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0028129: Visualization, Path Tracing - Improve interactivity in "steady" rendering mode

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Re-basing the patch on current master.
This commit is contained in:
dbp
2017-01-26 12:56:13 +03:00
committed by apn
parent 952886f056
commit 4eaaf9d812
13 changed files with 278 additions and 96 deletions
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11
src/OpenGl/OpenGl_TileSampler.hxx
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@@ -22,7 +22,12 @@
#include <vector>
//! Tool object used for sampling screen tiles according to estimated pixel variance (used in path tracing engine).
//! To improve GPU thread coherency, render window is split into pixel blocks or tiles.
//! To improve GPU thread coherency, rendering window is split into pixel blocks or tiles. The important feature of
//! this approach is that it is possible to keep the same number of tiles for any screen resolution (e.g. 256 tiles
//! can be used for both 512 x 512 window and 1920 x 1080 window). So, a smaller number of tiles allows to increase
//! interactivity (FPS), but at the cost of higher per-frame variance ('noise'). On the contrary a larger number of
//! tiles decrease interactivity, but leads to lower per-frame variance. Note that the total time needed to produce
//! final final image is the same for both cases.
class OpenGl_TileSampler
{
public:
@@ -76,7 +81,9 @@ public:
//! Uploads offsets of sampled tiles to the given OpenGL texture.
Standard_EXPORT void Upload (const Handle(OpenGl_Context)& theContext,
const Handle(OpenGl_Texture)& theTexture,
bool theAdaptive);
const int theNbTilesX,
const int theNbTilesY,
const bool theAdaptive);
protected: