JPH0778271A - 3D shape generation system - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a three-dimensional shape generation system,
A conceptual drawing or drawing is displayed on the screen, and these are copied or traced to define the cross-sectional shape, and the dimension value, constraint condition, and depth amount are specified on the drawing and defined, and three-dimensional based on these definitions. An object of the present invention is to complete a shape, import a conceptual drawing, a drawing, and the like to easily and quickly define a cross-sectional shape to generate a three-dimensional shape and to easily specify an extrusion amount on the drawing. [Arrangement] Capture processing 2 for capturing a conceptual drawing or drawing and displaying it on a screen, and cross-sectional shape generation processing 4 for generating and displaying a cross-sectional shape corresponding to a cutout instruction of a surface displayed on the screen. A three-dimensional shape generation process 5 for generating a three-dimensional shape by extruding the cross-sectional shape in a designated direction in response to the input of dimensions and constraint conditions of the generated cross-sectional shape and the input of the depth is configured. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional shape generation system for generating a three-dimensional shape from a sectional shape.

[0002]

2. Description of the Related Art Conventionally, a three-dimensional CAD that supports the design of a three-dimensional shape defines a cross-sectional shape as shown in FIG. 7A, and based on this cross-sectional shape, a cross-sectional shape shown in FIG. As shown
A method of creating a three-dimensional shape by pushing in the direction of the arrow is used. When defining the cross-sectional shape of FIG. 7A, the designer defines the cross-sectional shape from a blank sheet by using a three-dimensional CAD system with reference to conceptual drawings and drawings, as shown in FIG. . When the cross-sectional shape is defined, the depth amount is specified and extruded to complete the three-dimensional shape. The operation of the configuration shown in FIG. 8 will be briefly described below.

In FIG. 8, the designer displays a cross-sectional shape definition window, and creates a cross-sectional shape on the blank window while viewing a conceptual drawing or a drawing (not shown). Is
It is the cross-sectional shape created and defined in.

Indicates a state in which the dimension value of the cross-sectional shape defined by (such as arc, parallel constraint condition, parallel dimension, etc.) is input and defined, and completed. Shows the state defined by inputting the depth amount D (Depth: 100) of the cross-sectional shape defined in.

[0005] indicates that the three-dimensional shape is completed by extruding in the designated direction by the depth amount D of the sectional shape defined by.

[0006]

Conventionally, as shown in FIG.
Since the cross-sectional shape was defined and extruded from a blank state in accordance with the procedure shown in (3) and the three-dimensional shape was designed, the designer had to create the cross-sectional shape one by one by referring to the conceptual drawing and drawings not shown. However, there is a problem that it takes a very long time to create the cross-sectional shape.

The present invention solves these problems.
Display a conceptual drawing or drawing on the screen, copy or trace these to define the cross-sectional shape, define dimension values, constraint conditions, and depth amount and complete the three-dimensional shape based on these definitions. It is intended to realize the generation of a three-dimensional shape by importing drawings or drawings and simply and quickly defining the cross-sectional shape.

Further, the present invention completes a three-dimensional shape on the basis of elements and start points and end points which are designated on a drawing (for example, a side view), and the depth direction and amount can be easily defined. The purpose is to realize the generation of a three-dimensional shape.

[0009]

[Means for Solving the Problems] Means for solving the problems will be described with reference to FIG. In FIG. 1, a capture process 2 is to capture a conceptual drawing or drawing and display it on a screen.

The cross-sectional shape generation processing 4 is to generate and display a cross-sectional shape in response to an instruction to cut out a surface displayed on the screen (for example, an instruction to copy a conceptual drawing or drawing or tracing). .

The three-dimensional shape generation processing 5 generates a three-dimensional shape by extruding the cross-sectional shape in a designated direction in response to the input of the dimensions and constraint conditions of the generated cross-sectional shape and the input of the depth. A three-dimensional shape is generated by extruding based on an element designated on the drawing, an element and a length, a start point and an end point.

