Generates a Shader Program content from loaded graphs. 更多...
| import 语句： | import Qt3D.Render 2.5 |
| 实例化： | QShaderProgramBuilder |
A shader program builder consists of several different shader graphs used to generate shader code.
A cache of generated shader code is maintained. Generated shaders are by defaults saved in QStandardPaths::writableLocation ( QStandardPaths::TempLocation )). This path can be overridden by setting environment variable QT3D_WRITABLE_CACHE_PATH to a valid writable path.
The use of the cache can be disabled by setting environment variable QT3D_DISABLE_SHADER_CACHE.
In most cases, changes made to a graph are detected by Qt 3D and a new cache entry will be generated. One case were this will not happen is when code snippets included by a graphs are changed. To work around that, clearing the cache directory or setting environment variable QT3D_REBUILD_SHADER_CACHE can be used to force shader code to be generated again.
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[read-only] computeShaderCode : string |
Holds the generated compute shader code
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enabledLayers : stringlist |
Holds the list of layers this builder will activate on the shader graphs during code generation.
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[read-only] fragmentShaderCode : string |
Holds the generated fragment shader code
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[read-only] geometryShaderCode : string |
Holds the generated geometry shader code
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shaderProgram : string |
Holds the shader program on which this builder generates code.
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[read-only] tessellationControlShaderCode : string |
Holds the generated tessellation control shader code
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[read-only] tessellationEvaluationShaderCode : string |
Holds the generated tessellation evaluation shader code
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[read-only] vertexShaderCode : string |
Holds the generated vertex shader code
