wip: i might be getting there

ring/ring.pde

@@ -1,31 +1,75 @@
+import peasy.PeasyCam;
+
 class Leaf {
   PVector pos;
+  boolean reached = false;
 
-  Leaf() {
-    pos = PVector.random2D();
+   Leaf(PVector pos) {
+    this.pos = pos;
+   }
+  
+  void show() {
+    fill(0);
+    noStroke();
+    pushMatrix();
+    translate(pos.x, pos.y, pos.z);
+    sphere(1);
+    popMatrix();
+  }
+  
+  void reached() {
+    reached = true;
   }
 }
 
 class Branch {
   PVector pos;
+  Branch parent;
+  PVector dir;
+  PVector origDir;
+  int count;
+  int len = 5;
   
-  Branch(PVector pos) {
-    this.pos = pos;
+  Branch(PVector v, PVector d) {
+    parent = null;
+    pos = v.copy();
+    dir = d.copy();
+    origDir = dir.copy();
   }
 
-  Branch(Branch b) {
-     this.pos = b.pos;
+  Branch(Branch p) {
+    parent = p;
+    pos = parent.next();
+    dir = parent.dir.copy();
+    origDir = dir.copy();
+  }
+  
+  boolean isParent(Branch b, int depth) {
+    if (this.equals(b)) return true;
+    if (depth == 1 ||parent == null) return false;
+    return parent.isParent(b, depth--);
+  }
+
+  void reset() {
+    count = 0;
+    dir = origDir.copy();
+  }
+
+  PVector next() {
+    PVector v = PVector.mult(dir, len);
+    PVector next = PVector.add(pos, v);
+    return next;
   }
 }
 
 class Tree {
-  ArrayList<Branch> branches = new ArrayList<>();
-  ArrayList<Leaf> leaves = new ArrayList<>();
+  ArrayList<Branch> branches = new ArrayList<Branch>();
+  ArrayList<Leaf> leaves = new ArrayList<Leaf>();
 
   Tree() {
-    for (int i = 0; i < 2000; i++) leaves.add(new Leaf());
+    makeTorus();
 
-    Branch root = new Branch(new PVector(width/2, height/2));
+    Branch root = new Branch(new PVector(300, 0), new PVector(0, -1));
     branches.add(root);
     Branch current = new Branch(root);
 
@@ -36,6 +80,17 @@ class Tree {
     }
   }
   
+  void makeTorus() {
+    for (int i = 0; i < 200; i++) {
+      for (int p = 0; p < 90; p++) {
+        PVector pos = PVector.random3D();
+        pos.mult(90);
+        pos.add(sin(i)*300, cos(i)*300);
+        leaves.add(new Leaf(pos));
+      }
+    }
+  }
+
   boolean closeEnough(Branch b) {
     for (Leaf l : leaves) {
       float d = PVector.dist(b.pos, l.pos);
@@ -45,9 +100,19 @@ class Tree {
   }
 
   void show() {
+    //for (Leaf l : leaves) l.show();
+    for (int i = 0; i < branches.size(); i++) {
+      Branch b = branches.get(i);
+      if (b.parent != null) {
+        strokeWeight(2);
+        stroke(0);
+        line(b.pos.x, b.pos.y, b.pos.z, b.parent.pos.x, b.parent.pos.y, b.parent.pos.z);
+      }
+    }
   }
 
   void grow() {
+    for (Leaf l : leaves) {
       Branch closest = null;
       PVector closestDir = null;
       float record = -1;
@@ -59,28 +124,89 @@ class Tree {
           l.reached();
           closest = null;
           break;
-      } else if (closest == null && d <= max_dist) {
+        } else if (d > max_dist) {
+        } else if (closest == null || d < record) {
           closest = b;
           closestDir = dir;
           record = d;
         }
       }
+      if (closest != null && closestDir != null) {
+        closestDir.normalize();
+        closest.dir.add(closestDir);
+        closest.count++;
+      }
+    }
+
+    for (int i = leaves.size()-1; i >= 0; i--) {
+      if (leaves.get(i).reached) {
+        leaves.remove(i);
+      }
+    }
+
+    for (int i = branches.size()-1; i >= 0; i--) {
+      Branch b = branches.get(i);
+      if (b.count > 0) {
+        b.dir.div(b.count);
+        PVector rand = PVector.random2D();
+        rand.setMag(0.3);
+        b.dir.add(rand);
+        b.dir.normalize();
+        Branch newB = new Branch(b);
+        branches.add(newB);
+        b.reset();
+      }
+    }
+  }
+  
+  void fuse() {
+    ArrayList<Branch> nonparents = new ArrayList<Branch>();
+    for (Branch b : branches) {
+      boolean isnonparent = true;
+      for (Branch ib : branches) {
+        if (ib.parent != null && ib.parent.equals(b)) { isnonparent = false; break; }
+      }
+      if (isnonparent) nonparents.add(b);
+    }
+    for (Branch b : nonparents) {
+      Branch closest = null;
+      float record = -1;
+      for (Branch ib : nonparents) {
+        if (ib.equals(b)) continue;
+        PVector dir = PVector.sub(ib.pos, b.pos);
+        float d = dir.mag();
+        if (closest == null || d < record) {
+          closest = ib;
+          record = d;
+        }
+      }
+      if (closest != null) {
+        Branch n = new Branch(b);
+        n.pos = closest.pos.copy();
+        branches.add(n);
+      }
+    }
   }
 }
 
 Tree tree;
 
 float min_dist = 5;
-float max_dist = 50;
+float max_dist = 20;
+boolean fused = false;
+
+PeasyCam cam;
 
 void setup() {
-  size(600, 600);
-  frameRate(5);
+  size(600, 600, P3D);
+  cam = new PeasyCam(this, 500);
   tree = new Tree();
 }
 
 void draw() {
-   background(40);
+  background(255);
+  stroke(0);
   tree.show();
-   tree.grow();
+  if (tree.leaves.size() > 10) tree.grow();
+  else if (!fused) { tree.fuse(); fused = true; }
 }