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game/client/c_testtraceline.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "materialsystem/imesh.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+// -------------------------------------------------------------------------------- //
+// An entity used to test traceline
+// -------------------------------------------------------------------------------- //
+class C_TestTraceline : public C_BaseEntity
+{
+public:
+	DECLARE_CLASS( C_TestTraceline, C_BaseEntity );
+	DECLARE_CLIENTCLASS();
+
+					C_TestTraceline();
+	virtual			~C_TestTraceline();
+
+// IClientEntity overrides.
+public:
+	virtual int			DrawModel( int flags );
+	virtual bool		ShouldDraw() { return true; }
+
+private:
+	void DrawCube( Vector& center, unsigned char* pColor );
+	IMaterial* m_pWireframe;
+};
+
+// Expose it to the engine.
+IMPLEMENT_CLIENTCLASS(C_TestTraceline, DT_TestTraceline, CTestTraceline);
+
+BEGIN_RECV_TABLE_NOBASE(C_TestTraceline, DT_TestTraceline)
+	RecvPropInt(RECVINFO(m_clrRender)),
+	RecvPropVector( RECVINFO_NAME( m_vecNetworkOrigin, m_vecOrigin ) ),
+	RecvPropFloat( RECVINFO_NAME( m_angNetworkAngles[0], m_angRotation[0] ) ),
+	RecvPropFloat( RECVINFO_NAME( m_angNetworkAngles[1], m_angRotation[1] ) ),
+	RecvPropFloat( RECVINFO_NAME( m_angNetworkAngles[2], m_angRotation[2] ) ),
+	RecvPropInt( RECVINFO_NAME(m_hNetworkMoveParent, moveparent), 0, RecvProxy_IntToMoveParent ),
+END_RECV_TABLE()
+
+
+// -------------------------------------------------------------------------------- //
+// Functions.
+// -------------------------------------------------------------------------------- //
+
+C_TestTraceline::C_TestTraceline()
+{
+	m_pWireframe = materials->FindMaterial("shadertest/wireframevertexcolor", TEXTURE_GROUP_OTHER);
+}
+
+C_TestTraceline::~C_TestTraceline()
+{
+}
+
+
+enum
+{
+	CUBE_SIZE = 5
+};
+
+void C_TestTraceline::DrawCube( Vector& center, unsigned char* pColor )
+{
+	Vector facePoints[8];
+	Vector bmins, bmaxs;
+
+	bmins[0] = center[0] - CUBE_SIZE;
+	bmins[1] = center[1] - CUBE_SIZE;
+	bmins[2] = center[2] - CUBE_SIZE;
+
+	bmaxs[0] = center[0] + CUBE_SIZE;
+	bmaxs[1] = center[1] + CUBE_SIZE;
+	bmaxs[2] = center[2] + CUBE_SIZE;
+
+	facePoints[0][0] = bmins[0];
+	facePoints[0][1] = bmins[1];
+	facePoints[0][2] = bmins[2];
+
+	facePoints[1][0] = bmins[0];
+	facePoints[1][1] = bmins[1];
+	facePoints[1][2] = bmaxs[2];
+
+	facePoints[2][0] = bmins[0];
+	facePoints[2][1] = bmaxs[1];
+	facePoints[2][2] = bmins[2];
+
+	facePoints[3][0] = bmins[0];
+	facePoints[3][1] = bmaxs[1];
+	facePoints[3][2] = bmaxs[2];
+
+	facePoints[4][0] = bmaxs[0];
+	facePoints[4][1] = bmins[1];
+	facePoints[4][2] = bmins[2];
+
+	facePoints[5][0] = bmaxs[0];
+	facePoints[5][1] = bmins[1];
+	facePoints[5][2] = bmaxs[2];
+
+	facePoints[6][0] = bmaxs[0];
+	facePoints[6][1] = bmaxs[1];
+	facePoints[6][2] = bmins[2];
+
+	facePoints[7][0] = bmaxs[0];
+	facePoints[7][1] = bmaxs[1];
+	facePoints[7][2] = bmaxs[2];
+
+	int nFaces[6][4] =
+	{
+		{ 0, 2, 3, 1 },
+		{ 0, 1, 5, 4 },
+		{ 4, 5, 7, 6 },
+		{ 2, 6, 7, 3 },
+		{ 1, 3, 7, 5 },
+		{ 0, 4, 6, 2 }
+	};
+
+	for (int nFace = 0; nFace < 6; nFace++)
+	{
+		int nP1, nP2, nP3, nP4;
+
+		nP1 = nFaces[nFace][0];
+		nP2 = nFaces[nFace][1];
+		nP3 = nFaces[nFace][2];
+		nP4 = nFaces[nFace][3];
+
+		// Draw the face.
+		CMeshBuilder meshBuilder;
+		CMatRenderContextPtr pRenderContext( materials );
+		IMesh* pMesh = pRenderContext->GetDynamicMesh();
+		meshBuilder.DrawQuad( pMesh, facePoints[nP1].Base(), facePoints[nP2].Base(), 
+			facePoints[nP3].Base(), facePoints[nP4].Base(), pColor, true );
+	}
+}
+
+int C_TestTraceline::DrawModel( int flags )
+{
+	trace_t tr;
+	Vector forward, right, up, endpos, hitpos;
+	AngleVectors (GetAbsAngles(), &forward, &right, &up);
+	endpos = GetAbsOrigin() + forward * MAX_TRACE_LENGTH;
+
+	UTIL_TraceLine( GetAbsOrigin(), endpos, MASK_SOLID_BRUSHONLY, NULL, COLLISION_GROUP_NONE, &tr );
+
+	CMatRenderContextPtr pRenderContext( materials );
+	IMesh* pMesh = pRenderContext->GetDynamicMesh( true, NULL, NULL, m_pWireframe );
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, 1 );
+
+	meshBuilder.Position3fv( GetAbsOrigin().Base() );
+	meshBuilder.Color3ub( 255, 255, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( tr.endpos.Base() );
+	meshBuilder.Color3ub( 255, 255, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+	pMesh->Draw();
+
+	// Didn't hit anything
+	if ( tr.fraction != 1.0 )
+	{
+		unsigned char color[] = { 0, 255, 0 };
+		DrawCube( tr.endpos, color );
+	}
+
+	if ( (!tr.allsolid) && (tr.fractionleftsolid != 0.0) )
+	{
+		unsigned char color[] = { 255, 0, 0 };
+		DrawCube( tr.startpos, color );
+	}
+
+	return 1;
+}