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po2 scaling for average luminance

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glassmancody.info 2023-02-05 12:30:38 -08:00
parent 72efd3a650
commit e778ffee9b
6 changed files with 40 additions and 28 deletions
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22
components/terrain/quadtreeworld.cpp
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@ -9,6 +9,7 @@
#include <components/loadinglistener/reporter.hpp>
#include <components/misc/constants.hpp>
#include <components/misc/mathutil.hpp>
#include <components/resource/resourcesystem.hpp>
#include <components/sceneutil/positionattitudetransform.hpp>
@ -22,25 +23,6 @@
namespace
{
bool isPowerOfTwo(int x)
{
return ((x > 0) && ((x & (x - 1)) == 0));
}
int nextPowerOfTwo(int v)
{
if (isPowerOfTwo(v))
return v;
int depth = 0;
while (v)
{
v >>= 1;
depth++;
}
return 1 << depth;
}
unsigned int Log2(unsigned int n)
{
unsigned int targetlevel = 0;
@ -153,7 +135,7 @@ namespace Terrain
int origSizeY = static_cast<int>(mMaxY - mMinY);
// Dividing a quad tree only works well for powers of two, so round up to the nearest one
int size = nextPowerOfTwo(std::max(origSizeX, origSizeY));
int size = Misc::nextPowerOfTwo(std::max(origSizeX, origSizeY));
float centerX = (mMinX + mMaxX) / 2.f + (size - origSizeX) / 2.f;
float centerY = (mMinY + mMaxY) / 2.f + (size - origSizeY) / 2.f;