1 files changed, 73 insertions, 0 deletions
diff --git a/engine/decal_clip.h b/engine/decal_clip.h
new file mode 100644
index 0000000..095634c
--- /dev/null
+++ b/engine/decal_clip.h
@@ -0,0 +1,73 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef DECAL_CLIP_H
+#define DECAL_CLIP_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "mathlib/vector.h"
+#include "mathlib/vector2d.h"
+#include "mathlib/compressed_vector.h"
+#include "materialsystem/imaterialsystem.h"
+#include "materialsystem/imaterial.h"
+#include "filesystem.h"
+#include "decal_private.h"
+#include "gl_model_private.h"
+
+
+#define MAX_DECALCLIPVERT		48
+
+
+class CDecalVert
+{
+public:
+	Vector		m_vPos;
+	int			m_decalIndex;		// used by the cache code
+
+	// These are the texcoords for the decal itself
+	Vector2D	m_ctCoords;
+	// Lightmap texcoords for the decal.
+	Vector2D	m_cLMCoords;
+};
+
+
+// Clip pOutVerts/nStartVerts into the decal's texture space.
+CDecalVert* R_DoDecalSHClip( 
+	CDecalVert *pInVerts,
+	CDecalVert *pOutVerts, 
+	decal_t *pDecal, 
+	int nStartVerts,
+	const Vector &vecNormal );
+
+// Generate clipped vertex list for decal pdecal projected onto polygon psurf
+CDecalVert* R_DecalVertsClip( 
+	CDecalVert *pOutVerts, 
+	decal_t *pDecal, 
+	SurfaceHandle_t surfID, 
+	IMaterial *pMaterial );
+
+// Compute the unscaled basis for the decal.
+void R_DecalComputeBasis( 
+	Vector const& surfaceNormal, 
+	Vector const* pSAxis, 
+	Vector* textureSpaceBasis );
+
+// Compute the basis for the decal and scale the axes so the whole decal fits
+// into the (0,0) - (1,1) range.
+void R_SetupDecalTextureSpaceBasis(
+	decal_t *pDecal,
+	Vector &vSurfNormal,
+	IMaterial *pMaterial,
+	Vector textureSpaceBasis[3],
+	float decalWorldScale[2] );
+
+extern ALIGN16 CDecalVert g_DecalClipVerts[MAX_DECALCLIPVERT] ALIGN16_POST;
+
+#endif // DECAL_CLIP_H