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//========= Copyright � 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
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