Impostors: continue work on depth, getting closer

1 files changed, 14 insertions, 3 deletions

diff --git a/Scripts/Impostors.cs b/Scripts/Impostors.cs
index e1447b6..9769aa1 100644
--- a/Scripts/Impostors.cs
+++ b/Scripts/Impostors.cs
@@ -298,17 +298,25 @@ public class Impostors : MonoBehaviour
     Color[] origAlpha = preserveAlpha ? (Color[])alpha.Clone() : null;
     Color[] buffer = (Color[])pixels.Clone();
 
+    bool[] filled = new bool[pixels.Length];
+    for (int i = 0; i < pixels.Length; i++)
+      filled[i] = alpha[i].a > 0.01f;
+    bool[] filledNext = new bool[filled.Length];
+
     int[] dx = { -1, 1, 0, 0 };
     int[] dy = { 0, 0, -1, 1 };
 
     for (int iter = 0; iter < iterations; iter++)
     {
+      System.Array.Copy(pixels, buffer, pixels.Length);
+      System.Array.Copy(filled, filledNext, filled.Length);
+
       for (int y = 0; y < h; y++)
       {
         for (int x = 0; x < w; x++)
         {
           int i = y * w + x;
-          if (alpha[i].a > 0.01f) continue;
+          if (filled[i]) continue;
 
           Color sum = Color.clear;
           int count = 0;
@@ -317,7 +325,7 @@ public class Impostors : MonoBehaviour
             int nx = x + dx[d], ny = y + dy[d];
             if (nx < 0 || nx >= w || ny < 0 || ny >= h) continue;
             int ni = ny * w + nx;
-            if (alpha[ni].a > 0.01f || (iter > 0 && pixels[ni].a > 0))
+            if (filled[ni])
             {
               sum += pixels[ni];
               count++;
@@ -327,10 +335,12 @@ public class Impostors : MonoBehaviour
           {
             buffer[i] = sum / count;
             buffer[i].a = 1;
+            filledNext[i] = true;
           }
         }
       }
-      var tmp = pixels; pixels = buffer; buffer = tmp;
+      var tmpFilled = filled; filled = filledNext; filledNext = tmpFilled;
+      var tmpPixels = pixels; pixels = buffer; buffer = tmpPixels;
     }
 
     if (preserveAlpha)
@@ -488,6 +498,7 @@ public class Impostors : MonoBehaviour
       impostorMaterial.SetFloat("_Impostors_Sphere_Radius", sphere_radius_);
       impostorMaterial.SetFloat("_Impostors_Near_Clip", nearClippingDistance);
       impostorMaterial.SetFloat("_Impostors_Far_Clip", sphere_radius_ * 2f + nearClippingDistance);
+      impostorMaterial.SetFloat("_ZTest", (float)UnityEngine.Rendering.CompareFunction.LessEqual);
       impostorMaterial.SetFloat("_Impostors_Enabled", 1);
       impostorMaterial.SetFloat("_Impostors_Parallax", 1);
       impostorMaterial.SetFloat("_Cull", (float)UnityEngine.Rendering.CullMode.Front);