void AverageLuminance(LPDIRECT3DTEXTURE9 pSource)
{
LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
D3DXHANDLE shader = g_pExposureEffect->GetTechniqueByName("Average16Samples");
g_pExposureEffect->SetTechnique(shader);
D3DXHANDLE texoffset_var = g_pExposureEffect->GetParameterByName(NULL, "vTexOffset");
D3DXHANDLE image_var = g_pExposureEffect->GetParameterByName(NULL, "Image");
float fTexX, fTexY;
Vector4 vTexOffset_256x256[16];
Vector4 vTexOffset_64x64[16];
Vector4 vTexOffset_16x16[16];
Vector4 vTexOffset_4x4[16];
int index = 0;
index=0;
fTexX = 1.0f/256.0f;
fTexY = 1.0f/256.0f;
for ( int y=0; y<4; y++ )
{
for ( int x=0; x<4; x++ )
{
vTexOffset_256x256[index].Set(x*fTexX, y*fTexY, 0.0f, 0.0f);
index++;
}
}
index=0;
fTexX = 1.0f/64.0f;
fTexY = 1.0f/64.0f;
for ( int y=0; y<4; y++ )
{
for ( int x=0; x<4; x++ )
{
vTexOffset_64x64[index].Set(x*fTexX, y*fTexY, 0.0f, 0.0f);
index++;
}
}
index=0;
fTexX = 1.0f/16.0f;
fTexY = 1.0f/16.0f;
for ( int y=0; y<4; y++ )
{
for ( int x=0; x<4; x++ )
{
vTexOffset_16x16[index].Set(x*fTexX, y*fTexY, 0.0f, 0.0f);
index++;
}
}
index=0;
fTexX = 1.0f/4.0f;
fTexY = 1.0f/4.0f;
for ( int y=0; y<4; y++ )
{
for ( int x=0; x<4; x++ )
{
vTexOffset_4x4[index].Set(x*fTexX, y*fTexY, 0.0f, 0.0f);
index++;
}
}
// 256x256 -> 64x164
{
device->SetRenderTarget(0, g_pFrameSurface[DOWNSAMPLED_64x64]);
device->SetDepthStencilSurface(NULL);
g_pExposureEffect->SetVectorArray(texoffset_var, (D3DXVECTOR4*)vTexOffset_256x256, 16);
g_pExposureEffect->SetTexture(image_var, pSource);
g_pExposureEffect->Begin(NULL, 0);
g_pExposureEffect->BeginPass(0);
DrawFullScreenQuad(&g_Image64x64);
g_pExposureEffect->EndPass();
g_pExposureEffect->End();
}
// 64x64 -> 16x16
{
device->SetRenderTarget(0, g_pFrameSurface[DOWNSAMPLED_16x16]);
device->SetDepthStencilSurface(NULL);
g_pExposureEffect->SetVectorArray(texoffset_var, (D3DXVECTOR4*)vTexOffset_64x64, 16);
g_pExposureEffect->SetTexture(image_var, pSource);
g_pExposureEffect->Begin(NULL, 0);
g_pExposureEffect->BeginPass(0);
DrawFullScreenQuad(&g_Image64x64);
g_pExposureEffect->EndPass();
g_pExposureEffect->End();
}
// 16x16 -> 4x4
{
device->SetRenderTarget(0, g_pFrameSurface[DOWNSAMPLED_4x4]);
g_pExposureEffect->SetVectorArray(texoffset_var, (D3DXVECTOR4*)vTexOffset_16x16, 16);
g_pExposureEffect->SetTexture(image_var, g_pFrameBuffer[DOWNSAMPLED_16x16]);
g_pExposureEffect->Begin(NULL, 0);
g_pExposureEffect->BeginPass(0);
DrawFullScreenQuad(&g_Image16x16);
g_pExposureEffect->EndPass();
g_pExposureEffect->End();
}
// 4x4 -> 1x1
{
device->SetRenderTarget(0, g_pFrameSurface[LUMINANCE_CURRENT]);
g_pExposureEffect->SetVectorArray(texoffset_var, (D3DXVECTOR4*)vTexOffset_4x4, 16);
g_pExposureEffect->SetTexture(image_var, g_pFrameBuffer[DOWNSAMPLED_4x4]);
g_pExposureEffect->Begin(NULL, 0);
