本文整理汇总了C++中FloatImage::allocate方法的典型用法代码示例。如果您正苦于以下问题：C++ FloatImage::allocate方法的具体用法？C++ FloatImage::allocate怎么用？C++ FloatImage::allocate使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类FloatImage的用法示例。
在下文中一共展示了FloatImage::allocate方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: distribution
FloatImage * nv::createNormalMipmapMap(const FloatImage * img)
{
nvDebugCheck(img != NULL);
uint w = img->width();
uint h = img->height();
uint hw = w / 2;
uint hh = h / 2;
FloatImage dotImg;
dotImg.allocate(1, w, h);
FloatImage shImg;
shImg.allocate(9, hw, hh);
SampleDistribution distribution(256);
const uint sampleCount = distribution.sampleCount();
for (uint d = 0; d < sampleCount; d++)
{
const float * xChannel = img->channel(0);
const float * yChannel = img->channel(1);
const float * zChannel = img->channel(2);
Vector3 dir = distribution.sampleDir(d);
Sh2 basis;
basis.eval(dir);
for(uint i = 0; i < w*h; i++)
{
Vector3 normal(xChannel[i], yChannel[i], zChannel[i]);
normal = normalizeSafe(normal, Vector3(zero), 0.0f);
dotImg.setPixel(dot(dir, normal), d);
}
// @@ It would be nice to have a fastDownSample that took an existing image as an argument, to avoid allocations.
AutoPtr<FloatImage> dotMip(dotImg.fastDownSample());
for(uint p = 0; p < hw*hh; p++)
{
float f = dotMip->pixel(p);
// Project irradiance to sh basis and accumulate.
for (uint i = 0; i < 9; i++)
{
float & sum = shImg.channel(i)[p];
sum += f * basis.elemAt(i);
}
}
}
FloatImage * normalMipmap = new FloatImage;
normalMipmap->allocate(4, hw, hh);
// Precompute the clamped cosine radiance transfer.
Sh2 prt;
prt.cosineTransfer();
// Allocate outside the loop.
Sh2 sh;
for(uint p = 0; p < hw*hh; p++)
{
for (uint i = 0; i < 9; i++)
{
sh.elemAt(i) = shImg.channel(i)[p];
}
// Convolve sh irradiance by radiance transfer.
sh *= prt;
// Now sh(0) is the ambient occlusion.
// and sh(1) is the normal direction.
// Should we use SVD to fit only the normals to the SH?
}
return normalMipmap;
}