Properly link flecs library

engine/libs/flecs/examples/cpp/systems/time_interval/include/time_interval.h

@@ -0,0 +1,16 @@
+#ifndef TIME_INTERVAL_H
+#define TIME_INTERVAL_H
+
+/* This generated file contains includes for project dependencies */
+#include "time_interval/bake_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+

engine/libs/flecs/examples/cpp/systems/time_interval/include/time_interval/bake_config.h

@@ -0,0 +1,24 @@
+/*
+                                   )
+                                  (.)
+                                  .|.
+                                  | |
+                              _.--| |--._
+                           .-';  ;`-'& ; `&.
+                          \   &  ;    &   &_/
+                           |"""---...---"""|
+                           \ | | | | | | | /
+                            `---.|.|.|.---'
+
+ * This file is generated by bake.lang.c for your convenience. Headers of
+ * dependencies will automatically show up in this file. Include bake_config.h
+ * in your main project file. Do not edit! */
+
+#ifndef TIME_INTERVAL_BAKE_CONFIG_H
+#define TIME_INTERVAL_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include <flecs.h>
+
+#endif
+

engine/libs/flecs/examples/cpp/systems/time_interval/project.json

@@ -0,0 +1,11 @@
+{
+    "id": "time_interval",
+    "type": "application",
+    "value": {
+        "use": [
+            "flecs"
+        ],
+        "public": false,
+        "language": "c++"
+    }
+}

engine/libs/flecs/examples/cpp/systems/time_interval/src/main.cpp

@@ -0,0 +1,38 @@
+#include <time_interval.h>
+#include <iostream>
+
+// This example shows how to run a system at a specified time interval.
+
+void Tick(flecs::iter& it) {
+    std::cout << it.system().name() << "\n";
+}
+
+int main(int, char *[]) {
+    flecs::world ecs;
+
+    ecs.system("Tick")
+        .interval(1.0) // time in seconds
+        .iter(Tick);
+
+    ecs.system("FastTick")
+        .interval(0.5)
+        .iter(Tick);
+
+    // Run the main loop at 60 FPS
+    ecs.set_target_fps(60);
+
+    while (ecs.progress()) { }
+
+    // Output
+    //  FastTick
+    //  Tick
+    //  FastTick
+    //  FastTick
+    //  Tick
+    //  FastTick
+    //  FastTick
+    //  Tick
+    //  FastTick
+    //  FastTick
+    //  ...
+}