//Rotate an image by increments of 90 degrees
public static PixelMatrix RotateSq(PixelMatrix original, int rotates)
{
//No more rotates
if (rotates == 0)
{
return(original);
}
//Setup new rotated
int side = Mathf.Max(original.width, original.height);
PixelMatrix rotated = new PixelMatrix(side, side, Color.clear);
//Rotate 90º
for (int i = 0; i < original.width; i++)
{
int finalI = original.width - i - 1;
for (int j = 0; j < original.height; j++)
{
rotated.SetPixelSafe(j, finalI, original.GetPixelSafe(i, j));
}
}
//Call new rotation
rotated = RotateSq(rotated, rotates - 1);
return(rotated);
}
//Add a decal to an image
public static PixelMatrix Decal(PixelMatrix original, PixelMatrix decal, int x, int y)
{
//Offsets to apply
int widthOffset = -decal.width / 2 + x;
int heightOffset = -decal.height / 2 + y;
for (int i = 0; i < decal.width; i++)
{
//X offset
int finalX = i + widthOffset;
//Skip column if out of original
if (finalX < 0 || finalX > original.width - 1)
{
continue;
}
for (int j = 0; j < decal.height; j++)
{
//Get color
Color cl = decal.GetPixelSafe(i, j);
//Skip transparent pixels
//TODO Blend with transparency?
if (cl.a < 0.7)
{
continue;
}
//Y offset
int finalY = j + heightOffset;
//Apply color
original.SetPixel(finalX, finalY, cl);
}
}
return(original);
}