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Project Rembrandt: Difference between revisions
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Model-transparent example code. Add dates to reference.
(Model-transparent example code. Add dates to reference.) |
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Every model is, by default, rendered using the <tt>Effects/model-default</tt> effect. This effect initialize the G-buffer, ignoring transparent surfaces, by doing alpha testing and rendering all the geometry in the default bin. It is not possible to redirect rendering to transparent bins when the associated texture has alpha channel because most models use a single texture atlas and even opaque parts are rendered with texture with alpha channel. | Every model is, by default, rendered using the <tt>Effects/model-default</tt> effect. This effect initialize the G-buffer, ignoring transparent surfaces, by doing alpha testing and rendering all the geometry in the default bin. It is not possible to redirect rendering to transparent bins when the associated texture has alpha channel because most models use a single texture atlas and even opaque parts are rendered with texture with alpha channel. | ||
If a model needs to have transparent or translucent surfaces, these surface objects need to be assigned a different effect that sets explicitly the render bin to "DepthSortedBin", or sets the rendering hint to "transparent". This tells the renderer to render this object using forward rendering, so lighting and fog need to be enabled, and if a shader program is used, they should be computed in the classical way. The <tt>Effects/model-transparent</tt> can be used to register simple transparent/translucent surfaces. | If a model needs to have transparent or translucent surfaces, these surface objects need to be assigned a different effect that sets explicitly the render bin to "DepthSortedBin", or sets the rendering hint to "transparent". This tells the renderer to render this object using forward rendering, so lighting and fog need to be enabled, and if a shader program is used, they should be computed in the classical way. The <tt>Effects/model-transparent</tt> can be used to register simple transparent/translucent surfaces. You assign this effect to an object (or multiple objects) like: | ||
<effect> | |||
<inherits-from>Effects/model-transparent</inherits-from> | |||
<object-name>TheObject</object-name> | |||
</effect> | |||
If opaque surface need to have special effect, for example to apply bump mapping, this effect should use the "RenderBin" bin, or the rendering hint set to "opaque", and the G-buffer needs to be initialized correctly in the Geometry stage. | If opaque surface need to have special effect, for example to apply bump mapping, this effect should use the "RenderBin" bin, or the rendering hint set to "opaque", and the G-buffer needs to be initialized correctly in the Geometry stage. | ||
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* {{cite web |url=http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter09.html |title=Deferred Shading in S.T.A.L.K.E.R. |author=Oles Shishkovtsov }} | * {{cite web |url=http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter09.html |title=Deferred Shading in S.T.A.L.K.E.R. |author=Oles Shishkovtsov }} | ||
* {{cite web |url=http://http.developer.nvidia.com/GPUGems3/gpugems3_ch19.html |title=Deferred Shading in Tabula Rasa |author=Rusty Koonce }} | * {{cite web |url=http://http.developer.nvidia.com/GPUGems3/gpugems3_ch19.html |title=Deferred Shading in Tabula Rasa |author=Rusty Koonce }} | ||
* {{cite web |url=http://aras-p.info/blog/2009/08/04/compact-normal-storage-for-small-g-buffers/ |title=Compact Normal Storage for small g-buffers |author=Aras Pranckevičius }} | * {{cite web |url=http://aras-p.info/blog/2009/08/04/compact-normal-storage-for-small-g-buffers/ |title=Compact Normal Storage for small g-buffers |author=Aras Pranckevičius |date=4 August 2009 |accessdate=12 April 2012 }} | ||
}} | }} | ||
[[Category:Shader development]] | [[Category:Shader development]] | ||
[[Category:Core development projects]] | [[Category:Core development projects]] | ||