JPH03240881A - Display device for surface - Google Patents

Abstract

PURPOSE:To visually easily display a relation in the sizes of surfaces by provid ing a storage device to store the information of the surfaces, input device to input a select signal to select the processing surface and the correction signal, geometrical processor to generate 3 isometric curves of the surfaces, and output device to display the output contents of this geometical processor. CONSTITUTION:When the surface to be processed is selected by an input device 1-1, the select signal is sent to a geometrical processor 1-3. Based on the select signal sent from the input device 1-1, the geometrical processor 1-3 calls surface data to be an object from a storage device 1-2. In such a way, the 3 isometric curves of surfaces are generated on a three-dimensional space, changed to display data and sent to an output device 1-4. Based on the display data sent from the geometical processor 1-3, the output device 1-4 executes the 3 isometric display of the surfaces.

Description

[Detailed description of the invention] Two industrial fields of use] The major invention relates to a surface display method.

:Prior Art] Conventionally, the three-isometric curve display of a plane and a quadratic curve is qualitative regardless of the size of the surface.

For example, when a plane is displayed using nine 3-isometry lines, the 3-isometry lines are displayed at the positions of the lines that evenly divide the plane into n+1 parts, regardless of the size of the plane.

[Problem to be solved by the invention]

Conventionally, three isometric curve representations of planar and quadratic surfaces are qualitative regardless of the size of the surface.

In this case, the 3-isometric curve becomes discontinuous at the joint between adjacent surfaces, making it unsuitable for displaying a shape composed of a plurality of adjacent surfaces.

Furthermore, since the number of three isometric curves is constant regardless of the size of the surface, there is a drawback that it is difficult to visually understand the size relationship between the surfaces as in the conventional diagram of FIG.

[Means for Solving the Problem] The configuration of the surface display device of the present invention includes: a storage device for storing surface information; an input device for inputting a selection signal for selecting a surface to be processed and a correction signal thereof; Special C embodiment characterized by a geometric processing device that is connected to an input device and a storage device to generate a three-isometry curve of a surface, and a snake that is equipped with an output device that displays the output contents of this geometric processing device] Next Next, the present invention will be explained with reference to the drawings.

As shown in FIG. 1, the surface display device includes a selection signal for selecting a surface to be processed and an input device 1 for inputting a correction signal therefor.
-1 and a storage device 1-2 for storing data of the surface to be processed.
The geometrical processing device 1-3 is connected to the input device and the storage device and generates a 3-isometry curve of a surface, and the output device 1-4 displays the output contents of the geometrical processing device.

The input device 1-1 is a keyboard or a tablet.

The storage device 1-2 is made up of a tisf device, etc., and the output device 1-4 is made up of a graphic display, a hard copy, etc.

Input devices 1 to 1 input a selection signal for selecting a surface to be processed and a correction signal therefor.

The storage device 1-2 stores surface data for performing geometric processing.

The geometry processing device 1-3 first reads target surface data from the storage device 1-2 based on the selection signal from the input device 1-1.

Next, the boundary information of the surface in the three-dimensional space is converted onto the parameter plane. At this time, parameter transformation is performed so that the distance between any two points on the parameter plane becomes equal to the distance between two corresponding points on the three-dimensional space. Furthermore, the origin on the parameter plane is made to correspond to the origin on the three-dimensional space.

By doing so, boundary information obtained by parameter conversion of boundary information of different surfaces is defined based on the same origin.

Next, the boundary line of the surface is divided into broken lines in a three-dimensional space by a number of divisions proportional to the length of the line, and boundary information of the broken line surface is generated. The boundary information of the surface in this three-dimensional space is converted onto the parameter plane. At this time, parameter transformation is performed so that the distance between any two points on the parameter plane becomes equal to the distance between two corresponding points on the three-dimensional space. Furthermore, the origin on the parameter plane is made to correspond to the origin on the three-dimensional space.

By doing so, boundary information obtained by parameter conversion of boundary information of different surfaces is defined based on the same origin.

Once the boundary information of the surface on the parameter plane is obtained,
Three isometric lines obtained by cutting straight lines defined in a lattice shape at equal intervals from the origin on the parameter plane at boundary lines of the surface are inversely transformed into a three-dimensional space.

Once you have obtained the boundary information of the 8-dimensional surface on the parameter plane,
Three isometric lines obtained by cutting straight lines defined at equal intervals from the origin on the parameter plane at boundary lines of the surface are inversely transformed into a three-dimensional space.

Finally, the output device 1-4, which changes the data to be returned to the output device, displays three isometric curves of the surface based on the display data sent from the geometry processing device 1-3.

When a surface to be processed is selected using the input device 1-1, a selection signal is sent to the geometric processing device 1-3.

The geometry processing device 1-3 first reads target surface data from the storage device 1-2 based on the selection signal sent from the input device 1-1.

In this way, three isometric curves of a surface in three-dimensional space are generated, changed into display data, and sent to the output device 1-4.

The output device 1-4 performs three isometric display of the surface based on the display data sent from the geometric processing device 1-3 (the third
(see figure).

〔Effect of the invention〕

The surface display device according to the present invention is as described above, and can achieve the following effects.

When displaying a shape in which multiple surfaces are adjacent to each other, the continuity of the three isometric curves is guaranteed at the joints between the adjacent surfaces.

Furthermore, since the number of three isometric curves increases or decreases in proportion to the size relationship of the surfaces, it is easy to visually understand the size relationship of the surfaces.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing processing in an embodiment of the present invention, and FIG. 2 shows processing results in this embodiment. Furthermore, FIG. 3 is a diagram showing the results of conventional processing. 1-1...Input device, 1-2...Storage device, 3...Geometry processing device, 1-4...
・Output device.

Claims (1)

[Claims] a storage device for storing surface information; an input device for inputting a selection signal for selecting a surface to be processed and a correction signal therefor; and a geometric processing device connected to the input device and storage device to generate a three-isometry curve for the surface. 1. A surface display device comprising: a geometric processing device; and an output device for displaying output contents of the geometric processing device.