more pattern types

baumgen.js

@@ -75,7 +75,7 @@ class Pattern {
     apply(branch) {
         var crownpath = branch.crown._path;
         for (let p of this.generate(crownpath.bounds)) {
-            var pp = p.intersect(crownpath, {trace: false});
+            var pp = p.intersect(crownpath, {trace: this._intersect_trace});
             pp.strokeWidth = 1.5;
             pp.strokeColor = 'black';
         }
@@ -89,12 +89,14 @@ class Pattern {
 }
 
 
-class HatPattern extends Pattern {
+class MiniLinePattern extends Pattern {
-    constructor({tasize=7, grid=17}={})
+    constructor({tasize=7, grid=17, hat=true}={})
     {
         super('hat')
         this.tasize = tasize;
         this.grid = grid;
+        this.hat = hat;
+        this._intersect_trace = false;
     }
 
     generate(bounds) {
@@ -105,7 +107,9 @@ class HatPattern extends Pattern {
                 var yy = bounds.y + y*this.grid;
                 var p = new Path();
                 p.add(new Point(xx, yy+this.tasize));
+                if(this.hat) {
                     p.add(new Point(xx + this.tasize/2, yy));
+                }
                 p.add(new Point(xx + this.tasize, yy+this.tasize));
                 ret.push(p);
             }
@@ -114,6 +118,33 @@ class HatPattern extends Pattern {
     }
 }
 
+class RandomCirclePattern extends Pattern {
+    constructor({radius=3, grid=15}={})
+    {
+        super('hat')
+        this.radius = radius;
+        this.grid = grid;
+        this._intersect_trace = true;
+    }
+
+    generate(bounds) {
+        var ret = [];
+        for(var y=0; y<bounds.height / this.grid; y++) {
+            for(var x=0; x<bounds.width / this.grid; x++) {
+                var xx = bounds.x + x*this.grid + Math.random() * this.grid/2;
+                var yy = bounds.y + y*this.grid + Math.random() * this.grid/2;
+                var p = new Path.Circle({
+                    center: new Point(xx, yy),
+                    radius: this.radius
+                });
+                ret.push(p);
+            }
+        }
+        return ret;
+    }
+}
+
+
 
 class Crown {
     constructor(length, width, shape) {
@@ -336,8 +367,20 @@ function draw() {
                 }
             }
 
-            var ptrn = new HatPattern();
+            var ptrn = null;
+            var ptrnrand = Math.random() * 5;
+            if(ptrnrand < 1) {
+                ptrn = new MiniLinePattern();
+            } else if(ptrnrand < 2) {
+                ptrn = new MiniLinePattern({hat: false});
+            } else if(ptrnrand < 3) {
+                ptrn = new RandomCirclePattern();
+            } else if(ptrnrand < 4) {
+                ptrn = new RandomCirclePattern({radius: 1});
+            }
+            if(ptrn != null) {
                 ptrn.apply(t);
+            }
 
             prev = t;
         }