add support for non-deterministic rules

lindenmayer-system/lindenmeyer-system.html

@@ -195,11 +195,8 @@ function sierpinski() {
      var r = generate(
          'iIjJX',
          [
-             ['X', 'F[-lfX][cfX][+rfX]'],
-             //['F'.split(''), 'FF'.split('')],
-             //['L'.split(''), 'LL'.split('')],
-             //['C'.split(''), 'CC'.split('')],
-             //['R'.split(''), 'RR'.split('')],
+             //['X', 'F[-lfX][.cfX][+rfX]'],
+             ['X', ['F[-lfX][.cfX][+rfX]', 'F[-lfX]m[.cfX][+rfX]']],
          ],
          8
      );
@@ -210,6 +207,7 @@ function sierpinski() {
          {
              'F': draw_forward(),
              'f': draw_forward(0.5),
+             'm': draw_forward(0.5),
 
              'l': draw_stepsize_mul(0.7),
              'c': draw_stepsize_mul(0.8),
@@ -220,9 +218,9 @@ function sierpinski() {
              'j': draw_set_turn_noise(1),
              'J': draw_set_length_noise(1),
 
-             '*': draw_angle_add((Math.random() - 0.5) * 0.01),
              '-': draw_angle_turn(-1),
              '+': draw_angle_turn(1),
+             '.': draw_angle_turn(0.1),
              '[': draw_state_push(),
              ']': draw_state_pop(),
          }

lindenmayer-system/lindenmeyer-system.js

@@ -25,7 +25,11 @@ function generate(start, rules, iterations) {
                 var ruleres;
                 if(typeof rule[1] == 'function') {
                     ruleres = rule[1]();
-                } else {
+                } else if(typeof rule[1] == 'object') {
+                    var r = Math.floor(Math.random() * rule[1].length);
+                    console.log(r);
+                    ruleres = rule[1][r];
+                }else {
                     ruleres = rule[1];
                 }
                 newword += ruleres;