CN104238921A - Custom polygon drawing method and device - Google Patents
Custom polygon drawing method and device Download PDFInfo
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- CN104238921A CN104238921A CN201310253303.XA CN201310253303A CN104238921A CN 104238921 A CN104238921 A CN 104238921A CN 201310253303 A CN201310253303 A CN 201310253303A CN 104238921 A CN104238921 A CN 104238921A
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- selected point
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Abstract
Disclosed is a custom polygon drawing method and device. The method includes the steps of reading an arbitrary polygon, and moving a point at any side of the polygon; recognizing a move location of the selected point; drawing a new polygon according to an end location of the selected point. The device comprises a display unit, an analytical unit and a drawing unit; the display unit is used for reading and displaying the arbitrary polygon; the analytical unit is used for recognizing a moving path of the selected point and recording an end location of each move, thus forming a set of ordered points with other vertexes; the drawing unit is connected with the display unit and the analytical unit and is used for drawing the polygons according to the sequence of the points in the set. The custom polygon drawing method and device has the advantage that a user can optionally modify existing polygons into custom polygons.
Description
Technical field
The invention relates to computer drawing technology, particularly relate to the method and apparatus of self-defined polygonal drafting.
Background technology
Along with computer drawing technology is in the widespread use of industry-by-industry, the demand that can customize graphics shape also increases day by day.In common graphic system, the polygonal shape as the rule such as triangle, square is often supplied to user's unrestricted choice in the mode of graphical control, but user-defined irregular polygon then often needs to draw voluntarily.Common polygon rendering method is generally the mode with broken line, and line-by-line is drawn.Its shortcoming is, whenever the self-defined a kind of polygon of needs, all will start from scratch and draw, and when being subject to certain factor and hang up in the continuous line drawing process of user, then current polygon draws task also failure thereupon.
Summary of the invention
The present invention proposes a kind of self-defined polygonal method for drafting and device, can based on basic polygon, by the flexible amendment to its limit, to obtain user-defined arbitrary polygon, thus simplify when user has the tedious steps that must repaint during difformity polygon rendering demand.
Main technical schemes of the present invention is:
A kind of self-defined polygonal method for drafting, comprising:
Read arbitrary polygon, any limit is chosen a bit, this selected point mobile;
Identify the shift position of selected point;
Carry out drawing new polygon according to the drop point site of selected point.
Preferably, described selected point comprises: selected point be place original limit on any point except two end points.
Preferably, the shift position of described identification selected point comprises: move each time and all identify as the drop point site of selected point.
Preferably, the described drop point site according to selected point is carried out drafting and is comprised: two endpoint locations on the original limit at selected point place and the invariant position on other limits, and the original limit at selected point place becomes the new limit of two of being connected by selected point.
Preferably, described method for drafting is realized by mouse on a personal computer.
Preferably, described method for drafting is realized by touch control manner on touch panel device.
A kind of self-defined polygonal drawing apparatus, comprising:
Display unit, reads and shows arbitrary polygon;
Resolution unit, for identifying the motion track of selected point, and the drop point site of record movement each time, form the set of orderly point with other summits;
Drawing unit, is connected with display unit and resolution unit, for carrying out polygon rendering according to the order of each point in set.
Preferably, described self-defined polygon rendering device, it is characterized in that, polygonal each vertex correspondence two-dimensional coordinate (x in described resolution unit, y), polygon is regarded as the coordinate set on multiple summit, often newly increase two connected limits, in set, namely increase the coordinate of new point.
Preferably, described device has mouse and draws for user.
Preferably, described device has touch-screen and draws for user.
Because the present invention is based on existing polygon, by transforming its limit thus obtaining self-defining polygon, without the need to drafting of starting from scratch, be therefore easy to operation, improve drawing efficiency.In addition, compared with prior art, the present invention is in self-defined polygonal process, and the continuity not by drawing locus affects, and user can transform repeatedly to the figure drawn, and can not make drawing tasks failure because of operation disruption.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of polygon rendering method provided by the invention;
Fig. 2 is the schematic diagram of polygon rendering device provided by the invention;
Process flow diagram when parsing module runs when Fig. 3 is drafting polygon provided by the invention;
Fig. 4 draws polygonal operation chart in one embodiment of the invention.
Embodiment
The invention provides a kind of self-defined polygonal method for drafting and device.
Shown in Figure 1, self-defined polygonal method for drafting provided by the invention mainly comprises following step:
In step 101, user selects an existing polygon;
In step 102, user chooses a bit on any limit, and moves;
In step 103, identify the drop point site in selected point moving process, in 104 steps, by two end points on original for selected point place limit and the drop point site line of selected point;
In step 105, user determines whether drawing is complete, draws, then return step 102 if need continue; Otherwise, terminate to draw.
Shown in Figure 2, self-defined polygonal drawing apparatus provided by the invention mainly comprises:
Display unit 201, for display graphics information;
Resolution unit 202, for receiving the polygon essential information and selected point motion track that display unit imports into, record selected point drop point site, forms new polygon information by computing.
Drawing unit 203, is connected with resolution unit, and the polygon information according to importing into is drawn; Be connected with display unit, polygon is shown to user.
