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SwRasterizer/Clipper: flip the sign convention to match PICA and OpenGL

nce_cpp
wwylele 8 years ago
parent
55eaecad8f
commit
b67850c882
1 changed files with 9 additions and 9 deletions
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  1. 18
      src/video_core/swrasterizer/clipper.cpp

18
src/video_core/swrasterizer/clipper.cpp
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@ -31,7 +31,7 @@ public:
: coeffs(coeffs), bias(bias) {}
bool IsInside(const Vertex& vertex) const {
return Math::Dot(vertex.pos + bias, coeffs) <= float24::FromFloat32(0);
return Math::Dot(vertex.pos + bias, coeffs) >= float24::FromFloat32(0);
}
bool IsOutSide(const Vertex& vertex) const {
@ -116,13 +116,13 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
static const float24 f0 = float24::FromFloat32(0.0);
static const float24 f1 = float24::FromFloat32(1.0);
static const std::array<ClippingEdge, 7> clipping_edges = {{
{Math::MakeVec(f1, f0, f0, -f1)}, // x = +w
{Math::MakeVec(-f1, f0, f0, -f1)}, // x = -w
{Math::MakeVec(f0, f1, f0, -f1)}, // y = +w
{Math::MakeVec(f0, -f1, f0, -f1)}, // y = -w
{Math::MakeVec(f0, f0, f1, f0)}, // z = 0
{Math::MakeVec(f0, f0, -f1, -f1)}, // z = -w
{Math::MakeVec(f0, f0, f0, -f1), Math::Vec4<float24>(f0, f0, f0, EPSILON)}, // w = EPSILON
{Math::MakeVec(-f1, f0, f0, f1)}, // x = +w
{Math::MakeVec(f1, f0, f0, f1)}, // x = -w
{Math::MakeVec(f0, -f1, f0, f1)}, // y = +w
{Math::MakeVec(f0, f1, f0, f1)}, // y = -w
{Math::MakeVec(f0, f0, -f1, f0)}, // z = 0
{Math::MakeVec(f0, f0, f1, f1)}, // z = -w
{Math::MakeVec(f0, f0, f0, f1), Math::Vec4<float24>(f0, f0, f0, EPSILON)}, // w = EPSILON
}};
// Simple implementation of the Sutherland-Hodgman clipping algorithm.
@ -157,7 +157,7 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
}
if (g_state.regs.rasterizer.clip_enable) {
ClippingEdge custom_edge{-g_state.regs.rasterizer.GetClipCoef()};
ClippingEdge custom_edge{g_state.regs.rasterizer.GetClipCoef()};
Clip(custom_edge);
if (output_list->size() < 3)

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