[0012]

According to the present invention, as shown in FIG.
Captures the conceptual drawing or drawing and displays it on the screen, and the cross-sectional shape generation process 4 responds to the cutout instruction of the surface displayed on the screen (for example, a copying instruction of the conceptual drawing or drawing or tracing), The shape is generated and displayed, and the three-dimensional shape generation processing 5 pushes out the cross-sectional shape in the designated direction in response to the input of the dimensions and constraint conditions of the generated cross-sectional shape and the input of the depth to display the three-dimensional shape. It is generated and displayed.

In addition, the capture processing 2 captures a conceptual drawing or drawing and displays it on a screen (for example, a front view), and the cross-sectional shape generation processing 4 instructs to cut out the surface displayed on the screen (for example, a conceptual drawing or a drawing). A cross-sectional shape is generated and displayed in response to a copying instruction or tracing, and the three-dimensional shape generation processing 5 inputs the dimensions and constraint conditions of the generated cross-sectional shape and the depth on the drawing (eg, side view). Corresponding to the designation of the element (or element and length, or start point and end point), the cross-sectional shape is the length of the element in the direction of the designated element (or the length of the numerical value specified in the direction of the element). , Or the length from the starting point to the ending point) is extruded in the direction from the starting point to the ending point, and a three-dimensional shape is generated and displayed.

Further, the cross-sectional shape generation processing 5 instructs, for the cross-sectional figure of the surface selected from the three-dimensional shape displayed on the screen, the cut-out instruction of the surface also displayed on the screen by the import processing 2 (for example, a concept). Corresponding to the drawing or drawing instruction of the drawing or tracing), the cross-sectional shape is added / corrected and displayed, and the three-dimensional shape generation processing 5 inputs the dimensions and constraint conditions of the generated cross-sectional shape and the depth. In response to the input or the designation of the depth on the drawing, the cross-sectional shape is extruded in the designated direction to generate and display the three-dimensional shape.

Therefore, a conceptual drawing or a drawing is displayed on the screen, and the sectional shape is defined by copying or tracing these, and the dimension value, the constraint condition, and the depth amount are defined, and the three-dimensional shape is based on these definitions. By completing the above, it becomes possible to capture a conceptual drawing or a drawing, quickly define a sectional shape, and generate a three-dimensional shape.

Further, the depth direction and amount can be easily defined by completing the three-dimensional shape based on the elements and the start point and the end point which are designated on the drawing (for example, the side view). It is possible to realize the generation of a three-dimensional shape.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction and operation of an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 shows a block diagram of an embodiment of the present invention.
In FIG. 1, a conceptual drawing / drawing 1 is a sketch 3
It is a conceptual drawing of a cross-sectional view of a three-dimensional shape and a drawing (design drawing) in which a three-dimensional shape is designed.

The capture processing 2 is a conceptual drawing created in advance /
The drawing 1 is captured and displayed on the screen 3. At this time, a grid is also displayed as shown on the screen 3 to facilitate the definition of the cross-sectional shape.

The screen 3 is a screen in which a cross-sectional shape definition window and the like are provided. The cross-sectional shape generation processing 4 is to generate and display a cross-sectional shape in response to a conceptual drawing displayed on the screen, a copying instruction of the drawing, or tracing.
Here, • Copying is performed: • Copying individual elements • Copying elements within closed areas • Copying elements within groups • Other copying.

-Stracing: -Strawing as a sketch, drawing a desired shape.

The three-dimensional shape generation processing 5 corresponds to input of dimensions (parallel dimensions, radius, etc.) and restraint conditions (parallel restraint conditions, reference restraint conditions, etc.) of the generated cross-sectional shape, and input of depth of the cross-sectional shape. Then, the cross-sectional shape is extruded in the designated direction to generate a three-dimensional shape.

Next, according to the order shown from to in FIG.
The operation of the configuration of FIG. 1 will be described in detail. In FIG.
Shows a state in which the previously created conceptual drawing / drawing 1 and the grid for facilitating the definition of the cross-sectional shape are captured by the processing 2 and displayed on the screen 3. Here, a cross-sectional shape definition window is provided on the screen 3, and the conceptual drawing / drawing 1 and grid etc. are loaded into this window and displayed as shown.

