| public Sample ( float x, float y, bool wrap = true, bool useCosineInterpolation = false ) : Color4 | ||
| x | float | value within range 0..1 |
| y | float | value within range 0..1 |
| wrap | bool | |
| useCosineInterpolation | bool | |
| return | Color4 | |
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="img"></param>
public void Copy ( int offsetX, int offsetY, Image img )
{
for (int x=0; x<img.Width; x++) {
for (int y=0; y<img.Height; y++) {
Write( offsetX + x, offsetY + y, img.Sample( x, y ) );
}
}
}
/// <summary>
/// http://www.lighthouse3d.com/opengl/terrain/index.php3?particle
/// </summary>
/// <param name="iterations"></param>
/// <param name="displace"></param>
/// <returns></returns>
public static Image ParticleDeposition ( int sizeX, int sizeY, int iterations, float displace )
{
var rand = new Random();
var image = new Image( sizeX, sizeY );
int x = rand.Next() % sizeX;
int y = rand.Next() % sizeY;
var disp = new Color4( displace, displace, displace, displace );
for (int i=0; i<iterations; i++) {
int dir = rand.Next(4);
if (dir==0) x++;
if (dir==1) x--;
if (dir==2) y++;
if (dir==3) y--;
var value = image.Sample(x,y);
image.Write( x,y, value + disp );
}
return image;
}
