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Modify the depth buffer value in TinyRenderer to be consistent as in OpenGL.

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This commit is contained in:
yunfeibai
2017-02-08 11:34:38 -08:00
parent 8034a6f7fc
commit ce69f27f32
4 changed files with 27 additions and 2 deletions
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11
examples/SharedMemory/TinyRendererVisualShapeConverter.cpp
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@@ -958,7 +958,16 @@ void TinyRendererVisualShapeConverter::copyCameraImageData(unsigned char* pixels
{
if (depthBuffer)
{
depthBuffer[i] = m_data->m_depthBuffer[i+startPixelIndex];
float distance = -m_data->m_depthBuffer[i+startPixelIndex];
float farPlane = m_data->m_camera.getCameraFrustumFar();
float nearPlane = m_data->m_camera.getCameraFrustumNear();
btClamp(distance,nearPlane,farPlane);
// the depth buffer value is between 0 and 1
float a = farPlane / (farPlane - nearPlane);
float b = farPlane * nearPlane / (nearPlane - farPlane);
depthBuffer[i] = a + b / distance;
}
if (segmentationMaskBuffer)
{