float NzWorley2D::Get()
{
xc = x * m_scale;
yc = y * m_scale;
x0 = fastfloor(xc);
y0 = fastfloor(yc);
fractx = xc - static_cast<float>(x0);
fracty = yc - static_cast<float>(y0);
featurePoints.clear();
//Dummy points : FIX ME : Remove them
featurePoints[100.f] = NzVector2f(0.f,0.f);
featurePoints[101.f] = NzVector2f(0.f,0.f);
featurePoints[102.f] = NzVector2f(0.f,0.f);
featurePoints[103.f] = NzVector2f(0.f,0.f);
SquareTest(x0,y0,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(fractx < it->first)
SquareTest(x0 - 1,y0,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(1.f - fractx < it->first)
SquareTest(x0 + 1,y0,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(fracty < it->first)
SquareTest(x0,y0 - 1,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(1.f - fracty < it->first)
SquareTest(x0,y0 + 1,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(fractx < it->first &&
fracty < it->first)
SquareTest(x0 - 1, y0 - 1,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(1.f - fractx < it->first &&
fracty < it->first)
SquareTest(x0 + 1, y0 - 1,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(fractx < it->first &&
1.f - fracty < it->first)
SquareTest(x0 - 1, y0 + 1,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
if(1.f - fractx < it->first &&
1.f - fracty < it->first)
SquareTest(x0 + 1, y0 + 1,xc,yc);
it = featurePoints.begin();
std::advance(it,m_function);
//Remove dummy points
featurePoints.erase(--(featurePoints.end()));
featurePoints.erase(--(featurePoints.end()));
featurePoints.erase(--(featurePoints.end()));
featurePoints.erase(--(featurePoints.end()));
return it->first * scale[m_function];
}
float Worley::Get(float x, float y, float scale) const
{
std::map<float, Vector2f> featurePoints;
float xc, yc;
int x0, y0;
float fractx, fracty;
xc = x * scale;
yc = y * scale;
x0 = fastfloor(xc);
y0 = fastfloor(yc);
fractx = xc - static_cast<float>(x0);
fracty = yc - static_cast<float>(y0);
featurePoints.clear();
SquareTest(x0,y0,xc,yc,featurePoints);
std::size_t functionIndex = static_cast<std::size_t>(m_function);
auto it = featurePoints.begin();
std::advance(it, functionIndex);
if(fractx < it->first)
SquareTest(x0 - 1,y0,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if(1.f - fractx < it->first)
SquareTest(x0 + 1,y0,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if(fracty < it->first)
SquareTest(x0,y0 - 1,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if (1.f - fracty < it->first)
SquareTest(x0,y0 + 1,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if (fractx < it->first && fracty < it->first)
SquareTest(x0 - 1, y0 - 1,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if (1.f - fractx < it->first && fracty < it->first)
SquareTest(x0 + 1, y0 - 1,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if (fractx < it->first && 1.f - fracty < it->first)
SquareTest(x0 - 1, y0 + 1,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
if(1.f - fractx < it->first && 1.f - fracty < it->first)
SquareTest(x0 + 1, y0 + 1,xc,yc,featurePoints);
it = featurePoints.begin();
std::advance(it, functionIndex);
return it->first * m_functionScales[functionIndex];
}