Noise.cpp

#include "Noise.h"
#include "PerlinNoise.h"

Vector3f Noise::getColor(const Vector3f & pos)
{
	//Fill in this function  ONLY.
	//INTERPOLATE BETWEEN TWO COLORS BY WEIGHTED AVERAGE

	float M;
	float w = frequency;
	float a = amplitude;
	
	M = sin(w*pos[0] + a*PerlinNoise::octaveNoise(pos, octaves));
  
	M = (M+1.0f)/2.0f;

	return M*color[0] + (1-M)*color[1];
}

Noise::Noise (int _octaves,const Vector3f & color1, const Vector3f &color2,float freq,float amp):
octaves(_octaves),frequency(freq),amplitude(amp)
{
	color[0] = color1;
	color[1] = color2;
	init = true;
}

Noise::Noise(const Noise & n):
octaves(n.octaves),frequency(n.frequency),amplitude(n.amplitude),init(n.init)
{
	color[0] = n.color[0];
	color[1] = n.color[1];
}

bool Noise::valid()
{
	return init;
}

Noise::Noise():
octaves(0),init(false)
{}