/// <param name="maxInside">
/// Maximum pixel distance measured inside the edge, resulting in an alpha value of 1.
/// If set to or below 0, everything inside will have an alpha value of 1.
/// </param>
/// <param name="maxOutside">
/// Maximum pixel distance measured outside the edge, resulting in an alpha value of 0.
/// If set to or below 0, everything outside will have an alpha value of 0.
/// </param>
/// <param name="postProcessDistance">
/// Pixel distance from the edge within which pixels will be post-processed using the edge gradient.
/// </param>
static void SetColor(int x, int y, float value, float scale)
{
var col = img.PixelUnSafe(x, y);
col.r = value;
col.g = value;
col.b = value;
img.SetPixelUnSafe(x, y, col);
}
public static void Generate(
ImageMeta image,
float maxInside,
float maxOutside,
float postProcessDistance)
{
width = image.width;
height = image.height;
img = image;
pixels = new Pixel[width, height];
int x, y;
float scale;
//Color c = Color.black;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
pixels[x, y] = new Pixel();
}
}
if (maxInside > 0f)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
pixels[x, y].originalValue = 1f - image.PixelUnSafe(x, y).grayscale;
}
}
ComputeEdgeGradients();
GenerateDistanceTransform();
if (postProcessDistance > 0f)
{
PostProcess(postProcessDistance);
}
scale = 1f / maxInside;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
SetColor(x, y, Mathf.Clamp01(pixels[x, y].distance * scale), scale);
}
}
}
if (maxOutside > 0f)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
pixels[x, y].originalValue = image.PixelUnSafe(x, y).r;
}
}
ComputeEdgeGradients();
GenerateDistanceTransform();
if (postProcessDistance > 0f)
{
PostProcess(postProcessDistance);
}
scale = 1f / maxOutside;
if (maxInside > 0f)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
float value = 0.5f + (image.PixelUnSafe(x, y).r - Mathf.Clamp01(pixels[x, y].distance * scale)) * 0.5f;
SetColor(x, y, value, scale);
}
}
}
else
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
var value = Mathf.Clamp01(1f - pixels[x, y].distance * scale);
SetColor(x, y, value, scale);
}
}
}
}
pixels = null;
}
