1HEADmaster

1 files changed, 916 insertions, 0 deletions

diff --git a/tier2/renderutils.cpp b/tier2/renderutils.cpp
new file mode 100644
index 0000000..41b8bc6
--- /dev/null
+++ b/tier2/renderutils.cpp
@@ -0,0 +1,916 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A set of utilities to render standard shapes
+//
+//===========================================================================//
+
+#include "tier2/renderutils.h"
+#include "tier2/tier2.h"
+#include "tier1/KeyValues.h"
+#include "materialsystem/imaterialsystem.h"
+#include "materialsystem/imesh.h"
+#include "materialsystem/imaterial.h"
+#include "tier0/vprof.h"
+#include "tier0/basetypes.h"
+#include "togl/rendermechanism.h"
+
+#if !defined(M_PI)
+	#define M_PI			3.14159265358979323846
+#endif
+
+//-----------------------------------------------------------------------------
+// Globals
+//-----------------------------------------------------------------------------
+static bool s_bMaterialsInitialized = false;
+static IMaterial *s_pWireframe;
+static IMaterial *s_pWireframeIgnoreZ;
+static IMaterial *s_pVertexColor;
+static IMaterial *s_pVertexColorIgnoreZ;
+
+
+//-----------------------------------------------------------------------------
+// Initializes standard materials
+//-----------------------------------------------------------------------------
+void InitializeStandardMaterials()
+{
+	if ( s_bMaterialsInitialized )
+		return;
+
+	s_bMaterialsInitialized = true;
+
+	KeyValues *pVMTKeyValues = new KeyValues( "wireframe" );
+	pVMTKeyValues->SetInt( "$vertexcolor", 1 );
+	s_pWireframe = g_pMaterialSystem->CreateMaterial( "__utilWireframe", pVMTKeyValues );
+
+	pVMTKeyValues = new KeyValues( "wireframe" );
+	pVMTKeyValues->SetInt( "$vertexcolor", 1 );
+	pVMTKeyValues->SetInt( "$vertexalpha", 1 );
+	pVMTKeyValues->SetInt( "$ignorez", 1 );
+	s_pWireframeIgnoreZ = g_pMaterialSystem->CreateMaterial( "__utilWireframeIgnoreZ", pVMTKeyValues );
+
+	pVMTKeyValues = new KeyValues( "unlitgeneric" );
+	pVMTKeyValues->SetInt( "$vertexcolor", 1 );
+	pVMTKeyValues->SetInt( "$vertexalpha", 1 );
+	s_pVertexColor = g_pMaterialSystem->CreateMaterial( "__utilVertexColor", pVMTKeyValues );
+
+	pVMTKeyValues = new KeyValues( "unlitgeneric" );
+	pVMTKeyValues->SetInt( "$vertexcolor", 1 );
+	pVMTKeyValues->SetInt( "$vertexalpha", 1 );
+	pVMTKeyValues->SetInt( "$ignorez", 1 );
+	s_pVertexColorIgnoreZ = g_pMaterialSystem->CreateMaterial( "__utilVertexColorIgnoreZ", pVMTKeyValues );
+}
+
+void ShutdownStandardMaterials()
+{
+	if ( !s_bMaterialsInitialized )
+		return;
+
+	s_bMaterialsInitialized = false;
+
+	s_pWireframe->DecrementReferenceCount();
+	s_pWireframe = NULL;
+
+	s_pWireframeIgnoreZ->DecrementReferenceCount();
+	s_pWireframeIgnoreZ = NULL;
+
+	s_pVertexColor->DecrementReferenceCount();
+	s_pVertexColor = NULL;
+
+	s_pVertexColorIgnoreZ->DecrementReferenceCount();
+	s_pVertexColorIgnoreZ = NULL;
+}
+
+
+//-----------------------------------------------------------------------------
+// Renders a wireframe sphere
+//-----------------------------------------------------------------------------
+void RenderWireframeSphere( const Vector &vCenter, float flRadius, int nTheta, int nPhi, Color c, bool bZBuffer )
+{
+	InitializeStandardMaterials();
+
+	// Make one more coordinate because (u,v) is discontinuous.
