private void OnEnable () {
source = Selection.activeObject as Texture2D;
rgbFillMode = (RGBFillMode)EditorPrefs.GetInt(rgbModeKey);
insideDistance = EditorPrefs.GetFloat(insideDistanceKey, 3f);
outsideDistance = EditorPrefs.GetFloat(outsideDistanceKey, 3f);
postProcessDistance = EditorPrefs.GetFloat(postProcessDistanceKey);
}
void OnEnable()
{
source = Selection.activeObject as Texture2D;
rgbFillMode = (RGBFillMode)EditorPrefs.GetInt(rgbModeKey);
insideDistance = EditorPrefs.GetFloat(insideDistanceKey, 3f);
outsideDistance = EditorPrefs.GetFloat(outsideDistanceKey, 3f);
postProcessDistance = EditorPrefs.GetFloat(postProcessDistanceKey);
}
/// <summary>
/// Fill a texture with a signed distance field generated from the alpha channel of a source texture.
/// </summary>
/// <param name="source">
/// Source texture. Alpha values of 1 are considered inside, values of 0 are considered outside, and any other values are considered
/// to be on the edge. Must be readable.
/// </param>
/// <param name="destination">
/// Destination texture. Must be the same size as the source texture. Must be readable.
/// The texture change does not get applied automatically, you need to do that yourself.
/// </param>
/// <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>
/// <param name="rgbMode">
/// How to fill the destination texture's RGB channels.
/// </param>
public static void Generate(
Texture2D source,
Texture2D destination,
float maxInside,
float maxOutside,
float postProcessDistance,
RGBFillMode rgbMode)
{
if (source.height != destination.height || source.width != destination.width)
{
Debug.LogError("Source and destination textures must be the same size.");
return;
}
width = source.width;
height = source.height;
pixels = new Pixel[width, height];
int x, y;
float scale;
Color c = rgbMode == RGBFillMode.White ? Color.white : 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].alpha = 1f - source.GetPixel(x, y).a;
}
}
ComputeEdgeGradients();
GenerateDistanceTransform();
if (postProcessDistance > 0f)
{
PostProcess(postProcessDistance);
}
scale = 1f / maxInside;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c.a = Mathf.Clamp01(pixels[x, y].distance * scale);
destination.SetPixel(x, y, c);
}
}
}
if (maxOutside > 0f)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
pixels[x, y].alpha = source.GetPixel(x, y).a;
}
}
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++)
{
c.a = 0.5f + (destination.GetPixel(x, y).a -
Mathf.Clamp01(pixels[x, y].distance * scale)) * 0.5f;
destination.SetPixel(x, y, c);
}
}
}
else
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c.a = Mathf.Clamp01(1f - pixels[x, y].distance * scale);
destination.SetPixel(x, y, c);
}
}
}
}
if (rgbMode == RGBFillMode.Distance)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c = destination.GetPixel(x, y);
c.r = c.a;
c.g = c.a;
c.b = c.a;
destination.SetPixel(x, y, c);
}
}
}
else if (rgbMode == RGBFillMode.Source)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c = source.GetPixel(x, y);
c.a = destination.GetPixel(x, y).a;
destination.SetPixel(x, y, c);
}
}
}
pixels = null;
}
/// <summary>
/// Fill a texture with a signed distance field generated from the alpha channel of a source texture.
/// </summary>
/// <param name="source">
/// Source texture. Alpha values of 1 are considered inside, values of 0 are considered outside, and any other values are considered
/// to be on the edge. Must be readable.
/// </param>
/// <param name="destination">
/// Destination texture. Must be the same size as the source texture. Must be readable.
/// The texture change does not get applied automatically, you need to do that yourself.
/// </param>
/// <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>
/// <param name="rgbMode">
/// How to fill the destination texture's RGB channels.
