protected float computeBevel(TerrainModifierData data, int x, int y)
{
int deltaX;
int deltaY;
int xMax;
int yMax;
float factor;
if (data.bevel == "taper")
{
if (data.shape == "ellipse")
{
deltaX = x - data.x0;
deltaY = y - data.y0;
xMax = data.dx;
yMax = data.dy;
factor = ((deltaX * deltaX) + (deltaY * deltaY));
factor /= ((xMax * xMax) + (yMax * yMax));
}
else
{
// pyramid
xMax = data.dx / 2 + data.dx % 2;
yMax = data.dy / 2 + data.dy % 2;
deltaX = Math.Abs(data.x0 + xMax - x);
deltaY = Math.Abs(data.y0 + yMax - y);
factor = Math.Max(((float)(deltaY) / yMax), ((float)(deltaX) / xMax));
}
}
else
{
factor = 0.0f;
}
return(factor);
}
protected void applyModification(ITerrainChannel map, TerrainModifierData data)
{
bool[,] mask;
int xMax;
int yMax;
int xMid;
int yMid;
if (data.shape == "ellipse")
{
mask = this.ellipticalMask(data.dx, data.dy);
xMax = mask.GetLength(0);
yMax = mask.GetLength(1);
xMid = xMax / 2 + xMax % 2;
yMid = yMax / 2 + yMax % 2;
}
else
{
mask = this.rectangularMask(data.dx, data.dy);
xMax = mask.GetLength(0);
yMax = mask.GetLength(1);
xMid = 0;
yMid = 0;
}
// m_log.DebugFormat("Apply {0} mask {1}x{2} @ {3},{4}", data.shape, xMax, yMax, xMid, yMid);
float[,] buffer = new float[map.Width, map.Height];
for (int x = data.x0; x < xMax; ++x)
{
for (int y = data.y0; y < yMax; ++y)
{
buffer[x, y] = map[x, y];
}
}
int yDim = yMax;
while (--yDim >= 0)
{
int yPos = data.y0 + yDim - yMid;
if ((yPos >= 0) && (yPos < map.Height))
{
int xDim = xMax;
while (--xDim >= 0)
{
int xPos = data.x0 + xDim - xMid;
if ((xPos >= 0) && (xPos < map.Width) && (mask[xDim, yDim]))
{
double endElevation = this.operate(buffer, data, xPos, yPos);
map[xPos, yPos] = (float)endElevation;
}
}
}
}
}
protected String parseParameters(string[] args, out TerrainModifierData data)
{
string val;
string arg;
string result;
data = new TerrainModifierData();
data.shape = String.Empty;
data.bevel = String.Empty;
data.dx = 0;
data.dy = 0;
if (args.Length < 4)
{
result = "Usage: " + GetUsage();
}
else
{
result = this.parseFloat(args[3], out data.elevation);
}
if (result == String.Empty)
{
int index = 3;
while(++index < args.Length && result == String.Empty)
{
arg = args[index];
// check for shape
if (arg.StartsWith("-rec=") || arg.StartsWith("-ell="))
{
if (data.shape != String.Empty)
{
result = "Only 1 '-rec' or '-ell' parameter is permitted.";
}
else
{
data.shape = arg.StartsWith("-ell=") ? "ellipse" : "rectangle";
val = arg.Substring(arg.IndexOf("=") + 1);
string[] coords = val.Split(new char[] {','});
if ((coords.Length < 3) || (coords.Length > 4))
{
result = String.Format("Bad format for shape parameter {0}", arg);
}
else
{
result = this.parseInt(coords[0], out data.x0);
if (result == String.Empty)
{
result = this.parseInt(coords[1], out data.y0);
}
if (result == String.Empty)
{
result = this.parseInt(coords[2], out data.dx);
}
if (result == String.Empty)
{
if (coords.Length == 4)
{
result = this.parseInt(coords[3], out data.dy);
}
else
{
data.dy = data.dx;
}
}
if (result == String.Empty)
{
if ((data.dx <= 0) || (data.dy <= 0))
{
result = "Shape sizes must be positive integers";
}
}
else
{
result = String.Format("Bad value in shape parameters {0}", arg);
}
}
}
}
else if (arg.StartsWith("-taper="))
{
if (data.bevel != String.Empty)
{
result = "Only 1 '-taper' parameter is permitted.";
}
else
{
data.bevel = "taper";
val = arg.Substring(arg.IndexOf("=") + 1);
result = this.parseFloat(val, out data.bevelevation);
if (result != String.Empty)
{
result = String.Format("Bad format for taper parameter {0}", arg);
}
}
}
else
{
result = String.Format("Unrecognized parameter {0}", arg);
}
}
}
return result;
}
public abstract double operate(double[,] map, TerrainModifierData data, int x, int y);
protected double computeBevel(TerrainModifierData data, int x, int y)
{
int deltaX;
int deltaY;
int xMax;
int yMax;
double factor;
if (data.bevel == "taper")
{
if (data.shape == "ellipse")
{
deltaX = x - data.x0;
deltaY = y - data.y0;
xMax = data.dx;
yMax = data.dy;
factor = (double)((deltaX * deltaX) + (deltaY * deltaY));
factor /= ((xMax * xMax) + (yMax * yMax));
}
else
{
// pyramid
xMax = data.dx / 2 + data.dx % 2;
yMax = data.dy / 2 + data.dy % 2;
deltaX = Math.Abs(data.x0 + xMax - x);
deltaY = Math.Abs(data.y0 + yMax - y);
factor = Math.Max(((double)(deltaY) / yMax), ((double)(deltaX) / xMax));
}
}
else
{
factor = 0.0;
}
return factor;
}
