1HEADmaster

1 files changed, 928 insertions, 0 deletions

diff --git a/utils/scratchpad3dviewer/scratchpad3dviewer.cpp b/utils/scratchpad3dviewer/scratchpad3dviewer.cpp
new file mode 100644
index 0000000..c31da71
--- /dev/null
+++ b/utils/scratchpad3dviewer/scratchpad3dviewer.cpp
@@ -0,0 +1,928 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "stdafx.h"
+#include "d3dapp.h"
+#include "d3dx8math.h"
+#include "mathlib/mathlib.h"
+#include "ScratchPad3D.h"
+#include "tier1/strtools.h"
+
+
+#define SPColorExpand( c ) (c).m_vColor.x, (c).m_vColor.y, (c).m_vColor.z, (c).m_flAlpha
+
+
+class VertPosDiffuse
+{
+public:
+	inline void		Init(Vector const &vPos, float r, float g, float b, float a)
+	{
+		m_Pos = vPos;
+		SetDiffuse( r, g, b, a );
+	}
+
+	inline void		SetDiffuse( float r, float g, float b, float a )
+	{
+		m_Diffuse[0] = (unsigned char)(b * 255.9f);
+		m_Diffuse[1] = (unsigned char)(g * 255.9f);
+		m_Diffuse[2] = (unsigned char)(r * 255.9f);
+		m_Diffuse[3] = (unsigned char)(a * 255.9f);
+	}
+
+	inline void		SetDiffuse( Vector const &vColor )
+	{
+		SetDiffuse( vColor.x, vColor.y, vColor.z, 1 );
+	}
+
+	inline void		SetTexCoords( const Vector2D &tCoords )
+	{
+		m_tCoords = tCoords;
+	}
+
+	static inline DWORD	GetFVF()	{return D3DFVF_DIFFUSE | D3DFVF_XYZ | D3DFVF_TEX1;}
+
+	Vector			m_Pos;
+	unsigned char	m_Diffuse[4];
+	Vector2D		m_tCoords;
+};
+
+class PosController
+{
+public:
+	Vector	m_vPos;
+	QAngle	m_vAngles;
+};
+
+int g_nLines, g_nPolygons;
+
+PosController	g_ViewController;
+Vector			g_IdentityBasis[3] = {Vector(1,0,0), Vector(0,1,0), Vector(0,0,1)};
+Vector			g_ViewerPos;
+Vector			g_ViewerBasis[3];
+VMatrix			g_mModelView;
+CScratchPad3D	*g_pScratchPad = NULL;
+FILETIME		g_LastWriteTime;
+char			g_Filename[256];
+
+
+// ------------------------------------------------------------------------------------------ //
+// Helper functions.
+// ------------------------------------------------------------------------------------------ //
+
+inline float FClamp(float val, float min, float max)
+{
+	return (val < min) ? min : (val > max ? max : val);
+}
+
+inline float FMin(float val1, float val2)
+{
+	return (val1 < val2) ? val1 : val2;
+}
+
+inline float FMax(float val1, float val2)
+{
+	return (val1 > val2) ? val1 : val2;
+}
+
+inline float CosDegrees(float angle)
+{
+	return (float)cos(DEG2RAD(angle));
+}
+
+inline float SinDegrees(float angle)
+{
+	return (float)sin(DEG2RAD(angle));
+}
+
+inline float FRand(float a, float b)
+{
+	return a + (b - a) * ((float)rand() / VALVE_RAND_MAX);
+}
+
+void CheckResult( HRESULT hr )
+{
+	if ( FAILED( hr ) )
+	{
+		Assert( 0 );
+	}
+}
+
+void DrawLine2(const Vector &vFrom, const Vector &vTo, float r1, float g1, float b1, float a1, float r2, float g2, float b2, float a2)
+{	
+	VertPosDiffuse verts[2];
+	
+	verts[0].Init( vFrom, r1, g1, b1, 1 );
+	verts[1].Init( vTo,   r2, g2, b2, 1 );
+
+	CheckResult ( g_pDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, FALSE ) );
+	CheckResult( g_pDevice->SetTexture( 0, NULL ) );
+	CheckResult( g_pDevice->DrawPrimitiveUP( D3DPT_LINELIST, 1, verts, sizeof(verts[0]) ) );
+
+	++g_nLines;
+}
+
+
+void DrawLine(const Vector &vFrom, const Vector &vTo, float r, float g, float b, float a)
+{
+	DrawLine2(vFrom, vTo, r,g,b,a, r,g,b,a);
+}
+
+
+// zAngle's range is [-90,90].
