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core.cm

@@ -78,7 +78,29 @@ core.backend = function() {
 }
 // FPS tracking
 var _fps_samples = []
-var _fps_sample_count = 60
+var _fps_sample_count = 120
+var _fps_sample_sum = 0
+var _fps_sample_pos = 0
+
+function fps_add_sample(sample) {
+  var n = length(_fps_samples)
+  if (n < _fps_sample_count) {
+    push(_fps_samples, sample)
+    _fps_sample_sum += sample
+  } else {
+    var old = _fps_samples[_fps_sample_pos]
+    _fps_samples[_fps_sample_pos] = sample
+    _fps_sample_sum += sample - old
+    _fps_sample_pos++
+    if (_fps_sample_pos >= _fps_sample_count) _fps_sample_pos = 0
+  }
+}
+
+function fps_get_avg() {
+  var n = length(_fps_samples)
+  return n ? _fps_sample_sum / n : 0
+}
+
 var _current_fps = 0
 var _frame_time_ms = 0
 
@@ -162,7 +184,7 @@ function _main_loop() {
       // Handle both compositor result ({commands: [...]}) and fx_graph (graph object)
       if (render_result.commands) {
         if (_config.imgui || _config.editor) {
-          render_result.commands.push({
+          push(render_result.commands, {
             cmd: 'imgui',
             draw: function(ui) {
               if (_config.imgui) _config.imgui(ui)
@@ -188,19 +210,15 @@ function _main_loop() {
     }
   }
   
-  // Measure actual frame work time (excluding delay)
   var frame_end = time_mod.number()
   var actual_frame_time = frame_end - frame_start
-  
-  // Track FPS based on actual work time
+
   _frame_time_ms = actual_frame_time * 1000
-  _fps_samples.push(actual_frame_time)
-  if (length(_fps_samples) > _fps_sample_count) {
-    _fps_samples.shift()
-  }
-  var avg_frame_time = reduce(_fps_samples, function(a,b) { return a+b }) / length(_fps_samples)
+  fps_add_sample(actual_frame_time)
+
+  var avg_frame_time = fps_get_avg()
   _current_fps = avg_frame_time > 0 ? 1 / avg_frame_time : 0
-  
+
   // Schedule next frame
   var frame_time = 1 / _framerate
   var elapsed = frame_end - frame_start