1 files changed, 12 insertions, 0 deletions
diff --git a/src/vec4ops/transform4d.cpp b/src/vec4ops/transform4d.cpp
index 5cc51f3..66ca8e3 100644
--- a/src/vec4ops/transform4d.cpp
+++ b/src/vec4ops/transform4d.cpp
@@ -15,4 +15,16 @@ glm::vec4 Vec4Ops::inverseTransformPoint4(glm::vec4 point4,  glm::mat4 inverseTr
     point4 += inverseTranslationPointVector;
     point4 = inverseTranslationPointVector * point4;
     return point4;
+}
+
+glm::vec4 Vec4Ops::transformDir4(glm::vec4 dir4, glm::mat4 transformDirectionMatrix) {
+    // do the direction
+    dir4 = transformDirectionMatrix * dir4;
+    return dir4;
+}
+
+glm::vec4 Vec4Ops::inverseTransformDir4(glm::vec4 dir4, glm::mat4 inverseTransformDirectionMatrix) {
+    // do the direction
+    dir4 = inverseTransformDirectionMatrix * dir4;
+    return dir4;
 }
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