Starting on entity system...HEADmaster

1 files changed, 46 insertions, 0 deletions

diff --git a/include/entity/Entity.hpp b/include/entity/Entity.hpp
new file mode 100644
index 0000000..853da3a
--- /dev/null
+++ b/include/entity/Entity.hpp
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "MeshInstance.hpp"
+#include "../types.hpp"
+
+#include <glm/gtc/type_ptr.hpp>
+
+namespace amalgine {
+    const int NUM_ENTITIES = 1024; // Should always be a power a multiple of 16, to utilize compiler auto-vectorization
+
+    using Entity = int;
+    const Entity INVALID_ENTITY = -1;
+
+    using EntityMaskType = u64;
+    enum EntityMask : EntityMaskType {
+        ENTITY_MASK_NONE                = 0,
+        ENTITY_MASK_TRANSFORMATION      = 1 << 0,
+        ENTITY_MASK_VELOCITY            = 1 << 1,
+        ENTITY_MASK_MESH_COMPONENT      = 1 << 2
+    };
+
+    class EntityWorld {
+    public:
+        EntityWorld();
+
+        // Returns @INVALID_ENTITY on failure
+        // O(n)
+        Entity create_entity(EntityMask type);
+        // O(1)
+        void remove_entity(Entity entity);
+
+        glm::mat4& get_transformation(Entity entity);
+        glm::vec3& get_velocity(Entity entity);
+        MeshInstance& get_mesh_instance(Entity entity);
+
+
+        void update();
+    private:
+        EntityMask mask[NUM_ENTITIES];
+
+        // Components
+        glm::mat4 transformation[NUM_ENTITIES];
+        glm::vec3 velocity[NUM_ENTITIES];
+        MeshInstance mesh_instance[NUM_ENTITIES];
+    };
+}
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