Complete min shader.

Normand Briere

2019-07-23 0f4fa9dc4191aaee9661c1e6d73725436ae64ac2

 CameraPane.java
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@@ -12400,7 +12400,52 @@
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         //gl.glProgramEnvParameter4fvARB(GL.GL_FRAGMENT_PROGRAM_ARB, 127, lightParams, 0);
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         String program =
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+                // Min shader
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                 "!!ARBfp1.0\n" +
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+                "PARAM zero123      = { 0.0, 1.0, 2.0, 1.25 };" +
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+                "PARAM pow2      = { 0.5, 0.25, 0.125, 0.0 };" +
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+                "PARAM one      = { 1.0, 1.0, 1.0, 1.0 };" +
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+                "PARAM eps      = { 0.001, 0.001, 0.001, 1.0 };" +
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+                "PARAM infinity  = { 100000000, 100000000, 100000000, 1.0 };" +
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+                "TEMP temp;" +
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+                "TEMP light;" +
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+                "TEMP ndotl;" +
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+                "TEMP normal;" +
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+                "TEMP depth;" +
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+                
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+                "MAD normal, fragment.color, zero123.z, -zero123.y;" +
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+                
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+                "MOV light, state.light[0].position;" +
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+                "DP3 ndotl.x, light, normal;" +
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+
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+                // shadow
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+                "MOV temp, fragment.texcoord[1];" +
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+                TextureFetch("depth", "temp", "1") +
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+                //"TEX depth, fragment.texcoord[1], texture[1], 2D;" +
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+                "SLT temp.x, fragment.texcoord[1].z, depth.z;" +
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+                
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+
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+                // No shadow when out of frustum
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+                //"SGE temp.y, depth.z, zero123.y;" +
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+                //"LRP temp.x, temp.y, zero123.y, temp.x;" +
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+                
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+                "MUL ndotl.x, ndotl.x, temp.x;" +
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+                "MAX ndotl.x, ndotl.x, pow2.y;" +
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+                
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+                "TEX temp, fragment.texcoord[0], texture[0], 2D;" +
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+                "LRP temp, zero123.w, temp, one;" + // texture proportion
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+                "MUL temp, temp, ndotl.x;" +
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+                
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+                "MUL temp, temp, zero123.z;" +
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+                
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+                "MOV temp.w, zero123.y;" + // reset alpha
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+                
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+                "MOV result.color, temp;" +
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+                "END";
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+        
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+        String program2 =
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+                "!!ARBfp1.0\n" +
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+                
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                 //"OPTION ARB_fragment_program_shadow;" +
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                 "PARAM light2cam0   = program.env[10];" +
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                 "PARAM light2cam1   = program.env[11];" +
..
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@@ -12515,8 +12560,7 @@
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                 "TEMP shininess;" +
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                 "\n" +
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                 "MOV texSamp, one;" +
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-                //"TEX texSamp, fragment.texcoord[0], texture[0], 2D;" +
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-
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+                
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                 "MOV mapgrid.x, one2048th.x;" +
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                 "MOV temp, fragment.texcoord[1];" +
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                 /*
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@@ -12921,7 +12965,7 @@
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                 "MAD shadow.x, buffer.x, frac.y, shadow.x;" +
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                 "") +
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-           // display shadow only (bump == 0)
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+           // display shadow only (fakedepth == 0)
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          "SUB temp.x, half.x, shadow.x;" +
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          "MOV temp.y, -params5.z;" + // params6.x;" +
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          "SLT temp.z, temp.y, -one2048th.x;" +
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@@ -13353,20 +13397,20 @@
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         return "TEX " + dest + ", " + src + ", texture[" + unit + "], 2D;" +
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                 "SGE " + src + ".w, " + src + ".x, eps.x;" +
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                 "SGE " + src + ".z, " + src + ".y, eps.x;" +
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+                "SLT " + dest + ".x, " + src + ".x, one.x;" +
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+                "SLT " + dest + ".y, " + src + ".y, one.x;" +
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                 "MUL " + src + ".w, " + src + ".z, " + src + ".w;" +
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-                "SLT " + src + ".z, " + src + ".x, one.x;" +
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-                "MUL " + src + ".w, " + src + ".z, " + src + ".w;" +
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-                "SLT " + src + ".z, " + src + ".y, one.x;" +
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-                "MUL " + src + ".w, " + src + ".z, " + src + ".w;" +
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+                "MUL " + src + ".w, " + dest + ".x, " + src + ".w;" +
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+                "MUL " + src + ".w, " + dest + ".y, " + src + ".w;" +
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                 //"SWZ buffer, temp, w,w,w,w;";
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-                "MUL " + dest + ".z, " + dest + ".z, " + src + ".w;" +
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+                //"MUL " + dest + ".z, " + dest + ".z, " + src + ".w;" +
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                 "SUB " + src + ".z, " + "one.x, " + src + ".w;" +
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                 //"MUL " + src + ".z, " + src + ".z, infinity.x;" +
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                 //"ADD " + dest + ".z, " + dest + ".z, " + src + ".z;";
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-                "MAD " + dest + ".z, " + src + ".z, infinity.x," + dest + ".z;";
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+                //"MAD " + dest + ".z, " + src + ".z, infinity.x," + dest + ".z;";
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-    //"LRP " + dest + ".z, " + src + ".w," + dest + ".z, infinity.x;";
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-    //"LRP " + dest + ".z" + ", " + src + ".w, infinity.x," + dest + ".z;";
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+    //?? "LRP " + dest + ".z, " + src + ".w," + dest + ".z, infinity.x;";
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+    "LRP " + dest + ".z, " + src + ".z, infinity.x," + dest + ".z;";
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     }
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     String Shadow(String depth, String shadow)
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@@ -13413,7 +13457,7 @@
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                 "SLT temp.x, temp.x, zero.x;" + // shadoweps
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                 "LRP " + shadow + ", temp.x, one, " + shadow + ";" +
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-                // No shadow when out of frustrum
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+                // No shadow when out of frustum
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                 "SGE temp.x, " + depth + ".z, one.z;" +
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                 "LRP " + shadow + ", temp.x, one, " + shadow + ";" +
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                 "";