CN102752515A - Implementation method of flame effect at programmable stage in graphics rendering - Google Patents
Implementation method of flame effect at programmable stage in graphics rendering Download PDFInfo
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- CN102752515A CN102752515A CN2011101218931A CN201110121893A CN102752515A CN 102752515 A CN102752515 A CN 102752515A CN 2011101218931 A CN2011101218931 A CN 2011101218931A CN 201110121893 A CN201110121893 A CN 201110121893A CN 102752515 A CN102752515 A CN 102752515A
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Abstract
The invention discloses an implementation method of a flame effect at a programmable stage in graphics rendering. The method includes processing a vertex position and a vertex texture coordinate at a programmable vertex processing stage; calculating main colors and flame colors of fragments in each frame in a programmable fragment processor stage; and mixing the main colors and the flame colors to form the flame effect. According to the method, each frame can be located, a front frame and a back frame have no relevance, parallelism of graphics processing unit (GPU) is fully used, and the rendering efficiency is high.
Description
Technical field
The present invention relates to the captions manufacture technology field in broadcasting and TV field, relate in particular to the implementation method of stage flame effect able to programme in a kind of graph rendering.
Background technology
Continuous development along with computer graphical, image, video technique; Add that domestic radio, TV and film industries were in from the period of single-definition pattern to the high-definition mode transition, record and broadcast has proposed requirement higher, that upgrade to teletext in TV record and broadcast units such as TV station.Require greatly to strengthen, enrich picture and text and broadcast effect, represent visual impact.
Meeting needs to make the dynamic broadcast that a lot of stunts realize pel in video caption manufacturing process, comprises the wave inverted image, radial blur, and motion blur, phantom, butterfly, flame etc., the realization main body of flame stunt and the mixing of flame color obtain.
Realization for flame effect in the prior art mainly contains two kinds of methods, a kind ofly is based on that pixel realizes, another kind of method just is based on that particIe system realizes, and two kinds of methods all are based on, and CPU realizes.
For above-mentioned two kinds of implementation methods that realize flame effect, the inventor finds to exist following technical problem in the embodiment of the present invention process:
(1) based on the implementation method of pixel, back one frame is based on former frame, the effect that navigates to each frame on the timeline that can not be definite.
(2) method that realizes based on particIe system because of each frame all receives the influence of random number, can not navigate to each frame on the timeline.
(3) above-mentioned two kinds of methods realize on CPU that all can not make full use of the concurrency that GPU plays up, efficient is lower.
Summary of the invention
In order to solve the shortcoming of above-mentioned prior art; Main purpose of the present invention provides the implementation method of a kind of graph rendering stage flame effect able to programme; Be based on that GPU (Graphic Processing Unit, graphic process unit) realizes, can navigate to each frame; Front and back two frames do not have relevance, and implementation efficiency is high.
In order to achieve the above object, the invention provides the implementation method of a kind of graph rendering stage flame effect able to programme, specifically comprise:
The processing stage of programmable vertex, vertex position and vertex texture coordinate are handled;
Every frame is calculated the main body color and the flame color of fragment in the programmable fragment processor stage;
Said main body color is mixed the formation flame effect with said flame color result.
The implementation method of graph rendering provided by the invention stage flame effect able to programme can navigate to each frame and front and back two frames do not have relevance.Implementation method of the present invention on the other hand is based on the GPU realization, has made full use of the concurrency of GPU, and implementation efficiency is high.
Description of drawings
Technical scheme for the clearer explanation embodiment of the invention; The accompanying drawing of required use is done simple the introduction in will describing embodiment below; Conspicuous, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the implementation method block diagram of stage flame effect able to programme in a kind of graph rendering of the embodiment of the invention;
The method flow diagram that Fig. 2 handled summit and texture coordinate for the embodiment of the invention programmable vertex processor stage;
Fig. 3 is four vertex information sketch mapes of embodiment of the invention two-dimensional bodies.