g_pExposureEffect->BeginPass(0);
DrawFullScreenQuad(&g_Image4x4);
g_pExposureEffect->EndPass();
g_pExposureEffect->End();
}
}
static void ParticleSimulation(void)
{
LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
device->SetRenderTarget(0, g_pSurfaces[TEX_POSITION1]);
device->SetRenderTarget(1, g_pSurfaces[TEX_VELOCITY1]);
device->SetDepthStencilSurface(NULL);
RECT rect;
rect.left = 0;
rect.right = g_texture_width;
rect.top = 0;
rect.bottom = g_num_particles / g_texture_width;
if ( rect.bottom==0 )
return;
device->SetScissorRect(&rect);
device->SetRenderState(D3DRS_SCISSORTESTENABLE, TRUE);
D3DXHANDLE shader = g_pParticleFX->GetTechniqueByName("Simulate");
D3DXHANDLE positiontex_var = g_pParticleFX->GetParameterByName(NULL, "PositionTex");
D3DXHANDLE velocitytex_var = g_pParticleFX->GetParameterByName(NULL, "VelocityTex");
D3DXHANDLE noisetex_var = g_pParticleFX->GetParameterByName(NULL, "NoiseTex");
D3DXHANDLE force_var = g_pParticleFX->GetParameterByName(NULL, "Force");
D3DXHANDLE time_var = g_pParticleFX->GetParameterByName(NULL, "fTimeAdvance");
D3DXHANDLE rand_var = g_pParticleFX->GetParameterByName(NULL, "Rand");
D3DXHANDLE tan_var = g_pParticleFX->GetParameterByName(NULL, "fTan");
D3DXHANDLE liferange_var = g_pParticleFX->GetParameterByName(NULL, "LifeRange");
D3DXHANDLE speedrange_var = g_pParticleFX->GetParameterByName(NULL, "SpeedRange");
D3DXHANDLE sizerange_var = g_pParticleFX->GetParameterByName(NULL, "SizeRange");
Vector4 vForce = g_vForce * g_fTimeAdvance;
Vector4 vRand[3];
Vector4 vLifeRange(1.0f, 2.0f, 0.0f, 0.0f);
Vector4 vSpeedRange(1.0f, 2.0f, 0.0f, 0.0f);
Vector4 vSizeRange(0.01f, 0.02f, 0.0f, 0.0f);
for ( int i=0; i<3; i++ )
{
vRand[i][0] = float(rand()%1024)/1024.0f;
vRand[i][1] = float(rand()%1024)/1024.0f;
vRand[i][2] = float(rand()%1024)/1024.0f;
vRand[i][3] = float(rand()%1024)/1024.0f;
}
g_pParticleFX->SetTechnique(shader);
g_pParticleFX->SetTexture(positiontex_var, g_pTextures[TEX_POSITION0]);
g_pParticleFX->SetTexture(velocitytex_var, g_pTextures[TEX_VELOCITY0]);
g_pParticleFX->SetTexture(noisetex_var, g_pNoiseTexture);
g_pParticleFX->SetVector(force_var, (D3DXVECTOR4*)&vForce);
g_pParticleFX->SetVectorArray(rand_var, (D3DXVECTOR4*)&vRand, 3);
g_pParticleFX->SetVector(liferange_var, (D3DXVECTOR4*)&vLifeRange);
g_pParticleFX->SetVector(speedrange_var, (D3DXVECTOR4*)&vSpeedRange);
g_pParticleFX->SetVector(sizerange_var, (D3DXVECTOR4*)&vSizeRange);
g_pParticleFX->SetFloat(time_var, g_fTimeAdvance);
g_pParticleFX->SetFloat(tan_var, FastMath::Tan(FastMath::DegToRad(g_fEmitTheta)));
g_pParticleFX->Begin(NULL,0);
g_pParticleFX->BeginPass(0);
GutDrawFullScreenQuad_DX9(&g_ImageInfo);
g_pParticleFX->EndPass();
g_pParticleFX->End();
device->SetRenderTarget(1, NULL);
device->SetRenderState(D3DRS_SCISSORTESTENABLE, FALSE);
}
