CMeshBuilder

From Valve Developer Community
Jump to: navigation, search

The CMeshBuilder can be used to draw primitives. In most cases it is required that you call CMeshBuilder inside of DrawModel. Also, DrawModel will only be called for your C_BaseEntity if you have the ShouldDraw function return true.

#ifdef CLIENT_DLL
	virtual bool	ShouldDraw() { return true; }
	virtual int	DrawModel( int flags );
#endif


#ifdef CLIENT_DLL
//-----------------------------------------------------------------------------
// Purpose: Override to allow us to draw motion blur quads
//-----------------------------------------------------------------------------
int YourClass::DrawModel( int flags )
{
// Do something here to get your vectors....

	CMatRenderContextPtr pRenderContext( materials );
	IMesh *pMesh;
//Must be bound before the call to get the mesh
	pRenderContext->Bind( pBlurMaterial );
	pMesh = pRenderContext->GetDynamicMesh();

	CMeshBuilder meshBuilder;
	meshBuilder.Begin( pMesh, MATERIAL_QUADS, 1 );

	meshBuilder.Color3f( 1.0f, 1.0f, 1.0f );
	meshBuilder.TexCoord2f( 0,0,0 );
	meshBuilder.Position3f( posL.x,posL.y,posL.z );
	meshBuilder.AdvanceVertex();

	meshBuilder.Color3f( 1.0f, 1.0f, 1.0f );
	meshBuilder.TexCoord2f( 0,1,0 );
	meshBuilder.Position3f( posR.x,posR.y,posR.z );
	meshBuilder.AdvanceVertex();

	meshBuilder.Color3f( 1.0f, 1.0f, 1.0f );
	meshBuilder.TexCoord2f( 0,1,1 );
	meshBuilder.Position3f( oldPosL.x, oldPosL.y, oldPosL.z );
	meshBuilder.AdvanceVertex();

        meshBuilder.Color3f( 1.0f, 1.0f, 1.0f );
	meshBuilder.TexCoord2f( 0,0,1 );
        meshBuilder.Position3f( oldPosR.x, oldPosR.y, oldPosR.z );
	meshBuilder.AdvanceVertex();
	meshBuilder.End();
	pMesh->Draw();

	}
	return BaseClass::DrawModel( flags );
}
#endif