+	++nTheta;
+
+	int nVertices = nPhi * nTheta; 
+	int nIndices = ( nTheta - 1 ) * 4 * ( nPhi - 1 );
+
+	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
+	pRenderContext->Bind( bZBuffer ? s_pWireframe : s_pWireframeIgnoreZ );
+
+	CMeshBuilder meshBuilder;
+	IMesh* pMesh = pRenderContext->GetDynamicMesh();
+
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, nVertices, nIndices );
+
+	unsigned char chRed = c.r();
+	unsigned char chGreen = c.g();
+	unsigned char chBlue = c.b();
+	unsigned char chAlpha = c.a();
+
+	int i, j;
+	for ( i = 0; i < nPhi; ++i )
+	{
+		for ( j = 0; j < nTheta; ++j )
+		{
+			float u = j / ( float )( nTheta - 1 );
+			float v = i / ( float )( nPhi - 1 );
+			float theta = 2.0f * M_PI * u;
+			float phi = M_PI * v;
+
+			meshBuilder.Position3f( vCenter.x + ( flRadius * sin(phi) * cos(theta) ),
+				vCenter.y + ( flRadius * sin(phi) * sin(theta) ), 
+				vCenter.z + ( flRadius * cos(phi) ) );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	for ( i = 0; i < nPhi - 1; ++i )
+	{
+		for ( j = 0; j < nTheta - 1; ++j )
+		{
+			int idx = nTheta * i + j;
+
+			meshBuilder.Index( idx );
+			meshBuilder.AdvanceIndex();
+
+			meshBuilder.Index( idx + nTheta );
+			meshBuilder.AdvanceIndex();
+
+			meshBuilder.Index( idx );
+			meshBuilder.AdvanceIndex();
+
+			meshBuilder.Index( idx + 1 );
+			meshBuilder.AdvanceIndex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+//-----------------------------------------------------------------------------
+// Draws a sphere
+//-----------------------------------------------------------------------------
+void RenderSphere( const Vector &vCenter, float flRadius, int nTheta, int nPhi, Color c, IMaterial *pMaterial )
+{
+	InitializeStandardMaterials();
+
+	CMatRenderContextPtr pRenderContext( materials );
+
+	unsigned char chRed = c.r();
+	unsigned char chGreen = c.g();
+	unsigned char chBlue = c.b();
+	unsigned char chAlpha = c.a();
+
+	// Two extra degenerate triangles per row (except the last one)
+	int nTriangles = 2 * nTheta * ( nPhi - 1 ); 
+	int nIndices = 2 * ( nTheta + 1 ) * ( nPhi - 1 );
+	if ( nTriangles == 0 )
+		return;
+
+	pRenderContext->Bind( pMaterial );
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+	CMeshBuilder meshBuilder;
+
+	meshBuilder.Begin( pMesh, MATERIAL_TRIANGLE_STRIP, nTriangles, nIndices );
+
+	// Build the index buffer.
+	float flOONPhi = 1.0f / (nPhi-1);
+	float flOONTheta = 1.0f / (nTheta-1);
+
+	int i, j;
+	for ( i = 0; i < nPhi; ++i )
+	{
+		for ( j = 0; j < nTheta; ++j )
+		{
+			float u = j / ( float )( nTheta - 1 );
+			float v = i / ( float )( nPhi - 1 );
+			float theta = 2.0f * M_PI * u;
+			float phi = M_PI * v;
+
+			Vector vecPos;
+			vecPos.x = flRadius * sin(phi) * cos(theta);
+			vecPos.y = flRadius * sin(phi) * sin(theta); 
+			vecPos.z = flRadius * cos(phi);
+
+			Vector vecNormal = vecPos;
+			VectorNormalize(vecNormal);
+
+			vecPos += vCenter;
+
+			meshBuilder.Position3f( vecPos.x, vecPos.y, vecPos.z );
+			meshBuilder.Normal3f( vecNormal.x, vecNormal.y, vecNormal.z );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.TexCoord2f( 0, j * flOONTheta, i * flOONPhi );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	// Emit the triangle strips.
