[5] | 1 | /** |
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| 2 | Implementation of Deferred Shading in OGRE using Multiple Render Targets and |
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| 3 | HLSL/GLSL high level language shaders. |
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| 4 | // W.J. :wumpus: van der Laan 2005 // |
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| 5 | |
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| 6 | Deferred shading renders the scene to a 'fat' texture format, using a shader that outputs colour, |
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| 7 | normal, depth, and possible other attributes per fragment. Multi Render Target is required as we |
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| 8 | are dealing with many outputs which get written into multiple render textures in the same pass. |
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| 9 | |
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| 10 | After rendering the scene in this format, the shading (lighting) can be done as a post process. |
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| 11 | This means that lighting is done in screen space. Adding them requires nothing more than rendering |
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| 12 | a screenful quad; thus the method allows for an enormous amount of lights without noticable |
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| 13 | performance loss. |
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| 14 | |
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| 15 | Little lights affecting small area ("Minilights") can be even further optimised by rendering |
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| 16 | their convex bounding geometry. This is also shown in this demo by 6 swarming lights. |
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| 17 | |
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| 18 | The paper for GDC2004 on Deferred Shading can be found here: |
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| 19 | http://www.talula.demon.co.uk/DeferredShading.pdf |
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| 20 | |
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| 21 | This uses a heavily hacked version of the Ogre PostProcessing framework by Manuel. |
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| 22 | ******************************************************************************* |
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| 23 | Copyright (c) W.J. van der Laan |
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| 24 | |
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| 25 | Permission is hereby granted, free of charge, to any person obtaining a copy of |
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| 26 | this software and associated documentation files (the "Software"), to deal in |
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| 27 | the Software without restriction, including without limitation the rights to use, |
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| 28 | copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the |
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| 29 | Software, and to permit persons to whom the Software is furnished to do so, subject |
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| 30 | to the following conditions: |
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| 31 | |
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| 32 | The above copyright notice and this permission notice shall be included in all copies |
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| 33 | or substantial portions of the Software. |
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| 34 | |
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| 35 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
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| 36 | INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A |
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| 37 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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| 38 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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| 39 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,OUT OF OR IN CONNECTION WITH THE |
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| 40 | SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 41 | ******************************************************************************* |
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| 42 | */ |
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| 43 | #ifndef H_WJ_LightMaterialGenerator |
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| 44 | #define H_WJ_LightMaterialGenerator |
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| 45 | |
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| 46 | #include "MaterialGenerator.h" |
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| 47 | |
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| 48 | class LightMaterialGenerator: public MaterialGenerator |
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| 49 | { |
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| 50 | public: |
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| 51 | LightMaterialGenerator(const Ogre::String &language); |
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| 52 | }; |
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| 53 | |
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| 54 | #endif |
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