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/*============================================================================
|    _________ _______  _______  ______  _______    Jegas, LLC               |
|   /___  ___// _____/ / _____/ / __  / / _____/    JasonPSage@jegas.com     |
|      / /   / /__    / / ___  / /_/ / / /____                               |
|     / /   / ____/  / / /  / / __  / /____  /                               |
|____/ /   / /___   / /__/ / / / / / _____/ /                                |
/_____/   /______/ /______/ /_/ /_/ /______/                                 |
|                 Under the Hood                                             |
==============================================================================
           Copyright(c)2008 Jegas, LLC                      
============================================================================*/
#pragma once
#include "jgc_configuration.h"
//----------------------------------------------------------------------------
// DarkGDK Missing Declarations
//----------------------------------------------------------------------------
int __cdecl dbCameraExist(int);
int __cdecl dbGet3DMathsExist(int);
int __cdecl dbSetBlendMappingOn(int,int,int,int);
int __cdecl dbDLLCallExist(int,unsigned long);
void __cdecl dbLoadDLL(unsigned long,int);
float dbObjectSizeX ( int iID, int iUseScaling );
float dbObjectSizeY ( int iID, int iUseScaling );
float dbObjectSizeZ ( int iID, int iUseScaling ); 

//I think in this case, you might change the include file DarkSDKCore.h, line 82:
//LONGLONG dbPerformanceTimer ( void );
//I'd comment that out and put this in there:
LONGLONG PerformanceTimer ( void );


// DWORD dbGetInternalData(void *i); // ???? TODO: see if Dmitry K has posted 
//   the correct declaraion for this in the TGC forums :(
//----------------------------------------------------------------------------



//----------------------------------------------------------------------------

//----------------------------------------------------------------------------
float GetMatrix4Element( int Matrix, int Element ){
//----------------------------------------------------------------------------
  float res = 0.0;
  D3DXMATRIX mat = dbGetMatrix(Matrix);
  if (Element>=0 && Element<=15) res = mat[Element];
  return res;
};
//----------------------------------------------------------------------------

//TODO: See if DMitry has posted the dbGetInternalData declaration
// in the TGC forums so I can make this part of the lib :(
// NOTE: He Did - it was a DarkSDKCamera.h thing that is gone now :(
/*
//----------------------------------------------------------------------------
// By: Dmitry K on TGC forums.
void SetMatrixElement( int Matrix, int Element, float Value ){  
//----------------------------------------------------------------------------
    D3DXMATRIX mat, TMat;
    mat = dbGetMatrix(Matrix);
    DWORD IDP = dbGetInternalData( 0 );
    D3DXMATRIX* PMat = (D3DXMATRIX*)(IDP);
    TMat = *PMat;    
    if (Element>=0 && Element<=15) mat[Element]=Value;
    *PMat = mat;    
    dbGetProjectionMatrix( Matrix );    
    *PMat = TMat;
};
//----------------------------------------------------------------------------
*/

void dbSetShadowShadingOn(int obj, int mesh, int range, int shader);

// Dark GDK - The Game Creators - www.thegamecreators.com

// the wizard has created a very simple project that uses Dark GDK
// it contains the basic code for a GDK application

// whenever using Dark GDK you must ensure you include the header file
#include "DarkGDK.h"

// the main entry point for the application is this function
void DarkGDK ( void )
{
	// turn on sync rate and set maximum rate to 60 fps
	dbSyncOn   ( );
	dbSyncRate ( 60 );

	dbAutoCamOff();

	int iBox = 1;
	int iFloor = 2;
	
	dbMakeObjectPlain( iFloor, 100, 100 );
	dbRotateObject( iFloor, 270, 0, 0 );

	// make primitive object box
	dbMakeObjectBox( iBox, 10, 10, 10 );

	// make mesh from file
	//dbLoadObject( "char.x", iBox, 1 );
	//dbRotateObject( iBox, 270, 0, 0 );

	dbPositionObject( iBox, 0, 20, 0 );

	dbPositionCamera( 0, 100, 100 );
	dbPointCamera( 0, 20, 0 );

	dbHideLight( 0 );

	dbMakeLight( 1 );

	dbSetPointLight( 1, 50, 100, 50 );
	dbSetLightRange( 1, 500 );

	dbSetShadowShadingOn( iBox, -1, 255, 1 );
	dbPositionLight( 0, 50, 100, 50 );

	// our main loop
	while ( LoopGDK ( ) )
	{
		dbText(0, 0, dbStr( dbScreenFPS() ) );
		dbYRotateObject( iBox, dbObjectAngleY( iBox ) + 0.5 );

		// update the screen
		dbSync ( );
	}

	// return back to windows
	return;
}

/*********** DBPRO UNTWEAKABLES **********/
float4x4 boneMatrix[60] : BoneMatrixPalette;

// Shader Code
void VertShadowVolume( float4 vPos : POSITION,
                       float3 vNormal : NORMAL,
                       out float4 oPos : POSITION )
{
    float4 PosView = mul( vPos, g_mWorld );
    float3 LightVec = PosView.xyz - g_vLightView;
    float3 N = mul( vNormal, (float3x3)g_mWorld );

    // Extrude quad vertex if normal faces away from light
    LightVec = normalize ( LightVec );
    if( dot( N, -LightVec  ) < 0.0f )
    {
      // stretch out
      PosView.x += LightVec.x * g_mShadowRange;
      PosView.y += LightVec.y * g_mShadowRange;
      PosView.z += LightVec.z * g_mShadowRange;
    }
    else
    {
      // defeat self-shadow zclash
      PosView.x += LightVec.x*0.1f;
      PosView.y += LightVec.y*0.1f;
      PosView.z += LightVec.z*0.1f;
    }
    oPos = mul( PosView, g_mViewProjection );
}

technique RenderShadowVolume
{
    pass P0
    {
        VertexShader = compile vs_1_1 VertShadowVolume();
        StencilPass = Keep;
        StencilZFail = Incr;
        CullMode     = CCW;
    }
    pass P1
    {
        VertexShader = compile vs_1_1 VertShadowVolume();
        CullMode = Cw;
        StencilZFail = Decr;
    }
}