+	int idx = 0;
+	for ( i = 0; i < nPhi - 1; ++i )
+	{
+		for ( j = 0; j < nTheta; ++j )
+		{
+			idx = nTheta * i + j;
+
+			meshBuilder.Index( idx + nTheta );
+			meshBuilder.AdvanceIndex();
+
+			meshBuilder.Index( idx );
+			meshBuilder.AdvanceIndex();
+		}
+
+		// Emit a degenerate triangle to skip to the next row without a connecting triangle
+		if ( i < nPhi - 2 )
+		{
+			meshBuilder.Index( idx );
+			meshBuilder.AdvanceIndex();
+
+			meshBuilder.Index( idx + nTheta + 1 );
+			meshBuilder.AdvanceIndex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+void RenderSphere( const Vector &vCenter, float flRadius, int nTheta, int nPhi, Color c, bool bZBuffer )
+{
+	IMaterial *pMaterial = bZBuffer ? s_pVertexColor : s_pVertexColorIgnoreZ;
+	Color cActual( c.r(), c.g(), c.b(), c.a() );
+	RenderSphere( vCenter, flRadius, nTheta, nPhi, cActual, pMaterial );
+}
+
+
+//-----------------------------------------------------------------------------
+// Box vertices
+//-----------------------------------------------------------------------------
+static int s_pBoxFaceIndices[6][4] = 
+{
+	{ 0, 4, 6, 2 }, // -x
+	{ 5, 1, 3, 7 }, // +x
+	{ 0, 1, 5, 4 }, // -y
+	{ 2, 6, 7, 3 }, // +y
+	{ 0, 2, 3, 1 },	// -z
+	{ 4, 5, 7, 6 }	// +z
+};
+
+static int s_pBoxFaceIndicesInsideOut[6][4] = 
+{
+	{ 0, 2, 6, 4 }, // -x
+	{ 5, 7, 3, 1 }, // +x
+	{ 0, 4, 5, 1 }, // -y
+	{ 2, 3, 7, 6 }, // +y
+	{ 0, 1, 3, 2 },	// -z
+	{ 4, 6, 7, 5 }	// +z
+};
+
+static void GenerateBoxVertices( const Vector &vOrigin, const QAngle& angles, const Vector &vMins, const Vector &vMaxs, Vector pVerts[8] )
+{
+	// Build a rotation matrix from orientation
+	matrix3x4_t fRotateMatrix;
+	AngleMatrix( angles, fRotateMatrix );
+
+	Vector vecPos;
+	for ( int i = 0; i < 8; ++i )
+	{
+		vecPos[0] = ( i & 0x1 ) ? vMaxs[0] : vMins[0];
+		vecPos[1] = ( i & 0x2 ) ? vMaxs[1] : vMins[1];
+		vecPos[2] = ( i & 0x4 ) ? vMaxs[2] : vMins[2];
+
+		VectorRotate( vecPos, fRotateMatrix, pVerts[i] );
+		pVerts[i] += vOrigin;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Renders a wireframe box relative to an origin 
+//-----------------------------------------------------------------------------
+void RenderWireframeBox( const Vector &vOrigin, const QAngle& angles, const Vector &vMins, const Vector &vMaxs, Color c, bool bZBuffer )
+{
+	InitializeStandardMaterials();
+
+	CMatRenderContextPtr pRenderContext( materials );
+	pRenderContext->Bind( bZBuffer ? s_pWireframe : s_pWireframeIgnoreZ );
+
+	Vector p[8];
+	GenerateBoxVertices( vOrigin, angles, vMins, vMaxs, p );
+
+	unsigned char chRed = c.r();
+	unsigned char chGreen = c.g();
+	unsigned char chBlue = c.b();
+	unsigned char chAlpha = c.a();
+
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, 24 );
+
+	// Draw the box
+	for ( int i = 0; i < 6; i++ )
+	{
+		int *pFaceIndex = s_pBoxFaceIndices[i];
+
+		for ( int j = 0; j < 4; ++j )
+		{
+			meshBuilder.Position3fv( p[pFaceIndex[j]].Base() );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( p[pFaceIndex[ (j == 3) ? 0 : j+1 ] ].Base() );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+//-----------------------------------------------------------------------------
+// Renders a solid box 
+//-----------------------------------------------------------------------------
+void RenderBox( const Vector& vOrigin, const QAngle& angles, const Vector& vMins, const Vector& vMaxs, Color c, IMaterial *pMaterial, bool bInsideOut )
+{
+	InitializeStandardMaterials();
+
+	CMatRenderContextPtr pRenderContext( materials );
+	pRenderContext->Bind( pMaterial );
+
+	Vector p[8];
+	GenerateBoxVertices( vOrigin, angles, vMins, vMaxs, p );
+
+	unsigned char chRed = c.r();
