public CaveValue GetValue(float x, float y, float z, int height)
{
CaveValue result = _cave.GetValue(x, y, z, height);
//result.highHeight = result.highHeight * _scale + _bias;
//result.lowHeight = result.lowHeight * _scale + _bias;
return(result);
}
public AbstractCave(int seed, float rateInMap)
{
_seed = seed;
_rateInMap = rateInMap;
InitCaveGenerator();
_scale = 1.0f;
_caveValue = new CaveValue();
_caveValue.type = CaveType;
}
protected override CaveValue checkValue(CaveValue value, int height)
{
value.highHeight = (value.highHeight - value.lowHeight > 7 && value.highHeight - value.lowHeight < 10) ? value.lowHeight + 5 : value.highHeight;
value.highHeight = (value.highHeight - value.lowHeight > 9) ? value.lowHeight : value.highHeight;
if (value.highHeight < height && value.highHeight >= value.lowHeight && value.highHeight - value.lowHeight >= 3)
{
value.highHeight = value.lowHeight + 5;
}
if (value.highHeight > height + 6)
{
value.lowHeight -= 30;
value.highHeight -= 30;
return(checkValue(value, height));
}
return(value);
}
protected override CaveValue checkValue(CaveValue value, int height)
{
value.highHeight = (value.highHeight - value.lowHeight > 10 && value.highHeight - value.lowHeight < 15) ? value.lowHeight + 5 : value.highHeight;
value.highHeight = (value.highHeight - value.lowHeight > 14) ? value.lowHeight : value.highHeight;
if (value.highHeight < height && value.highHeight >= value.lowHeight && value.highHeight - value.lowHeight <= 6 && value.highHeight - value.lowHeight >= 3)
{
value.highHeight = value.lowHeight + 8;
}
if (value.highHeight - value.lowHeight > 7)
{
value.highHeight = value.lowHeight + 7 - (value.highHeight - value.lowHeight - 7);
}
if (value.highHeight < height - 30)
{
value.lowHeight += 20;
value.highHeight += 20;
return(checkValue(value, height));
}
return(value);
}
protected override CaveValue checkValue(CaveValue value, int height)
{
value.highHeight = (value.highHeight - value.lowHeight > 12 && value.highHeight - value.lowHeight < 15) ? (value.lowHeight + 8) : value.highHeight;
value.highHeight = (value.highHeight - value.lowHeight > 14) ? (value.lowHeight) : value.highHeight;
if (value.highHeight - value.lowHeight < 2)
{
value.highHeight = value.lowHeight;
}
if (value.highHeight - value.lowHeight > 9)
{
value.highHeight = value.lowHeight + 9 - (value.highHeight - value.lowHeight - 9);
}
if (value.highHeight > height + 1)
{
value.lowHeight -= 20;
value.highHeight -= 20;
return(checkValue(value, height));
}
return(value);
}
public CaveValue GetValue(float x, float y, float z, int height)
{
float cv = _controller.GetValue(x, z);
if (cv > 1)
{
cv = 1;
}
if (cv < 0)
{
cv = 0;
}
float curTotalRate = 0;
for (int i = 0; i < _caves.Length; i++)
{
float curTerrainRate = _caves[i].RateInMap / _totalRate;
float preRate = curTotalRate;
//解决精度问题
if (_caves.Length - 1 == i)
{
curTotalRate = 1f;
}
else
{
curTotalRate += curTerrainRate;
}
if (cv <= curTotalRate)
{
CaveValue curTerrainValue = _caves[i].GetValue(x, y, z, height);
if (_fallOff[i] > 0)
{
float a;
CaveValue tempA;
CaveValue tempB;
float curFallout = curTerrainRate * _fallOff[i];
if (cv < preRate + curFallout && i - 1 >= 0)
{
int j = i - 1;
tempA = curTerrainValue;
tempB = _caves[j].GetValue(x, y, z, height);
var lc = preRate - _caves[j].RateInMap / _totalRate * _fallOff[j];
var uc = preRate + curFallout;
a = MapCubicSCurve((cv - lc) / (uc - lc));
_caveValue.type = tempA.type;
_caveValue = InterpolateLinear(tempB, tempA, a);
return(_caveValue);
}
if (cv < curTotalRate - curFallout)
{
return(_caves[i].GetValue(x, y, z, height));
}
if (cv < curTotalRate && i < _caves.Length - 1)
{
int j = i + 1;
tempA = curTerrainValue;
tempB = _caves[j].GetValue(x, y, z, height);
var lc = curTotalRate - curFallout;
var uc = curTotalRate + _caves[j].RateInMap / _totalRate * _fallOff[j];
a = MapCubicSCurve((cv - lc) / (uc - lc));
_caveValue.type = tempA.type;
_caveValue = InterpolateLinear(tempA, tempB, a);
return(_caveValue);
}
return(_caves[i].GetValue(x, y, z, height));
}
else
{
return(curTerrainValue);
}
}
}
throw new Exception("传入的概率不正确!");
}
private CaveValue InterpolateLinear(CaveValue a, CaveValue b, float position)
{
a.highHeight = Convert.ToInt32((1.0f - position) * a.highHeight + (position * b.highHeight));
a.lowHeight = Convert.ToInt32((1.0f - position) * a.lowHeight + (position * b.lowHeight));
return(a);
}
protected virtual CaveValue checkValue(CaveValue value, int height)
{
return(value);
}