JPH058471B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for inputting three-dimensional data in a computer drafting system.

``Prior Art'' Conventionally, in computer drafting systems commonly called CAD or CAM, a flat data input device called a double mouse or double digitizer is used for X-Y
It was used only for inputting plane coordinate values such as data. Therefore, when inputting three-dimensional coordinate values into a computer as data, either input them as data from two directions and combine them, or assume a plane that defines the depth direction and calculate the position on that plane as a three-dimensional coordinate value. I was converting it to data.

However, in order to confirm that the input results using the conventional method are correct in terms of three-dimensional figures, it is necessary to
A graphical display in two projection directions was required. In addition, although the operation requires two steps and is time-consuming, it is difficult to confirm that the input result in the first step is correct in terms of three-dimensional graphics.

For example, as shown in Figure 6, if there is only one confirmation graphic using an oblique projection view viewed from an arbitrary direction, point A as the previously input three-dimensional data and point A as the newly input three-dimensional The three-dimensional graphical positional relationship of data point B is unknown.

As shown in Figure 7 A and B, if two planar projections from different directions are used, the point A
The positional relationship between and point B can be confirmed. Therefore, flat data input devices generally display the formats shown in FIG. 7A and 7B. However, it was not possible to confirm that the input result was correct in terms of three-dimensional figure only by displaying the input result at the first stage shown in FIG. 7A.

Conventionally, in a computer drafting system, when two-dimensional data or three-dimensional data is input by operating a flat data input device, the plane of point B, which is the input data, as shown in FIG. The graphical or three-dimensional graphical position was displayed in association with the reference point A. However, at different depths at the same point as seen from the projection direction,
If there is an existing reference point A, it is impossible to select point B, which is newly input data. For this reason, conventionally, when inputting and confirming the existing 3D reference point A and the new 3D input point B at the same time, it was difficult to confirm the input of reference point A without causing duplication on the display. In order to confirm new three-dimensional input, two plane projection screens were used, resulting in a total of three projection screens.

"Problems to be Solved by the Invention" The present invention has been made in view of the above problems, and it is possible to input three-dimensional data using a flat data input device, and also to solve the problem of the input results. The object of the present invention is to provide a three-dimensional data input method that can confirm that the data is geometrically correct using a confirmation screen.

"Means to solve the problem" As a concrete means to solve the above problem,
According to the present invention, there is provided an input method for inputting three-dimensional data into a computer using a planar data input device in a computer drafting system, and a reference point is displayed on a confirmation screen based on the inputted three-dimensional data. , set the reference point as the coordinate origin of the X-Y-Z coordinates of the three-dimensional data to be newly input, and set the three unit-length line segments with arrows that intersect at the coordinate origin as the X-Y-Z coordinate axis. is displayed on the confirmation screen so as to be an obliquely projected diagram, and the planar data input device Drop a perpendicular line from the input point to any of the X, Y, or Z coordinate axes included in the area,
The coordinate value of the foot of the perpendicular line is actually X, Y or Z
It is assumed that the data has been input as one of the coordinate values, and the point determined by the X, Y or Z coordinate value that is considered to have been input is used as the next X, Y or Z coordinate axis to be determined. At the same time as the new coordinate origin of the point to be input in the area of A three-dimensional data input method for a computer drafting system is provided, characterized in that coordinate values in the axial direction are determined for each axis, and the determined coordinate values are displayed on the confirmation screen.

"Operation" According to the above configuration, the position of the point of the three-dimensional data to be newly inputted is determined for each of the X-axis, Y-axis, and Z-axis by using the inputted three-dimensional data as a reference point. You can enter the distance from the reference point in each axis direction while checking the numerical display on the confirmation screen.

"Embodiments" Examples of the present invention will be described below with reference to FIGS. 1 to 5.

As shown in FIG. 5, the apparatus used in this embodiment includes a computer 1 connected to a planar data input device 2, confirmation graphics 3 based on an oblique projection view, and a keyboard 4.