Fig. 4 handles the sampling sketch map for the embodiment of the invention programmable fragment processor stage to texture;
Fig. 5 calculates the method sketch map of fragment color for the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, complete description; Obvious described embodiment only is a part of embodiment of the present invention, is not whole embodiment, based on the embodiment among the present invention; Those of ordinary skills are not paying the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Flame is upwards burning, above the object with about the zone need the effect of flame.Therefore will form flame effect mixes with regard to needs calculating fragment main body color and flame color.The embodiment of the invention one provides the implementation method of stage flame effect able to programme in a kind of graph rendering, and flow process as shown in Figure 1 is specially:
Step S1: the processing stage of programmable vertex, vertex position and vertex texture coordinate are handled.The upwards combustion efficiency of considering flame needs the largest contours at budget stunt effect whole story the object coordinates on summit to be amplified and amplified synchronously the texture coordinate of object.
As shown in Figure 2, specific as follows in the programmable vertex processor stage to the method step that summit and texture coordinate process:
Step S11: the coordinate to the summit amplifies, and because of in object coordinates system, the center is (0,0), therefore only need apex coordinate be multiply by a multiplication factor and just can realize amplifying.Fig. 3 is four vertex information sketch mapes of two-dimensional bodies, and establishing apex coordinate is Pos, and the x coordinate with Pos among the present invention amplifies 1.1 times.Whether the y value of judging Pos is greater than 0; If greater than 0 being summit 0 and summit 3, the y direction is amplified, y direction amplification multiple and flame combustion degree have relation; Summit y value becomes Posy* (1+fBurnFactor); Wherein, Posy representes the y component of position Pos, and fBurnFactor is the burning degree coefficient.
Step S12: according to the amplification on the summit of step S11, again because the coordinate of texture not at the center and in the upper left corner, so texture coordinate UV is operated as follows:
Texture x direction coordinate is (UVx-0.5) * 1.1+0.5;
When the y on summit direction was amplified, corresponding texture y direction coordinate was (UVy-0.5) * (1+fBurnFactor)+0.5;
Step S2: in body region, texture is sampled, obtain the color of main body.For example, texture is handled, sampled in the zone of texture coordinate between (0,0)～(1,1), obtain the color of main body in the programmable fragment processor stage.It is the zone 1 of innermost layer shown in Figure 4.
Step S3: according to present frame the noise texture of relevant position is sampled, obtains its color component rgba color value, color component rgba by 1.5,1.1,0.9,0 ratio phase adduction with the result as random number.
Flame is a kind of upwards effect of combustion, needs the effect that random number influences flame.Therefore in this effect, added a layer texture as the noise texture to obtain random number.The computational methods of random number can for: in the process of progress 0 to 1, by certain rule, such as u=0.2; V=u_progress etc.; Texture is the texture of two dimension, needs u, and two values of v could be sampled to the relevant position; Obtain the color at noise texture uv place, its color component rgba value can multiply by a coefficient respectively as random number.
Step S4: calculate the color of current fragment, get the color of some the main body fragment in certain zone, institute selected episode below, handle the flame color that obtains current fragment.Concrete processing method can be referring to shown in Figure 5: the fragment values of 8*3 position, Chooser below respectively with S3 in the random number effect, addition obtains the flame color of current fragment.
Step S5: main body rendering result among the step S1 is mixed with the flame rendering result of step S4, obtain the effect of flame combustion.
The implementation method of graph rendering provided by the invention stage flame effect able to programme can navigate to each frame and front and back two frames do not have relevance.Implementation method of the present invention on the other hand is based on the GPU realization, has made full use of the concurrency of GPU, and implementation efficiency is high.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through software, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; Technical scheme of the present invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above; Be merely a best specific embodiment of the present invention, but characteristic of the present invention is not limited thereto, any people who is familiar with this technology is in field of the present invention; The variation that can expect easily or modification all should be encompassed in the following claim of the present invention.
Claims (9)
1. the implementation method of a graph rendering stage flame effect able to programme is characterized in that, comprising:
The processing stage of programmable vertex, vertex position and vertex texture coordinate are handled;
Every frame is calculated the main body color and the flame color of fragment in the programmable fragment processor stage;
Said main body color is mixed the formation flame effect with said flame color result.
2. the implementation method of graph rendering as claimed in claim 1 stage flame effect able to programme; It is characterized in that, said vertex position and vertex texture coordinate are handled the largest contours that needs budget stunt effect whole story amplifies and amplify synchronously object to the object coordinates on summit texture coordinate.