[0024] shows a state in which the graphic element displayed on the screen 3 is copied or the cross-sectional shape is defined by tracing the conceptual drawing / drawing. Here, a designer defines a cross-sectional shape by instructing and copying a circular arc in a conceptual drawing / drawing, tracing a line connecting the circular arcs, and connecting both by a line segment.

Is a dimension (parallel dimension, horizontal dimension, radius 1,
A radius 2 etc.) and constraint conditions (standard constraint conditions, parallel constraint conditions, etc.) are input and defined.

After defining the dimension of the cross-sectional shape and the constraint condition with, the depth amount D (Dept of the cross-sectional shape)
It shows how the definition is made by inputting h). Shows a state in which the depth amount D is extruded in a designated direction based on the cross-sectional shape and dimensions defined by the above, and the constraint condition, and a three-dimensional shape is generated and displayed.

As described above, a rough sketch conceptual diagram created in advance, a designed drawing, and a grid for easy definition are displayed and displayed on the screen 3 (), and the graphic elements of these conceptual diagrams and drawings are displayed on the screen 3. Define the cross-sectional shape by copying and tracing between graphic elements and graphic elements (). Then, enter the dimensions and constraint conditions of this cross-sectional shape to define (), and enter the amount of extrusion () to define the cross-sectional shape in the designated direction according to these definitions, and extrude the three-dimensional shape by the amount of extrusion. Generate (). With these, the designer can display the previously created conceptual drawing or drawing on the screen 3
You can easily create a cross-sectional shape by displaying it on the top and copying it,
It becomes possible to quickly design a three-dimensional shape based on the defined cross-sectional shape. The details will be sequentially described below.

FIG. 2 shows a flowchart for explaining the operation of the present invention. In FIG. 2, S1 activates the cross-sectional shape definition editor. This activates the cross-sectional shape definition editor that defines the cross-sectional shape from FIG. 1 already described.

A step S2 decides whether to use the conceptual drawing / drawing 1. In the case of YES, the conceptual drawing / drawing 1 is fetched in S3, displayed as shown in FIG. 1 on the screen 3, the sectional shape is defined in S4 (FIG. 4, FIG. 4), and the process proceeds to S5. On the other hand, in the case of NO, since the conceptual drawing / drawing 1 is not used, the designer draws the drawing to define the cross-sectional shape in S7, and proceeds to S5.

In step S5, the cross-sectional shape is determined by inputting the dimensions and the constraint conditions. This is defined by inputting dimensions: parallel dimensions, horizontal dimensions, radius 1, radius 2, constraint conditions: standard constraint conditions, parallel constraint conditions, as shown in Fig. 1.

In S6, the depth amount is specified and pushed out to perform 3
Create a dimensional shape. This is the depth amount (D
(Epth: 100) is specified, and the cross-sectional shape is extruded in the specified direction by the specified depth amount, and a three-dimensional shape is created and displayed as shown in FIG.

As described above, the cross sectional shape definition editor is started, the conceptual drawing / drawing 1 is displayed on the screen 3, and the cross sectional shape is defined by copying and tracing (FIG. 4, FIG. 4). The dimensions of the shape and the constraint conditions are input and defined (in FIG. 1). Then, the depth amount of these defined cross-sectional shapes is input and defined (FIG. 1), and the depth amount is extruded in the designated direction to create a three-dimensional shape (FIG. 1).
of). As a result, it is possible to display a conceptual drawing that is a rough sketch created in advance or a design drawing that has been designed in advance on the screen 3 and copy and trace these graphic elements to easily and quickly define the cross-sectional shape. It is possible to design the three-dimensional shape easily and quickly by defining the dimensions of the cross-sectional shape and constraint conditions, designating the depth amount and the extrusion direction.

FIG. 3 shows a flowchart for explaining the operation of the present invention (during creation (second time and thereafter)). This is a procedure when a three-dimensional shape is created according to the flowchart of FIG. 2 and a cross-sectional shape is defined and a three-dimensional shape is created using the created three-dimensional shape.