/// </param>
public static void Generate(
Image <Rgba32> source,
Image <Rgba32> destination,
float maxInside,
float maxOutside,
float postProcessDistance,
RGBFillMode rgbMode)
{
if (source.Height != destination.Height || source.Width != destination.Width)
{
Console.Out.WriteLine("Source and destination textures must be the same size.");
return;
}
width = source.Width;
height = source.Height;
pixels = new Pixel[width, height];
int x, y;
float scale;
Rgba32 c = rgbMode == RGBFillMode.White ? Color.White : 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].alpha = source.GetPixel(x, y).R / 255f;
}
}
ComputeEdgeGradients();
GenerateDistanceTransform();
if (postProcessDistance > 0f)
{
PostProcess(postProcessDistance);
}
scale = 1f / maxInside;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c.A = (byte)(255f * Math.Clamp(pixels[x, y].distance * scale, 0, 1));
destination.SetPixel(x, y, c);
}
}
}
if (maxOutside > 0f)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
pixels[x, y].alpha = 1f - source.GetPixel(x, y).R / 255f;
}
}
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++)
{
c.A = (byte)(255f * (0.5f + (destination.GetPixel(x, y).A / 255f -
Math.Clamp(pixels[x, y].distance * scale, 0, 1)) * 0.5f));
destination.SetPixel(x, y, c);
}
}
}
else
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c.A = (byte)(255f * Math.Clamp(1f - pixels[x, y].distance * scale, 0, 1));
destination.SetPixel(x, y, c);
}
}
}
}
if (rgbMode == RGBFillMode.Distance)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c = destination.GetPixel(x, y);
c.R = c.A;
c.G = c.A;
c.B = c.A;
destination.SetPixel(x, y, c);
}
}
}
else if (rgbMode == RGBFillMode.Source)
{
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
c = source.GetPixel(x, y);
c.A = destination.GetPixel(x, y).A;
destination.SetPixel(x, y, c);
}
}
}
pixels = null;
}
void OnGUI()
{
GUILayout.BeginArea(new Rect(2f, 2f, 220f, position.height - 4f));
EditorGUI.BeginChangeCheck();
source = (Texture2D)EditorGUILayout.ObjectField(sourceTextureContent, source, typeof(Texture2D), false);
if (EditorGUI.EndChangeCheck())
{
DestroyImmediate(destination);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
rgbFillMode = (RGBFillMode)EditorGUILayout.EnumPopup(rgbFillModeContent, rgbFillMode);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetInt(rgbModeKey, (int)rgbFillMode);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
insideDistance = EditorGUILayout.FloatField(insideContent, insideDistance);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetFloat(insideDistanceKey, insideDistance);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
outsideDistance = EditorGUILayout.FloatField(outsideContent, outsideDistance);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetFloat(outsideDistanceKey, outsideDistance);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
postProcessDistance = EditorGUILayout.FloatField(postprocessContent, postProcessDistance);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetFloat(postProcessDistanceKey, postProcessDistance);
allowSave = false;
}
if (source != null && GUILayout.Button("Generate"))
{
Generate();
}
if (allowSave && GUILayout.Button("Save PNG file"))
{
SaveTexture();
}
GUILayout.EndArea();
if (destination != null)
{
scrollPosition = GUI.BeginScrollView(
new Rect(224f, 2f, position.width - 226f, position.height - 4f),
scrollPosition,
new Rect(0f, 0f, destination.width, destination.height));
EditorGUI.DrawTextureAlpha(new Rect(0f, 0f, destination.width, destination.height), destination);
GUI.EndScrollView();
}
}
private void OnGUI () {
GUILayout.BeginArea(new Rect(2f, 2f, 220f, position.height - 4f));
EditorGUI.BeginChangeCheck();
source = (Texture2D)EditorGUILayout.ObjectField(sourceTextureContent, source, typeof(Texture2D), false);
