ShaderCode: Add defaultShaderCustomization(..) to prelude shader source w/ GLSL version and default precision (if GLES) - Used by GearsES2/RedSquare/PointDemo (Made GLSL version proof)

15 files changed, 104 insertions, 84 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
index f6b686d7e..378167c2c 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderCode.java
@@ -46,6 +46,7 @@ import java.util.Set;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
 import javax.media.opengl.GLES2;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 
 import jogamp.opengl.Debug;
@@ -806,6 +807,34 @@ public class ShaderCode {
         }
     }
 
+    /** {@value #es2_default_precision_vp} */
+    public static final String es2_default_precision_vp = "\nprecision highp float;\nprecision highp int;\n";
+    /** {@value #es2_default_precision_fp} */
+    public static final String es2_default_precision_fp = "\nprecision mediump float;\nprecision mediump int;\n/*precision lowp sampler2D;*/\n";
+    
+    /**
+     * Default customization of this shader source code.
+     * <p>
+     * Note: The shader source to be edit must be created using a mutable StringBuilder.
+     * </p>
+     * @param gl a GL context, which must have been made current once 
+     * @param preludeVersion if true {@link GLContext#getGLSLVersionString()} is preluded, otherwise not.
+     * @param es2DefaultPrecision optional default precision source code line(s) preluded if not null and if {@link GL#isGLES()}.
+     *        You may use {@link #es2_default_precision_fp} for fragment shader and {@link #es2_default_precision_vp} for vertex shader.
+     * @return the index after the inserted data, maybe 0 if nothing has be inserted.
+     */
+    public final int defaultShaderCustomization(GL2ES2 gl, boolean preludeVersion, String es2DefaultPrecision) {
+        int pos = 0;
+        if(preludeVersion) {
+            final String glslVersion_prelude = gl.getContext().getGLSLVersionString();
+            pos = insertShaderSource(0, pos, glslVersion_prelude);
+        }
+        if( gl.isGLES() && null != es2DefaultPrecision ) {
+            pos = insertShaderSource(0, pos, es2DefaultPrecision);
+        }
+        return pos;
+    }    
+    
     //----------------------------------------------------------------------
     // Internals only below this point
     //
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java
index 8c0addb78..5afc5e38c 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderUtil.java
@@ -162,7 +162,8 @@ public class ShaderUtil {
                 try {
                     final int[] param = new int[1];
                     gl.glGetIntegerv(GL2ES2.GL_NUM_SHADER_BINARY_FORMATS, param, 0);
-                    int numFormats = param[0];
+                    final int err = gl.glGetError();
+                    final int numFormats = GL.GL_NO_ERROR == err ? param[0] : 0;
                     if(numFormats>0) {
                         int[] formats = new int[numFormats];
                         gl.glGetIntegerv(GL2ES2.GL_SHADER_BINARY_FORMATS, formats, 0);
@@ -170,7 +171,7 @@ public class ShaderUtil {
                             info.shaderBinaryFormats.add(new Integer(formats[i]));
                         }
                     }
-                } catch (GLException gle) { gle.printStackTrace(); }                    
+                } catch (GLException gle) { System.err.println("Catched Exception: "+gle.getMessage()); gle.printStackTrace(); }                    
             }
         }
         return info.shaderBinaryFormats;
@@ -186,7 +187,8 @@ public class ShaderUtil {
                 try {
                     final byte[] param = new byte[1];
                     gl.glGetBooleanv(GL2ES2.GL_SHADER_COMPILER, param, 0);
-                    boolean v = param[0]!=(byte)0x00;
+                    final int err = gl.glGetError();
+                    boolean v = GL.GL_NO_ERROR == err && param[0]!=(byte)0x00;
                     if(!v) {
                         final Set<Integer> bfs = getShaderBinaryFormats(gl);
                         if(bfs.size()==0) {
@@ -196,7 +198,7 @@ public class ShaderUtil {
                     }
                     info.shaderCompilerAvailable = new Boolean(v);
                     queryOK = true;
-                } catch (GLException gle) { gle.printStackTrace(); }
+                } catch (GLException gle) { System.err.println("Catched Exception: "+gle.getMessage()); gle.printStackTrace(); }
                 if(!queryOK) {
                     info.shaderCompilerAvailable = new Boolean(true);
                 }                
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es1/GearsObjectES1.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es1/GearsObjectES1.java
index 1208dad61..8276c6bb9 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es1/GearsObjectES1.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es1/GearsObjectES1.java
@@ -47,10 +47,9 @@ public class GearsObjectES1 extends GearsObject {
     }
     