In FIG. 3, S11 displays the three-dimensional shape being created. For example, the three-dimensional shape being created in FIG. 1 is displayed on the screen 3. In S12, the surface is selected. This is to select a surface for which a cross-sectional shape is to be created from the three-dimensional shape displayed on the screen 3 in S11.

In step S13, it is determined whether the surface selected in step S12 is the definition surface. If YES, further conceptual drawing /
It is determined whether the drawing is used, and if YES, the process proceeds to S15, and if NO, the process proceeds to S19.

S15 is YES in S13 and YE in S14.
Since it was S (since it was found that the definition surface and the conceptual drawing / drawing were used), the conceptual drawing / drawing 1 is displayed on the screen 3 (taken into the cross-sectional shape definition editor).

In step S16, the cross sectional shape is defined (FIG. 4).
As will be described later, this is done by copying or tracing the graphic element of the conceptual drawing / drawing 1 displayed on the screen 3 in S15, and adding or modifying the sectional shape to create the defined sectional shape.

Similar to S5 and S6, S17 and S18 are defined by inputting the dimensions of the defined cross-sectional shape and constraint conditions, and then inputting and defining the depth amount, and only this depth amount is designated. 3D shape is created by extruding in the depth direction.

Further, in S19, if NO in S13 and not the definition surface, or if YES in S13 and NO in S14 and the definition surface is not used, the conceptual drawing / drawing is not used. Determine whether to use this definition. If YES, the process proceeds to S15. On the other hand, in the case of NO, the drawing is performed in S20 to define the cross-sectional shape, and the process proceeds to S17.

As described above, the three-dimensional shape being created is displayed on the screen 3, and the selected surface is the definition surface.
If a drawing is used or if it is not a definition surface, but this time a conceptual drawing / drawing is used, the conceptual drawing / drawing is displayed on the screen 3 and the cross-sectional shape is defined by copying or tracing the graphic element. Then, the depth amount of the defined cross-sectional shape is input and defined (Fig. 1), and the depth amount is extruded in the designated direction to create a three-dimensional shape (Fig. 1). With these, the cross-sectional shape can be defined easily and quickly by designating and tracing a graphic element from the conceptual drawing / drawing 1 by designating an arbitrary surface of the three-dimensional shape being created. It becomes possible to design the three-dimensional shape easily and quickly by defining the constraint condition and designating the depth amount and the pushing direction.

FIG. 4 is a flow chart for explaining the detailed operation of the present invention. This is S4 in FIG. 2 or S16 in FIG.
It is a procedure of defining the cross-sectional shape of the. In FIG. 4, S21
Starts defining the cross-sectional shape.

A step S22 decides whether to copy the conceptual drawing / drawing 1. In the case of YES, it is found that the graphic element of the conceptual drawing / drawing 1 is copied to define the sectional shape.
In 3, the conceptual drawing / graphic is copied (the graphic element, for example, the arc of FIG. 1 is copied) to draw a cross-sectional shape, and the process proceeds to S24. On the other hand, in the case of NO, it is found that tracing is performed without copying the conceptual drawing / drawing, so in S25, a cross-sectional shape is drawn by tracing an arbitrary graphic element on the conceptual drawing / drawing 1. For example, the cross-sectional shape is drawn by tracing the arcs described as "tracing" on the screen 3 of FIG.

In S24, it is determined whether the drawing is completed. Yes
In the case of, the series of copying of the cross-sectional shape and tracing are completed. If NO, the process returns to S22 and is repeated. As described above, the conceptual drawing / drawing 1 is displayed on the screen 3, and these graphic elements are copied or traced to define the sectional shape. As a result, it becomes possible to easily and quickly define the cross-sectional shape by copying and tracing.

FIG. 5 shows an example of geometric data of the present invention. FIG. 5A shows an example of geometric data (example of geometric data displayed on the screen 3 of FIG. 1). Here, the element (1) is the element (1) of the upper right circular arc on the screen 3 of FIG. 1, and has a start point (x1, y1) and an end point (x2, y).
2) and a radius r1. Similarly, element (3) is
It is an element (3) of the lower left circular arc on the screen 3 of FIG.
The start point (x5, y5), the end point (x6, y6), and the radius r2.