+// When zAngle is 0, the position is in the middle of the sphere (vertically).
+// When zAngle is  90, the position is at the top of the sphere.
+// When zAngle is -90, the position is at the bottom of the sphere.
+Vector CalcSphereVecAngles(float xyAngle, float zAngle, float fRadius)
+{
+	Vector vec;
+
+	vec.x = CosDegrees(xyAngle) * CosDegrees(zAngle);
+	vec.y = SinDegrees(xyAngle) * CosDegrees(zAngle);
+	vec.z = SinDegrees(zAngle);
+
+	return vec * fRadius;
+}
+
+
+// Figure out the rotation to look from vEye to vDest.
+void SetupLookAt( const Vector &vEye, const Vector &vDest, Vector basis[3] )
+{
+	basis[0] = (vDest - vEye);	// Forward.
+	VectorNormalize( basis[0] );
+	basis[2].Init(0.0f, 0.0f, 1.0f);		// Up.
+	
+	basis[1] = basis[2].Cross(basis[0]);	// Left.
+	VectorNormalize( basis[1] );
+	
+	basis[2] = basis[0].Cross(basis[1]);	// Regenerate up.
+	VectorNormalize( basis[2] );
+}
+
+
+D3DMATRIX* VEngineToTempD3DMatrix( VMatrix const &mat )
+{
+	static VMatrix ret;
+	ret = mat.Transpose();
+	return (D3DMATRIX*)&ret;
+}
+
+
+void UpdateView(float mouseDeltaX, float mouseDeltaY)
+{
+	VMatrix mRot;
+	PosController *pController;
+
+
+	pController = &g_ViewController;
+
+	// WorldCraft-like interface..
+	if( Sys_HasFocus() )
+	{
+		Vector vForward, vUp, vRight;
+		AngleVectors( pController->m_vAngles, &vForward, &vRight, &vUp );
+
+		static float fAngleScale = 0.4f;
+		static float fDistScale = 0.5f;
+
+		if( Sys_GetKeyState( APPKEY_LBUTTON ) )
+		{
+			if( Sys_GetKeyState( APPKEY_RBUTTON ) )
+			{
+				// Ok, move forward and backwards.
+				pController->m_vPos += vForward * -mouseDeltaY * fDistScale;
+				pController->m_vPos += vRight * mouseDeltaX * fDistScale;
+			}
+			else
+			{
+				pController->m_vAngles.y += -mouseDeltaX * fAngleScale;
+				pController->m_vAngles.x += mouseDeltaY * fAngleScale;
+			}
+		}
+		else if( Sys_GetKeyState( APPKEY_RBUTTON ) )
+		{
+			pController->m_vPos += vUp * -mouseDeltaY * fDistScale;
+			pController->m_vPos += vRight * mouseDeltaX * fDistScale;
+		}
+	}
+
+    // Set the projection matrix to 90 degrees.
+	D3DXMATRIX matProj;
+     D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/2, Sys_ScreenWidth() / (float)Sys_ScreenHeight(), 1.0f, 10000.0f );
+    g_pDevice->SetTransform( D3DTS_PROJECTION, &matProj );
+
+
+	// This matrix converts from D3D coordinates (X=right, Y=up, Z=forward)
+	// to VEngine coordinates (X=forward, Y=left, Z=up).
+	VMatrix mD3DToVEngine(
+		0.0f,  0.0f,  1.0f, 0.0f,
+		-1.0f, 0.0f,  0.0f,  0.0f,
+		0.0f,  1.0f,  0.0f,  0.0f,
+		0.0f,  0.0f,  0.0f,  1.0f);
+	
+	g_ViewerPos = pController->m_vPos;
+	mRot = SetupMatrixAngles( pController->m_vAngles );
+
+	g_mModelView = ~mD3DToVEngine * mRot.Transpose3x3() * SetupMatrixTranslation(-g_ViewerPos);
+
+	CheckResult( g_pDevice->SetTransform( D3DTS_VIEW, VEngineToTempD3DMatrix(g_mModelView) ) );
+
+	// World matrix is identity..
+	VMatrix mIdentity = SetupMatrixIdentity();
+	CheckResult( g_pDevice->SetTransform( D3DTS_WORLD, (D3DMATRIX*)&mIdentity ) );
+}
+
+
+// ------------------------------------------------------------------------------------------ //
+// ScratchPad3D command implementation.