+	unsigned char chGreen = c.g();
+	unsigned char chBlue = c.b();
+	unsigned char chAlpha = c.a();
+
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, 12 );
+
+	// Draw the box
+	Vector vecNormal;
+	for ( int i = 0; i < 6; i++ )
+	{
+		vecNormal.Init();
+		vecNormal[ i/2 ] = ( i & 0x1 ) ? 1.0f : -1.0f;
+				 
+		int *ppFaceIndices = bInsideOut ? s_pBoxFaceIndicesInsideOut[i] : s_pBoxFaceIndices[i];
+		for ( int j = 1; j < 3; ++j )
+		{
+			int i0 = ppFaceIndices[0];
+			int i1 = ppFaceIndices[j];
+			int i2 = ppFaceIndices[j+1];
+
+			meshBuilder.Position3fv( p[i0].Base() );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.Normal3fv( vecNormal.Base() );
+			meshBuilder.TexCoord2f( 0, 0.0f, 0.0f );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( p[i2].Base() );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.Normal3fv( vecNormal.Base() );
+			meshBuilder.TexCoord2f( 0, 1.0f, ( j == 1 ) ? 1.0f : 0.0f );
+			meshBuilder.AdvanceVertex();
+
+			meshBuilder.Position3fv( p[i1].Base() );
+			meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+			meshBuilder.Normal3fv( vecNormal.Base() );
+			meshBuilder.TexCoord2f( 0, ( j == 1 ) ? 0.0f : 1.0f, 1.0f );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+void RenderBox( const Vector& vOrigin, const QAngle& angles, const Vector& vMins, const Vector& vMaxs, Color c, bool bZBuffer, bool bInsideOut )
+{
+	IMaterial *pMaterial = bZBuffer ? s_pVertexColor : s_pVertexColorIgnoreZ;
+	Color cActual( c.r(), c.g(), c.b(), c.a() );
+	RenderBox( vOrigin, angles, vMins, vMaxs, cActual, pMaterial, bInsideOut );
+}
+
+
+//-----------------------------------------------------------------------------
+// Renders axes, red->x, green->y, blue->z
+//-----------------------------------------------------------------------------
+void RenderAxes( const Vector &vOrigin, float flScale, bool bZBuffer )
+{
+	InitializeStandardMaterials();
+
+	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
+	pRenderContext->Bind( bZBuffer ? s_pWireframe : s_pWireframeIgnoreZ );
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, 3 );
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y, vOrigin.z );
+	meshBuilder.Color4ub( 255, 0, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x + flScale, vOrigin.y, vOrigin.z );
+	meshBuilder.Color4ub( 255, 0, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y, vOrigin.z );
+	meshBuilder.Color4ub( 0, 255, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y + flScale, vOrigin.z );
+	meshBuilder.Color4ub( 0, 255, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y, vOrigin.z );
+	meshBuilder.Color4ub( 0, 0, 255, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y, vOrigin.z + flScale );
+	meshBuilder.Color4ub( 0, 0, 255, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+void RenderAxes( const matrix3x4_t &transform, float flScale, bool bZBuffer )
+{
+	InitializeStandardMaterials();
+
+	Vector xAxis, yAxis, zAxis, vOrigin, temp;
+	MatrixGetColumn( transform, 0, xAxis );
+	MatrixGetColumn( transform, 1, yAxis );
+	MatrixGetColumn( transform, 2, zAxis );
+	MatrixGetColumn( transform, 3, vOrigin );
+
+	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
+	pRenderContext->Bind( bZBuffer ? s_pWireframe : s_pWireframeIgnoreZ );
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, 3 );
+
+	meshBuilder.Position3fv( vOrigin.Base() );
+	meshBuilder.Color4ub( 255, 0, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	VectorMA( vOrigin, flScale, xAxis, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( 255, 0, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y, vOrigin.z );
