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utils/studiomdl/checkuv.h

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+//============ Copyright (c) Valve Corporation, All rights reserved. ==========
+//
+//=============================================================================
+
+
+#pragma once
+
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+class CCheckUVCmd
+{
+public:
+	int m_nOptGutterTexWidth;	// Width of texture for gutter check
+	int m_nOptGutterTexHeight;	// Height of texture for gutter check
+	int m_nOptGutterMin;		// Minimum number of pixels between polygon islands in UV space
+
+	enum CheckMask_t
+	{
+		CHECK_UV_FLAG_NORMALIZED =	( 1 << 0 ),
+		CHECK_UV_FLAG_OVERLAP =		( 1 << 1 ),
+		CHECK_UV_FLAG_INVERSE =		( 1 << 2 ),
+		CHECK_UV_FLAG_GUTTER =		( 1 << 3 ),
+		CHECK_UV_ALL_FLAGS = ( CHECK_UV_FLAG_NORMALIZED | CHECK_UV_FLAG_OVERLAP | CHECK_UV_FLAG_INVERSE | CHECK_UV_FLAG_GUTTER )
+	};
+
+	int m_nOptChecks;
+
+	CCheckUVCmd();
+
+	void Clear();
+
+	bool DoCheck( CheckMask_t eCheckMask ) const	{ return ( m_nOptChecks & eCheckMask ) == eCheckMask; }
+	bool DoAnyCheck() const							{ return ( m_nOptChecks & CHECK_UV_ALL_FLAGS ) != 0; }
+	void SetCheck( CheckMask_t eCheckMask )			{ m_nOptChecks |= ( CHECK_UV_ALL_FLAGS & eCheckMask ); }
+	void ClearCheck( CheckMask_t eCheckMask )		{ m_nOptChecks &= ( CHECK_UV_ALL_FLAGS & ~eCheckMask ); }
+
+	bool CheckUVs( const struct s_source_t *const *pSourceList, int nSourceCount ) const;
+
+	// Check that all UVs are in the [0, 1] range
+	bool CheckNormalized( const struct s_source_t *pSource ) const;
+	// Check that all polygons in UV do not overlap
+	bool CheckOverlap( const struct s_source_t *pSource ) const;
+	// Check that all polygons in UV have the correct winding, i.e. the cross
+	// product of edge AB x BC points the right direction
+	bool CheckInverse( const struct s_source_t *pSource ) const;
+	// Check that the distance between edges in UV islands is a minimum number of pixels for a given texture size
+	bool CheckGutter( const struct s_source_t *pSource ) const;
+
+	// Returns barycentric coordinates Vector( u, v, w ) for point vP with respect to triangle ( vA, vB, vC )
+	static Vector Barycentric( const Vector2D &vP, const Vector2D &vA, const Vector2D &vB, const Vector2D &vC );
+	static Vector Barycentric( const Vector &vP, const Vector &vA, const Vector &vB, const Vector &vC );
+
+	static int FindMeshIndex( const struct s_source_t *pSource, int nFaceIndex );
+	static void PrintVertex( const struct s_vertexinfo_t &v, const char *pszPrefix = "       " );
+	static void PrintVertex( const struct s_vertexinfo_t &v, const struct s_texture_t &t, const char *pszPrefix = "       " );
+	static void PrintFace( const s_source_t *pSource, const int nMesh, const int nFace, const char *pszPrefix = "       " );
+};