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using System;
using System.Collections.Generic;
using System.Text;
namespace libTerrain
{
partial class Channel
{
///
/// Produces a set of coordinates defined by an edge point. Eg - 0 = 0,0. 256 = 0,256. 512 = 256,256
/// Assumes a 256^2 heightmap. This needs fixing for input values of w,h
///
///
///
///
///
private int[] RadialEdge256(int val)
{
// Four cases:
// 1. 000..255 return 0,val
// 2. 256..511 return val - 256,255
// 3. 512..767 return 255, val - 511
// 4. 768..1023 return val - 768,0
int[] ret = new int[2];
if (val < 256)
{
ret[0] = 0;
ret[1] = val;
return ret;
}
if (val < 512)
{
ret[0] = (val % 256);
ret[1] = 255;
return ret;
}
if (val < 768)
{
ret[0] = 255;
ret[1] = 255 - (val % 256);
return ret;
}
if (val < 1024)
{
ret[0] = 255 - (val % 256);
ret[1] = 255;
return ret;
}
throw new Exception("Out of bounds parameter (val)");
}
public void Fracture(int number, double scalemin, double scalemax)
{
Random rand = new Random(seed);
for (int i = 0; i < number; i++)
{
int[] a, b;
a = RadialEdge256(rand.Next(1023)); // TODO: Broken
b = RadialEdge256(rand.Next(1023)); // TODO: Broken
double z = rand.NextDouble();
double u = rand.NextDouble();
double v = rand.NextDouble();
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
double miny = Tools.linearInterpolate(a[1], b[1], (double)x / (double)w);
if (v >= 0.5)
{
if (u >= 0.5)
{
if (y > miny)
{
map[x, y] += Tools.linearInterpolate(scalemin, scalemax, z);
}
}
else
{
if (y < miny)
{
map[x, y] += Tools.linearInterpolate(scalemin, scalemax, z);
}
}
}
else
{
if (u >= 0.5)
{
if (x > miny)
{
map[x, y] += Tools.linearInterpolate(scalemin, scalemax, z);
}
}
else
{
if (x < miny)
{
map[x, y] += Tools.linearInterpolate(scalemin, scalemax, z);
}
}
}
}
}
}
Normalise();
}
}
}