+// ------------------------------------------------------------------------------------------ //
+
+void CommandRender_Point( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice )
+{
+	CScratchPad3D::CCommand_Point *pCmd = (CScratchPad3D::CCommand_Point*)pInCmd;
+	
+	g_pDevice->SetRenderState( D3DRS_POINTSIZE, *((DWORD*)&pCmd->m_flPointSize) );
+
+	VertPosDiffuse vert;
+	vert.Init( pCmd->m_Vert.m_vPos, SPColorExpand(pCmd->m_Vert.m_vColor) );
+
+	g_pDevice->DrawPrimitiveUP( D3DPT_POINTLIST, 1, &vert, sizeof(vert) );
+}
+
+
+VertPosDiffuse g_LineBatchVerts[1024];
+int g_nLineBatchVerts = 0;
+
+
+void CommandRender_LinesStart( IDirect3DDevice8 *pDevice )
+{
+	// Set states for line drawing.
+	CheckResult( g_pDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE ) );
+	CheckResult( g_pDevice->SetTexture( 0, NULL ) );
+}
+
+void CommandRender_LinesStop( IDirect3DDevice8 *pDevice )
+{
+	CheckResult( g_pDevice->DrawPrimitiveUP( D3DPT_LINELIST, g_nLineBatchVerts / 2, g_LineBatchVerts, sizeof(g_LineBatchVerts[0]) ) );
+	g_nLines += g_nLineBatchVerts / 2;
+	g_nLineBatchVerts = 0;
+}
+
+void CommandRender_Line( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice )
+{
+	CScratchPad3D::CCommand_Line *pCmd = (CScratchPad3D::CCommand_Line*)pInCmd;
+
+	// Flush out the line cache?
+	if ( g_nLineBatchVerts == sizeof( g_LineBatchVerts ) / sizeof( g_LineBatchVerts[0] ) )
+	{
+		CommandRender_LinesStop( pDevice );
+	}
+
+	g_LineBatchVerts[g_nLineBatchVerts].m_Pos = pCmd->m_Verts[0].m_vPos;
+	g_LineBatchVerts[g_nLineBatchVerts].SetDiffuse( SPColorExpand( pCmd->m_Verts[0].m_vColor ) );
+	++g_nLineBatchVerts;
+
+	g_LineBatchVerts[g_nLineBatchVerts].m_Pos = pCmd->m_Verts[1].m_vPos;
+	g_LineBatchVerts[g_nLineBatchVerts].SetDiffuse( SPColorExpand( pCmd->m_Verts[1].m_vColor ) );
+	++g_nLineBatchVerts;
+}
+
+
+void CommandRender_Polygon( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice )
+{
+	VertPosDiffuse verts[65];
+	CScratchPad3D::CCommand_Polygon *pCmd = (CScratchPad3D::CCommand_Polygon*)pInCmd;
+
+	int nVerts = min( 64, pCmd->m_Verts.Size() );
+	for( int i=0; i < nVerts; i++ )
+	{
+		verts[i].m_Pos[0] = pCmd->m_Verts[i].m_vPos.x;
+		verts[i].m_Pos[1] = pCmd->m_Verts[i].m_vPos.y;
+		verts[i].m_Pos[2] = pCmd->m_Verts[i].m_vPos.z;
+		verts[i].SetDiffuse( SPColorExpand( pCmd->m_Verts[i].m_vColor ) );
+	}
+
+	// Draw wireframe manually since D3D draws internal edges of the triangle fan.