+	meshBuilder.Color4ub( 0, 255, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	VectorMA( vOrigin, flScale, yAxis, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( 0, 255, 0, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3f( vOrigin.x, vOrigin.y, vOrigin.z );
+	meshBuilder.Color4ub( 0, 0, 255, 255 );
+	meshBuilder.AdvanceVertex();
+
+	VectorMA( vOrigin, flScale, zAxis, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( 0, 0, 255, 255 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+//-----------------------------------------------------------------------------
+// Render a line
+//-----------------------------------------------------------------------------
+void RenderLine( const Vector& v1, const Vector& v2, Color c, bool bZBuffer )
+{
+	InitializeStandardMaterials();
+
+	CMatRenderContextPtr pRenderContext( materials );
+	pRenderContext->Bind( bZBuffer ? s_pWireframe : s_pWireframeIgnoreZ );
+
+	unsigned char chRed = c.r();
+	unsigned char chGreen = c.g();
+	unsigned char chBlue = c.b();
+	unsigned char chAlpha = c.a();
+
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, 1 );
+
+	meshBuilder.Position3fv( v1.Base() );
+	meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( v2.Base() );
+	meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+//-----------------------------------------------------------------------------
+// Draws a triangle
+//-----------------------------------------------------------------------------
+void RenderTriangle( const Vector& p1, const Vector& p2, const Vector& p3, Color c, IMaterial *pMaterial )
+{
+	InitializeStandardMaterials();
+
+	CMatRenderContextPtr pRenderContext( materials );
+	pRenderContext->Bind( pMaterial );
+
+	unsigned char chRed = c.r();
+	unsigned char chGreen = c.g();
+	unsigned char chBlue = c.b();
+	unsigned char chAlpha = c.a();
+
+	Vector vecNormal;
+	Vector vecDelta1, vecDelta2;
+	VectorSubtract( p2, p1, vecDelta1 );
+	VectorSubtract( p3, p1, vecDelta2 );
+	CrossProduct( vecDelta1, vecDelta2, vecNormal );
+	VectorNormalize( vecNormal );
+
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, 1 );
+
+	meshBuilder.Position3fv( p1.Base() );
+	meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+	meshBuilder.Normal3fv( vecNormal.Base() );
+	meshBuilder.TexCoord2f( 0, 0.0f, 0.0f );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( p2.Base() );
+	meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+	meshBuilder.Normal3fv( vecNormal.Base() );
+	meshBuilder.TexCoord2f( 0, 0.0f, 1.0f );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( p3.Base() );
+	meshBuilder.Color4ub( chRed, chGreen, chBlue, chAlpha );
+	meshBuilder.Normal3fv( vecNormal.Base() );
+	meshBuilder.TexCoord2f( 0, 1.0f, 0.0f );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+void RenderTriangle( const Vector& p1, const Vector& p2, const Vector& p3, Color c, bool bZBuffer )
+{
+	IMaterial *pMaterial = bZBuffer ? s_pVertexColor : s_pVertexColorIgnoreZ;
+	Color cActual( c.r(), c.g(), c.b(), c.a() );
+	RenderTriangle( p1, p2, p3, cActual, pMaterial );
+}
+
+
+
+//-----------------------------------------------------------------------------
+// Renders an extruded box
+//-----------------------------------------------------------------------------
+static void DrawAxes( const Vector& origin, Vector* pts, int idx, Color c, CMeshBuilder& meshBuilder )
+{
+	Vector start, temp;
+	VectorAdd( pts[idx], origin, start );
+	meshBuilder.Position3fv( start.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	int endidx = (idx & 0x1) ? idx - 1 : idx + 1;
+	VectorAdd( pts[endidx], origin, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( start.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	endidx = (idx & 0x2) ? idx - 2 : idx + 2;
