void add(uint[] buffer, int width, int height, Texture texture, int posx, int posy, int xsize, int ysize)
{
var w = xsize;
var h = ysize;
var xBase = posx;
var yBase = posy;
var tx = texture.width * 255;
var ty = texture.height * 255;
var tw = texture.width;
var dtx = tx / w;
var dty = ty / h;
var txBase = MathUtility.Crop(-xBase * dtx, 0, 255 * tx);
var tyBase = MathUtility.Crop(-yBase * dty, 0, 255 * ty);
var xend = MathUtility.Crop(xBase + w, 0, width);
var yend = MathUtility.Crop(yBase + h, 0, height);
int pos, offset1, offset2;
xBase = MathUtility.Crop(xBase, 0, width);
yBase = MathUtility.Crop(yBase, 0, height);
ty = tyBase;
for (var j = yBase; j < yend; j++)
{
tx = txBase;
offset1 = j * width;
offset2 = (ty >> 8) * tw;
for (var i = xBase; i < xend; i++)
{
buffer[i + offset1] = ColorUtility.add(texture.pixel[(tx >> 8) + offset2], pixel[i + offset1]);
tx += dtx;
}
ty += dty;
}
}
public Texture colorize(uint[] pal)
{
var range = (uint)pal.Length - 1;
for (var i = width * height - 1; i >= 0; i--)
{
pixel[i] = pal[MathUtility.Crop(pixel[i], 0, range)];
}
return(this);
}
public Texture valToGray()
{
uint intensity;
for (var i = width * height - 1; i >= 0; i--)
{
intensity = MathUtility.Crop(pixel[i], 0, 255);
pixel[i] = ColorUtility.getColor(intensity, intensity, intensity);
}
return(this);
}
// Perlin noise functions
static float perlin2d(float x, float y, float wavelength, float persistence, int samples)
{
float sum = 0;
var freq = 1f / wavelength;
var amp = persistence;
float range = 0;
for (var i = 0; i < samples; i++)
{
sum += amp * interpolatedNoise(x * freq, y * freq, i);
range += amp;
amp *= persistence;
freq *= 2;
}
return(MathUtility.Crop(sum / persistence * 0.5f + 0.5f, 0, 1));
}
public void setReflectivity(uint factor)
{
reflectivity = MathUtility.Crop(factor, 0, 255);
}
public void setTransparency(uint factor)
{
transparency = MathUtility.Crop(factor, 0, 255);
opaque = (transparency == 0);
}