     @Override
-    public void addInterleavedVertexAndNormalArrays(GLArrayDataServer array,
-            int components) {
-        array.addFixedSubArray(GLPointerFunc.GL_VERTEX_ARRAY, 3, GL.GL_ARRAY_BUFFER);
-        array.addFixedSubArray(GLPointerFunc.GL_NORMAL_ARRAY, 3, GL.GL_ARRAY_BUFFER);
+    public void addInterleavedVertexAndNormalArrays(GLArrayDataServer array, int components) {
+        array.addFixedSubArray(GLPointerFunc.GL_VERTEX_ARRAY, components, GL.GL_ARRAY_BUFFER);
+        array.addFixedSubArray(GLPointerFunc.GL_NORMAL_ARRAY, components, GL.GL_ARRAY_BUFFER);
     }
 
     private void draw(GL2ES1 gl, GLArrayDataServer array, int mode) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java
index 47feb60e2..c4864b521 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsES2.java
@@ -120,7 +120,7 @@ public class GearsES2 implements GLEventListener {
         System.err.println("GL_VENDOR: " + gl.glGetString(GL.GL_VENDOR));
         System.err.println("GL_RENDERER: " + gl.glGetString(GL.GL_RENDERER));
         System.err.println("GL_VERSION: " + gl.glGetString(GL.GL_VERSION));
-        System.err.println("GL GLSL: "+gl.hasGLSL()+", has-compiler: "+gl.isFunctionAvailable("glCompileShader")+", version "+(gl.hasGLSL() ? gl.glGetString(GL2ES2.GL_SHADING_LANGUAGE_VERSION) : "none"));
+        System.err.println("GL GLSL: "+gl.hasGLSL()+", has-compiler: "+gl.isFunctionAvailable("glCompileShader")+", version "+(gl.hasGLSL() ? gl.glGetString(GL2ES2.GL_SHADING_LANGUAGE_VERSION) : "none")+", "+gl.getContext().getGLSLVersionNumber());
         System.err.println("GL FBO: basic "+ gl.hasBasicFBOSupport()+", full "+gl.hasFullFBOSupport());
         System.err.println("GL Profile: "+gl.getGLProfile());
         System.err.println("GL:" + gl + ", " + gl.getContext().getGLVersion());
@@ -130,9 +130,11 @@ public class GearsES2 implements GLEventListener {
         st = new ShaderState();
         // st.setVerbose(true);
         final ShaderCode vp0 = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, this.getClass(), "shader",
-                "shader/bin", "gears", false);
+                "shader/bin", "gears", true);
         final ShaderCode fp0 = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, this.getClass(), "shader",
-                "shader/bin", "gears", false);
+                "shader/bin", "gears", true);
+        vp0.defaultShaderCustomization(gl, true, ShaderCode.es2_default_precision_vp);
+        fp0.defaultShaderCustomization(gl, true, ShaderCode.es2_default_precision_fp);
         final ShaderProgram sp0 = new ShaderProgram();
         sp0.add(gl, vp0, System.err);
         sp0.add(gl, fp0, System.err);
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsObjectES2.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsObjectES2.java
index bb526e350..e8b97e287 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsObjectES2.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/GearsObjectES2.java
@@ -69,10 +69,9 @@ public class GearsObjectES2 extends GearsObject {
     }
     
     @Override
-    public void addInterleavedVertexAndNormalArrays(GLArrayDataServer array,
-            int components) {
-        array.addGLSLSubArray("vertices", 3, GL.GL_ARRAY_BUFFER);
-        array.addGLSLSubArray("normals", 3, GL.GL_ARRAY_BUFFER);
+    public void addInterleavedVertexAndNormalArrays(GLArrayDataServer array, int components) {
+        array.addGLSLSubArray("vertices", components, GL.GL_ARRAY_BUFFER);
+        array.addGLSLSubArray("normals", components, GL.GL_ARRAY_BUFFER);
     }
 
     private void draw(GL2ES2 gl, GLArrayDataServer array, int mode) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/PointsDemoES2.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/PointsDemoES2.java
index 27457e23c..1e0f9596f 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/PointsDemoES2.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/PointsDemoES2.java
@@ -58,20 +58,6 @@ public class PointsDemoES2 extends PointsDemo {
     /** ( pointSize, pointSmooth, attn. pointMinSize, attn. pointMaxSize ) , ( attenuation coefficients 1f 0f 0f, attenuation fade theshold 1f )   */
     private final FloatBuffer pointParams = Buffers.newDirectFloatBuffer(new float[] {  1.0f, 0.0f, 0.0f, 4096.0f, 1.0f, 0.0f, 0.0f, 1.0f }); 
 