+	DWORD dwFillMode;
+	g_pDevice->GetRenderState( D3DRS_FILLMODE, &dwFillMode );
+	if( dwFillMode == D3DFILL_WIREFRAME )
+	{
+		if( nVerts >= 2 )
+		{
+			g_pDevice->DrawPrimitiveUP( D3DPT_LINESTRIP, nVerts-1, verts, sizeof(verts[0]) );
+			
+			verts[nVerts] = verts[0];
+			g_pDevice->DrawPrimitiveUP( D3DPT_LINESTRIP, 1, &verts[nVerts-1], sizeof(verts[0]) );
+		}
+	}
+	else
+	{
+		CheckResult( g_pDevice->DrawPrimitiveUP( D3DPT_TRIANGLEFAN, nVerts - 2, verts, sizeof(verts[0]) ) );
+	}
+
+	++g_nPolygons;
+}
+
+void CommandRender_Matrix( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice )
+{
+	CScratchPad3D::CCommand_Matrix *pCmd = (CScratchPad3D::CCommand_Matrix*)pInCmd;
+
+	VMatrix mTransposed = pCmd->m_mMatrix.Transpose();
+	CheckResult( g_pDevice->SetTransform( D3DTS_WORLD, (D3DMATRIX*)mTransposed.m ) );
+}
+
+void CommandRender_RenderState( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice )
+{
+	CScratchPad3D::CCommand_RenderState *pCmd = (CScratchPad3D::CCommand_RenderState*)pInCmd;
+
+	switch( pCmd->m_State )
+	{
+		case IScratchPad3D::RS_FillMode:
+		{
+			if( pCmd->m_Val == IScratchPad3D::FillMode_Wireframe )
+				g_pDevice->SetRenderState( D3DRS_FILLMODE, D3DFILL_WIREFRAME );
+			else
+				g_pDevice->SetRenderState( D3DRS_FILLMODE, D3DFILL_SOLID );
+		}
+		break;
+
+		case IScratchPad3D::RS_ZRead:
+		{
+			g_pDevice->SetRenderState( D3DRS_ZENABLE, pCmd->m_Val );
+		}
+		break;
+
+		case IScratchPad3D::RS_ZBias:
+		{
+			g_pDevice->SetRenderState( D3DRS_ZBIAS, pCmd->m_Val );
+		}
+		break;
+	}
+}
+
+class CCachedTextData : public CScratchPad3D::ICachedRenderData
+{
+public:
+	CCachedTextData()
+	{
+		m_pTexture = NULL;
+	}
+
+	~CCachedTextData()
+	{
+		if ( m_pTexture )
+			m_pTexture->Release();
+	}
+
+	virtual void Release()
+	{
+		delete this;
+	}
+
+	IDirect3DTexture8 *m_pTexture;
+	int m_BitmapWidth;
+	int m_BitmapHeight;
+	int m_nChars;
+};
+
+
+void GenerateTextGreyscaleBitmap( 
+	const char *pText, 
+	CUtlVector<unsigned char> &bitmap,
+	int *pWidth,
+	int *pHeight )
+{
+	*pWidth = *pHeight = 0;
+
+	
+	// Create a bitmap, font, and HDC.
+	HDC hDC = CreateCompatibleDC( NULL );
+	Assert( hDC );
+
+	HFONT hFont = ::CreateFontA(
+		18,		// font height
+		0, 0, 0, 
+		FW_MEDIUM, 
+		false, 
+		false, 
+		false, 
+		ANSI_CHARSET, 
+		OUT_DEFAULT_PRECIS, 
+		CLIP_DEFAULT_PRECIS, 
+		ANTIALIASED_QUALITY, 
+		DEFAULT_PITCH | FF_DONTCARE, 
+		"Arial" );
+	Assert( hDC );
+	if ( !hFont )
+	{
+		DeleteDC( hDC );
+		return;
+	}
+
+	
+	// Create a bitmap. Allow for width of 512. Hopefully, that can fit all the text we need.
+	int bigImageWidth = 512;
+	int bigImageHeight = 64;
+
+	BITMAPINFOHEADER bmi;
+	memset( &bmi, 0, sizeof( bmi ) );
+
+	bmi.biSize         = sizeof(BITMAPINFOHEADER);
+	bmi.biWidth        = bigImageWidth;
+	bmi.biHeight       = -bigImageHeight;
+	bmi.biBitCount     = 24;
+	bmi.biPlanes       = 1;
+	bmi.biCompression  = BI_RGB;
+	
+	void *pBits = NULL;
+	HBITMAP hBitmap = CreateDIBSection( hDC, 
+		(BITMAPINFO*)&bmi, DIB_RGB_COLORS, (void**)&pBits, NULL, 0 );
+	Assert( hBitmap && pBits );
+
+	if ( !hBitmap )
+	{
+		DeleteObject( hFont );
+		DeleteDC( hDC );
+		return;
+	}
+
+	// Select the font and bitmap into the DC.
+	HFONT hOldFont = (HFONT)SelectObject( hDC, hFont );
+	HBITMAP hOldBitmap = (HBITMAP)SelectObject( hDC, hBitmap );
+
+
+	// Draw the text into the DC.
+	SIZE size;
+	int textLen = strlen( pText );
+	GetTextExtentPoint32( hDC, pText, textLen, &size );
+	TextOut( hDC, 0, 0, pText, textLen );
+
+	// Now copy the bits out.