+	VectorAdd( pts[endidx], origin, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( start.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	endidx = (idx & 0x4) ? idx - 4 : idx + 4;
+	VectorAdd( pts[endidx], origin, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+}
+
+static void DrawExtrusionFace( const Vector& start, const Vector& end,
+							  Vector* pts, int idx1, int idx2, Color c, CMeshBuilder& meshBuilder )
+{
+	Vector temp;
+	VectorAdd( pts[idx1], start, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	VectorAdd( pts[idx2], start, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	VectorAdd( pts[idx2], end, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	VectorAdd( pts[idx1], end, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+
+	VectorAdd( pts[idx1], start, temp );
+	meshBuilder.Position3fv( temp.Base() );
+	meshBuilder.Color4ub( c.r(), c.g(), c.b(), c.a() );
+	meshBuilder.AdvanceVertex();
+}
+
+void RenderWireframeSweptBox( const Vector &vStart, const Vector &vEnd, const QAngle &angles, const Vector &vMins, const Vector &vMaxs, Color c, bool bZBuffer )
+{
+	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
+	pRenderContext->Bind( bZBuffer ? s_pWireframe : s_pWireframeIgnoreZ );
+
+	Color cActual( c.r(), c.g(), c.b(), c.a() );
+
+	// Build a rotation matrix from angles
+	matrix3x4_t fRotateMatrix;
+	AngleMatrix( angles, fRotateMatrix );
+
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( );
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_LINES, 30 );
+
+	Vector vDelta;
+	VectorSubtract( vEnd, vStart, vDelta );
+
+	// Compute the box points, rotated but without the origin added
+	Vector temp;
+	Vector pts[8];
+	float dot[8];
+	int minidx = 0;
+	for ( int i = 0; i < 8; ++i )
+	{
+		temp.x = (i & 0x1) ? vMaxs[0] : vMins[0];
+		temp.y = (i & 0x2) ? vMaxs[1] : vMins[1];
+		temp.z = (i & 0x4) ? vMaxs[2] : vMins[2];
+
+		// Rotate the corner point
+		VectorRotate( temp, fRotateMatrix, pts[i] );
+
+		// Find the dot product with dir
+		dot[i] = DotProduct( pts[i], vDelta );
+		if ( dot[i] < dot[minidx] )
+		{
+			minidx = i;
+		}
+	}
+
+	// Choose opposite corner
+	int maxidx = minidx ^ 0x7;
+
+	// Draw the start + end axes...
+	DrawAxes( vStart, pts, minidx, cActual, meshBuilder );
+	DrawAxes( vEnd, pts, maxidx, cActual, meshBuilder );
+
+	// Draw the extrusion faces
+	for (int j = 0; j < 3; ++j )
+	{
+		int dirflag1 = ( 1 << ((j+1)%3) );
+		int dirflag2 = ( 1 << ((j+2)%3) );
+
+		int idx1, idx2, idx3;
+		idx1 = (minidx & dirflag1) ? minidx - dirflag1 : minidx + dirflag1;
+		idx2 = (minidx & dirflag2) ? minidx - dirflag2 : minidx + dirflag2;
+		idx3 = (minidx & dirflag2) ? idx1 - dirflag2 : idx1 + dirflag2;
+
+		DrawExtrusionFace( vStart, vEnd, pts, idx1, idx3, cActual, meshBuilder );
+		DrawExtrusionFace( vStart, vEnd, pts, idx2, idx3, cActual, meshBuilder );
+	}
+	meshBuilder.End();
+	pMesh->Draw();
+}
+
+
+//-----------------------------------------------------------------------------
+// Draws a axis-aligned quad
+//-----------------------------------------------------------------------------
+void RenderQuad( IMaterial *pMaterial, float x, float y, float w, float h, 
+	float z, float s0, float t0, float s1, float t1, const Color& clr )
+{
+	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
+	IMesh *pMesh = pRenderContext->GetDynamicMesh( true, NULL, NULL, pMaterial );
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_QUADS, 1 );
+
+	meshBuilder.Color4ub( clr.r(), clr.g(), clr.b(), clr.a());
+	meshBuilder.TexCoord2f( 0, s0, t0 );
