether or not the exhibition has ended. That is, it is determined whether or not an end button is designated in the exhibition process. If it is determined in step 44 that the exhibition has ended, the CPU core 21 ends the exhibition process. On the other hand, if it is determined in step 44 that the exhibition has not ended, the process returns to step 42. Thereafter, the processing in steps 42 to 44 is repeated until it is determined in step 44 that the exhibition is finished. This is the end of the description of the exhibition process.

  Returning to the description of FIG. 7 again, after the exhibition process in step 14, it is determined in step 15 whether or not the game is over. The determination in step 15 is made based on, for example, whether or not the player has pressed a predetermined button that instructs the game to end. In this determination, if it is determined that the game is not over, the process returns to step 10 and the processes of steps 10 to 15 are repeated until it is determined in step 15 that the game is over. On the other hand, if it is determined in step 15 that the game is over, the CPU core 21 ends the game process shown in FIG.

  As described above, according to the present embodiment, in the processing process, only information (contents of the table shown in FIG. 11) necessary for creating a solid object representing a completed solid is managed, and at the stage of the processing process Do not create solid objects. Therefore, the operation of deforming (shaping) the rotating solid can be expressed by a simple process. In addition, by scrolling only the texture without performing the process of actually rotating the deformation object, it is possible to express the state of the object rotating with a simple process.

  In the above embodiment, the case where the solid to be processed (the solid in the initial state) is a cylindrical shape has been described as an example, but the shape of the solid is a predetermined surface (what is the shape of the predetermined surface) As long as it is a solid obtained by rotating 360 ° with respect to the central axis. Moreover, in the said embodiment, although the solid | solid which becomes a process target imitated a log and demonstrated the case where the texture showing a grain pattern was used as an example, what kind of texture may be sufficient. FIG. 18 is a diagram illustrating an example of a texture used in another embodiment. The texture shown in FIG. 18 represents the character's face. Further, when the texture shown in FIG. 18 is pasted on a cylindrical solid object, the solid object shown in FIG. 19 is displayed. By using the texture shown in FIG. 18, the player can play by processing the face of the character in three dimensions.

  Further, in the above-described embodiment, the entire external shape when the solid in the initial state is viewed from the direction perpendicular to the central axis is not displayed, but only a half (one side with respect to the central axis) of the external shape is displayed. displayed. Therefore, the game apparatus uses a deformation figure (deformation object) representing only the half portion. Here, in another embodiment, a deformation graphic representing the entire outer shape figure may be used to display the entire outer shape graphic. Further, the deformation graphic only needs to represent at least a part of the external graphic, and the game device does not necessarily display half of the external graphic. Note that in order to be able to process all of the solid in the initial state, it is necessary for the game device to display at least one side portion with respect to the central axis of the entire outline figure as in the above embodiment. is there.

  Moreover, in the said embodiment, the touch panel 13 was demonstrated as an example as an input means to designate the position on a screen. Here, in another embodiment, the input unit may be any input device that can specify an arbitrary position on the screen. For example, the input means may be a mouse, or an object displayed on the screen may be operated using a cross key. FIG. 20 is a diagram illustrating an example of a game screen according to another embodiment. In FIG. 20, an object 55 imitating a drill is displayed, and the player operates the object 55. At this time, the position of the tip of the object 55 is a position designated by the player. The object 55 may be operated using a mouse or may be operated using a touch panel.

  In the above embodiment, the case where the texture is projected from the direction parallel to the central axis has been described. Here, in another embodiment, the texture projection direction may be, for example, a direction perpendicular to the central axis. However, when a texture is projected from a direction perpendicular to the central axis, it is necessary to prepare a plurality of types of textures in order to display different patterns according to the radius of the solid. That is, in this case, different patterns are displayed in accordance with the radius from the central axis of the solid by pasting different textures on the portions having different radii.

  In another embodiment, the deformation object may be configured by a plane perpendicular to the line of sight. As a result, the number of polygons for forming the deformation object can be reduced as compared with the case of the above embodiment.

  In the above-described embodiment, the deformation graphic is generated and displayed three-dimensionally by the deformation object formed of polygons. Here, in another embodiment, the deformation graphic may be displayed two-dimensionally. For example, an image representing a pattern may be scrolled and displayed.

  In the above-described embodiment, the case where the initial solid is deformed (that is, the radius from the central axis is reduced) has been described. However, in the other embodiments, the initial solid radius is set to be smaller. You may deform | transform so that it may increase. Specifically, in FIG. 3, even when the designated position designated by the player is not located within the deformation graphic 30, the contour of the deformation graphic 30 is deformed so as to pass through the designated position. That is, the radius of the unit object that intersects with the perpendicular line extending from the designated position to the central axis 42 is increased. Thus, for example, it is possible to express a state in which a thread is wound around a columnar solid to increase the radius.

  Moreover, as a game example to which the above embodiment is applied, for example, the following game can be considered. That is, a game in which a solid with an ideal shape is set in advance and a score is given according to the degree of similarity between the solid processed by the player and the solid with the ideal shape is conceivable. In addition, a game in which a target shape is presented to the player by displaying a hole having a predetermined shape on the screen and the player processes the hole so as to enter the hole is conceivable.

