determine branch angle range before randomizing

baumgen.js

@@ -30,37 +30,32 @@ function gen_tree(pos) {
     baum.angle = Math.PI / 2; // + Math.random() * 0.2 - 0.1;
 
     if((baum.crown.shape != "triangle") && (Math.random() < 0.5)) {
-        var crown = baum.crown.clone();
-        crown.length *= 0.4;
         var b = {
             length: baum.length * 0.4,
-            angle: Math.PI / 5 + Math.random() * 0.45,
-            crown: crown
+            angle: Math.PI / 2,
+            crown: baum.crown.clone()
         };
+        b.crown.length *= 0.4;
         baum.forks = [{
             pos: 0.2 + Math.random() * 0.4,
             branch: new Branch(b),
         }];
 
         baum.draw(pos);
-        var rectified = false;
-        var i=0;
+        var step = (Math.random() < 0.5) ? -0.1 : 0.1;
         while(baum.collides_crown(baum.forks[0].branch)) {
-            baum.forks[0].branch.angle -= 0.01;
+            baum.forks[0].branch.angle += step;
             baum.draw(pos);
-            rectified = true;
-            i += 1;
-            if(i>50) {
-                var c = new Path.Circle({center:pos, radius: 2, strokeWidt: 1, strokeColor: '#ff0000'});
-                //break;
-            }
         }
 
-        if(rectified) {
-            baum.forks[0].branch.angle -= Math.random() * 0.1;
-                var c = new Path.Circle({center:pos, radius: 2, strokeWidt: 1, strokeColor: '#ff0000'});
-            baum.draw(pos);
+        var range = 4*Math.PI/9 - Math.abs(Math.PI/2 - baum.forks[0].branch.angle);
+        if(step > 0) {
+            baum.forks[0].branch.angle += range * (0.1 + 0.9 * Math.random());
+        } else {
+            baum.forks[0].branch.angle -= range * (0.1 + 0.9 * Math.random());
         }
+        baum.draw(pos);
+
     }
 
     baum.draw(pos);