www.pudn.com > packmk2.rar > tools.cpp

#include "tools.h" 
 
float gaussian(float x, float d) 
{ 
	return exp(-x*x/(2*d*d))/sqrt(2*PI*d); 
} 
 
struct DVERTEX 
{ 
	D3DXVECTOR3	position; 
	float u,v; 
}; 
 
#define D3DFVF_DVERTEX (D3DFVF_XYZ|D3DFVF_TEX1) 
 
 
// render a small texture overlay 
void debug_render_quad(const LPDIRECT3DDEVICE9 device, const LPDIRECT3DTEXTURE9 texture, int n) 
{ 
	LPDIRECT3DVERTEXBUFFER9		quad; 
 
	// Create the quad vertex buffer 
	 
	device->CreateVertexBuffer( 6*sizeof(DVERTEX), 
		0, D3DFVF_DVERTEX, 
		D3DPOOL_DEFAULT, &quad, NULL ); 
	 
	DVERTEX *qV; 
 
	int ix = n%4, 
		iy = n/4; 
 
	float	fx = (ix / 4.0f)*2.0f - 1.0f, 
			fy = (iy / 4.0f)*2.0f - 1.0f, 
			d = 2.0f / 4.0f; 
 
 
	if( !FAILED( quad->Lock( 0, 0, (void**)&qV, 0 ) ) ){ 
	 
		qV[0].position = D3DXVECTOR3(fx,	fy,		0); 
		qV[1].position = D3DXVECTOR3(fx+d,	fy,		0); 
		qV[2].position = D3DXVECTOR3(fx,	fy+d,	0); 
		qV[3].position = D3DXVECTOR3(fx,	fy+d,	0); 
		qV[4].position = D3DXVECTOR3(fx+d,	fy,		0); 
		qV[5].position = D3DXVECTOR3(fx+d,	fy+d,	0);		 
 
		qV[0].u = 0;	qV[0].v = 0; 
		qV[1].u = +1;	qV[1].v = 0; 
		qV[2].u = 0;	qV[2].v = +1; 
		qV[3].u = 0;	qV[3].v = +1; 
		qV[4].u = +1;	qV[4].v = 0; 
		qV[5].u = +1;	qV[5].v = +1; 
 
		quad->Unlock(); 
	} 
	 
	device->SetRenderState(D3DRS_ZENABLE, D3DZB_FALSE); 
	device->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);	 
	device->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE); 
	device->SetRenderState(D3DRS_ZWRITEENABLE, FALSE); 
 
	device->SetFVF(D3DFVF_DVERTEX); 
	device->SetStreamSource( 0, quad, 1, sizeof(DVERTEX) ); 
	device->SetTexture( 0, texture); 
 
	D3DXMATRIXA16 id; 
	D3DXMatrixIdentity( &id ); 
	device->SetTransform( D3DTS_VIEW, &id ); 
	device->SetTransform( D3DTS_PROJECTION, &id ); 
	 
	device->DrawPrimitive( D3DPT_TRIANGLELIST, 0, 2); 
 
	quad->Release(); 
	device->SetTexture( 0, NULL); 
	device->SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE); 
	//device->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);	 
	//device->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE); 
	device->SetRenderState(D3DRS_ZWRITEENABLE, TRUE); 
 
}