1 files changed, 58 insertions, 0 deletions
diff --git a/src/render/Occlusion.h b/src/render/Occlusion.h
new file mode 100644
index 00000000..9a415f88
--- /dev/null
+++ b/src/render/Occlusion.h
@@ -0,0 +1,58 @@
+#pragma once
+
+struct ActiveOccluderLine {
+	CVector2D origin;
+	CVector2D direction;
+	float length; 
+};
+
+class CActiveOccluder {
+
+public:
+	ActiveOccluderLine lines[6];
+	int32 linesCount;
+	float radius; 
+
+	bool IsPointWithinOcclusionArea(float x, float y, float area);
+};
+
+class COccluder
+{
+public:
+	int16 length, width, height;
+	int16 x, y, z;
+	uint16 angle;
+	int16 listIndex;
+
+	bool NearCamera();
+	bool ProcessOneOccluder(CActiveOccluder *occl);
+	bool ProcessLineSegment(int corner1, int corner2, CActiveOccluder* occl);
+	float GetAngle(void) { return angle*TWOPI/UINT16_MAX; }
+};
+
+class COcclusion
+{
+public:
+	static int32 NumOccludersOnMap;
+	static int16 FarAwayList;
+	static int16 NearbyList;
+	static int16 ListWalkThroughFA;
+	static int16 PreviousListWalkThroughFA;
+	static int16 NumActiveOccluders;
+
+	static COccluder aOccluders[NUMOCCLUSIONVOLUMES];
+	static CActiveOccluder aActiveOccluders[NUMACTIVEOCCLUDERS];
+
+	static void Init(void);
+	static void AddOne(float x, float y, float z, float width, float length, float height, float angle);
+	static void ProcessBeforeRendering(void); 
+	static bool OccluderHidesBehind(CActiveOccluder *occl1, CActiveOccluder *occl2);
+	static bool IsAABoxOccluded(CVector pos, float width, float length, float height);
+	static bool IsPositionOccluded(CVector pos, float side);
+	static void Render();
+};
+
+bool CalcScreenCoors(CVector const &in, CVector *out, float *outw, float *outh);
+bool CalcScreenCoors(CVector const &in, CVector *out);
+
+extern bool bDisplayOccDebugStuff;