+	const unsigned char *pSrcBase = (const unsigned char*)pBits;
+	*pWidth = size.cx;
+	*pHeight = size.cy;
+	bitmap.SetSize( size.cy * size.cx );
+	for ( int y=0; y < size.cy; y++ )
+	{
+		for ( int x=0; x < size.cx; x++ )
+		{
+			const unsigned char *pSrc = &pSrcBase[ (y*bigImageWidth+x) * 3 ];
+			unsigned char *pDest = &bitmap[y * size.cx + x];
+
+			int avg = (pSrc[0] + pSrc[1] + pSrc[2]) / 3;
+			*pDest = 0xFF - (unsigned char)avg;
+		}
+	}
+
+
+	// Unselect the objects from the DC and cleanup everything.
+	SelectObject( hDC, hOldFont );
+	DeleteObject( hFont );
+
+	SelectObject( hDC, hOldBitmap );
+	DeleteObject( hBitmap );
+
+	DeleteDC( hDC );
+}
+
+
+IDirect3DTexture8* MakeD3DTextureFromBitmap( 
+	CUtlVector<unsigned char> &bitmap, 
+	int width, 
+	int height,
+	bool bSolidBackground )
+{
+	IDirect3DTexture8 *pRet = NULL;
+	HRESULT hr = g_pDevice->CreateTexture( 
+		width,
+		height,
+		1,
+		0,
+		D3DFMT_A8R8G8B8,
+		D3DPOOL_MANAGED,
+		&pRet );
+
+	if ( !pRet || FAILED( hr ) )
+		return NULL;
+
+	// Lock the texture and fill it up.
+	D3DLOCKED_RECT lockedRect;
+	hr = pRet->LockRect( 0, &lockedRect, NULL, 0 );
+	if ( FAILED( hr ) )
+	{
+		Assert( false );
+		pRet->Release();
+		return NULL;
+	}
+
+	// Now fill it up.
+	unsigned char *pDestData = (unsigned char*)lockedRect.pBits;
+	for ( int y=0; y < height; y++ )
+	{
+		for ( int x=0; x < width; x++ )
+		{
+			unsigned char *pDestPixel = &pDestData[ (y*lockedRect.Pitch + x*4) ];
+			unsigned char cSrcColor = bitmap[y*width+x];
+			
+			if ( bSolidBackground )
+			{
+				pDestPixel[3] = 0xFF;
+				pDestPixel[0] = pDestPixel[1] = pDestPixel[2] = cSrcColor;
+			}
+			else
+			{
+				pDestPixel[0] = pDestPixel[1] = pDestPixel[2] = pDestPixel[3] = 0xFF;
+				pDestPixel[3] = cSrcColor;
+			}
+		}
+	}
+
+	pRet->UnlockRect( 0 );
+	return pRet;
+}
+
+
+void CommandRender_Text( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice )
+{
+	CScratchPad3D::CCommand_Text *pCmd = (CScratchPad3D::CCommand_Text*)pInCmd;
+	CTextParams *pParams = &pCmd->m_TextParams;
+
+	// First, see if we've already generated the texture for this string.
+	CCachedTextData *pCached = (CCachedTextData*)pCmd->m_pCachedRenderData;
+	if ( !pCached )
+	{
+		// Generate a bitmap for this text string.
+		CUtlVector<unsigned char> bitmap;
+		int width, height;
+		GenerateTextGreyscaleBitmap( pCmd->m_String.Base(), bitmap, &width, &height );
+
+		// Convert the bitmap into a D3D texture.
+		pCached = new CCachedTextData;
+		pCached->m_pTexture = MakeD3DTextureFromBitmap( bitmap, width, height, pParams->m_bSolidBackground );
+		pCached->m_BitmapWidth = width;
+		pCached->m_BitmapHeight = height;
+		pCached->m_nChars = strlen( pCmd->m_String.Base() );
+
+		// Cache it.
+		pCmd->m_pCachedRenderData = pCached;
+	}
+
+
+	// Figure out its orientation vectors.
+	Vector vForward, vRight, vUp;
+	AngleVectors( pParams->m_vAngles, &vForward, &vRight, &vUp );
+
+	// Backface removal?
+	bool bFlip = true;
+	if ( vForward.Dot( g_ViewerPos - pParams->m_vPos ) < 0 )
+	{
+		if ( pParams->m_bTwoSided )
+			bFlip = false;
+		else
+			return;
+	}
+
+	// This is really kludgy, but it's the best info we have here.
