public override void Apply(Heightmap targetHeightmap, Bitmap targetBitmap, int x, int y, double size, double speed, double deltaTime)
{
double radius = size;
//Make a bounding box around the circle
int startX = (int)((double)x - size);
int endX = (int)((double)x + size);
int startY = (int)((double)y - size);
int endY = (int)((double)y + size);
//Make sure the corners are in bounds
startX = Utils.CapBounds(startX, 0, targetHeightmap.width);
endX = Utils.CapBounds(endX, 0, targetHeightmap.width);
startY = Utils.CapBounds(startY, 0, targetHeightmap.height);
endY = Utils.CapBounds(endY, 0, targetHeightmap.height);
//Loop through the bounding box, skipping any pixels that fall outside the circle
int centerX = x;
int centerY = y; //Save x and y, since we're using those variable names in the loop
for (x = startX; x < endX; x++)
{
for (y = startY; y < endY; y++)
{
//Skip this pixel if it's not within the radius
double squaredDist = (x - centerX) * (x - centerX) + (y - centerY) * (y - centerY);
if (squaredDist > radius * radius)
{
continue;
}
//Make it so the speed decreases as it gets further from the center
double distPercent = squaredDist / (radius * radius);
double scaledSpeed = Utils.Lerp(speed, 0, distPercent);
//Change the height at this position
double val = targetHeightmap.GetValue(x, y);
val += scaledSpeed * deltaTime;
//Ensure the value stays within the limits
if (Math.Abs(val) > Heightmap.MAX_HEIGHT)
{
val = Math.Sign(val) * Heightmap.MAX_HEIGHT;
}
//Apply the height change
targetHeightmap.SetValue(x, y, val);
targetBitmap.SetPixel(x, y, Heightmap.ValueToColor(val));
}
} //End of double for loop
} //End of function
public override void Apply(Heightmap targetHeightmap, Bitmap targetBitmap, int x, int y, double size, double speed, double deltaTime)
{
//Make a square around the coordinates
int startX = (int)((double)x - size / 2);
int endX = (int)((double)x + size / 2);
int startY = (int)((double)y - size / 2);
int endY = (int)((double)y + size / 2);
//Make sure the corners of the square are in bounds
startX = Utils.CapBounds(startX, 0, targetHeightmap.width);
endX = Utils.CapBounds(endX, 0, targetHeightmap.width);
startY = Utils.CapBounds(startY, 0, targetHeightmap.height);
endY = Utils.CapBounds(endY, 0, targetHeightmap.height);
//Iterate through the square, applying the logic to it.
for (x = startX; x < endX; x++)
{
for (y = startY; y < endY; y++)
{
//Change the height at this position
double val = targetHeightmap.GetValue(x, y);
val += speed * deltaTime;
//Ensure the value stays within the limits
if (Math.Abs(val) > Heightmap.MAX_HEIGHT)
{
val = Math.Sign(val) * Heightmap.MAX_HEIGHT;
}
//Apply the height change
targetHeightmap.SetValue(x, y, val);
targetBitmap.SetPixel(x, y, Heightmap.ValueToColor(val));
}
}
}
