moving the OpenGL examples to the core

java/examples/OpenGL/Form/RunAmuck/Legs.pde

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+/**
+ * Legs class
+ * By Ira Greenberg <br />
+ * Processing for Flash Developers,
+ * Friends of ED, 2009
+ */
+ 
+class Legs {
+  // Instance properties with default values
+  float x = 0, y = 0, z = 0, w = 150, ht = 125;
+  color col = #77AA22;
+  // Advanced properties
+  float detailW = w/6.0;
+  float detailHt = ht/8.0;
+  float shoeBulge = detailHt*2.0;
+  float legGap = w/7.0;
+
+  // Dynamics properties
+  float velocity = .02, stepL, stepR, stepRate = random(10, 50); 
+  float speedX = 1.0, speedZ, spring, damping = .5, theta;
+
+  // Default constructor
+  Legs() {
+  }
+
+  // Standard constructor
+  Legs(float x, float z, float w, float ht, color col) {
+    this.x = x;
+    this.z = z;
+    this.w = w;
+    this.ht = ht;
+    this.col = col;
+    fill(col);
+    detailW = w/6.0;
+    detailHt = ht/8.0;
+    shoeBulge = detailHt*2.0;
+    legGap = w/7.0;
+    speedX = random(-speedX, speedX);
+  }
+
+  // Advanced constructor
+  Legs(float x, float z, float w, float ht, color col, float detailW, 
+        float detailHt, float shoeBulge, float legGap) {
+    this.x = x;
+    this.z = z;
+    this.w = w;
+    this.ht = ht;
+    this.col = col;
+    this.detailW = detailW;
+    this.detailHt = detailHt;
+    this.shoeBulge = shoeBulge;
+    this.legGap = legGap;
+    speedX = random(-speedX, speedX);
+  }
+
+  // Draw legs
+  void create() {
+    fill(col);
+    float footWidth = (w - legGap)/2;
+    beginShape();
+    vertex(x - w/2, y - ht, z);
+    vertex(x - w/2, y - ht + detailHt, z);
+    vertex(x - w/2 + detailW, y - ht + detailHt, z);
+    // left foot
+    vertex(x - w/2 + detailW,  y + stepL, z);
+    curveVertex(x - w/2 + detailW, y + stepL, z);
+    curveVertex(x - w/2 + detailW, y + stepL, z);
+    curveVertex(x - w/2 + detailW - shoeBulge,  y + detailHt/2 + stepL, z);
+    curveVertex(x - w/2,  y + detailHt + stepL, z);
+    curveVertex(x - w/2,  y + detailHt + stepL, z);
+    vertex(x - w/2 + footWidth,  y + detailHt + stepL*.9, z);
+    // end left foot
+    vertex(x - w/2 + footWidth + legGap/2,  y - ht + detailHt, z);
+    vertex(x - w/2 + footWidth + legGap/2,  y - ht + detailHt, z);
+    // right foot
+    vertex(x - w/2 + footWidth + legGap,  y + detailHt + stepR*.9, z);
+    vertex(x + w/2,  y + detailHt + stepR, z);
+    curveVertex(x + w/2,  y + detailHt + stepR, z);
+    curveVertex(x + w/2,  y + detailHt + stepR, z);
+    curveVertex(x + w/2 - detailW + shoeBulge,  y + detailHt/2 + stepR, z);
+    curveVertex(x + w/2 - detailW,  y + stepR, z);
+    vertex(x + w/2 - detailW,  y + stepR, z);
+    // end right foot
+    vertex(x + w/2 - detailW,  y - ht + detailHt, z);
+    vertex(x + w/2,  y - ht + detailHt, z);
+    vertex(x + w/2,  y - ht, z);
+    endShape(CLOSE);
+  }
+
+  // Set advanced property values
+  void setDetails(float detailW, float detailHt, float shoeBulge, float legGap) {
+    this.detailW = detailW;
+    this.detailHt = detailHt;
+    this.shoeBulge = shoeBulge;
+    this.legGap = legGap;
+  }
+
+  // Make the legs step
+  void step(float stepRate) {
+    this.stepRate = stepRate;
+    spring = ht/2.0;
+    stepL = sin(theta)*spring;
+    stepR = cos(theta)*spring;
+    theta += radians(stepRate);
+  }
+  
+  // Alternative overloaded step method
+  void step() {
+    spring = ht/2.0;
+    stepL = sin(theta)*spring;
+    stepR = cos(theta)*spring;
+    theta += radians(stepRate);
+  }
+
+
+  // Moves legs along x, y, z axes
+  void move() {
+    // Move legs along y-axis
+    y = stepR*damping;
+
+    // Move legs along x-axis and
+    // check for collision against frame edge
+    x += speedX;
+    if (screenX(x, y, z) > width) {
+      speedX *= -1;
+    }
+    if (screenX(x, y, z) < 0) {
+      speedX *= -1;
+    }
+
+    // Move legs along z-axis based on speed of stepping 
+    // and check for collision against extremes
+    speedZ = (stepRate*velocity);
+    z += speedZ;
+    if (z > 400) {
+      z = 400;
+      velocity *= -1;
+    }
+    if (z < -100) {
+      z = -100;
+      velocity *= -1;
+    }
+  }
+  
+  void setDynamics(float speedX, float spring, float damping) {
+    this.speedX = speedX;
+    this.spring = spring;
+    this.damping = damping;
+  }
+}
+
+
+
+
+
+
+
+
+
+
+
+

java/examples/OpenGL/Form/RunAmuck/RunAmuck.pde

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+/**
+ * Run-Amuck
+ * By Ira Greenberg <br />
+ * Processing for Flash Developers,
+ * Friends of ED, 2009
+ */
+
+int count = 250;
+Legs[] legs = new Legs[count];
+
+void setup() {
+  size(640, 360, P3D);
+  noStroke();
+  for (int i = 0; i < legs.length; i++) {
+    legs[i] = new Legs(random(-10, 10), random(-50, 150), random(.5, 5), 
+                       random(.5, 5), color(random(255), random(255), random(255)));
+  }
+}
+
+void draw() {
+  background(0);
+  translate(width/2, height/2);
+  noStroke();
+  fill(35);
+
+  // Draw ground plane
+  beginShape();
+  vertex(-width*2, 0, -1000);
+  vertex(width*2, 0, -1000);
+  vertex(width/2, height/2, 400);
+  vertex(-width/2, height/2, 400);
+  endShape(CLOSE);
+
+  // Update and draw the legs
+  for (int i = 0; i < legs.length; i++) {
+    legs[i].create();
+    // Set foot step rate
+    legs[i].step(random(10, 50));
+    // Move legs along x, y, z axes
+    // z-movement dependent upon step rate
+    legs[i].move();
+  }
+}
+
+