+	float flTotalWidth = pParams->m_flLetterWidth * pCached->m_nChars;
+
+	float flAvgCharWidth = (float)flTotalWidth / pCached->m_nChars;
+	float flTotalHeight = flAvgCharWidth * 3;
+	
+	Vector vShift( 0, 0, 0 );
+	if ( pParams->m_bCentered )
+		vShift = vRight * ( -flTotalWidth/2 ) + vUp * ( flTotalHeight/2 );
+
+	// Now draw the quad with the texture in it.
+	VertPosDiffuse quad[5]; // Leave space for 1 more for the line strip for the border.
+
+	quad[0].m_Pos = pParams->m_vPos;
+	quad[1].m_Pos = pParams->m_vPos + vRight * flTotalWidth;
+	quad[2].m_Pos = quad[1].m_Pos - vUp * flTotalHeight;
+	quad[3].m_Pos = pParams->m_vPos - vUp * flTotalHeight;
+	
+	// Set tex coords.
+	if ( bFlip )
+	{
+		quad[0].m_tCoords.Init( 1, 0 );
+		quad[1].m_tCoords.Init( 0, 0 );
+		quad[2].m_tCoords.Init( 0, 1 );
+		quad[3].m_tCoords.Init( 1, 1 );
+	}
+	else
+	{
+		quad[0].m_tCoords.Init( 0, 0 );
+		quad[1].m_tCoords.Init( 1, 0 );
+		quad[2].m_tCoords.Init( 1, 1 );
+		quad[3].m_tCoords.Init( 0, 1 );
+	}
+
+	for ( int i=0; i < 4; i++ )
+	{
+		quad[i].m_Pos += vShift;
+		quad[i].SetDiffuse( pParams->m_vColor.x, pParams->m_vColor.y, pParams->m_vColor.z, pParams->m_flAlpha );
+	}
+
+
+	// Draw.
+	
+	// Backup render states.
+	DWORD tss[][3] = {
+		{ D3DTSS_COLOROP, D3DTOP_MODULATE, 0 },
+		{ D3DTSS_COLORARG1, D3DTA_DIFFUSE, 0 },
+		{ D3DTSS_COLORARG2, D3DTA_TEXTURE, 0 },
+		{ D3DTSS_ALPHAOP, D3DTOP_MODULATE, 0 },
+		{ D3DTSS_ALPHAARG1, D3DTA_DIFFUSE, 0 },
+		{ D3DTSS_ALPHAARG2, D3DTA_TEXTURE, 0 } 
+		};
+	#define NUM_TSS ( sizeof( tss ) / sizeof( tss[0] ) )
+
+	DWORD rss[][3] = {
+		{ D3DRS_ALPHABLENDENABLE, TRUE, 0 },
+		{ D3DRS_FILLMODE, D3DFILL_SOLID, 0 },
+		{ D3DRS_SRCBLEND, D3DBLEND_SRCALPHA, 0 },
+		{ D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA, 0 },
+		{ D3DRS_FILLMODE, D3DFILL_SOLID, 0 }
+		};
+	#define NUM_RSS ( sizeof( rss ) / sizeof( rss[0] ) )
+	
+	for ( int i=0; i < NUM_TSS; i++ )
+	{
+		g_pDevice->GetTextureStageState( 0, (D3DTEXTURESTAGESTATETYPE)tss[i][0], &tss[i][2] );
+		g_pDevice->SetTextureStageState( 0, (D3DTEXTURESTAGESTATETYPE)tss[i][0], tss[i][1] );
+	}
+	for ( int i=0; i < NUM_RSS; i++ )
+	{
+		g_pDevice->GetRenderState( (D3DRENDERSTATETYPE)rss[i][0], &rss[i][2] );
+		g_pDevice->SetRenderState( (D3DRENDERSTATETYPE)rss[i][0], rss[i][1] );
+	}
+
+
+	g_pDevice->SetTexture( 0, pCached->m_pTexture );
+	CheckResult( g_pDevice->DrawPrimitiveUP( D3DPT_TRIANGLEFAN, 2, quad, sizeof(quad[0]) ) );
+	g_pDevice->SetTexture( 0, NULL );
+
+	++g_nPolygons;
+
+
+	// Restore render states.
+	for ( int i=0; i < NUM_TSS; i++ )
+		g_pDevice->SetTextureStageState( 0, (D3DTEXTURESTAGESTATETYPE)tss[i][0], tss[i][2] );
+
+	for ( int i=0; i < NUM_RSS; i++ )
+		g_pDevice->SetRenderState( (D3DRENDERSTATETYPE)rss[i][0], rss[i][2] );
+
+
+	// Draw wireframe outline..
