float Noise::interpolateNoise(float x, float y)
{
int wholePartX = (int) x; // Same as flooring.
float fractionPartX = x - wholePartX;
int wholePartY = (int) y;
float fractionPartY = y - wholePartY;
float v1 = nextFloat(wholePartX, wholePartY);
float v2 = nextFloat(wholePartX + 1, wholePartY);
float v3 = nextFloat(wholePartX, wholePartY + 1);
float v4 = nextFloat(wholePartX + 1, wholePartY + 1);
float i1 = InterpolateCubic(v1, v2, fractionPartX);
float i2 = InterpolateCubic(v3, v4, fractionPartX);
return InterpolateCubic(i1, i2, fractionPartY);
}
Float next1D() {
/* Skip over dimensions that were reserved to arrays */
if (m_dimension >= m_arrayStartDim && m_dimension < m_arrayEndDim)
m_dimension = m_arrayEndDim;
if (m_dimension >= primeTableSize)
Log(EError, "Lookup dimension exceeds the prime number table size! "
"You may have to reduce the 'maxDepth' parameter of your integrator.");
uint64_t index = m_offset + m_stride * m_sampleIndex;
return nextFloat(index);
}
Point2 next2D() {
/* Skip over dimensions that were reserved to arrays */
if (m_dimension + 1 >= m_arrayStartDim && m_dimension < m_arrayEndDim)
m_dimension = m_arrayEndDim;
if (m_dimension + 1 >= primeTableSize)
Log(EError, "Lookup dimension exceeds the prime number table size! "
"You may have to reduce the 'maxDepth' parameter of your integrator.");
uint64_t index = m_offset + m_stride * m_sampleIndex;
Float value1, value2;
if (m_dimension == 0) {
value1 = nextFloat(index) * m_primePowers.x - m_pixelPosition.x;
value2 = nextFloat(index) * m_primePowers.y - m_pixelPosition.y;
} else {
value1 = nextFloat(index);
value2 = nextFloat(index);
}
return Point2(value1, value2);
}
std::string TrampolineMgr::ArgumentWalker::next(char type)
{
std::stringstream ss;
void* ptr;
if (type == 'u')
ss << unsigned(nextInt());
else if (type == 'i')
ss << nextInt();
else if (type == 'q')
ss << nextLL();
else if (type == 'f')
ss << nextFloat();
else if (type == 'd')
ss << nextDouble();
else if (type == 'p' || isupper(type))
ss << nextPointer();
else if (type == 'c')
ss << char(nextInt());
else if (type == 's')
{
const char* s = (const char*) nextPointer();
ss << (void*)s;
if (s)
ss << " \"" << safeString(s) << '"';
}
else if (type == 'v')
ss << "(void)";
else
ss << '?';
if (isupper(type))
m_pointers.push_back(std::make_pair(tolower(type), ptr));
return ss.str();
}
float Random::nextFloatRange( float lo, float hi )
{
float range = hi - lo;
return( lo + range * nextFloat() );
}
Vector4f Random::nextVector4f()
{
return Vector4f( nextFloat(), nextFloat(), nextFloat(), nextFloat() );
}
