1 files changed, 32 insertions, 14 deletions
diff --git a/src/prenderer.cpp b/src/prenderer.cpp
index 54b19cf..fc6edd4 100644
--- a/src/prenderer.cpp
+++ b/src/prenderer.cpp
@@ -1,4 +1,24 @@
 static v2
+T_CompPosToLayerPos(layer_transforms T, uint32 FileWidth, uint32 FileHeight, uint32 SourceWidth, uint32 SourceHeight, real32 X, real32 Y)
+{
+    real32 Rad = (T.rotation* (PI / 180));
+    v2 XAxis = (SourceWidth *   T.scale)*V2(cos(Rad), sin(Rad));
+    v2 YAxis = (SourceHeight * -T.scale)*V2(sin(Rad), -cos(Rad));
+
+    v2 Pos = {T.x, T.y};
+    v2 Origin = Pos - (XAxis * T.ax) - (YAxis * T.ay);
+
+    v2 XAxisPerp = (1.0f / LengthSq(XAxis))*XAxis;
+    v2 YAxisPerp = (1.0f / LengthSq(YAxis))*YAxis;
+
+    real32 StartVectorX = X - Origin.x;
+    real32 StartVectorY = Y - Origin.y;
+    real32 LayerU = (StartVectorX * XAxisPerp.x) + (StartVectorY * XAxisPerp.y);
+    real32 LayerV = (StartVectorX * YAxisPerp.x) + (StartVectorY * YAxisPerp.y);
+    return V2(LayerU * SourceWidth, LayerV * SourceHeight);
+}
+
+static v2
 T_CompUVToLayerUV(layer_transforms T, uint32 FileWidth, uint32 FileHeight, uint32 SourceWidth, uint32 SourceHeight, v2 CompUV)
 {
     real32 X = CompUV.x*FileWidth;
@@ -37,20 +57,6 @@ Transform_ScreenSpaceToLocal(layer_transforms T, uint32 FileWidth, uint32 FileHe
     return V2(LayerUV.x * SourceWidth, LayerUV.y * SourceHeight);
 }
 
-static void
-Layer_GetDimensions(memory *Memory, block_layer *Layer, int *Width, int *Height)
-{
-    if (!Layer->IsPrecomp) {
-        block_source *Source = (block_source *)Memory_Block_AddressAtIndex(Memory, F_Sources, Layer->Block_Source_Index);
-        *Width = Source->Width;
-        *Height = Source->Height;
-    } else {
-        block_composition *Comp = (block_composition *)Memory_Block_AddressAtIndex(Memory, F_Precomps, Layer->Block_Source_Index);
-        *Width = Comp->Width;
-        *Height = Comp->Height;
-    }
-}
-
 // Transform given data based on state's Interact data.
 static void
 Transform_ApplyInteractive(interact_transform Interact, real32 *OutputX, real32 *OutputY, real32 *OutputRotation, real32 *OutputScale)
@@ -220,6 +226,7 @@ Interact_Transform_Begin(project_data *File, memory *Memory, project_state *Stat
     */
 }
 
+
 static v2
 TransformPoint(layer_transforms T, real32 Width, real32 Height, v2 Point)
 {
@@ -230,6 +237,17 @@ TransformPoint(layer_transforms T, real32 Width, real32 Height, v2 Point)
     return V2(T.x + LocalPoint.x, T.y + LocalPoint.y);
 }
 
+static layer_transforms
+Transform_Inverse(layer_transforms T)
+{
+    T.x = -T.x;
+    T.y = -T.y;
+    T.ax = -T.ax;
+    T.ay = -T.ay;
+    T.rotation = T.rotation;
+    T.scale = 1.0f;
+    return T;
+}
 
 static ImVec2
 Layer_LocalToScreenSpace(project_state *State, memory *Memory, block_layer *Layer, ui *UI, uint32 PrincipalCompIndex, v2 Point)