add line pattern

baumgen.js

@@ -92,7 +92,7 @@ class Pattern {
 class MiniLinePattern extends Pattern {
     constructor({tasize=7, grid=17, hat=true}={})
     {
-        super('hat')
+        super('miniline')
         this.tasize = tasize;
         this.grid = grid;
         this.hat = hat;
@@ -121,7 +121,7 @@ class MiniLinePattern extends Pattern {
 class RandomCirclePattern extends Pattern {
     constructor({radius=3, grid=15}={})
     {
-        super('hat')
+        super('randomcircle')
         this.radius = radius;
         this.grid = grid;
         this._intersect_trace = true;
@@ -145,6 +145,35 @@ class RandomCirclePattern extends Pattern {
 }
 
 
+class LinePattern extends Pattern {
+    constructor({grid=5, angle=Math.random()*2*Math.PI}={})
+    {
+        super('line')
+        this.grid = grid;
+        this.angle = angle;
+        this._intersect_trace = false;
+    }
+
+    generate(bounds) {
+        var ret = [];
+        var r = Math.random() * 360;
+        for(var x=0; x<bounds.width * 3; x += this.grid) {
+            var p = new Path();
+            p.add(new Point(bounds.x - bounds.width + x,
+                            bounds.y - bounds.height));
+            p.add(new Point(bounds.x - bounds.width + x,
+                            bounds.y + bounds.height * 2));
+            p.rotate(this.angle * 360 / (2*Math.PI),
+                     new Point(bounds.x + bounds.width * 0.5,
+                               bounds.y + bounds.height * 0.5));
+            ret.push(p);
+        }
+        return ret;
+    }
+}
+
+
+
 
 class Crown {
     constructor(length, width, shape) {
@@ -368,7 +397,7 @@ function draw() {
             }
 
             var ptrn = null;
-            var ptrnrand = Math.random() * 5;
+            var ptrnrand = Math.random() * 6;
             if(ptrnrand < 1) {
                 ptrn = new MiniLinePattern();
             } else if(ptrnrand < 2) {
@@ -377,6 +406,8 @@ function draw() {
                 ptrn = new RandomCirclePattern();
             } else if(ptrnrand < 4) {
                 ptrn = new RandomCirclePattern({radius: 1});
+            } else if(ptrnrand < 5) {
+                ptrn = new LinePattern({grid: 5 + Math.random() * 3});
             }
             if(ptrn != null) {
                 ptrn.apply(t);