protected void applyModification(ITerrainChannel map, TerrainModifierData data)
{
bool[,] mask;
int xMax;
int yMax;
int xMid;
int yMid;
if (data.shape == "ellipse")
{
mask = this.ellipticalMask(data.dx, data.dy);
xMax = mask.GetLength(0);
yMax = mask.GetLength(1);
xMid = xMax / 2 + xMax % 2;
yMid = yMax / 2 + yMax % 2;
}
else
{
mask = this.rectangularMask(data.dx, data.dy);
xMax = mask.GetLength(0);
yMax = mask.GetLength(1);
xMid = 0;
yMid = 0;
}
// m_log.DebugFormat("Apply {0} mask {1}x{2} @ {3},{4}", data.shape, xMax, yMax, xMid, yMid);
double[,] buffer = map.GetDoubles();
int yDim = yMax;
while(--yDim >= 0)
{
int yPos = data.y0 + yDim - yMid;
if ((yPos >= 0) && (yPos < map.Height))
{
int xDim = xMax;
while(--xDim >= 0)
{
int xPos = data.x0 + xDim - xMid;
if ((xPos >= 0) && (xPos < map.Width) && (mask[xDim, yDim]))
{
double endElevation = this.operate(buffer, data, xPos, yPos);
map[xPos, yPos] = endElevation;
}
}
}
}
}
public override double operate(double[,] map, TerrainModifierData data, int x, int y)
{
double factor = this.computeBevel(data, x, y);
double result = data.elevation - (data.elevation - data.bevelevation) * factor;
return result;
}
protected String parseParameters(string[] args, out TerrainModifierData data)
{
string val;
string arg;
string result;
data = new TerrainModifierData();
data.shape = String.Empty;
data.bevel = String.Empty;
data.dx = 0;
data.dy = 0;
if (args.Length < 4)
{
result = "Usage: " + GetUsage();
}
else
{
result = this.parseFloat(args[3], out data.elevation);
}
if (result == String.Empty)
{
int index = 3;
while (++index < args.Length && result == String.Empty)
{
arg = args[index];
// check for shape
if (arg.StartsWith("-rec=") || arg.StartsWith("-ell="))
{
if (data.shape != String.Empty)
{
result = "Only 1 '-rec' or '-ell' parameter is permitted.";
}
else
{
data.shape = arg.StartsWith("-ell=") ? "ellipse" : "rectangle";
val = arg.Substring(arg.IndexOf("=") + 1);
string[] coords = val.Split(new char[] { ',' });
if ((coords.Length < 3) || (coords.Length > 4))
{
result = String.Format("Bad format for shape parameter {0}", arg);
}
else
{
result = this.parseInt(coords[0], out data.x0);
if (result == String.Empty)
{
result = this.parseInt(coords[1], out data.y0);
}
if (result == String.Empty)
{
result = this.parseInt(coords[2], out data.dx);
}
if (result == String.Empty)
{
if (coords.Length == 4)
{
result = this.parseInt(coords[3], out data.dy);
}
else
{
data.dy = data.dx;
}
}
if (result == String.Empty)
{
if ((data.dx <= 0) || (data.dy <= 0))
{
result = "Shape sizes must be positive integers";
}
}
else
{
result = String.Format("Bad value in shape parameters {0}", arg);
}
}
}
}
else if (arg.StartsWith("-taper="))
{
if (data.bevel != String.Empty)
{
result = "Only 1 '-taper' parameter is permitted.";
}
else
{
data.bevel = "taper";
val = arg.Substring(arg.IndexOf("=") + 1);
result = this.parseFloat(val, out data.bevelevation);
if (result != String.Empty)
{
result = String.Format("Bad format for taper parameter {0}", arg);
}
}
}
else
{
result = String.Format("Unrecognized parameter {0}", arg);
}
}
}
return(result);
}
public abstract float operate(float[,] map, TerrainModifierData data, int x, int y);
public override double operate(double[,] map, TerrainModifierData data, int x, int y)
{
double factor = this.computeBevel(data, x, y);
double noise = TerrainUtil.PerlinNoise2D((double)x / map.GetLength(0), (double)y / map.GetLength(1), 8, 1.0);
return map[x, y] + (data.elevation - (data.elevation - data.bevelevation) * factor) * (noise - .5);
}
public override double operate(double[,] map, TerrainModifierData data, int x, int y)
{
double[] scale = new double[3];
scale[0] = data.elevation;
scale[1] = ((1.0 - scale[0]) * data.bevelevation) / 8.0;
scale[2] = ((1.0 - scale[0]) * (1.0 - data.bevelevation)) / 16.0;
int xMax = map.GetLength(0);
int yMax = map.GetLength(1);
double result;
if ((x == 0) || (y == 0) || (x == (xMax - 1)) || (y == (yMax - 1)))
{
result = map[x, y];
}
else
{
result = 0.0;
for(int yPos = (y - 2); yPos < (y + 3); yPos++)
{
int yVal = (yPos <= 0) ? 0 : ((yPos < yMax) ? yPos : yMax - 1);
for(int xPos = (x - 2); xPos < (x + 3); xPos++)
{
int xVal = (xPos <= 0) ? 0 : ((xPos < xMax) ? xPos : xMax - 1);
int dist = Math.Max(Math.Abs(x - xVal), Math.Abs(y - yVal));
result += map[xVal, yVal] * scale[dist];
}
}
}
return result;
}
public abstract double operate(double[,] map, TerrainModifierData data, int x, int y);