/*
Name SimplexNoise::createRandomTexture
Syntax SimplexNoise::createRandomTexture(ID3D10ShaderResourceView* _texRV)
Param ID3D10ShaderResourceView* _texRV - The texture resource view
Brief Builds a random 1D texture used for generating
random values in effect files
*/
ID3D10ShaderResourceView* SimplexNoise::createRandomTexture()
{
// Create random data
D3DXVECTOR4 randomValues[1024];
for (int i = 0; i < 1024; ++i)
{
randomValues[i].x = randFloat(-1.0f, 1.0f);
randomValues[i].y = randFloat(-1.0f, 1.0f);
randomValues[i].z = randFloat(-1.0f, 1.0f);
randomValues[i].w = randFloat(-1.0f, 1.0f);
}
D3D10_SUBRESOURCE_DATA initData;
initData.pSysMem = randomValues;
initData.SysMemPitch = 1024 * sizeof(D3DXVECTOR4);
initData.SysMemSlicePitch = 1024 * sizeof(D3DXVECTOR4);
// Create the texture
D3D10_TEXTURE1D_DESC texDesc;
texDesc.Width = 1024;
texDesc.MipLevels = 1;
texDesc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
texDesc.Usage = D3D10_USAGE_IMMUTABLE;
texDesc.BindFlags = D3D10_BIND_SHADER_RESOURCE;
texDesc.CPUAccessFlags = 0;
texDesc.MiscFlags = 0;
texDesc.ArraySize = 1;
ID3D10Texture1D* randomTex = 0;
ID3D10Device* d3dDevice = Scene::instance()->getDevice();
HRESULT hr = d3dDevice->CreateTexture1D(&texDesc, &initData, &randomTex);
if (FAILED(hr))
{
MessageBox(0, "Create random texture - Failed", "Error", MB_OK);
return 0;
}
// Create the resource view
D3D10_SHADER_RESOURCE_VIEW_DESC viewDesc;
viewDesc.Format = texDesc.Format;
viewDesc.ViewDimension = D3D10_SRV_DIMENSION_TEXTURE1D;
viewDesc.Texture1D.MipLevels = texDesc.MipLevels;
viewDesc.Texture1D.MostDetailedMip = 0;
ID3D10ShaderResourceView* texRV;
hr = d3dDevice->CreateShaderResourceView(randomTex, &viewDesc, &texRV);
if (FAILED(hr))
{
MessageBox(0, "Create random tex RV - Failed", "Error", MB_OK);
return 0;
}
randomTex->Release();
randomTex = 0;
return texRV;
}
void ParticleEngine::CreateRandomTex()
{
HRESULT hr;
D3DXVECTOR4 randomValues[1024];
for(int i = 0; i < 1024; i++)
{
randomValues[i].x = RandF(-1.0f, 1.f);
randomValues[i].y = RandF(-1.0f, 1.f);
randomValues[i].z = RandF(-1.0f, 1.f);
randomValues[i].w = RandF(-1.0f, 1.f);
}
D3D10_SUBRESOURCE_DATA initData;
initData.pSysMem = randomValues;
initData.SysMemPitch = sizeof(D3DXVECTOR4)*1024;
initData.SysMemSlicePitch = sizeof(D3DXVECTOR4)*1024;
D3D10_TEXTURE1D_DESC texDesc;
texDesc.Width = 1024;
texDesc.MipLevels = 1;
texDesc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
texDesc.Usage = D3D10_USAGE_IMMUTABLE;
texDesc.BindFlags = D3D10_BIND_SHADER_RESOURCE;
texDesc.CPUAccessFlags = 0;
texDesc.MiscFlags = 0;
texDesc.ArraySize = 1;
ID3D10Texture1D* randTex = 0;
hr = device->CreateTexture1D(&texDesc, &initData, &randTex);
if(FAILED(hr))
MessageBox(NULL, "( ParticleEngine ) Failed to create Random Texture", NULL, NULL);
D3D10_SHADER_RESOURCE_VIEW_DESC rViewDesc;
rViewDesc.Format = texDesc.Format;
rViewDesc.ViewDimension = D3D10_SRV_DIMENSION_TEXTURE1D;
rViewDesc.Texture1D.MipLevels = texDesc.MipLevels;
rViewDesc.Texture1D.MostDetailedMip = 0;
hr = device->CreateShaderResourceView(randTex, &rViewDesc, &randomTex);
if(FAILED(hr))
MessageBox(NULL, "( ParticleEngine ) Failed to create Random Texture ResourceView", NULL, NULL);
randTex->Release();
}
/*
Name SimplexNoise::createSimplexTexture
Syntax SimplexNoise::createSimplexTexture()
Return ID3D10ShaderResourceView* - A pointer to a simplex lookup resource
Brief Creates a 1D texture simplex lookup resource used for finding the
current simplex
*/
ID3D10ShaderResourceView* SimplexNoise::createSimplexTexture()
{
// Simplex look up table for determining which simplex a point is in
unsigned char simplex4[][4] = {{0,64,128,192},{0,64,192,128},{0,0,0,0},{0,128,192,64},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{64,128,192,0},
{0,128,64,192},{0,0,0,0},{0,192,64,128},{0,192,128,64},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{64,192,128,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{64,128,0,192},{0,0,0,0},{64,192,0,128},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{128,192,0,64},{128,192,64,0},
{64,0,128,192},{64,0,192,128},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{128,0,192,64},{0,0,0,0},{128,64,192,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{128,0,64,192},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{192,0,64,128},{192,0,128,64},{0,0,0,0},{192,64,128,0},
{128,64,0,192},{0,0,0,0},{0,0,0,0},{0,0,0,0},
{192,64,0,128},{0,0,0,0},{192,128,0,64},{192,128,64,0}};
D3D10_SUBRESOURCE_DATA initData;
initData.pSysMem = simplex4;
initData.SysMemPitch = 64 * 4 * sizeof(char);
initData.SysMemSlicePitch = 64 * 4 * sizeof(char);
// Create the texture
D3D10_TEXTURE1D_DESC texDesc;
texDesc.Width = 64;
texDesc.MipLevels = 1;
texDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
texDesc.Usage = D3D10_USAGE_IMMUTABLE;
texDesc.BindFlags = D3D10_BIND_SHADER_RESOURCE;
texDesc.CPUAccessFlags = 0;
texDesc.MiscFlags = 0;
texDesc.ArraySize = 1;
ID3D10Texture1D* simplexTex = 0;
ID3D10Device* d3dDevice = Scene::instance()->getDevice();
HRESULT hr = d3dDevice->CreateTexture1D(&texDesc, &initData, &simplexTex);
if (FAILED(hr))
{
MessageBox(0, "Create simplex texture - Failed", "Error", MB_OK);
return 0;
}
// Create the resource view
D3D10_SHADER_RESOURCE_VIEW_DESC viewDesc;
viewDesc.Format = texDesc.Format;
viewDesc.ViewDimension = D3D10_SRV_DIMENSION_TEXTURE1D;
viewDesc.Texture1D.MipLevels = texDesc.MipLevels;
viewDesc.Texture1D.MostDetailedMip = 0;
ID3D10ShaderResourceView* texRV;
hr = d3dDevice->CreateShaderResourceView(simplexTex, &viewDesc, &texRV);
if (FAILED(hr))
{
MessageBox(0, "Create random tex RV - Failed", "Error", MB_OK);
return 0;
}
simplexTex->Release();
simplexTex = 0;
return texRV;
}