Fig. 3 is the calculating process process flow diagram of resolution unit 202 in above-described embodiment, comprises the steps:
In step 301, obtain the basic polygon information that user selects, with point coordinate set
Z{V
1(x
1, y
1), V
2(x
2, y
2), V
3(x
3, y
3) ..., V
n(x
n, y
n) store, every two adjacent some expression limit, such as E
1(V
1, V
2);
In step 302, judge whether that selected point information is imported into, if having, performed step 303; Otherwise, perform step 305;
In step 303, if P is above-mentioned limit E
1a upper selected point, identifies the motion track of P, its drop point site is labeled as V
n+1(x
n+1, y
n+1);
In step 304, by the V in step 303
n+1(x
n+1, y
n+1) add in coordinate set Z, namely
Z{V
1(x
1，y
1)，V
n+1(x
n+1，y
n+1)，V
2(x
2，y
2)，V
3(x
3，y
3)，…，V
n(x
n，y
n)}；
In step 305, by the coordinate line in order of each point in coordinate set Z, be depicted as polygon.
Figure 4 shows that self-defined polygonal operation chart in one embodiment of the invention.In the present embodiment, the equipment that realizes of the method is personal computer, and plotting mode is mouse action.Should recognize that the present invention is not limited to the said equipment and instrument, also can be touch-screen mobile phone, panel computer, server or other can carry out the equipment of picture drafting, mode of operation can be finger touch or other can the instrument of graphing.
Triangle in subgraph 401 is the basic polygon selected in the present embodiment, at limit (V
1, V
3) on choose 1 P
1move to the right, form the quadrilateral shown in subgraph 402, selected point P
1be converted into summit V
4.In like manner, at limit (V
3, V
4) on choose arbitrarily 1 P
2, at limit (V
1, V
2) on choose arbitrarily 1 P
3, move P respectively
2, P
3, then the heptagon shown in subgraph 403 is formed.
It should be noted that, the moving range of selected point is the visible arbitrary region of graphical interfaces.As in subgraph 404,405, V
4', V
4" be respectively P
4, P
5the summit formed after mobile.
The above, be only the present invention's preferably embodiment, to those skilled in the art, any do not depart from the present invention design prerequisite under, the some distortion made and improvement, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a self-defined polygonal method for drafting, is characterized in that, comprise the following steps:
Read arbitrary polygon, any limit is chosen a bit, this selected point mobile;
Identify the shift position of selected point;
New polygon is drawn according to the drop point site of selected point.
2. method according to claim 1, is characterized in that, described selected point comprises:
Selected point be place original limit on any point except two end points.
3. method according to claim 1, is characterized in that, the shift position of described identification selected point comprises:
Move each time and all identify as the drop point site of selected point.
4. method according to claim 1, is characterized in that, the described drop point site according to selected point is drawn polygon and comprised:
Two endpoint locations on the original limit at selected point place and the invariant position on other limits, the original limit at selected point place becomes the new limit of two of being connected by selected point.
5. method according to any one of claim 1 to 4, is characterized in that, described method for drafting is realized by mouse on a personal computer.
6. method according to any one of claim 1 to 4, is characterized in that, described method for drafting is realized by touch control manner on touch panel device.
7. a self-defined polygonal drawing apparatus, is characterized in that, comprising:
Display unit, reads and shows arbitrary polygon;
Resolution unit, for identifying the motion track of selected point, and the drop point site of record movement each time, form the set of orderly point with other summits;
Drawing unit, is connected with display unit and resolution unit, for carrying out polygon rendering according to the order of each point in set.
8. self-defined polygon rendering device according to claim 7, it is characterized in that, polygonal each vertex correspondence two-dimensional coordinate (x in described resolution unit, y), polygon is regarded as the coordinate set on multiple summit, often newly increase two connected limits, in set, namely increase the coordinate of new point.
9. the device according to claim 7 or 8, is characterized in that, described device has mouse and draws for user.
10. the device according to claim 7 or 8, is characterized in that, described device has touch-screen and draws for user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310253303.XA CN104238921A (en) | 2013-06-21 | 2013-06-21 | Custom polygon drawing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310253303.XA CN104238921A (en) | 2013-06-21 | 2013-06-21 | Custom polygon drawing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104238921A true CN104238921A (en) | 2014-12-24 |
Family
ID=52227104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310253303.XA Pending CN104238921A (en) | 2013-06-21 | 2013-06-21 | Custom polygon drawing method and device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104238921A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107977495A (en) * | 2017-11-21 | 2018-05-01 | 王征 | A kind of system and method for the wall polygon rendering based on operation point probe |
| WO2019000692A1 (en) * | 2017-06-27 | 2019-01-03 | 广州视源电子科技股份有限公司 | Three-dimensional graphic rendering method, apparatus, device, and storage medium |
| CN111782111A (en) * | 2019-04-04 | 2020-10-16 | 广州高新兴机器人有限公司 | Method for drawing polygon on touch screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019000692A1 (en) * | 2017-06-27 | 2019-01-03 | 广州视源电子科技股份有限公司 | Three-dimensional graphic rendering method, apparatus, device, and storage medium |
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| CN107977495B (en) * | 2017-11-21 | 2021-04-02 | 王征 | System and method for drawing wall polygon based on operating point detector |
| CN111782111A (en) * | 2019-04-04 | 2020-10-16 | 广州高新兴机器人有限公司 | Method for drawing polygon on touch screen |
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