Adding the shader examples

java/examples/Topics/Shaders/BadPrint/BadPrint.pde

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+// Bad-print shader. Adapted from rom Fluxus Shader Library:
+// http://www.pawfal.org/index.php?page=FluxusHardwareShaderLibrary
+
+import controlP5.*;
+
+ControlP5 controlP5;
+
+PShader badPrint;
+
+boolean enabled = true;
+float scaleR = 1.0, scaleG = 1.0, scaleB = 1.0;
+float offsetR = 0.2, offsetG = 0.2, offsetB = 0.2; 
+float registerR = 0.2, registerG = 0.2, registerB = 0.2;
+float sizeR = 0.1, sizeG = 0.2, sizeB = 0.1;
+
+public void setup() {
+  size(800, 800, P3D);
+
+  noStroke();
+  fill(204);
+
+  badPrint = loadShader("BadPrintFrag.glsl", "BadPrintVert.glsl");
+  
+  sphereDetail(60);
+  
+  controlP5 = new ControlP5(this);
+  controlP5.addToggle("enabled").linebreak();
+  controlP5.addSlider("scaleR", 0, 1);
+  controlP5.addSlider("scaleG", 0, 1);
+  controlP5.addSlider("scaleB", 0, 1).linebreak();  
+  controlP5.addSlider("offsetR", 0, 1);
+  controlP5.addSlider("offsetG", 0, 1);
+  controlP5.addSlider("offsetB", 0, 1).linebreak();  
+  controlP5.addSlider("registerR", 0, 1);
+  controlP5.addSlider("registerG", 0, 1);
+  controlP5.addSlider("registerB", 0, 1).linebreak();
+  controlP5.addSlider("sizeR", 0, 1);
+  controlP5.addSlider("sizeG", 0, 1);
+  controlP5.addSlider("sizeB", 0, 1).linebreak();  
+}
+
+public void draw() {
+  background(0);
+
+  if (enabled) {  
+    shader(badPrint);
+   
+    badPrint.set("Scale", scaleR, scaleG, scaleB);
+    badPrint.set("Offset", offsetR, offsetG, offsetB);
+    badPrint.set("Register", registerR, registerG, registerB);
+    badPrint.set("Size", sizeR, sizeG, sizeB);
+  } else {
+    resetShader(); 
+  }
+    
+  noStroke(); 
+  pointLight(204, 204, 204, 1000, 1000, 1000);
+  
+  pushMatrix();
+  translate(width/2, height/2); 
+  rotateX(frameCount * 0.01);
+  rotateY(frameCount * 0.01); 
+  sphere(200); 
+  popMatrix();
+  
+  hint(DISABLE_DEPTH_TEST);
+  noLights();
+  resetShader();
+  controlP5.draw();
+  hint(ENABLE_DEPTH_TEST);
+}

java/examples/Topics/Shaders/BadPrint/data/BadPrintFrag.glsl

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+// Copyright (C) 2007 Dave Griffiths
+// Licence: GPLv2 (see COPYING)
+// Fluxus Shader Library
+// ---------------------
+// BadPrint NPR Shader
+// This shader tries to emulate the effect
+// of a bad printing process. Can be controlled
+// with different settings for RGB
+
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+uniform vec3 Scale;
+uniform vec3 Offset;
+uniform vec3 Register;
+uniform vec3 Size;
+
+varying vec3 N;
+varying vec3 P;
+varying vec4 S;
+varying vec3 L;
+
+void main() { 
+  vec3 l = normalize(L);
+  vec3 n = normalize(N);
+  vec2 p = S.xy;
+
+  vec2 sr = p * Size.r + Register.r;
+  vec2 sg = p * Size.g + Register.g;
+  vec2 sb = p * Size.b + Register.b;
+
+  float diffuse = dot(l,n);
+    
+  float r = (sin(sr.x) + cos(sr.y)) * Scale.r + Offset.r + diffuse;
+  float g = (sin(sg.x) + cos(sg.y)) * Scale.g + Offset.g + diffuse;
+  float b = (sin(sb.x) + cos(sb.y)) * Scale.b + Offset.b + diffuse;
+ 
+  gl_FragColor = vec4(step(0.5, r), step(0.5, g), step(0.5, b), 1);
+}

java/examples/Topics/Shaders/BadPrint/data/BadPrintVert.glsl

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+// Copyright (C) 2007 Dave Griffiths
+// Licence: GPLv2 (see COPYING)
+// Fluxus Shader Library
+// ---------------------
+// BadPrint NPR Shader
+// This shader tries to emulate the effect
+// of a bad printing process. Can be controlled
+// with different settings for RGB
+
+uniform mat4 projectionMatrix;
+uniform mat4 projmodelviewMatrix;
+uniform mat3 normalMatrix;
+
+uniform vec4 lightPosition[8];
+
+attribute vec4 inVertex;
+attribute vec3 inNormal;
+
+varying vec3 N;
+varying vec3 P;
+varying vec4 S;
+varying vec3 L;
+
+void main() {    
+  N = normalize(normalMatrix * inNormal); 
+  P = inVertex.xyz;
+  gl_Position = projmodelviewMatrix * inVertex;
+  L = vec3(lightPosition[0] - gl_Position);
+  S = projectionMatrix * gl_Position;
+}