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SwRasterizer: Flip the vertex quaternions before clipping (if necessary).

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Subv 2017-06-11 11:55:35 -05:00 • committed by wwylele
parent 2a75837bc3
commit 73566ff7a9
3 changed files with 16 additions and 21 deletions
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11
src/video_core/swrasterizer/clipper.cpp
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@ -95,6 +95,17 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
static const size_t MAX_VERTICES = 9;
static_vector<Vertex, MAX_VERTICES> buffer_a = {v0, v1, v2};
static_vector<Vertex, MAX_VERTICES> buffer_b;
auto FlipQuaternionIfOpposite = [](auto& a, const auto& b) {
if (Math::Dot(a, b) < float24::Zero())
a = -a;
};
// Flip the quaternions if they are opposite to prevent interpolating them over the wrong
// direction.
FlipQuaternionIfOpposite(buffer_a[1].quat, buffer_a[0].quat);
FlipQuaternionIfOpposite(buffer_a[2].quat, buffer_a[0].quat);
auto* output_list = &buffer_a;
auto* input_list = &buffer_b;