In the above configuration, the following procedure is used to input three-dimensional data to the computer 1 using the planar data input device 2. First, by operating the planar data input device 2 in advance, each numerical value of the X axis, Y axis, and Z axis is inputted, and three-dimensional data based on each numerical value is set as point a, as shown in FIG. Enter. At the same time, the reference point A corresponding to point a is displayed on the screen of the confirmation graphics 3, as shown in FIG.

Note that if the reference point A based on three-dimensional data has already been input, this input operation can be omitted.

When the reference point A is displayed on the confirmation graphics 3, a cross-shaped cursor is automatically moved as shown in FIG. It moves to match the reference point A.

Next, the operator inputs the flat data input device 2.
Enter the projection direction by key-in. As a result, as shown in FIG. 2, three vectors of unit length (hereinafter referred to as unit axis vectors) are displayed starting from the reference point A. With this display, the operator can set the reference point A as the coordinate origin on the confirmation graphics 3, and set each projection direction as the X-axis, Y-axis,
An X-Y-Z coordinate space with an axis and a Z-axis can be visually recognized.

Note that the direction of the unit axis vector can also be determined in advance by operating the keyboard 4.

Figure 3 shows how to input the position of the next three-dimensional data point on any of the X, Y, and Z axes with respect to the reference point A based on the assembly drawing, floor plan, etc. FIG. 4 is an explanatory diagram showing area division for the computer to determine whether the image is to be displayed.

The explanatory diagram is displayed corresponding to the X-Y-Z coordinate space displayed on the confirmation graphics 3, and the bisector of the angle formed by the X-axis and Y-axis, and the Y-axis and Z-axis. The area is divided by the bisector line formed by the line and the bisector line formed by the Z axis and the X axis. For example, the region on the positive side of the X-axis is a diagonally shaded region included in the angle iAj, and programming is such that if point p is indicated with a cursor, input processing is performed as positive data on the X-axis.

Therefore, the position of the point of the input three-dimensional data is
For each coordinate axis on the screen of Confirmation Graphics 3,
No need to match exactly.

FIG. 4A shows a screen of the confirmation graphics 3 for converting the indicated position by the planar data input device 2 into an input amount as a numerical value on the X axis. The operator inputs point B ₁ ' into the confirmation graphics 3 using the touch pen of the flat data input device 2.

For this point B ₁ ', the computer 1 performs processing to input a numerical value on the positive side of the X axis, as shown in the explanatory diagram of region division in FIG. 3. That is, on the X axis, which is a straight line passing through the reference point A,
The leg of the perpendicular line below point _B1 ' is point B'', and reference point A
Find it by dividing the distance from point B'' on the confirmation graphics 3 screen by the length of the unit axis vector of the X axis on the confirmation graphics 3 screen.
The value becomes the distance of point B″ from the reference point A in the X-axis direction, and is considered to be the data actually input as the value of the X coordinate.In the case of the example, the value is +2. When the coordinate point of the X-Y-Z coordinate is (x, y, z), the coordinate value of point B'' is (x+
2, y, z).

Next, when the operator inputs the X-axis value +2 using the flat data input device 2, this X-axis value +2 is automatically input into the computer 1.
Move to the unit axis vector B″ point (Figure 4b).

If this point B'' is taken as the center point of the explanatory diagram shown in Figure 3, that B'' point becomes a new reference point, and the area division shown in Figure 3 is applied to the next input point _B2 '. Accordingly, the computer 1 performs processing for inputting numerical values on the positive side of the Y axis. The foot of the perpendicular line drawn from point _B2 ' to the Y axis is defined as B', and the distance from the point B'' to point B' on the screen of confirmation graphics 3 is calculated in the same way as for the X axis. The calculated value is considered to be the data actually input as the Y coordinate value.In this case, it is +2, and when the operator inputs the Y-axis value +2 using the flat data input device 2, the Y-axis is automatically changed. The value +2 is input to computer 1, and the unit axis vector moves to point B' (Figure 4c).

The coordinate values of the X-Y-Z coordinates of point B' at this time are (x+2, y+2, z).