Grid (1) to grid (n) are
As shown by the dotted line on the screen 3 of FIG. 1, it is a reference line for facilitating the definition of the cross-sectional figure, and the center point (xc
1, yc1) and the direction vector (Δx1, Δy1).

Group (1) is a group of elements that make up a graphic in a conceptual drawing or drawing, and here, element (1), element (2), element (3), element (4), etc. It consists of

FIG. 5B shows an example of geometric data (an example of geometric data forming a defined sectional shape). In this example of geometric data, the elements, shapes, and values of the cross-sectional shape defined on the screen 3 of FIG. 1 are registered. Here, the cross-sectional shape is as shown in the figure: shape value: element (1): arc starting point (x1, y1), end point (x2, y2), radius r1 element (2): straight line starting point (x3, y3), End point (x4, y4) -Element (3): Arc Start point (x5, y5), End point (x6, y6), radius r2-Element (4): Straight line Start point (x7, y7), End point (x8, y8) From It is configured.

FIG. 6 shows an example of management data of dimensions and restraint conditions of the present invention. This is an example of management data for storing and managing the dimensions and constraint conditions defined on the screen 3 of FIG.・ Radius 1 element (1) ・ Horizontal dimension element (2) ・ ・ ・ ・ This defines dimension values etc. for the cross-sectional shape defined on the screen 3 of FIG. 1, and the radius 1 is It is the value of the radius of element (1) and the horizontal dimension is the value of element (2) in the horizontal direction.

Next, the configuration and operation of another embodiment of the present invention will be sequentially described in detail with reference to FIGS. 9 to 13.

FIG. 9 shows a block diagram of another embodiment of the present invention. Here, the conceptual drawing / drawing 1, the import processing 2, and the cross-sectional shape creation processing 4 are the same as those in the configuration of FIG. In FIG. 9, screen 3 is a screen in which a cross-sectional shape definition window and the like are provided. Here, in FIG.
,, correspond to ,,, in FIG. 1, and are different from FIG. 1 in that a front view window and a side view window are provided in ,.

In the three-dimensional shape generation processing 5, the dimensions (parallel dimension, radius, etc.) of the generated cross-sectional shape and constraint conditions (parallel constraint condition, vertical constraint condition, reference constraint condition, etc.) are input and drawings (for example, a side view). ) Corresponding to the designation of the element from above, the designation of the element and its length, or the designation of the start point and end point, the length of the element or the direction of the element is designated in the direction of the element designated in the drawing. Or the length from the start point to the end point in the direction from the start point to the end point,
It is to be extruded to generate a three-dimensional shape.

Next, according to the order shown in FIG.
The operation of the configuration of FIG. 9 will be described in detail. In FIG.
Shows a state in which the previously created conceptual drawing / drawing 1 and the grid for facilitating the definition of the cross-sectional shape are captured by the processing 2 and displayed on the screen 3 (here, since it is difficult to see the glitch, it is omitted, Actually, it is displayed as in FIG. 1). Here, a front view window and a side view window are provided as cross-sectional shape definition windows on the screen 3, and the conceptual drawing / drawing 1 and the grid are loaded into these windows and displayed as shown (grid is omitted). ).

Shows a state in which the graphic element displayed on the screen 3 is copied or the cross-sectional shape (front view and side view) is defined by tracing a conceptual drawing / drawing. Here, the designer instructs to copy a straight line or an arc in the conceptual drawing / drawing and copies it, or traces a line connecting the straight line or the arc to connect the two with a line segment, and thereby the cross-sectional shape (front view and front view). Side view) is defined.

In the state where the cross-sectional shape (front view and side view) is defined by copying and tracing with, constraint conditions (standard constraint condition, parallel constraint condition (1) to (3), vertical constraint condition (1) (3) etc.) and dimensions (parallel dimensions (1) to (4) etc.) are input and defined, and a state in which the sectional shape is completed is shown.

