Initial Commit

Java/Processing/processing-3.3.6/modes/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();
+  }
+}
+