Using this point B' as a new reference point, for the next input point _B3 ', computer 1 calculates the foot of the perpendicular line drawn from point _B3 ' to the Z axis, as in the case of the X and Y axes. is set as B, and the distance from the point B' to point B on the screen is calculated using the confirmation graphics 3. Then, the calculated value is regarded as the data actually input as the Z coordinate value. In this case, the calculated value is +
1, and the operator uses the flat data input device 2.
When the Z-axis value +1 is inputted, the Z-axis value +1 is automatically input to the computer 1 and the unit axis vector moves to point B (FIG. 4D).

The coordinate values of the X-Y-Z coordinates of point B at this time are (x
+2, y+2, z+1).

As described above, the operator inputs the values of each of the X, Y, and Z axes in any order for each axis, and when the reference value that moves with each input moves to a predetermined position,
Operate the input keys to complete the input of 3D data.

In the above-described embodiment, points of three-dimensional data defining a three-dimensional figure can be input into the computer 1 one after another by repeating the same process using the point B as a new reference point.

By the above method, a flat data input device can be used for inputting three-dimensional data,
Furthermore, by pointing a cursor at a position on the three-dimensional coordinates on the confirmation graphics 3 using a three-dimensional projection map, it is possible to input into the computer 1 the numerical values of the X-axis, Y-axis, and Z-axis relative to the reference point.

"Effects of the Invention" The three-dimensional data input method of the present invention has the above configuration, and can input three-dimensional data into a computer using a flat data input device, and can also input the input results diagonally. The recognition screen displayed as a projected image has the effect of easily confirming that the three-dimensional figure is correct.

[Brief explanation of drawings]

Figures 1A and 1B are a front view showing a state in which the cursor is pointed at the reference point A on the confirmation graphics screen, a front view showing the case where point a is input on the screen of the flat data input device, and Figure 2. The figure is a front view showing the state in which the unit length of the vector of the unit axis is displayed on the confirmation graphics, Figure 3 is an explanatory diagram showing the division of positive and negative areas with respect to the coordinate axes of the three-dimensional data to be input, and Figure 4 is This is a confirmation graphics screen for converting the indicated position of the flat data input device to the input amount as a numerical value for each coordinate axis. , and C in the same figure shows the case of the Z axis. FIG. 2 shows a confirmation graphics screen when inputting three-dimensional data is completed. FIG. 5 is a block diagram showing a device that implements the input method of this embodiment, FIG. 6 is a front view showing a state in which two points are displayed on the screen of an oblique projection diagram using the conventional method, and FIG. , b are front views showing a state in which two points are displayed on the screen of two planar projections viewed from different directions. 1... Computer, 2... Planar data input device, 3... Confirmation graphics, 4... Keyboard.

Claims (1)

[Claims] 1. An input method for inputting three-dimensional data into a computer using a flat data input device in a computer drafting system, the method comprising: displaying a reference point on a confirmation screen based on the input three-dimensional data; Then, set this reference point as the coordinate origin of the X-Y-Z coordinates of the three-dimensional data to be newly input, and set the three unit-length line segments with arrows that intersect at the coordinate origin as the X-Y-Z The coordinate axes are displayed on the confirmation screen as an oblique projection map, and the X-Y-
From the point input by the planar data input device within a region bounded by the bisector of the angle formed by two adjacent coordinate axes of the Z coordinate axis,
Drop a perpendicular line to either the Y or Z coordinate axis, and consider the coordinate value of the foot of the perpendicular line to be data that has actually been input as the coordinate value of either the X, Y or Z coordinate, and this is considered to have been input. X,Y
Alternatively, the point determined by one of the coordinate values of the Z coordinate is set as the new coordinate origin of the point to be input in the area of the X, Y or Z coordinate axis to be determined next, and the three lines that intersect at the coordinate origin are Move the line segment with an arrow of unit length to the new coordinate origin, sequentially determine coordinate values in the X, Y, and Z axis directions for each axis, and display the determined coordinate values on the confirmation screen. A three-dimensional data input method for a computer drafting system characterized by the following.