1 files changed, 61 insertions, 0 deletions
diff --git a/Runtime/Camera/CameraUtil.h b/Runtime/Camera/CameraUtil.h
new file mode 100644
index 0000000..ee747c2
--- /dev/null
+++ b/Runtime/Camera/CameraUtil.h
@@ -0,0 +1,61 @@
+#ifndef CAMERA_UTIL_H
+#define CAMERA_UTIL_H
+
+#include "Runtime/Math/Matrix4x4.h"
+#include "Runtime/Math/Rect.h"
+#include "Runtime/Modules/ExportModules.h"
+
+class GfxDevice;
+class Vector3f;
+class Plane;
+
+void LoadPixelMatrix( const Rectf& screenRect, GfxDevice& device, bool setMatrix, bool invertYTexelOffset );
+void CalcPixelMatrix (const Rectf& screenRect, Matrix4x4f &out);
+void ApplyTexelOffsetsToPixelMatrix( bool invertYTexelOffset, Matrix4x4f& matrix );
+void LoadFullScreenOrthoMatrix( float nearPlane = -1.0f, float farPlane = 100.0f, bool forceNoHalfTexelOffset = false );
+void GetHalfTexelOffsets( float& outx, float& outy );
+void SetupPixelCorrectCoordinates();
+
+void RectfToViewport( const Rectf& r, int viewPort[4] );
+void FlipScreenRectIfNeeded( const GfxDevice& device, int screenviewcoord[4] );
+void SetGLViewport (const Rectf& pixelRect);
+
+// World point to screen point
+// p = world point
+// outP = result (x, y = in pixels inside the viewport, z = world space distance from the camera)
+//
+// sets outP to (0,0,0) if fails.
+bool CameraProject( const Vector3f& p, const Matrix4x4f& cameraToWorld, const Matrix4x4f& worldToClip, const int viewport[4], Vector3f& outP );
+
+// Screen point to world point
+// p = screen point (x, y = in pixels inside the viewport, z = world space distance from the camera)
+//
+// sets outP to (0,0,0) if fails.
+bool CameraUnProject( const Vector3f& p, const Matrix4x4f& cameraToWorld, const Matrix4x4f& clipToWorld, const int viewport[4], Vector3f& outP );
+
+// Extract frustum planes from Projection matrix
+void EXPORT_COREMODULE ExtractProjectionPlanes (const Matrix4x4f& projection, Plane* planes);
+void EXPORT_COREMODULE ExtractProjectionNearPlane (const Matrix4x4f& projection, Plane* outPlane);
+
+void SetClippingPlaneShaderProps();
+
+
+class DeviceMVPMatricesState {
+public:
+	DeviceMVPMatricesState ();
+	~DeviceMVPMatricesState();
+	const Matrix4x4f& GetView() const { return m_View; }
+	const Matrix4x4f& GetProj() const { return m_Proj; }
+private:
+	Matrix4x4f	m_World, m_View, m_Proj;
+};
+
+class DeviceViewProjMatricesState {
+public:
+	DeviceViewProjMatricesState ();
+	~DeviceViewProjMatricesState();
+private:
+	Matrix4x4f	m_View, m_Proj;
+};
+
+#endif