After defining the constraint conditions and cross-sectional shape dimensions with, specify the element (×) on the side view window.
The elements defined as () have the same length.
Is extruded by the length of the specified element in the direction of the specified element (extruded by the depth in the figure) based on the cross-sectional shape, constraint conditions, and dimensions defined by Show the situation.

As described above, the conceptual drawing of the rough sketch created in advance, the designed drawing, and the grid for easy definition are captured and displayed on the screen 3 (front view window and side view window) (), and on the screen 3 A cross-sectional shape (front view and side view) is defined by copying the graphic elements of these conceptual drawings and drawings and tracing between the graphic elements and the graphic elements (). Then, define the constraint conditions and dimensions of this cross-sectional shape (for example, front view window) by defining (), specify the element from the side view window and enter the extrusion amount (), and define the cross-sectional shape according to these definitions. A three-dimensional shape is generated by extruding in the direction of the designated element by the amount of extrusion of the length of the element (). As a result, the designer displays a front view and a side view of a conceptual drawing or drawing created in advance on the screen 3 and copies or traces them to obtain a sectional shape (front view,
Side view) is simply created, and based on the defined cross-sectional shape (front view, side view), here, the element length is extruded in the direction of the element specified on the side view, and the three-dimensional shape It is possible to quickly design.

FIG. 10 shows an example (when inputting) of geometric data of the present invention. FIG. 10A shows an example of geometric data displayed on the front view window of the screen 3 of FIG. Here, the elements (1) to (6) are the elements (1) to (6) of the line segment of the three-dimensional shape on the front view window of the screen 3 of FIG. For example, the element (1) has a start point (x11,
y11) and the end point (x12, y12). Similarly, the elements (2) to (6) are represented by a set of a start point and an end point as shown in the figure.

Grid (1) to grid (n) are
Although it is not displayed on the screen 3 of FIG. 9 for the sake of clarity, it is a reference line for facilitating the definition of the cross-sectional figure, as shown by the dotted line on the corresponding screen 3 of FIG. Point (xc1, yc1), direction vector (Δx
1, Δy1) etc. (FIG. 9)
In the case of, it is defined by a straight grid).

Group (1) is a group of elements that make up a graphic in a conceptual drawing or drawing, and here, element (1), element (2), element (3), element (4), It is composed of an element (5), an element (6), and the like.

FIG. 10B shows an example of geometric data displayed on the side view window of the screen 3 of FIG. Here, the elements (7) to (11), the grids (1) to (n), and the group (l) are the same as those in (a) of FIG.

FIG. 11 shows an example (after definition) of geometric data of the present invention. FIG. 11A shows an example of geometric data after being defined on the front view window of the screen 3 of FIG. 9 (example of geometric data of FIG. 9). This is an example of geometric data after defining each element of the front view so as to be displayed on the front view window of the screen 3 of FIG. 9, and here, from each element (1) of the front view to the element It is defined by the group of (6).

FIG. 11B shows an example of geometric data after being defined on the front view window of the screen 3 of FIG. 9 (example of geometric data of FIG. 9). Here, it is the same as that before the definition of FIG. As in the case of the front view of FIG. 11A, each element may be defined and only the elements (7) to (11) may be defined.

FIG. 12 shows an example of geometric data (after three-dimensionalization) according to the present invention. This is because horizontal geometric constraints (1) to (3), vertical geometric constraints (1) to (3), reference constraint conditions, and parallel dimensions (1) to (4) on the front view window of screen 3 in FIG. ) Is designated, then the element (7) is designated on the side view window, and the geometrical data is generated when the three-dimensional shape is generated by extruding the element (7) by the length in the direction of the length of the element (7). Here, the calculation of the depth amount to be extruded will be described in detail.

(1) When the depth amount D described above with reference to FIGS. 1 to 6 is designated: In this case: When the designated value = len, the designated value = len is used as the depth amount.

(2) When an element is designated on the side view window: In this case: If the element (7) is designated on the side window of screen 3 in FIG. 9, len = √ (( ^{x72-x71) 2 + (y72} -y71) 2) ( 1) where the start point coordinates (x71, y71) end point coordinates (x72, y72) the depth of the element (7).

