INITIAL COMMIT

2026-06-03 00:51:18 +01:00
commit 7f46c85194
76 changed files with 4845 additions and 0 deletions
@@ -0,0 +1,62 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#ifndef PROP_TABLE_H
+#define PROP_TABLE_H
+
+#include "entity_id.h"
+#include "wapp/wapp.h"
+
+template<typename T>
+struct PropTable {
+	PropTable(const Allocator *allocator, u64 capacity) {
+		index  = wapp_array_alloc_capacity(i32, allocator, capacity, ARRAY_INIT_FILLED);
+		values = wapp_array_alloc_capacity(T, allocator, capacity, ARRAY_INIT_NONE);
+
+		for (u64 i = 0; i < wapp_array_count(index); ++i) {
+			index[i] = -1;
+		}
+	}
+
+	void add_prop(EntityID id, T prop) {
+		if (IS_INVALID_ID(id)) { return; }
+
+		i32 idx = (i32)wapp_array_count(values);
+		wapp_array_set(i32, index, id.index, &idx);
+		wapp_array_append_capped(T, values, &prop);
+	}
+
+	void remove_prop(EntityID id) {
+		if (IS_INVALID_ID(id) || *wapp_array_get(i32, index, id.index) == -1) { return; }
+
+		// Get indices for swapping
+		i32 idx1 = *wapp_array_get(i32, index, id.index);
+		i32 idx2 = ((i32)wapp_array_count(values)) - 1;
+
+		// Swap values
+		values[idx1] = values[idx2];
+		wapp_array_pop(T, values);
+
+		// Update index
+		index[id.index] = -1;
+
+		i64 entity_index = -1;
+		for (u64 i = 0; i < wapp_array_count(index); ++i) {
+			if (index[i] == idx2) {
+				entity_index = (i64)i;
+				break;
+			}
+		}
+
+		if (entity_index != -1) {
+			index[entity_index] = idx1;
+		}
+	}
+
+	// private:
+		typedef T *TArray;
+
+		I32Array index;
+		TArray values;
+};
+
+#endif // !PROP_TABLE_H