Merge branch 'master' into niels/remove_singleton

1 files changed, 81 insertions, 0 deletions

diff --git a/src/crepe/system/AISystem.h b/src/crepe/system/AISystem.h
new file mode 100644
index 0000000..d5f8a8e
--- /dev/null
+++ b/src/crepe/system/AISystem.h
@@ -0,0 +1,81 @@
+#pragma once
+
+#include "api/AI.h"
+#include "api/Rigidbody.h"
+
+#include "System.h"
+#include "api/Transform.h"
+#include "types.h"
+
+namespace crepe {
+
+/**
+ * \brief The AISystem is used to control the movement of entities using AI.
+ *
+ * The AISystem is used to control the movement of entities using AI. The AISystem can be used to
+ * implement different behaviors such as seeking, fleeing, arriving, and path following.
+ */
+class AISystem : public System {
+public:
+	using System::System;
+
+	//! Update the AI system
+	void update() override;
+
+private:
+	/**
+	 * \brief Calculate the total force to apply to the entity
+	 *
+	 * \param ai The AI component
+	 * \param rigidbody The Rigidbody component
+	 */
+	vec2 calculate(AI & ai, const Rigidbody & rigidbody);
+	/**
+	 * \brief Accumulate the force to apply to the entity
+	 *
+	 * \param ai The AI component
+	 * \param running_total The running total of the force
+	 * \param force_to_add The force to add
+	 * \return true if the force was added, false otherwise
+	 */
+	bool accumulate_force(const AI & ai, vec2 & running_total, vec2 & force_to_add);
+
+	/**
+	 * \brief Calculate the seek force
+	 *
+	 * \param ai The AI component
+	 * \param rigidbody The Rigidbody component
+	 * \param transform The Transform component
+	 * \return The seek force
+	 */
+	vec2 seek(const AI & ai, const Rigidbody & rigidbody, const Transform & transform) const;
+	/**
+	 * \brief Calculate the flee force
+	 *
+	 * \param ai The AI component
+	 * \param rigidbody The Rigidbody component
+	 * \param transform The Transform component
+	 * \return The flee force
+	 */
+	vec2 flee(const AI & ai, const Rigidbody & rigidbody, const Transform & transform) const;
+	/**
+	 * \brief Calculate the arrive force
+	 *
+	 * \param ai The AI component
+	 * \param rigidbody The Rigidbody component
+	 * \param transform The Transform component
+	 * \return The arrive force
+	 */
+	vec2 arrive(const AI & ai, const Rigidbody & rigidbody, const Transform & transform) const;
+	/**
+	 * \brief Calculate the path follow force
+	 *
+	 * \param ai The AI component
+	 * \param rigidbody The Rigidbody component
+	 * \param transform The Transform component
+	 * \return The path follow force
+	 */
+	vec2 path_follow(AI & ai, const Rigidbody & rigidbody, const Transform & transform);
+};
+
+} // namespace crepe