aa

examples/square/config.ceg

@@ -0,0 +1,30 @@
+{
+    "window": {
+        "width": 800,
+        "height": 600,
+        "title": "OpenCGE - Square Example"
+    },
+
+    "input": [
+        { "action": "quit", "keys": ["Escape"] },
+        { "action": "reset", "mouse_buttons": ["Left"] },
+        { "action": "move_left", "keys": ["Left"] },
+        { "action": "move_right", "keys": ["Right"] },
+        { "action": "move_up", "keys": ["Up"] },
+        { "action": "move_down", "keys": ["Down"] }
+    ],
+
+    "actors": [
+        {
+            "name": "square",
+            "init": "square_init",
+            "tick": "square_tick",
+            "position": { "x": 0, "y": 0 },
+            "facing": { "x": 1, "y": 0 },
+            "mesh": {
+                "shape": "quad",
+                "color": { "r": 0.2, "g": 0.8, "b": 0.9, "a": 1.0 }
+            }
+        }
+    ]
+}

examples/square/main.cpp

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+#include <cmath>
+
+#include <openceg.hpp>
+
+namespace {
+
+void register_square_behaviors() {
+    auto& behaviors = openceg::BehaviorRegistry::getInstance();
+
+    behaviors.register_init("square_init", [](openceg::Actor& actor) {
+        actor.set_position({0.0F, 0.0F});
+        actor.set_facing({1.0F, 0.0F});
+        if (actor.mesh() != nullptr) {
+            actor.mesh()->set_color({0.2F, 0.8F, 0.9F, 1.0F});
+        }
+    });
+
+    behaviors.register_tick(
+        "square_tick",
+        [](openceg::Actor& actor, float dt, const openceg::render::InputMap& input) {
+            const float t = actor.age();
+            actor.set_facing({
+                std::cos(t * 1.5F),
+                std::sin(t * 1.5F),
+            });
+
+            if (actor.mesh() != nullptr) {
+                actor.mesh()->set_color({
+                    0.5F + 0.5F * std::sin(t * 2.0F),
+                    0.5F + 0.5F * std::sin(t * 2.0F + 2.094F),
+                    0.5F + 0.5F * std::sin(t * 2.0F + 4.189F),
+                    1.0F,
+                });
+            }
+
+            auto position = actor.position();
+            const float move_speed = 0.7F;
+            position[0] += input.get_axis("move_left", "move_right") * move_speed * dt;
+            position[1] += input.get_axis("move_up", "move_down") * move_speed * dt;
+            actor.set_position(position);
+        });
+}
+
+}  // namespace
+
+int main(int argc, char** argv) {
+    register_square_behaviors();
+    return openceg::run_engine(argc, argv, "examples/square/config.ceg");
+}