Function FrustumCornersWS

engine/Poseidon/Graphics/Shadow/ShadowMath.cpp:217–231

}

std::array<Vec3, 8> FrustumCornersWS(const Mat4& invViewProj)
{
    static const float nx[4] = {-1.0f, 1.0f, 1.0f, -1.0f};
    static const float ny[4] = {-1.0f, -1.0f, 1.0f, 1.0f};
    std::array<Vec3, 8> out;
    for (int i = 0; i < 4; i++)
    {
        out[i] = TransformPoint(invViewProj, {nx[i], ny[i], 0.0f}); // near plane: zero-to-one NDC z = 0
    }
    for (int i = 0; i < 4; i++)
    {
        out[i + 4] = TransformPoint(invViewProj, {nx[i], ny[i], 1.0f});
    }
    return out;
}

std::array<Vec3, 8> SliceFrustum(const std::array<Vec3, 8>& corners, float t0, float t1)
{