+	meshBuilder.Position3f( x, y, z );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Color4ub( clr.r(), clr.g(), clr.b(), clr.a());
+	meshBuilder.TexCoord2f( 0, s1, t0 );
+	meshBuilder.Position3f( x + w, y, z );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Color4ub( clr.r(), clr.g(), clr.b(), clr.a());
+	meshBuilder.TexCoord2f( 0, s1, t1 );
+	meshBuilder.Position3f( x + w, y + h, z );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Color4ub( clr.r(), clr.g(), clr.b(), clr.a());
+	meshBuilder.TexCoord2f( 0, s0, t1 );
+	meshBuilder.Position3f( x, y + h, z );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+
+	pMesh->Draw();
+}
+
+//-----------------------------------------------------------------------------
+// Renders a screen space quad
+//-----------------------------------------------------------------------------
+
+void DrawScreenSpaceRectangle( IMaterial *pMaterial, 
+								  int nDestX, int nDestY, int nWidth, int nHeight,	// Rect to draw into in screen space
+								  float flSrcTextureX0, float flSrcTextureY0,		// which texel you want to appear at destx/y
+								  float flSrcTextureX1, float flSrcTextureY1,		// which texel you want to appear at destx+width-1, desty+height-1
+								  int nSrcTextureWidth, int nSrcTextureHeight,		// needed for fixup
+								  void *pClientRenderable,							// Used to pass to the bind proxies
+								  int nXDice, int nYDice,							// Amount to tessellate the mesh
+								  float fDepth )									// what Z value to put in the verts (def 0.0)
+{
+	CMatRenderContextPtr pRenderContext( g_pMaterialSystem );
+
+	if ( ( nWidth <= 0 ) || ( nHeight <= 0 ) )
+		return;
+
+	tmZone( TELEMETRY_LEVEL1, TMZF_NONE, "%s", __FUNCTION__ );
+
+	pRenderContext->MatrixMode( MATERIAL_VIEW );
+	pRenderContext->PushMatrix();
+	pRenderContext->LoadIdentity();
+
+	pRenderContext->MatrixMode( MATERIAL_PROJECTION );
+	pRenderContext->PushMatrix();
+	pRenderContext->LoadIdentity();
+
+	pRenderContext->Bind( pMaterial, pClientRenderable );
+
+	int xSegments = max( nXDice, 1);
+	int ySegments = max( nYDice, 1);
+
+	CMeshBuilder meshBuilder;
+	
+	IMesh* pMesh = pRenderContext->GetDynamicMesh( true );
+	meshBuilder.Begin( pMesh, MATERIAL_QUADS, xSegments * ySegments );
+
+	int nScreenWidth, nScreenHeight;
+	pRenderContext->GetRenderTargetDimensions( nScreenWidth, nScreenHeight );
+
+	float flOffset = 0.5f;
+	
+	float flLeftX = nDestX - flOffset;
+	float flRightX = nDestX + nWidth - flOffset;
+
+	float flTopY = nDestY - flOffset;
+	float flBottomY = nDestY + nHeight - flOffset;
+
+	float flSubrectWidth = flSrcTextureX1 - flSrcTextureX0;
+	float flSubrectHeight = flSrcTextureY1 - flSrcTextureY0;
+
+	float flTexelsPerPixelX = ( nWidth > 1 ) ? flSubrectWidth / ( nWidth - 1 ) : 0.0f;
+	float flTexelsPerPixelY = ( nHeight > 1 ) ? flSubrectHeight / ( nHeight - 1 ) : 0.0f;
+
+	float flLeftU = flSrcTextureX0 + 0.5f - ( 0.5f * flTexelsPerPixelX );
+	float flRightU = flSrcTextureX1 + 0.5f + ( 0.5f * flTexelsPerPixelX );
+	float flTopV = flSrcTextureY0 + 0.5f - ( 0.5f * flTexelsPerPixelY );
+	float flBottomV = flSrcTextureY1 + 0.5f + ( 0.5f * flTexelsPerPixelY );
+
+	float flOOTexWidth = 1.0f / nSrcTextureWidth;
+	float flOOTexHeight = 1.0f / nSrcTextureHeight;
+	flLeftU *= flOOTexWidth;
+	flRightU *= flOOTexWidth;
+	flTopV *= flOOTexHeight;
+	flBottomV *= flOOTexHeight;
+
+	// Get the current viewport size
+	int vx, vy, vw, vh;
+	pRenderContext->GetViewport( vx, vy, vw, vh );
+
+	// map from screen pixel coords to -1..1
+	flRightX = FLerp( -1, 1, 0, vw, flRightX );
+	flLeftX = FLerp( -1, 1, 0, vw, flLeftX );
+	flTopY = FLerp( 1, -1, 0, vh ,flTopY );
+	flBottomY = FLerp( 1, -1, 0, vh, flBottomY );
+
+	// Dice the quad up...
