Only create RANDOM_SEED and NOISE_SEED when global_seed is True

Check for the existence (and truthness) of `global_seed` inside the
`sketch/data.yaml` configuration file.

This will only add the `newRandomSeeds()` function if sketch is
globally-seeded

ginpar/build.py

@@ -308,8 +308,7 @@ def render_sketch_page(build_path, sketch, site, page_template, input_templates)
 
     ## Copy all the content from original sketches/{title}.js to sketch.js
     sf = open(sketch["script"], "r")
-
-    sketch_script.write(gg.makeValueGetter(list(params)))
+    sketch_script.write(gg.makeValueGetter(("global_seed" in sketch["data"] and sketch["data"]["global_seed"]), list(params)))
     for x in sf.readlines():
         sketch_script.write(x)
     sf.close()

ginpar/generators.py

@@ -35,10 +35,9 @@ def dict_to_attrs(d):
 _jinja_env.filters["getattrs"] = dict_to_attrs
 
 
-def makeValueGetter(attrs):
+def makeValueGetter(global_seed, attrs):
     _TEMPLATE = _jinja_env.get_template("retrieve.js")
-
-    return _TEMPLATE.render(params=attrs)
+    return _TEMPLATE.render(global_seed = global_seed, params=attrs)
 
 
 def sketch_to_dict(s):

ginpar/templates/retrieve.js

@@ -1,7 +1,10 @@
+{% if global_seed -%}
 function newRandomSeeds(){
-    RANDOM_S = Math.random() * 100000000
-    NOISE_S = Math.random() * 10000000
+    RANDOM_SEED = Math.random() * 100000000
+    NOISE_SEED = Math.random() * 100000000
 }
+{%- endif %}
+
 
 function resetDraw(){
     updateVars(); setup(); draw();