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game/client/c_tracer.h

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+//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+#ifndef C_TRACER_H
+#define C_TRACER_H
+
+class Vector;
+class ParticleDraw;
+class CMeshBuilder;
+
+//-----------------------------------------------------------------------------
+// Tracer_Draw(): draws a tracer, assuming the modelview matrix is identity
+// This function accepts all arguments in CAMERA (pre-projected) space
+//
+// arguments
+//		[in] Vector& : The origin of the tracer (CAMERA space)
+//		[in] Vector& : The direction and length of the tracer (CAMERA space)
+//		[in] float  : The tracer width (CAMERA space)
+//		[in] float* : r, g, b, a (0 - 1)
+//-----------------------------------------------------------------------------
+void Tracer_Draw( ParticleDraw* pDraw, Vector const& start, Vector const& delta, 
+				 float width, float* color, float startV = 0.0, float endV = 1.0 );
+
+void Tracer_Draw( CMeshBuilder *pMeshBuilder, Vector const& start, Vector const& delta, float width, float* color, float startV = 0.0, float endV = 1.0 );
+
+
+//-----------------------------------------------------------------------------
+// Computes the four verts to draw the tracer with, in the following order:
+//	start vertex left side, start vertex right side 
+//	end vertex left side, end vertex right side 
+// returne false if the tracer is offscreen
+//-----------------------------------------------------------------------------
+bool Tracer_ComputeVerts( const Vector &start, const Vector &delta, float width, Vector *pVerts );
+
+#endif // C_TRACER_H