+	if ( pParams->m_bOutline )
+	{
+		DWORD fillMode;
+		g_pDevice->GetRenderState( D3DRS_FILLMODE, &fillMode );
+		g_pDevice->SetRenderState( D3DRS_FILLMODE, D3DFILL_WIREFRAME );
+		
+		quad[4] = quad[0];
+		g_pDevice->DrawPrimitiveUP( D3DPT_LINESTRIP, 4, quad, sizeof(quad[0]) );
+		
+		g_pDevice->SetRenderState( D3DRS_FILLMODE, fillMode );
+	}
+}
+
+
+typedef void (*CommandRenderFunction_Start)( IDirect3DDevice8 *pDevice );
+typedef void (*CommandRenderFunction_Stop)( IDirect3DDevice8 *pDevice );
+typedef void (*CommandRenderFunction)( CScratchPad3D::CBaseCommand *pInCmd, IDirect3DDevice8 *pDevice );
+
+class CCommandRenderFunctions
+{
+public:
+	CommandRenderFunction_Start m_StartFn;
+	CommandRenderFunction_Start m_StopFn;
+	CommandRenderFunction m_RenderFn;
+};
+
+CCommandRenderFunctions g_CommandRenderFunctions[CScratchPad3D::COMMAND_NUMCOMMANDS] =
+{
+	{ NULL, NULL, CommandRender_Point },
+	{ CommandRender_LinesStart, CommandRender_LinesStop, CommandRender_Line },
+	{ NULL, NULL, CommandRender_Polygon },
+	{ NULL, NULL, CommandRender_Matrix },
+	{ NULL, NULL, CommandRender_RenderState },
+	{ NULL, NULL, CommandRender_Text }
+};
+
+
+void RunCommands( )
+{
+	// Set all the initial states.
+	g_pDevice->SetRenderState( D3DRS_FILLMODE, D3DFILL_SOLID );
+	g_pDevice->SetRenderState( D3DRS_ZENABLE, D3DZB_TRUE );
+
+	VMatrix mIdentity = SetupMatrixIdentity();
+	g_pDevice->SetTransform( D3DTS_WORLD, (D3DMATRIX*)&mIdentity );
+
+	int iLastCmd = -1;
+	for( int i=0; i < g_pScratchPad->m_Commands.Size(); i++ )
+	{
+		CScratchPad3D::CBaseCommand *pCmd = g_pScratchPad->m_Commands[i];
+
+		if( pCmd->m_iCommand >= 0 && pCmd->m_iCommand < CScratchPad3D::COMMAND_NUMCOMMANDS )
+		{
+			// Call the start/stop handlers for this command type if they exist.
+			// These can be used to batch primitives.
+			if ( pCmd->m_iCommand != iLastCmd )
+			{
+				if ( iLastCmd != -1 )
+				{
+					if ( g_CommandRenderFunctions[iLastCmd].m_StopFn )
+						g_CommandRenderFunctions[iLastCmd].m_StopFn( g_pDevice );
+				}
+
+				iLastCmd = pCmd->m_iCommand;
+
+				if ( g_CommandRenderFunctions[pCmd->m_iCommand].m_StartFn )
+					g_CommandRenderFunctions[pCmd->m_iCommand].m_StartFn( g_pDevice );
+			}
+
+			g_CommandRenderFunctions[pCmd->m_iCommand].m_RenderFn( pCmd, g_pDevice );
+		}
+	}
+
+	// Call the final stop function.
+	if ( iLastCmd != -1 )
+	{
+		if ( g_CommandRenderFunctions[iLastCmd].m_StopFn )
+			g_CommandRenderFunctions[iLastCmd].m_StopFn( g_pDevice );
+	}
+}
+
+
+bool CheckForNewFile( bool bForce )
+{
+	// See if the file has changed..
+	HANDLE hFile = CreateFile( 
+		g_pScratchPad->m_pFilename, 
+		GENERIC_READ, 
+		FILE_SHARE_READ,
+		NULL,
+		OPEN_EXISTING,
+		0,
+		NULL );
+
+	if( !hFile )
+		return false;
+
+	FILETIME createTime, accessTime, writeTime;
+	if( !GetFileTime( hFile, &createTime, &accessTime, &writeTime ) )
+	{
+		CloseHandle( hFile );
+		return false;
+	}
+
+	bool bChange = false;
+	if( memcmp(&writeTime, &g_LastWriteTime, sizeof(writeTime)) != 0 || bForce )
+	{
+		bChange = g_pScratchPad->LoadCommandsFromFile();
+		if( bChange )
+		{
+			memcpy( &g_LastWriteTime, &writeTime, sizeof(writeTime) );
+		}
+	}
+
+	CloseHandle( hFile );
+	return bChange;
+}
+
+
+// ------------------------------------------------------------------------------------------ //
+// App callbacks.