(3) When start point coordinates and end point coordinates are designated on the side view window: In this case, the start point coordinates (x
1, y1) and the end point coordinates (x2, y2) are designated, len = √ ((x2-x1) ² + (y2-y1) ² ) (Equation 2) is set as the depth amount.

FIG. 13 shows an example of management data of dimensions / geometrical constraints of the present invention. This is based on horizontal geometric constraints (1) to (3), vertical geometric constraints (1) to (3), reference constraint conditions, and parallel dimension (1) defined on the front view window of the screen of FIG. (4) and data that collectively manages the elements defined on the side window of the screen of FIG. 9 and the depth amount len calculated from the start point and the end point.

[0068]

As described above, according to the present invention,
Display a conceptual drawing or drawing on the screen, copy or trace these to define the cross-sectional shape, define dimension values and constraint conditions, and also define the depth amount or element (or element and length, or start point) on the side view, etc. And the end point) are used to define the depth amount, and a three-dimensional shape is created based on these definitions. Therefore, a conceptual drawing or drawing can be imported to quickly define the cross-sectional shape. It is possible to complete a three-dimensional shape, and moreover, it is possible to easily specify the depth amount by specifying elements, start points and end points on a side view or the like. As a result, the cross-sectional shape is designed by utilizing (copying or tracing) the graphic displayed on the screen of the display, so that the cross-sectional shape can be designed accurately and quickly.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the present invention (when newly created).

FIG. 3 is a flowchart for explaining the operation of the present invention (during creation)
Is.

FIG. 4 is a detailed operation flowchart of the present invention.

FIG. 5 is an example of geometric data of the present invention.

FIG. 6 is an example of management data of dimensions and restraint conditions of the present invention.

FIG. 7 is an explanatory diagram (1) of a conventional technique.

FIG. 8 is an explanatory diagram (part 2) of the conventional technique.

FIG. 9 is a configuration diagram of another embodiment of the present invention.

FIG. 10 is an example (when inputting) of geometric data of the present invention.

FIG. 11 is an example of geometric data (after definition) of the present invention.

FIG. 12 is an example of geometric data (after three-dimensionalization) according to the present invention.

FIG. 13 is an example of management data of dimensional / geometrical constraints of the present invention.

[Explanation of symbols]

 1: Conceptual drawing / drawing 2: Import processing 3: Screen 4: Cross-sectional shape generation processing 5: Three-dimensional shape generation processing

Claims (4)

[Claims] 1. A cross-sectional shape generation for generating and displaying a cross-sectional shape in response to an import process (2) for importing a conceptual drawing or drawing and displaying the same on a screen and an instruction for cutting out a surface displayed on the screen. The process (4) and the three-dimensional shape generation process (5) of generating the three-dimensional shape by extruding the cross-sectional shape in the designated direction in response to the input of the dimensions and constraint conditions of the generated cross-sectional shape and the input of the depth. )
And a three-dimensional shape generation system. 2. A cross-sectional shape generation for generating and displaying a cross-sectional shape in response to an import process (2) for capturing a conceptual drawing or drawing and displaying the same on a screen and an instruction for cutting out a surface displayed on the screen. Corresponding to the process (4), input of dimensions and constraint conditions of the generated cross-sectional shape, and designation of the element (or element and length, or start point and end point) to be the depth on the drawing, the cross-sectional shape is instructed. 3D that extrudes the length of the element in the direction of the element (or the length of the numerical value specified in the direction of the element, or the length of the start point to the end point in the direction from the start point to the end point) to generate a three-dimensional shape A three-dimensional shape generation system comprising: a shape generation process (5). 3. The dimensions of the cross-sectional shape and constraint conditions are input on one of the six views, and elements are specified on the other drawings or elements and their lengths are specified or the starting point of the depth amount is specified. The three-dimensional shape generation system according to claim 2, wherein the depth amount for pushing out the cross-sectional shape is calculated corresponding to the designation of the end point. 4. The three-dimensional shape generation system according to claim 1, further comprising an additional correction unit for modifying the sectional shape generated by the sectional shape generation processing (4).