+	if ( ( xSegments > 1 ) || ( ySegments > 1 ) )
+	{
+		// Screen height and width of a subrect
+		float flWidth  = (flRightX - flLeftX) / (float) xSegments;
+		float flHeight = (flTopY - flBottomY) / (float) ySegments;
+
+		// UV height and width of a subrect
+		float flUWidth  = (flRightU - flLeftU) / (float) xSegments;
+		float flVHeight = (flBottomV - flTopV) / (float) ySegments;
+
+		for ( int x=0; x < xSegments; x++ )
+		{
+			for ( int y=0; y < ySegments; y++ )
+			{
+				// Top left
+				meshBuilder.Position3f( flLeftX   + (float) x * flWidth, flTopY - (float) y * flHeight, fDepth );
+				meshBuilder.Normal3f( 0.0f, 0.0f, 1.0f );
+				meshBuilder.TexCoord2f( 0, flLeftU   + (float) x * flUWidth, flTopV + (float) y * flVHeight);
+				meshBuilder.TangentS3f( 0.0f, 1.0f, 0.0f );
+				meshBuilder.TangentT3f( 1.0f, 0.0f, 0.0f );
+				meshBuilder.AdvanceVertex();
+
+				// Top right (x+1)
+				meshBuilder.Position3f( flLeftX   + (float) (x+1) * flWidth, flTopY - (float) y * flHeight, fDepth );
+				meshBuilder.Normal3f( 0.0f, 0.0f, 1.0f );
+				meshBuilder.TexCoord2f( 0, flLeftU   + (float) (x+1) * flUWidth, flTopV + (float) y * flVHeight);
+				meshBuilder.TangentS3f( 0.0f, 1.0f, 0.0f );
+				meshBuilder.TangentT3f( 1.0f, 0.0f, 0.0f );
+				meshBuilder.AdvanceVertex();
+
+				// Bottom right (x+1), (y+1)
+				meshBuilder.Position3f( flLeftX   + (float) (x+1) * flWidth, flTopY - (float) (y+1) * flHeight, fDepth );
+				meshBuilder.Normal3f( 0.0f, 0.0f, 1.0f );
+				meshBuilder.TexCoord2f( 0, flLeftU   + (float) (x+1) * flUWidth, flTopV + (float)(y+1) * flVHeight);
+				meshBuilder.TangentS3f( 0.0f, 1.0f, 0.0f );
+				meshBuilder.TangentT3f( 1.0f, 0.0f, 0.0f );
+				meshBuilder.AdvanceVertex();
+
+				// Bottom left (y+1)
+				meshBuilder.Position3f( flLeftX   + (float) x * flWidth, flTopY - (float) (y+1) * flHeight, fDepth );
+				meshBuilder.Normal3f( 0.0f, 0.0f, 1.0f );
+				meshBuilder.TexCoord2f( 0, flLeftU   + (float) x * flUWidth, flTopV + (float)(y+1) * flVHeight);
+				meshBuilder.TangentS3f( 0.0f, 1.0f, 0.0f );
+				meshBuilder.TangentT3f( 1.0f, 0.0f, 0.0f );
+				meshBuilder.AdvanceVertex();
+			}
+		}
+	}
+	else // just one quad
+	{
+		for ( int corner=0; corner<4; corner++ )
+		{
+			bool bLeft = (corner==0) || (corner==3);
+			meshBuilder.Position3f( (bLeft) ? flLeftX : flRightX, (corner & 2) ? flBottomY : flTopY, fDepth );
+			meshBuilder.Normal3f( 0.0f, 0.0f, 1.0f );
+			meshBuilder.TexCoord2f( 0, (bLeft) ? flLeftU : flRightU, (corner & 2) ? flBottomV : flTopV );
+			meshBuilder.TangentS3f( 0.0f, 1.0f, 0.0f );
+			meshBuilder.TangentT3f( 1.0f, 0.0f, 0.0f );
+			meshBuilder.AdvanceVertex();
+		}
+	}
+
+	meshBuilder.End();
+	pMesh->Draw();
+
+	pRenderContext->MatrixMode( MATERIAL_VIEW );
+	pRenderContext->PopMatrix();
+
+	pRenderContext->MatrixMode( MATERIAL_PROJECTION );
+	pRenderContext->PopMatrix();
+}