1 files changed, 65 insertions, 0 deletions
diff --git a/Runtime/Terrain/ImposterRenderTexture.h b/Runtime/Terrain/ImposterRenderTexture.h
new file mode 100644
index 0000000..de7714f
--- /dev/null
+++ b/Runtime/Terrain/ImposterRenderTexture.h
@@ -0,0 +1,65 @@
+#pragma once
+#include "Configuration/UnityConfigure.h"
+
+#if ENABLE_TERRAIN
+
+#include "TreeDatabase.h"
+#include "Runtime/Math/Rect.h"
+#include <vector>
+
+
+class RenderTexture;
+class Camera;
+
+
+class ImposterRenderTexture
+{
+public:
+	ImposterRenderTexture(const TreeDatabase& treeDB);
+	~ImposterRenderTexture();
+		
+	const Rectf& GetArea(int index) const {
+		return m_Areas[index];
+	}	
+
+	RenderTexture* GetTexture() const { return m_Texture; }
+	bool GetSupported() const { return m_Supported; }
+
+	void UpdateImposters(const Camera& mainCamera);
+
+	void InvalidateAngles () 
+	{
+		m_AngleX = std::numeric_limits<float>::infinity();
+		m_AngleY = std::numeric_limits<float>::infinity();
+	}
+
+	const Matrix4x4f& getCameraOrientation() const { return m_CameraOrientationMatrix; }
+
+	void GetBillboardParams(float& angleFactor, float& offsetFactor) const;
+private:
+	void UpdateImposter(const Rectf& rect, const TreeDatabase::Prototype& prototype);
+
+private:
+	const TreeDatabase&	m_TreeDatabase;
+
+	std::vector<Rectf> m_Areas;
+	Camera* m_Camera;
+	RenderTexture* m_Texture;
+	bool		m_Supported;
+
+	float    m_AngleX;
+	float    m_AngleY;
+
+	int 		    m_ImposterHeight;
+	int 		    m_MaxImposterSize;
+
+	Matrix4x4f m_CameraOrientationMatrix;
+
+	static void InvalidateRenderTexture(void* userData) {
+		((ImposterRenderTexture*)userData)->InvalidateAngles();
+	}
+};
+
+#endif // ENABLE_TERRAIN
+
+