X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=util.cpp;fp=util.cpp;h=08298c7701b9146fcbd76b9330170b458a80f28b;hb=cfe0bc4fa1e2a56eeb12c33e596f79c1292292c8;hp=8dcf219b3ee6be7cd8592f26268eefb33bae3fcb;hpb=24660d2111d0ee97228016a7072304ff657d297b;p=movit

diff --git a/util.cpp b/util.cpp
index 8dcf219..08298c7 100644
--- a/util.cpp
+++ b/util.cpp
@@ -99,6 +99,13 @@ void multiply_3x3_matrices(const Matrix3x3 a, const Matrix3x3 b, Matrix3x3 resul
         result[8] = a[2] * b[6] + a[5] * b[7] + a[8] * b[8];
 }
 
+void multiply_3x3_matrix_float3(const Matrix3x3 M, float x0, float x1, float x2, float *y0, float *y1, float *y2)
+{
+	*y0 = M[0] * x0 + M[3] * x1 + M[6] * x2;
+	*y1 = M[1] * x0 + M[4] * x1 + M[7] * x2;
+	*y2 = M[2] * x0 + M[5] * x1 + M[8] * x2;
+}
+
 void invert_3x3_matrix(const Matrix3x3 m, Matrix3x3 result)
 {
 	double inv_det = 1.0 / (