New images and code for Examples 2.0

java/examples/Topics/Geometry/NoiseSphere/NoiseSphere.pde

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+/**
+ * Noise Sphere 
+ * by David Pena.  
+ * 
+ * Uniform random distribution on the surface of a sphere. 
+ */
+
+int cuantos = 4000;
+Pelo[] lista ;
+float[] z = new float[cuantos]; 
+float[] phi = new float[cuantos]; 
+float[] largos = new float[cuantos]; 
+float radio;
+float rx = 0;
+float ry =0;
+
+void setup() {
+  size(640, 360, P3D);
+  radio = height/3;
+  lista = new Pelo[cuantos];
+  for (int i=0; i<cuantos; i++) {
+    lista[i] = new Pelo();
+  }
+  noiseDetail(3);
+}
+
+void draw() {
+  background(0);
+  translate(width/2, height/2);
+
+  float rxp = ((mouseX-(width/2))*0.005);
+  float ryp = ((mouseY-(height/2))*0.005);
+  rx = (rx*0.9)+(rxp*0.1);
+  ry = (ry*0.9)+(ryp*0.1);
+  rotateY(rx);
+  rotateX(ry);
+  fill(0);
+  noStroke();
+  sphere(radio);
+
+  for (int i = 0;i < cuantos; i++) {
+    lista[i].dibujar();
+  }
+}
+
+
+class Pelo
+{
+  float z = random(-radio, radio);
+  float phi = random(TWO_PI);
+  float largo = random(1.15, 1.2);
+  float theta = asin(z/radio);
+
+  void dibujar() {
+    float off = (noise(millis() * 0.0005, sin(phi))-0.5) * 0.3;
+    float offb = (noise(millis() * 0.0007, sin(z) * 0.01)-0.5) * 0.3;
+
+    float thetaff = theta+off;
+    float phff = phi+offb;
+    float x = radio * cos(theta) * cos(phi);
+    float y = radio * cos(theta) * sin(phi);
+    float z = radio * sin(theta);
+    float msx= screenX(x, y, z);
+    float msy= screenY(x, y, z);
+
+    float xo = radio * cos(thetaff) * cos(phff);
+    float yo = radio * cos(thetaff) * sin(phff);
+    float zo = radio * sin(thetaff);
+
+    float xb = xo * largo;
+    float yb = yo * largo;
+    float zb = zo * largo;
+
+    beginShape(LINES);
+    stroke(0);
+    vertex(x, y, z);
+    stroke(200, 150);
+    vertex(xb, yb, zb);
+    endShape();
+  }
+}
+

java/examples/Topics/Geometry/SpaceJunk/Cube.pde

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+
+class Cube {
+
+  // Properties
+  int w, h, d;
+  int shiftX, shiftY, shiftZ;
+
+  // Constructor
+  Cube(int w, int h, int d, int shiftX, int shiftY, int shiftZ){
+    this.w = w;
+    this.h = h;
+    this.d = d;
+    this.shiftX = shiftX;
+    this.shiftY = shiftY;
+    this.shiftZ = shiftZ;
+  }
+
+  // Main cube drawing method, which looks 
+  // more confusing than it really is. It's 
+  // just a bunch of rectangles drawn for 
+  // each cube face
+  void drawCube(){
+    beginShape(QUADS);
+    // Front face
+    vertex(-w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, h + shiftY, -d/2 + shiftZ); 
+    vertex(-w/2 + shiftX, h + shiftY, -d/2 + shiftZ); 
+
+    // Back face
+    vertex(-w/2 + shiftX, -h/2 + shiftY, d + shiftZ); 
+    vertex(w + shiftX, -h/2 + shiftY, d + shiftZ); 
+    vertex(w + shiftX, h + shiftY, d + shiftZ); 
+    vertex(-w/2 + shiftX, h + shiftY, d + shiftZ);
+
+    // Left face
+    vertex(-w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+    vertex(-w/2 + shiftX, -h/2 + shiftY, d + shiftZ); 
+    vertex(-w/2 + shiftX, h + shiftY, d + shiftZ); 
+    vertex(-w/2 + shiftX, h + shiftY, -d/2 + shiftZ); 
+
+    // Right face
+    vertex(w + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, -h/2 + shiftY, d + shiftZ); 
+    vertex(w + shiftX, h + shiftY, d + shiftZ); 
+    vertex(w + shiftX, h + shiftY, -d/2 + shiftZ); 
+
+    // Top face
+    vertex(-w/2 + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, -h/2 + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, -h/2 + shiftY, d + shiftZ); 
+    vertex(-w/2 + shiftX, -h/2 + shiftY, d + shiftZ); 
+
+    // Bottom face
+    vertex(-w/2 + shiftX, h + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, h + shiftY, -d/2 + shiftZ); 
+    vertex(w + shiftX, h + shiftY, d + shiftZ); 
+    vertex(-w/2 + shiftX, h + shiftY, d + shiftZ); 
+
+    endShape(); 
+
+    // Add some rotation to each box for pizazz.
+    rotateY(radians(1));
+    rotateX(radians(1));
+    rotateZ(radians(1));
+  }
+}

java/examples/Topics/Geometry/SpaceJunk/SpaceJunk.pde

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+/**
+ * Space Junk  
+ * by Ira Greenberg (zoom suggestion by Danny Greenberg).
+ * 
+ * Rotating cubes in space using a custom Cube class. 
+ * Color controlled by light sources. Move the mouse left
+ * and right to zoom.
+ */
+
+// Used for oveall rotation
+float ang;
+
+// Cube count-lower/raise to test performance
+int limit = 500;
+
+// Array for all cubes
+Cube[]cubes = new Cube[limit];
+
+void setup() {
+  size(640, 360, P3D); 
+  background(0); 
+  noStroke();
+
+  // Instantiate cubes, passing in random vals for size and postion
+  for (int i = 0; i< cubes.length; i++){
+    cubes[i] = new Cube(int(random(-10, 10)), int(random(-10, 10)), 
+                        int(random(-10, 10)), int(random(-140, 140)), 
+                        int(random(-140, 140)), int(random(-140, 140)));
+  }
+}
+
+void draw(){
+  background(0); 
+  fill(200);
+
+  // Set up some different colored lights
+  pointLight(51, 102, 255, 65, 60, 100); 
+  pointLight(200, 40, 60, -65, -60, -150);
+
+  // Raise overall light in scene 
+  ambientLight(70, 70, 10); 
+
+  // Center geometry in display windwow.
+  // you can change 3rd argument ('0')
+  // to move block group closer(+)/further(-)
+  translate(width/2, height/2, -200 + mouseX * 0.65);
+
+  // Rotate around y and x axes
+  rotateY(radians(ang));
+  rotateX(radians(ang));
+
+  // Draw cubes
+  for (int i = 0; i < cubes.length; i++){
+    cubes[i].drawCube();
+  }
+  
+  // Used in rotate function calls above
+  ang += 0.2;
+}
+
+