Fix shadow and bump issue.

Normand Briere

2019-06-09 cd87df088b1850ba0c90beb6c866c443e4eaf3b9

Fix shadow and bump issue.

 CameraPane.java
..
..
@@ -12502,8 +12502,8 @@
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            // display shadow only (bump == 0)
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          "SUB temp.x, half.x, shadow.x;" +
12505
-         "MOV temp.y, -params6.x;" +
12506
-         "SLT temp.z, temp.y, zero.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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          "SUB temp.y, one.x, temp.z;" +
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          "MUL temp.x, temp.x, temp.y;" +
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          "KIL temp.x;" +
..
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@@ -12834,7 +12834,7 @@
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             //once = true;
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         }
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-        System.out.print("Program #" + mode + "; length = " + program.length());
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+        System.out.print("Program #" + mode + "; instructions = " + program.split(";").length + "; length = " + program.length());
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         System.out.println(" - " + (mode >> 3) + " lights; " + ((mode & 2) == 2 ? "anisoUV " : "") + ((mode & 4) == 4 ? "SoftShadow " : ""));
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         loadProgram(gl, GL.GL_FRAGMENT_PROGRAM_ARB, program);
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..
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@@ -12967,12 +12967,16 @@
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                 "ADD " + depth + ".z, " + depth + ".z, temp.x;" +
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                 //"SUB " + depth + ".z, " + depth + ".z, temp.x;" + // back face shadowing!
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+                
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+                // Compare fragment depth in light space with shadowmap.
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                 "SUB temp.x, fragment.texcoord[1].z, " + depth + ".z;" +
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                 "SGE temp.y, temp.x, zero.x;" +
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-                "SUB " + shadow + ".y, one.x, temp.y;" +
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+                "SUB " + shadow + ".y, one.x, temp.y;" + // Specular is fully occluded
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+                
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+                // Reverse comparison
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                 "SUB temp.x, one.x, temp.x;" +
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                 "MUL " + shadow + ".x, temp.x, temp.y;" +
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-                "SUB " + shadow + ".x, one.x, " + shadow + ".x;" + // specular is fully occluded
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+                "SUB " + shadow + ".x, one.x, " + shadow + ".x;" + // diffuse
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                 "POW " + shadow + ".x, " + shadow + ".x, params5.z;" + // fake depth
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                 "SLT " + shadow + ".z, fragment.texcoord[1].z, " + depth + ".z;" +
..
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@@ -12987,6 +12991,10 @@
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                 "DP3 temp.x, normal, lightd;" +
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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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+
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+                // No shadow when out of frustrum
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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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                 "";
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     }
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