JPH0877228A - Graphic processor - Google Patents

Abstract

PURPOSE: To provide the graphic processor which gives a depth feeling to an operator to enable visual position recognition in a three-dimensional space, and can be improved in operation efficiency. CONSTITUTION: The graphic processor consists of a central processing unit 1, a display device 2, an input device 3, a main storage device 4 which stores a program, etc., and a secondary storage device 5 which stores inputted figures, etc. A focus function consists of a focus position information management part 6 which has focus position information, a view direction information management part 7 which has information on a view direction, an illuminance calculation part 8 which finds illuminance by elements at the time of shading, a vignetting arithmetic part 9 which calculates the vignetting width of a body, and a vignetting illuminance calculation part 10 which calculates illuminance for a vignetting; and the vignetting is performed at the time of the shading processing to give the operator a depth feeling, and thus the visual position recognition in a three-dimensional space is enabled to improve the operation efficiency of a CAD system.

Description

Detailed Description of the Invention

[0001]

The present invention is particularly applicable to CAD (Comp
The present invention relates to a graphic processing device such as a uter Aided Design system.

[0002]

2. Description of the Related Art In recent years, with the design of complicated shapes, CAD
Has spread, and in the three-dimensional graphics system, the operability of the CAD system itself has been demonstrated with respect to the function for the three-dimensional model.

A worker advances a design by creating an object in a three-dimensional space in a three-dimensional graphics system. The shape of an object such as a wire frame model, a surface model, or a solid model in a three-dimensional space during design work can be discriminated by using shading processing. However, when an operator looks at an object arranged in a three-dimensional space in a wire frame state, it is difficult to visually recognize the positional relationship in the depth direction. Also, when the position information in the depth direction is needed in the operation process, or when you want to select a plane that is currently being worked, that is, an element that is not on the so-called work plane, you can actually enter the coordinates by checking the coordinates. Work such as making changes before the operation was required, which reduced the efficiency of drawing editing. The conventional image processing apparatus will be described below.

FIG. 6 is a block diagram of a conventional graphic processing apparatus. In FIG. 6, 1 is a central processing unit for processing requested information, 2 is a display device for displaying windows, graphic elements, characters, etc., 3 is a keyboard, tablet, mouse, etc. for inputting data such as characters, numerical values, and positions. Input device, 4
Is a main storage device for storing running programs such as an operating system and a window system. A secondary storage device 5 includes a view direction information management unit 7 having information on a view direction from which direction an operator views each element in a three-dimensional space, and a brightness of each element during shading. The brightness calculation unit 8 is provided.

FIG. 7 is a processing flowchart in the conventional graphic processing apparatus. First, reference is made to view direction information indicating from which direction the drawing elements arranged in the three-dimensional space are viewed (STEP 1). Next, the brightness calculation unit 8 calculates the brightness with respect to the element visible from the view direction with respect to the shading light source for each drawing element and performs color interpolation between the elements (STEP 2). Next, shading drawing processing from a predetermined light source is performed (STEP 3).

As described above, in the conventional shading, the reference point is one point of the light source, so that the three-dimensional shape of one element can be confirmed in the color arrangement state after the shading processing. However, when this process is performed on some elements, it is difficult to confirm the relative positional relationship in the depth direction between each element, and to see the positional relationship, change the view direction. I was forced.

Regarding the confirmation of the position in the depth direction, even if it is possible to change the position in the view direction, if the coordinates are necessary or if the drawing element arranged at that position is selected, It was necessary to confirm the position and move the work plane selectable with the mouse to the position.

[0008]

In the above conventional method,
Although it is effective for confirming the shape of a single drawing element, many complicated shapes are placed in drawings created in design drawings, etc. It is necessary to clarify the positional relationship of each element in the depth direction in order to visually confirm such a configuration, and conventional shading processing was not sufficient. Further, the position designation in the depth direction requires the element selection and the coordinate input for moving the work plane before the position designation, which causes a problem that the work efficiency of the drawing edit is low.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a graphic processing apparatus that gives a worker a sense of depth and enables visual position recognition in a three-dimensional space to improve work efficiency.

[0010]

To this end, the graphic processing apparatus of the present invention uses a predetermined focus position as a reference when performing shading processing on an object arranged in a three-dimensional space. The object has a function of visually blurring the position recognition in the depth direction by blurring the object depending on the distance.

[0011]

With the above arrangement, the operator can visually confirm the positional relationship in the depth direction, and the reference plane is moved by an input device such as a mouse, so that the Z-axis direction can be designated by a mouse or the like. It is possible depending on the device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a graphic processing apparatus according to an embodiment of the present invention. This graphic processing device includes a central processing unit 1, a display device 2, an input device 3 for inputting characters and numerical values, a main storage device 4 for storing a program being executed, an input graphic, etc. Is configured by the secondary storage device 5. Further, the focus function includes a focus position information management unit 6 having focus information, a view direction information management unit 7 having view direction information, a brightness calculation unit 8 for obtaining brightness for each element during shading, and a blurring coefficient input by an operator. It is composed of a blurring processing calculation unit 9 for calculating a blurring width of an object by using, and a blurring processing brightness calculation unit 10 for calculating a brightness for performing a blurring process.

FIG. 2 is a flow chart of the graphic processing apparatus in one embodiment of the present invention. The focus function for performing blurring processing in the depth direction from the reference plane, that is, the focus position will be described below. First, the element placed in the three-dimensional space by the operator has position information of three-dimensional coordinates (STEP 11). FIG. 3 is a diagram showing a drawing example of the blurring process according to the embodiment of the present invention, and shows how an object subjected to the blurring process actually looks.