+// ------------------------------------------------------------------------------------------ //
+
+void UpdateWindowText()
+{
+	char str[512];
+	sprintf( str, "ScratchPad3DViewer: <%s>  lines: %d, polygons: %d", g_Filename, g_nLines, g_nPolygons );
+	Sys_SetWindowText( str );
+}
+
+
+void AppInit()
+{
+	// Viewer info.
+	g_ViewController.m_vPos.Init( -200, 0, 0 );
+	g_ViewController.m_vAngles.Init( 0, 0, 0 );
+
+	char const *pFilename = Sys_FindArg( "-file", "scratch.pad" );
+	Q_strncpy( g_Filename, pFilename, sizeof( g_Filename ) );
+
+	IFileSystem *pFileSystem = ScratchPad3D_SetupFileSystem();
+	if( !pFileSystem || pFileSystem->Init() != INIT_OK )
+	{
+		Sys_Quit();
+	}
+
+	// FIXME: I took this out of scratchpad 3d, not sure if this is even necessary any more
+	pFileSystem->AddSearchPath( ".", "PLATFORM" );	
+
+	g_pScratchPad = new CScratchPad3D( pFilename, pFileSystem, false );
+
+	g_nLines = g_nPolygons = 0;
+	UpdateWindowText();
+
+	g_pDevice->SetRenderState( D3DRS_EDGEANTIALIAS, FALSE );
+	g_pDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
+	g_pDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
+	g_pDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE );
+	g_pDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, FALSE );
+	g_pDevice->SetTexture( 0, NULL ); 
+
+	// Setup point scaling parameters.
+	float flOne=1;
+	float flZero=0;
+	g_pDevice->SetRenderState( D3DRS_POINTSCALEENABLE, TRUE );
+	g_pDevice->SetRenderState( D3DRS_POINTSCALE_A, *((DWORD*)&flZero) );
+	g_pDevice->SetRenderState( D3DRS_POINTSCALE_B, *((DWORD*)&flZero) );
+	g_pDevice->SetRenderState( D3DRS_POINTSCALE_C, *((DWORD*)&flOne) );
+
+	memset( &g_LastWriteTime, 0, sizeof(g_LastWriteTime) );
+}
+
+
+void AppRender( float frametime, float mouseDeltaX, float mouseDeltaY, bool bInvalidRect )
+{
+	g_nLines = 0;
+	g_nPolygons = 0;
+
+	g_pDevice->SetVertexShader( VertPosDiffuse::GetFVF() );
+	
+	if( !bInvalidRect && 
+		!Sys_GetKeyState( APPKEY_LBUTTON ) && 
+		!Sys_GetKeyState( APPKEY_RBUTTON ) && 
+		!CheckForNewFile(false) )
+	{
+		Sys_Sleep( 100 );
+		return;
+	}
+
+	g_pDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0, 1, 0 );
+
+	g_pDevice->BeginScene();
+
+	UpdateView( mouseDeltaX, mouseDeltaY );
+	
+	RunCommands();
+
+	g_pDevice->EndScene();
+
+	g_pDevice->Present( NULL, NULL, NULL, NULL );
+
+	UpdateWindowText();
+}
+
+
+void AppPreResize()
+{
+	for( int i=0; i < g_pScratchPad->m_Commands.Size(); i++ )
+	{
+		CScratchPad3D::CBaseCommand *pCmd = g_pScratchPad->m_Commands[i];
+
+		if ( pCmd->m_iCommand == CScratchPad3D::COMMAND_TEXT )
+		{
+			// Delete the cached data if there is any.
+			pCmd->ReleaseCachedRenderData();
+		}
+	}	
+}
+
+void AppPostResize()
+{
+}
+
+
+void AppExit( )
+{
+}
+
+
+void AppKey( int key, int down )
+{
+	if( key == 27 )
+	{
+		Sys_Quit();
+	}
+	else if( toupper(key) == 'U' )
+	{
+		CheckForNewFile( true );
+		AppRender( 0.1f, 0, 0, true );
+	}
+}
+
+
+void AppChar( int key )
+{
+}
+
+
+
+