fix syntax

fx_graph.cm

@@ -60,11 +60,11 @@
 var fx_graph = {}
 
 fx_graph.add_node = function(type, params) {
-  params = params || {}
+  var local_params = params || {}
   var node = {
     id: this.next_id++,
     type: type,
-    params: params,
+    params: local_params,
     output: {node_id: this.next_id - 1, slot: 'output'}
   }
   push(this.nodes, node)
@@ -137,7 +137,7 @@ NODE_EXECUTORS.render_view = function(params, backend) {
   var renderer = params.renderer
   
   // Determine target
-  var target
+  var target = null
   if (target_spec == 'screen') {
     target = 'screen'
   } else if (target_spec && target_spec.texture) {
@@ -257,17 +257,18 @@ NODE_EXECUTORS.clip_rect = function(params, backend) {
   
   // Insert scissor after begin_render
   var insert_idx = 0
-  for (var i = 0; i < length(commands); i++) {
+  var i = 0
+  for (i = 0; i < length(commands); i++) {
     if (commands[i].cmd == 'begin_render') {
       insert_idx = i + 1
       break
     }
   }
-  
+
   commands = array(array(array(commands, 0, insert_idx), [{cmd: 'scissor', rect: rect}]), array(commands, insert_idx))
-  
+
   // Add scissor reset before end_render
-  for (var i = length(commands) - 1; i >= 0; i--) {
+  for (i = length(commands) - 1; i >= 0; i--) {
     if (commands[i].cmd == 'end_render') {
       commands = array(array(array(commands, 0, i), [{cmd: 'scissor', rect:null}]) ,array(commands, i+1))
       break
@@ -287,7 +288,8 @@ NODE_EXECUTORS.blit = function(params, backend) {
   var src_target = input && input.target ? input.target : input
   if (!src_target) return {target: null, commands: []}
   
-  var target
+  var target = null
+  var key = null
   if (target_spec == 'screen') {
     target = 'screen'
   } else if (target_spec && target_spec.target) {
@@ -298,7 +300,7 @@ NODE_EXECUTORS.blit = function(params, backend) {
     target = target_spec
   } else if (target_spec && target_spec.width) {
     // Target spec - use a consistent key based on the spec itself
-    var key = `blit_${target_spec.width}x${target_spec.height}`
+    key = `blit_${target_spec.width}x${target_spec.height}`
     target = backend.get_or_create_target(target_spec.width, target_spec.height, key)
   } else {
     return {target: null, commands: []}
@@ -336,16 +338,18 @@ NODE_EXECUTORS.shader_pass = function(params, backend) {
   if (!input || !input.target) return {target: null, commands: []}
   
   var src = input.target
-  var target
-  
+  var target = null
+  var w = 0
+  var h = 0
+
   if (output_spec == 'screen') {
     target = 'screen'
   } else if (output_spec && output_spec.texture) {
     target = output_spec
   } else {
     // Default to input size if not specified
-    var w = output_spec && output_spec.width ? output_spec.width : src.width
-    var h = output_spec && output_spec.height ? output_spec.height : src.height
+    w = output_spec && output_spec.width ? output_spec.width : src.width
+    h = output_spec && output_spec.height ? output_spec.height : src.height
     target = backend.get_or_create_target(w, h, 'shader_' + shader + '_' + params._node_id)
   }