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Use float when clipping the shadow map index, because the index before clipping can be out of the range for int.

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This commit is contained in:
yunfeibai 2017-04-25 18:28:56 -07:00
parent a159709820
commit 56f9c38226
1 changed files with 3 additions and 3 deletions
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6
examples/TinyRenderer/TinyRenderer.cpp
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@ -130,9 +130,9 @@ struct Shader : public IShader {
float depth = p[2];
p = p/p[3];
int index_x = b3Max(0, b3Min(m_width-1, int(p[0])));
int index_y = b3Max(0, b3Min(m_height-1, int(p[1])));
int idx = index_x + index_y*m_width; // index in the shadowbuffer array
float index_x = b3Max(float(0.0), b3Min(float(m_width-1), p[0]));
float index_y = b3Max(float(0.0), b3Min(float(m_height-1), p[1]));
int idx = int(index_x) + int(index_y)*m_width; // index in the shadowbuffer array
float shadow = 0.8+0.2*(m_shadowBuffer->at(idx)<-depth+0.05); // magic coeff to avoid z-fighting
Vec3f bn = (varying_nrm*bar).normalize();