3. the implementation method of graph rendering as claimed in claim 2 stage flame effect able to programme is characterized in that, the said object vertex coordinate is amplified comprises to the amplification of x direction with to the amplification of y direction.
4. the implementation method of graph rendering as claimed in claim 3 stage flame effect able to programme is characterized in that, said amplification to the y direction is that the y value is amplified according to the flame combustion degree greater than 0 summit.
5. the implementation method of graph rendering as claimed in claim 1 stage flame effect able to programme is characterized in that, before calculating flame color, also is included in the body region texture is sampled, and obtains the color of main body.
6. the implementation method of graph rendering as claimed in claim 1 stage flame effect able to programme is characterized in that, adds a layer texture as the noise texture in the process of calculating flame color.
7. the implementation method of graph rendering as claimed in claim 6 stage flame effect able to programme is characterized in that the noise texture of interpolation is in order to obtain random number.
8. the implementation method of graph rendering as claimed in claim 7 stage flame effect able to programme is characterized in that, said random number be the color value that obtains after according to present frame the noise texture being sampled in proportion addition obtain.
9. the implementation method of graph rendering as claimed in claim 1 stage flame effect able to programme is characterized in that, said flame color is that horizontal direction and a plurality of fragments that influence flame color of vertical direction of the fragment calculated are as required handled and obtained.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327260A (en) * | 2013-05-30 | 2013-09-25 | 新奥特（北京）视频技术有限公司 | Method and device for editing particles |
| CN103617594A (en) * | 2013-12-16 | 2014-03-05 | 中国民航大学 | Noise isopleth-surface drawing-oriented multi-GPU (Graphics Processing Unit) rendering parallel-processing device and method thereof |
| CN111768480A (en) * | 2020-07-03 | 2020-10-13 | 网易（杭州）网络有限公司 | Flame animation generation method and device, computer storage medium and electronic equipment |
| CN111951156A (en) * | 2020-08-24 | 2020-11-17 | 杭州趣维科技有限公司 | Method for drawing photoelectric special effect of graph |
| CN113750536A (en) * | 2020-06-04 | 2021-12-07 | 福建天晴数码有限公司 | 2D pixel flame method and system based on shader |
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| CN101377896A (en) * | 2007-08-31 | 2009-03-04 | 王志潮 | Method and apparatus for simulating flame combustion image |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327260A (en) * | 2013-05-30 | 2013-09-25 | 新奥特（北京）视频技术有限公司 | Method and device for editing particles |
| CN103617594A (en) * | 2013-12-16 | 2014-03-05 | 中国民航大学 | Noise isopleth-surface drawing-oriented multi-GPU (Graphics Processing Unit) rendering parallel-processing device and method thereof |
| CN103617594B (en) * | 2013-12-16 | 2017-01-11 | 中国民航大学 | Noise isopleth-surface drawing-oriented multi-GPU (Graphics Processing Unit) rendering parallel-processing device and method thereof |
| CN113750536A (en) * | 2020-06-04 | 2021-12-07 | 福建天晴数码有限公司 | 2D pixel flame method and system based on shader |
| CN113750536B (en) * | 2020-06-04 | 2023-09-01 | 福建天晴数码有限公司 | 2D pixel flame method and system based on coloring device |
| CN111768480A (en) * | 2020-07-03 | 2020-10-13 | 网易（杭州）网络有限公司 | Flame animation generation method and device, computer storage medium and electronic equipment |
| CN111768480B (en) * | 2020-07-03 | 2024-04-09 | 网易（杭州）网络有限公司 | Flame animation generation method and device, computer storage medium and electronic equipment |
| CN111951156A (en) * | 2020-08-24 | 2020-11-17 | 杭州趣维科技有限公司 | Method for drawing photoelectric special effect of graph |
| CN111951156B (en) * | 2020-08-24 | 2021-08-03 | 杭州小影创新科技股份有限公司 | Method for drawing photoelectric special effect of graph |
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Effective date of registration: 20211220 Address after: 100195 room 104, floor 1, building 1, courtyard 131, West Fourth Ring North Road, Haidian District, Beijing Patentee after: Beijing Jinsong Chuangyi Technology Co.,Ltd. Address before: 100195 new technology building, 49 Wukesong Road, Haidian District, Beijing Patentee before: China Digital Video (Beijing) Co.,Ltd. |