Graphics rendering and editing apparatus and method

• US 9,235,910 B2
• Filed: 04/06/2009
• Issued: 01/12/2016
• Est. Priority Date: 04/08/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Iijima, Tadahiko, Sato, Noriaki
• Primary Examiner(s): Zimmerman, Mark
• Assistant Examiner(s): Chin, Michelle
• Application Number:
  US12/419,109
• Publication Number:
  US 20090251489A1
• Time in Patent Office: 2,472 Days
• US Class Current: 1/1
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T

Abstract

A graphics rendering and editing apparatus includes a rendering unit configured to render a graphic object, a position specifying unit configured to specify a pre-change position and a post-change position of an arbitrary point on the graphic object, an attribute specifying unit configured to specify a deformation attribute of the graphic object, the deformation attribute being related to how the graphic object is deformed as a position of the arbitrary point changes, and a deformation unit configured to deform, when the position specifying unit has specified the pre-change position and the post-change position the graphic object in accordance with the pre-change position, the post-change position, and the attribute specified by the attribute specifying unit.

Claims

1. A graphics editing apparatus, comprising:

a memory;

a processor coupled to the memory which executes the following;

drawing a straight line segment by designating a start point and an endpoint, edges of the straight line segment being at the start point and the end point;

setting, based on an operation of a pointer, points on the straight line segment as a first fixed point and a second fixed point to divide the straight line segment into three parts;

deforming the straight line segment by moving a control point which is on the straight line segment and is between the first fixed point and the second fixed point, to a position pointed by the pointer in such a way that a part of the straight the line segment which is between the first fixed point and the second fixed point is deformed to be a curved line by the moving of the control point which is between the first fixed point and the second fixed point and the other parts of the straight line segment which are not between the first fixed point and the second fixed point are not deformed by the moving of the control point which is between the first fixed point and the second fixed point; and

inputting information about sharpness of the straight line segment after being deformed,

wherein the straight line segment is deformed so that a shape of the straight line segment deformed in response to the moving of the control point is sharper when the information about the sharpness corresponds to sharpness which is a threshold value or larger, compared to when the information of the sharpness corresponds to sharpness which is less than the threshold value.

2. The graphics editing apparatus according to claim 1, further comprising inputting information about viscosity of the straight line segment,

wherein the straight line segment is deformed so that a larger part of the straight line segment which is between the first fixed point and the second fixed point is deformed in response to the moving of the control point when the information about the viscosity corresponds to viscosity which is a threshold value or larger, compared to when the information of the viscosity corresponds to viscosity which is less than the threshold value.

3. The graphics editing apparatus according to claim 2, further comprising obtaining information about a speed of the moving of the control point for deforming the straight line segment,

wherein the information about the speed obtained is inputted as the information about the viscosity.

4. The graphics editing apparatus according to claim 1, wherein a deformation amount is determined corresponding to each position on the straight line segment, based on a distance from the control point to the position of the control point after being moved by the pointer, and on respective distances from the first fixed point and the second fixed point to the position of the control point after being moved by the pointer.

5. A method for editing graphics, the method comprising:

drawing a straight line segment by designating a start point and an end point, edges of the straight line segment being at the start point and the end point;

setting, based on an operation of a pointer, points on the straight line segment as a first fixed point and a second fixed point to divide the straight line segment into three parts;

deforming the straight line segment by moving a control point which is on the straight line segment and is between the first fixed point and the second fixed point, to a position pointed by the pointer in such a way that a part of the straight line segment which is between the first fixed point and the second fixed point is deformed to be a curved line by the moving of the control point which is between the first fixed point and the second fixed point and the other parts of the straight line segment which are not between the first fixed point and the second fixed point are not deformed by the moving of the control point which is between the first fixed point and the second fixed point; and

inputting information about viscosity of the straight line segment,

wherein the straight line segment is deformed so that a larger part of the straight line segment which is between the first fixed point and the second fixed point is deformed in response to the moving of the control point when the information about the viscosity corresponds to viscosity which is a threshold value or larger, compared to when the information of the viscosity corresponds to viscosity which is less than the threshold value.

6. The method according to claim 5, further comprising inputting information about sharpness of the straight line segment after being deformed,

wherein the straight line segment is deformed so that a shape of the straight line segment deformed in response to the moving of the control point is sharper when the information about the sharpness corresponds to sharpness which is a threshold value or larger, compared to when the information of the sharpness corresponds to sharpness which is less than the threshold value.

7. The method according to claim 5, further comprising obtaining information about a speed of the moving of the control point for deforming the straight line segment,

wherein the obtained information about the speed is input as the information about the viscosity.

8. The method according to claim 5, wherein, in the deforming, a deformation amount corresponding to each position on the straight line segment is determined based on a distance from the control point to the position of the control point after being moved by the pointer, and on respective distances from the first fixed point and the second fixed point to the position of the control point after being moved by the pointer.

9. A non-transitory computer-readable storage medium storing a program that causes a computer to execute a method for editing graphics, the method comprising:

drawing a straight line segment by designating a start point and an end point, edges of the straight line segment being at the start point and the end point;

setting, based on an operation of a pointer, points on the straight line segment as a first fixed point and a second fixed point to divide the straight line segment into three parts; and

deforming the straight line segment by moving a control point which is on the straight line segment and is between the first fixed point and the second fixed point, to a position pointed by the pointer in such a way that a part of the straight line segment which is between the first fixed point and the second fixed point is deformed to be a curved line by the moving of the control point which is between the first fixed point and the second fixed point and the parts of the straight line segment which are not between the first fixed point and the second fixed point are not deformed by the moving of the control point which is between the first fixed point and the second fixed point,

wherein the method further comprises inputting information about viscosity of the straight line segment, and

wherein the straight line segment is deformed so that a larger part of the straight line segment which is between the first fixed point and the second fixed point is deformed in response to the moving of the control point when the information about the viscosity corresponds to viscosity which is a threshold value or larger, compared to when the information of the viscosity corresponds to viscosity which is less than the threshold value.

10. The non-transitory computer-readable storage medium according to claim 9, wherein the method further comprises inputting information about sharpness of the straight line segment after being deformed, and

wherein the straight line segment is deformed so that a shape of the straight line segment deformed in response to the moving of the control point is sharper when the information about the sharpness corresponds to sharpness which is a threshold value or larger, compared to when the information of the sharpness corresponds to sharpness which is less than the threshold value.

11. The non-transitory computer-readable storage medium according to claim 9, wherein the method further comprises obtaining information about a speed of the moving of the control point for deforming the straight line segment, and

wherein the obtained information about the speed is input as the information about the viscosity.

12. The non-transitory computer-readable storage medium according to claim 9, wherein, in the deforming, a deformation amount corresponding to each position on the straight line segment is determined based on a distance from the control point to the position of the control point after being moved by the pointer, and on respective distances from the first fixed point and the second fixed point to the position of the control point after being moved by the pointer.