Working reusable simulation loop

1 files changed, 29 insertions, 0 deletions

diff --git a/frontend/shared_cpp/MainLoop.h b/frontend/shared_cpp/MainLoop.h
new file mode 100644
index 0000000..7300f6b
--- /dev/null
+++ b/frontend/shared_cpp/MainLoop.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <emscripten.h>
+#include <emscripten/html5.h>
+#include <GLES2/gl2.h>
+#include <EGL/egl.h>
+
+EM_BOOL loop(double time, void* loop);
+
+struct MainLoop {
+    bool isRunning = false;
+	double lastTime = 0, elapsedTime = 0;
+	int numFrames = 0;
+	EM_BOOL (*updateFunc)(float dtSeconds, void *userData);
+
+    void run(EM_BOOL (*cb)(float dtSeconds, void *userData)) {
+		isRunning = true;
+		lastTime = 0;
+		elapsedTime = 0;
+		numFrames = 0;
+		updateFunc = cb;
+
+		emscripten_request_animation_frame_loop(loop, this);
+	}
+
+    void stop() {
+        isRunning = false;
+    }
+};
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