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0030476: Visualization, Path Tracing - Adaptive Screen Sampling leads to unstable results

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OpenGl_View::runPathtrace() has been extended with alternative multi-pass
Adaptive Screen Sampling mode, not relying on atomic floating point operations.
Although atomic operations on floats allows single-pass rendering,
such operations leads to instability in case of different calculation order.
Atomic float operations are also currently supported only by single GPU vendor.

Fixed GLSL compilation on Intel drivers (follow ARB_shader_image_load_store
specs rather than EXT_shader_image_load_store).

Graphic3d_RenderingParams::AdaptiveScreenSamplingAtomic option has been added
to activate 1-pass Adaptive Screen Sampling mode when supported by hardware.

vfps command has been extended with -duration argument allowing to limit command execution time.
vactivate command has been extended with -noUpdate argument.
This commit is contained in:
kgv
2019-02-11 18:00:35 +03:00
committed by apn
parent 66d1cdc65d
commit e084dbbc20
18 changed files with 488 additions and 147 deletions
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10
src/OpenGl/OpenGl_Context.hxx
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@@ -503,6 +503,9 @@ public:
//! @return TRUE if adaptive screen sampling in ray tracing mode is supported
Standard_Boolean HasRayTracingAdaptiveSampling() const { return myHasRayTracingAdaptiveSampling; }
//! @return TRUE if atomic adaptive screen sampling in ray tracing mode is supported
Standard_Boolean HasRayTracingAdaptiveSamplingAtomic() const { return myHasRayTracingAdaptiveSamplingAtomic; }
//! Returns true if VBO is supported and permitted.
inline bool ToUseVbo() const
{
@@ -928,9 +931,10 @@ private: // context info
Standard_Boolean myIsGlNormalizeEnabled; //!< GL_NORMALIZE flag
//!< Used to tell OpenGl that normals should be normalized
Standard_Boolean myHasRayTracing; //! indicates whether ray tracing mode is supported
Standard_Boolean myHasRayTracingTextures; //! indicates whether textures in ray tracing mode are supported
Standard_Boolean myHasRayTracingAdaptiveSampling; //! indicates whether adaptive screen sampling in ray tracing mode is supported
Standard_Boolean myHasRayTracing; //! indicates whether ray tracing mode is supported
Standard_Boolean myHasRayTracingTextures; //! indicates whether textures in ray tracing mode are supported
Standard_Boolean myHasRayTracingAdaptiveSampling; //! indicates whether adaptive screen sampling in ray tracing mode is supported
Standard_Boolean myHasRayTracingAdaptiveSamplingAtomic; //! indicates whether atomic adaptive screen sampling in ray tracing mode is supported
Handle(OpenGl_ShaderManager) myShaderManager; //! support object for managing shader programs