-    static final String es2_prelude_vp = "#version 100\n\nprecision highp float;\nprecision highp int;\n";
-    static final String es2_prelude_fp = "#version 100\n\nprecision mediump float;\nprecision mediump int;\n/*precision lowp sampler2D;*/\n";
-    static final String gl2_prelude = "#version 120\n"; // GL 2.1 (Nvidia driver claims it's required to use gl_Points, OSX claim's it for gl_PointCoord -> driver bug - both were introduced w/ 1.10)
-    
-    private void customizeShader(GL2ES2 gl, ShaderCode vp, ShaderCode fp) {
-        if(gl.isGLES2()) {
-            vp.insertShaderSource(0, 0, es2_prelude_vp);
-            fp.insertShaderSource(0, 0, es2_prelude_fp);
-        } else {
-            vp.insertShaderSource(0, 0, gl2_prelude);
-            fp.insertShaderSource(0, 0, gl2_prelude);
-        }
-    }
-    
     public PointsDemoES2(int swapInterval) {
         this.swapInterval = swapInterval;
     }
@@ -108,7 +94,8 @@ public class PointsDemoES2 extends PointsDemo {
                 "shader/bin", "PointsShader", true);
         final ShaderCode fp0 = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, this.getClass(), "shader",
                 "shader/bin", "PointsShader", true);
-        customizeShader(gl, vp0, fp0);
+        vp0.defaultShaderCustomization(gl, true, ShaderCode.es2_default_precision_vp);
+        fp0.defaultShaderCustomization(gl, true, ShaderCode.es2_default_precision_fp);
         final ShaderProgram sp0 = new ShaderProgram();
         sp0.add(gl, vp0, System.err);
         sp0.add(gl, fp0, System.err);
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java
index fea1d752e..a78ae17a9 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/RedSquareES2.java
@@ -86,9 +86,11 @@ public class RedSquareES2 implements GLEventListener {
         st = new ShaderState();
         st.setVerbose(true);
         final ShaderCode vp0 = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, this.getClass(), "shader",
-                "shader/bin", "RedSquareShader", false);
+                "shader/bin", "RedSquareShader", true);
         final ShaderCode fp0 = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, this.getClass(), "shader",
-                "shader/bin", "RedSquareShader", false);
+                "shader/bin", "RedSquareShader", true);
+        vp0.defaultShaderCustomization(gl, true, ShaderCode.es2_default_precision_vp);
+        fp0.defaultShaderCustomization(gl, true, ShaderCode.es2_default_precision_fp);
         final ShaderProgram sp0 = new ShaderProgram();
         sp0.add(gl, vp0, System.err);
         sp0.add(gl, fp0, System.err);
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/newt/TestGearsES2NEWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/newt/TestGearsES2NEWT.java
index 1620985c1..d2c00f980 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/newt/TestGearsES2NEWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/newt/TestGearsES2NEWT.java
@@ -88,6 +88,7 @@ public class TestGearsES2NEWT extends UITestCase {
     static int loops = 1;
     static boolean loop_shutdown = false;
     static boolean forceES2 = false;
+    static boolean forceGL3 = false;
     
     @BeforeClass
     public static void initClass() {
@@ -256,7 +257,15 @@ public class TestGearsES2NEWT extends UITestCase {
     public void test01GL2ES2() throws InterruptedException {
         for(int i=1; i<=loops; i++) {
             System.err.println("Loop "+i+"/"+loops);
-            GLCapabilities caps = new GLCapabilities(forceES2 ? GLProfile.get(GLProfile.GLES2) : GLProfile.getGL2ES2());
+            final GLProfile glp;
+            if(forceGL3) {
+                glp = GLProfile.get(GLProfile.GL3);
+            } else if(forceES2) {
+                glp = GLProfile.get(GLProfile.GLES2);
+            } else {
+                glp = GLProfile.getGL2ES2();
+            }
+            GLCapabilities caps = new GLCapabilities( glp );
             caps.setBackgroundOpaque(opaque);
             if(-1 < forceAlpha) {
                 caps.setAlphaBits(forceAlpha); 
@@ -294,6 +303,8 @@ public class TestGearsES2NEWT extends UITestCase {
                 swapInterval = MiscUtils.atoi(args[i], swapInterval);
             } else if(args[i].equals("-es2")) {
                 forceES2 = true;
+            } else if(args[i].equals("-gl3")) {
+                forceGL3 = true;
             } else if(args[i].equals("-wait")) {
                 waitForKey = true;
             } else if(args[i].equals("-mouseInvisible")) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.fp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.fp
index 3e3be10b3..02efa1522 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.fp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.fp
@@ -1,4 +1,11 @@
 
+#if __VERSION__ >= 140
+  #define varying in
+  out vec4 mgl_FragColor;
+#else
+  #define mgl_FragColor gl_FragColor   
+#endif
+
 // [0].rgba: 0, smooth, attnMinSz, attnMaxSz
 // [1].rgba: attnCoeff(3), attnFadeTs
 uniform vec4 mgl_PointParams[2]; 
@@ -28,12 +35,12 @@ void main (void)
       #endif
 
