void square(Hmp left, Hmp right, Hmp bottom, Hmp top, float randomScope)
{
int cnt = 0;
float amount = 0;
if (isLegelHmp(left))
{
amount += getHmpv(left);
cnt++;
}
if (isLegelHmp(right))
{
amount += getHmpv(right);
cnt++;
}
if (isLegelHmp(bottom))
{
amount += getHmpv(bottom);
cnt++;
}
if (isLegelHmp(top))
{
amount += getHmpv(top);
cnt++;
}
float centerValue = amount / cnt + (float)((_randomGen.NextDouble() - 0.5) * 2) * randomScope;
Hmp center = new Hmp(top.x, left.y);
setHmpv(center, centerValue);
}
void diamond(Hmp lb, Hmp lt, Hmp rb, Hmp rt, float randomScope)
{
int centerX = (lb.x + rt.x) / 2;
int centerY = (lb.y + rt.y) / 2;
Hmp center = new Hmp(centerX, centerY);
float centerValue = 0.25f * (getHmpv(lb) + getHmpv(lt) + getHmpv(rb) + getHmpv(rt)) +
(_flagCenterDown ? -((float)(_randomGen.NextDouble() + 0.5f) * randomScope) * center_deep_scale : (float)((_randomGen.NextDouble() - 0.5) * 2) * randomScope);
_flagCenterDown = false;
setHmpv(center, centerValue);
/*
* float nextRandomScope = randomScope * reduce_rate;
* // left square
* square (new Hmp (lb.x + lb.x - center.x, center.y), center, lb, lt, nextRandomScope);
*
* // right square
* square (center, new Hmp (rb.x + rb.x - center.x, center.y), rb, rt, nextRandomScope);
*
* // bottom square
* square (lb, rb, new Hmp (center.x, lb.y + lb.y - center.y), center, nextRandomScope);
*
* // top square
* square (lt, rt, center, new Hmp (center.x, lt.y + lt.y - center.y), nextRandomScope);
*/
}
void setHmpv(Hmp p, float v)
{
_heightMap [p.x, p.y] = v;
if (v < _minHeight)
{
_minHeight = v;
_minHeightPosition = p;
}
_maxHeight = Mathf.Max(_maxHeight, v);
}
bool isLegelHmp(Hmp p)
{
int width = _heightMap.GetLength(0);
return(p.x >= 0 && p.x < width && p.y >= 0 && p.y < width);
}
float getHmpv(Hmp p)
{
return(_heightMap [p.x, p.y]);
}
