add tests

Author: ANDO Yasushi

mat4_test.go

@@ -421,6 +421,26 @@ func TestMat4FromZRotation(t *testing.T) {
 }
 }
 
+func TestMat4FromRotationTranslationScale(t *testing.T) {
+q := QuatFromValues(1, 0, 0, 0)
+v := Vec3FromValues(1, 2, 3)
+s := []float64{4, 5, 6}
+
+actual := Mat4FromRotationTranslationScale(Mat4Create(), q, v, s)
+
+transMat := Mat4Create()
+Mat4Identity(transMat)
+Mat4Translate(transMat, transMat, v)
+rotateMat := Mat4Create()
+rotateMat = Mat4FromQuat(rotateMat, q)
+expect := Mat4Multiply(Mat4Create(), transMat, rotateMat)
+Mat4Scale(expect, expect, s)
+
+if !testSlice(actual, expect) {
+t.Errorf("from rotation, translation and scale: \n%v \n%v", actual, expect)
+}
+}
+
 func TestMat4Str(t *testing.T) {
 actual := Mat4Str(mat4A)
 expect := "mat4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 2, 3, 1)"