  INDUSTRIAL APPLICABILITY The present invention can be used as an information processing apparatus that allows a player to experience the operation of processing (deforming) a rotating solid and a program executed in the information processing apparatus.

1 is an external view of a portable game device that is an example of an information processing device according to an embodiment of the present invention. Block diagram showing the internal configuration of the game apparatus 1 Figure showing an example of the game screen The figure which shows the game screen in the state in the middle of the process being performed by the player The figure which shows the game screen when the process by a player is complete | finished The figure which shows the game screen where the solid object is displayed Main flowchart showing the flow of game processing executed in the game apparatus 1 The figure which shows the object for a deformation | transformation used in this embodiment. The flowchart which shows the detailed process of step 13 shown in FIG. The figure which shows a mode that a unit object is transformed The figure which shows an example of the table stored in WRAM22 The figure which shows the mapping of the texture in this embodiment typically The figure which shows an example of the game screen on which the deformation | transformation figure to which the shadow was attached was displayed The flowchart which shows the detailed process of step 13 shown in FIG. The flowchart which shows the detail of the process of step 14 shown in FIG. The figure which shows an example of the solid object created by step 40 of FIG. The figure which shows an example of the solid object displayed in an exhibition process The figure which shows the example of the texture used in other embodiment. The figure which shows the example of the solid object in other embodiment The figure which shows an example of the game screen in other embodiment.

Explanation of symbols

1 Game device 11 1st LCD
13 Touch Panel 16 Stylus 21 CPU Core 22 WRAM
30 Deformation figure 35, 50, 52 Solid object 40 Deformation object 41 Unit object 42 Center axis 45, 51 Texture

Claims (9)

A three-dimensional object display program for causing a computer to display a three-dimensional object obtained by transforming a solid in an initial state on a display device,
The solid in the initial state is a solid obtained by rotating a predetermined plane about the central axis,
A graphic display step for causing the display device to display a deformation graphic representing at least part of an external graphic when the solid in the initial state is viewed from a direction perpendicular to the central axis ;
Depending on the operation by the User chromatography THE, a designation position determination step of determining an arbitrary position on the screen of the display device as designated position,
A deformation degree setting step for setting a deformation degree of the deformation figure;
A graphic deformation step for deforming and displaying the contour of the graphic for deformation at a portion intersecting with a straight line including a perpendicular line extending from the specified position to the central axis according to the specified position;
An object display step of creating a three-dimensional object obtained by rotating the outline graphic around the central axis using the deformation graphic deformed in the graphic deformation step and causing the display device to display the object. to be executed,
The graphic deformation step, the speed of deforming the contour of the deformed graphic, Ru is changed according to the deformation degree set in the deformation degree setting step, the three-dimensional object display program. Causing the computer to further execute a pattern display step of scrolling the pattern of the deformation graphic in a direction perpendicular to the central axis and displaying the pattern on the display device;
The graphic display step creates the deformation graphic with polygons in a virtual three-dimensional space,
In the pattern display step, the texture representing the pattern of the deformation graphic is scrolled in a direction perpendicular to the central axis and mapped to the polygon,
The three-dimensional object display program according to claim 1, wherein the object display step maps the texture to the three-dimensional object.   The solid object display according to claim 2, wherein the pattern display step projects the texture onto the polygon from a direction parallel to the central axis, and maps the texture by rotating the texture around the central axis. program. The deformation graphic is an object having a shape of a three-dimensional side surface obtained by rotating the predetermined surface by a predetermined angle about the central axis,
The three-dimensional object display program according to claim 2, further causing the computer to execute a shadow processing step of performing a shadow process on the deformation graphic from a predetermined angle. The deformation graphic represents only one side portion of the entire outer shape with respect to the central axis,
The three-dimensional object display program according to claim 2, wherein the graphic display step displays the deformation graphic so that the central axis is positioned at an edge of a display area. The deformation graphic is constituted by a unit graphic obtained by dividing the deformation graphic at a predetermined interval by a plane perpendicular to the central axis.
In the graphic transformation step, the distance from the unit graphic that intersects with a straight line including a perpendicular drawn from the designated position to the central axis to the central axis is transformed according to the designated position
The said object display step is a solid object display program of Claim 1 which produces | generates the said solid object so that the distance from each said unit figure to the said central axis may become each radius.   The three-dimensional object display program according to claim 1, wherein in the graphic deformation step, the deformation graphic is deformed such that an outline of the deformation graphic passes through the designated position. Causing the computer to further execute a pattern display step of scrolling the pattern of the deformation graphic in a direction perpendicular to the central axis and displaying the pattern on the display device;
Before SL graphic deformation step, the time until the contour of the deformed graphic is a position passing through the designated position is changed rapidly the larger the deformation degree,
The three-dimensional object display program according to claim 7, wherein in the pattern display step, the texture is scrolled faster as the degree of deformation is larger. Storage means for storing the three-dimensional object display program according to any one of claims 1 to 8,
An information processing apparatus comprising: a program execution unit that executes a three-dimensional object display program stored in the storage unit.

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