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-rw-r--r--js/shader.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/js/shader.js b/js/shader.js
index 2f5fda1..19c049b 100644
--- a/js/shader.js
+++ b/js/shader.js
@@ -1,6 +1,6 @@
var shader_build = function(){
var fn_str = document.getElementById('shader').value
- if (!fn_str.length) return
+ if (!fn_str.length) fn_str = ""
try {
var fn = new Function('x','y','t','d', fn_str)
shader = fn