Basic ECS

src/dusk/entity/component.h

@@ -0,0 +1,79 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entitybase.h"
+
+#define X(enumName, type, field, init, dispose) \
+  // do nothing
+#include "componentlist.h"
+#undef X
+
+typedef union {
+  #define X(enumName, type, field, init, dispose) type field;
+  #include "componentlist.h"
+  #undef X
+} componentdata_t;
+
+typedef struct {
+  void (*init)(const entityid_t, const componentid_t);
+  void (*dispose)(const entityid_t, const componentid_t);
+} componentdefinition_t;
+
+typedef enum {
+  COMPONENT_TYPE_NULL,
+
+  #define X(enumName, type, field, init, dispose) \
+    COMPONENT_TYPE_##enumName,
+  #include "componentlist.h"
+  #undef X
+
+  COMPONENT_TYPE_COUNT
+} componenttype_t;
+
+typedef struct {
+  componenttype_t type;
+  componentdata_t data;
+} component_t;
+
+extern componentdefinition_t COMPONENT_DEFINITIONS[];
+
+/**
+ * Initializes a component of the given type for the entity with component ID.
+ * 
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param type The type of the component to initialize.
+ */
+void componentInit(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const componenttype_t type
+);
+
+/**
+ * Gets the pointer to the data of a component for the entity with component ID.
+ * 
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return A pointer to the component data.
+ */
+void * componentGetData(
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Disposes of a component for the entity with component ID.
+ * 
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void componentDispose(
+  const entityid_t entityId,
+  const componentid_t componentId
+);