       #ifndef TEST
-          gl_FragColor.a *= r1;
+          mgl_FragColor.a *= r1;
       #else
-          gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
-          gl_FragColor.r = r1 < 0.0 ? 1.0 : 0.0;
-          gl_FragColor.g = r > 1.0 ? 1.0 : 0.0;
-          gl_FragColor.b = r > border ? 1.0 : 0.0;
+          mgl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
+          mgl_FragColor.r = r1 < 0.0 ? 1.0 : 0.0;
+          mgl_FragColor.g = r > 1.0 ? 1.0 : 0.0;
+          mgl_FragColor.b = r > border ? 1.0 : 0.0;
       #endif
   }
 }
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.vp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.vp
index 5043a652b..873b1f834 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.vp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/PointsShader.vp
@@ -1,4 +1,9 @@
 
+#if __VERSION__ >= 140
+  #define attribute in
+  #define varying out
+#endif
+
 uniform vec4 mgl_ColorStatic;
 uniform mat4 mgl_PMVMatrix[4]; // P, Mv, Mvi and Mvit (transpose(inverse(ModelView)) == normalMatrix)
 
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.fp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.fp
index d3cfecd94..7cf059bae 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.fp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.fp
@@ -1,23 +1,16 @@
 // Copyright 2010 JogAmp Community. All rights reserved.
 
-/**
- * AMD complains: #version must occur before any other statement in the program
-#ifdef GL_ES
-    #version 100
+#if __VERSION__ >= 140
+  #define varying in
+  out vec4 mgl_FragColor;
 #else
-    #version 110
-#endif
- */
-
-#ifdef GL_ES
-  precision mediump float;
-  precision mediump int;
+  #define mgl_FragColor gl_FragColor   
 #endif
 
 varying   vec4    frontColor;
 
 void main (void)
 {
-    gl_FragColor = frontColor;
+    mgl_FragColor = frontColor;
 }
 
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.vp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.vp
index bfd44c8f4..2b19f3251 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.vp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader.vp
@@ -1,17 +1,8 @@
 // Copyright 2010 JogAmp Community. All rights reserved.
 
-/**
- * AMD complains: #version must occur before any other statement in the program
-#ifdef GL_ES
-    #version 100
-#else
-    #version 110
-#endif
- */
-
-#ifdef GL_ES
-  precision mediump float;
-  precision mediump int;
+#if __VERSION__ >= 140
+  #define attribute in
+  #define varying out
 #endif
 
 uniform mat4    mgl_PMVMatrix[2];
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader2.fp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader2.fp
index 01e4b0964..e0b92db3b 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader2.fp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/RedSquareShader2.fp
@@ -1,26 +1,16 @@
 // Copyright 2010 JogAmp Community. All rights reserved.
 
-/**
- * AMD complains: #version must occur before any other statement in the program
-#ifdef GL_ES
-    #version 100
+#if __VERSION__ >= 140
+  #define varying in
+  out vec4 mgl_FragColor;
 #else
-    #version 110
-#endif
- */
-
-#ifdef GL_ES
-  #define MEDIUMP mediump
-  #define HIGHP highp
-#else
-  #define MEDIUMP
-  #define HIGHP
+  #define mgl_FragColor gl_FragColor   
 #endif
 
 varying   HIGHP vec4    frontColor;
 
 void main (void)
 {
-    gl_FragColor = vec4(0.0, frontColor.g, frontColor.b, 1.0);
+    mgl_FragColor = vec4(0.0, frontColor.g, frontColor.b, 1.0);
 }
 
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.fp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.fp
index f41addad8..b8e9e0eee 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.fp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.fp
@@ -1,9 +1,11 @@
 // Copyright (C) 2011 JogAmp Community. All rights reserved.
 // Details see GearsES2.java
 
-#ifdef GL_ES
-  precision mediump float;
-  precision mediump int;
+#if __VERSION__ >= 140
+  #define varying in
+  out vec4 mgl_FragColor;
+#else
+  #define mgl_FragColor gl_FragColor   
 #endif
 
 uniform vec4 color;
@@ -42,5 +44,5 @@ void main()
         specular += color * pow(NdotHV, matShininess) * attenuation * matSpecular;
     }
         
-    gl_FragColor = ambient + diffuse + specular ;
+    mgl_FragColor = ambient + diffuse + specular ;
 }
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.vp b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.vp
index b2d77082b..e3a84b257 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.vp
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/es2/shader/gears.vp
@@ -1,10 +1,11 @@
 // Copyright (C) 2011 JogAmp Community. All rights reserved.
 // Details see GearsES2.java
 
-#ifdef GL_ES
-  precision mediump float;
-  precision mediump int;
+#if __VERSION__ >= 140
+  #define attribute in
+  #define varying out
 #endif
+
 uniform mat4 pmvMatrix[4]; // P, Mv, Mvi and Mvit
 uniform vec3 lightPos;