The operator sets the blurring coefficient and the upper limit value MAX of the blurring width in order to specify the blurring width when the blurring process is performed on the element (STEP 12). FIG. 4 is a diagram showing the relationship between the characteristic of the blurring coefficient, the focus position, the blurring width, and the upper limit value MAX of the blurring width in one embodiment of the present invention. Blur factor,
It is a figure showing the relation of the upper limit MAX of the blurring width. When the blurring process is performed on the same object, if the blurring coefficient is increased, the length of the width that is actually blurred changes more greatly with respect to the difference in the position in the Z-axis direction. When the blur width reaches the upper limit MAX of the blur width specified by the operator,
All the elements existing in the Z direction from that position are blurred with the upper limit value of the blur width.

Next, the view direction information indicating from which direction the worker is looking at the object arranged in the three-dimensional space is referred to (STEP 13). Next, the focus position and reference plane are determined by the focus position movement function linked to the mouse (STE
P14), the focus position information is obtained by this focus position designation (STEP 15).

Next, using the predetermined coordinates of the light source and the view direction information, the brightness calculation associated with the existing shading processing is performed (STEP 16). Next, using the blurring coefficient input by the operator, the upper limit MAX of the blurring width, and the focus position information that has been set, the coordinates of the portion where the blur is actually applied to the object are calculated (STEP 17). Next, referring to the brightness calculation result performed in STEP 16 and the coordinate information of the blurred portion in STEP 17, coordinate calculation for correcting the color interpolation is performed (ST
EP18). Next, shading drawing processing is performed according to the final result calculated in STEP 18 (STEP 1
9).

Next, with respect to the object subjected to the above processing,
The process of obtaining position information in the depth direction with a mouse will be described with reference to FIGS. 4B, 4C, and 5. FIG. 5 is a diagram showing a focus position function of a mouse in one embodiment of the present invention.

The reference plane, that is, the portion that is blurred as the focal point moves is shown in FIGS. 4B to 4C.
It changes like. If the depth direction is the Z direction as shown in FIG. 5A for the function of moving the focus position, a button for moving the focus position in the −Z direction and a button for moving the focus position in the + Z direction are arranged on the mouse. The operator can visually confirm that the blurred portion is changed by these two buttons, and in the depth direction of the portion where the blurred portion disappears, the mouse moves to the Z coordinate of the element where the blurred portion disappears. Therefore, in addition to the two-dimensional designation with the mouse, the position in the depth direction can be designated.

This function will be specifically described with reference to FIG. Now, it is assumed that the boxes are arranged in the three-dimensional space, and the planes α and β, which are the components thereof, are located at the Z coordinates A and B, respectively. When the focus position is at A, the object is blurred from the plane α to the plane β.
Move the focus position in the + Z direction with the mouse button,
The focus position when the blur of the plane β disappears is the Z-axis coordinate B.
Therefore, the position information of the plane β located on the Z-axis coordinate B can be obtained by the mouse.

[0020]

As described above, according to the present invention, the blurring process is performed on the object arranged in the three-dimensional space with the focus position determined by the operator as a reference, so that the three-dimensional positional relationship can be visually recognized. In addition, by providing an input device such as a mouse with a focus movement function, position information in the depth direction can be obtained by the input device, and thus work efficiency during drawing editing is significantly improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a graphic processing device according to an embodiment of the present invention.

FIG. 2 is a processing flowchart of a graphic processing apparatus according to an embodiment of the present invention.

FIG. 3 is a diagram showing a drawing example of blurring processing according to an embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between a characteristic of a blurring coefficient, a focus position, a blurring width, and an upper limit value MAX of the blurring width according to an embodiment of the present invention.

FIG. 5 is a diagram showing a focus position function of a mouse in one embodiment of the present invention.

FIG. 6 is a block diagram of a conventional graphic processing device.

FIG. 7 is a processing flowchart in a conventional graphic processing apparatus.

[Explanation of symbols]

 1 Central Processing Unit 2 Display Device 3 Input Device 4 Main Storage Device 5 Secondary Storage Device 6 Focus Position Information Management Unit 7 View Direction Information Management Unit 8 Luminance Calculation Unit 9 Blur Processing Computation Unit 10 Blur Processing Luminance Calculation Unit

Claims (3)

[Claims] 1. A central processing unit for processing requested information, a display device for displaying windows, graphic elements, characters and the like, an input device for inputting data such as characters, numerical values and positions, and a program being executed. A graphic processing device including a main storage device for storing a shape, a secondary storage device for storing a shape database, a storage area, and the like, and performing shading processing on an object arranged in a three-dimensional space. In this case, the figure processing device has a function of blurring an object according to a distance from the predetermined focus position as a reference and visually giving a worker position recognition in the depth direction. 2. A mouse, which is an input device of a CAD system, has an operation function of moving a reference plane of a focus position in a depth direction while the function is applied to an object in a three-dimensional space. Select an object that is not on the work plane by moving the reference plane with the mouse and recognizing the position where the blur disappears. The graphic processing apparatus according to claim 1, wherein the Z-direction position can be designated. 3. The blur width can be reduced by designating the upper limit value of the blur width with respect to the blur width proportional to the distance in the depth direction when the function is applied to an object in a three-dimensional space. 2. The graphic processing apparatus according to claim 1, wherein all the elements existing in the depth direction from the position where the upper limit value is reached have a function of blurring at the upper limit value of the blur width.