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feat(matrix): add operator* for C44Matrix and C44Matrix

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fallenoak 2020-11-29 23:45:50 -06:00
parent 957635b484
commit f8404c9592
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tempest/matrix/C44Matrix.cpp
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@ -83,3 +83,27 @@ C44Matrix operator*(const C44Matrix& l, float a) {
return { a0, a1, a2, a3, b0, b1, b2, b3, c0, c1, c2, c3, d0, d1, d2, d3 };
}
C44Matrix operator*(const C44Matrix& l, const C44Matrix& r) {
float a0 = l.a0 * r.a0 + l.a1 * r.b0 + l.a2 * r.c0 + l.a3 * r.d0;
float a1 = l.a0 * r.a1 + l.a1 * r.b1 + l.a2 * r.c1 + l.a3 * r.d1;
float a2 = l.a0 * r.a2 + l.a1 * r.b2 + l.a2 * r.c2 + l.a3 * r.d2;
float a3 = l.a0 * r.a3 + l.a1 * r.b3 + l.a2 * r.c3 + l.a3 * r.d3;
float b0 = l.b0 * r.a0 + l.b1 * r.b0 + l.b2 * r.c0 + l.b3 * r.d0;
float b1 = l.b0 * r.a1 + l.b1 * r.b1 + l.b2 * r.c1 + l.b3 * r.d1;
float b2 = l.b0 * r.a2 + l.b1 * r.b2 + l.b2 * r.c2 + l.b3 * r.d2;
float b3 = l.b0 * r.a3 + l.b1 * r.b3 + l.b2 * r.c3 + l.b3 * r.d3;
float c0 = l.c0 * r.a0 + l.c1 * r.b0 + l.c2 * r.c0 + l.c3 * r.d0;
float c1 = l.c0 * r.a1 + l.c1 * r.b1 + l.c2 * r.c1 + l.c3 * r.d1;
float c2 = l.c0 * r.a2 + l.c1 * r.b2 + l.c2 * r.c2 + l.c3 * r.d2;
float c3 = l.c0 * r.a3 + l.c1 * r.b3 + l.c2 * r.c3 + l.c3 * r.d3;
float d0 = l.d0 * r.a0 + l.d1 * r.b0 + l.d2 * r.c0 + l.d3 * r.d0;
float d1 = l.d0 * r.a1 + l.d1 * r.b1 + l.d2 * r.c1 + l.d3 * r.d1;
float d2 = l.d0 * r.a2 + l.d1 * r.b2 + l.d2 * r.c2 + l.d3 * r.d2;
float d3 = l.d0 * r.a3 + l.d1 * r.b3 + l.d2 * r.c3 + l.d3 * r.d3;
return { a0, a1, a2, a3, b0, b1, b2, b3, c0, c1, c2, c3, d0, d1, d2, d3 };
}