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Diffstat (limited to 'doc/src/07-file-formats/5-custom-material-reference.qdoc')
| -rw-r--r-- | doc/src/07-file-formats/5-custom-material-reference.qdoc | 56 |
1 files changed, 3 insertions, 53 deletions
diff --git a/doc/src/07-file-formats/5-custom-material-reference.qdoc b/doc/src/07-file-formats/5-custom-material-reference.qdoc index 5821e0b6..d969cebc 100644 --- a/doc/src/07-file-formats/5-custom-material-reference.qdoc +++ b/doc/src/07-file-formats/5-custom-material-reference.qdoc @@ -45,9 +45,8 @@ The material system supports dielectric and transparent materials, point lights, area lights, ambient occlusion, shadowing, two-sided polygons, index-of-refraction and fragment cutoff(masking). -Custom materials support multiple render passes. Each pass needs to have -the fragment shader implemented either by using the material system or writing -a main function. +\note The Qt 3D Studio 2.0 runtime does not support multiple render passes for +custom materials. \section1 Required Functions @@ -463,56 +462,7 @@ void main() The only requirement is to leave the closing parenthesis out since the material system adds it. -\section1 Render Passes - -Custom material can contain multiple passes. This allows implementing complicated materials, -but they are also more expensive. Multipass material needs to specify the shaders and passes -separately using the xml-notation where shaders are defined inside the Shaders element and -passes using the Passes element. Renderpasses are executed in the order they are specified -in the material. - -\badcode - -<Shaders> - <Shader name="MAIN"> - <VertexShader> - ... - </VertexShader> - <FragmentShader> - ... - </FragmentShader> - </Shader> - <Shader name="PREPASS"> - <VertexShader> - ... - </VertexShader> - <FragmentShader> - ... - </FragmentShader> - </Shader> -</Shaders> -<Passes> - <ShaderKey value="20"/> - <LayerKey count="1"/> - <Buffer name="frame_buffer" format="source" filter="linear" wrap="clamp" size="1.0" lifetime="frame"/> - <Buffer name="temp_buffer" format="source" filter="linear" wrap="clamp" size="1.0" lifetime="frame"/> - <Pass shader="PREPASS" output="temp_buffer"> - <BufferBlit dest="frame_buffer"/> - <BufferInput value="frame_buffer" param="OriginBuffer"/> - </Pass> - <Pass shader="MAIN"> - <BufferInput value="temp_buffer" param="paramName"/> - <Blending source="SrcAlpha" dest="OneMinusSrcAlpha"/> - </Pass> -</Passes> -\endcode - -Buffer-element can be used to create temporary buffers for the material. To access the current -framebuffer, one must use the BufferBlit-element inside Pass-element to copy the -framebuffer content to a buffer, which can then be accessed inside the shader. To access the -buffer inside shader, one must specify input parameter with the BufferInput-element, which binds -the buffer to a sampler declared in the shader. Blending-element can be used to change the -blending mode of the pass. +\section1 ShaderKey ShaderKey-element is a magic number specifying how the material gets compiled. The value is the sum of the properties the material needs to enable. Supported properties are: |