if (EditorGUI.EndChangeCheck()) {
DestroyImmediate(destination);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
rgbFillMode = (RGBFillMode)EditorGUILayout.EnumPopup(rgbFillModeContent, rgbFillMode);
if (EditorGUI.EndChangeCheck()) {
EditorPrefs.SetInt(rgbModeKey, (int)rgbFillMode);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
insideDistance = EditorGUILayout.FloatField(insideContent, insideDistance);
if (EditorGUI.EndChangeCheck()) {
EditorPrefs.SetFloat(insideDistanceKey, insideDistance);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
outsideDistance = EditorGUILayout.FloatField(outsideContent, outsideDistance);
if (EditorGUI.EndChangeCheck()) {
EditorPrefs.SetFloat(outsideDistanceKey, outsideDistance);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
postProcessDistance = EditorGUILayout.FloatField(postprocessContent, postProcessDistance);
if (EditorGUI.EndChangeCheck()) {
EditorPrefs.SetFloat(postProcessDistanceKey, postProcessDistance);
allowSave = false;
}
if (source != null && GUILayout.Button("Generate")) {
Generate();
}
if (allowSave && GUILayout.Button("Save PNG file")) {
string filePath = EditorUtility.SaveFilePanel(
"Save Signed Distance Field",
new FileInfo(AssetDatabase.GetAssetPath(source)).DirectoryName,
source.name + " SDF",
"png");
if (filePath.Length > 0) {
File.WriteAllBytes(filePath, destination.EncodeToPNG());
AssetDatabase.Refresh();
}
}
GUILayout.EndArea();
if (destination != null) {
scrollPosition = GUI.BeginScrollView(
new Rect(224f, 2f, position.width - 226f, position.height - 4f),
scrollPosition,
new Rect(0f, 0f, destination.width, destination.height));
EditorGUI.DrawTextureAlpha(new Rect(0f, 0f, destination.width, destination.height), destination);
GUI.EndScrollView();
}
}
private void OnGUI()
{
GUILayout.BeginArea(new Rect(2f, 2f, 220f, position.height - 4f));
EditorGUI.BeginChangeCheck();
source = (Texture2D)EditorGUILayout.ObjectField(sourceTextureContent, source, typeof(Texture2D), false);
if (EditorGUI.EndChangeCheck())
{
DestroyImmediate(destination);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
rgbFillMode = (RGBFillMode)EditorGUILayout.EnumPopup(rgbFillModeContent, rgbFillMode);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetInt(rgbModeKey, (int)rgbFillMode);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
insideDistance = EditorGUILayout.FloatField(insideContent, insideDistance);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetFloat(insideDistanceKey, insideDistance);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
outsideDistance = EditorGUILayout.FloatField(outsideContent, outsideDistance);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetFloat(outsideDistanceKey, outsideDistance);
allowSave = false;
}
EditorGUI.BeginChangeCheck();
postProcessDistance = EditorGUILayout.FloatField(postprocessContent, postProcessDistance);
if (EditorGUI.EndChangeCheck())
{
EditorPrefs.SetFloat(postProcessDistanceKey, postProcessDistance);
allowSave = false;
}
if (source != null && GUILayout.Button("Generate"))
{
Generate();
}
if (allowSave && GUILayout.Button("Save PNG file"))
{
string filePath = EditorUtility.SaveFilePanel(
"Save Signed Distance Field",
new FileInfo(AssetDatabase.GetAssetPath(source)).DirectoryName,
source.name + " SDF",
"png");
if (filePath.Length > 0)
{
File.WriteAllBytes(filePath, destination.EncodeToPNG());
AssetDatabase.Refresh();
}
}
GUILayout.EndArea();
if (destination != null)
{
scrollPosition = GUI.BeginScrollView(
new Rect(224f, 2f, position.width - 226f, position.height - 4f),
scrollPosition,
new Rect(0f, 0f, destination.width, destination.height));
EditorGUI.DrawTextureAlpha(new Rect(0f, 0f, destination.width, destination.height), destination);
GUI.EndScrollView();
}
}
