big refactor

external/engine/physics.h

@@ -0,0 +1,41 @@
+#ifndef PHYSICS_H
+#define PHYSICS_H
+
+#include <raymath.h>
+
+typedef struct
+{
+    Vector2 position;
+    Vector2 direction;
+    Vector2 velocity;
+    float speed;
+} Physics;
+
+void UpdatePhysicsDirection(Vector2 *direction, Vector2 vector)
+{
+    *direction = Vector2Normalize(vector);
+}
+
+void UpdatePhysicsVelocity(Vector2 *velocity, Vector2 *direction, float *speed)
+{
+    *velocity = Vector2Scale(*direction, *speed * GetFrameTime());
+}
+
+void UpdatePhysicsPosition(Vector2 *position, Vector2 *velocity)
+{
+    *position = Vector2Add(*position, *velocity);
+}
+
+void UpdatePhysicsSpeed(float *speed, float *newSpeed)
+{
+    *speed = *newSpeed;
+}
+
+void UpdatePhysics(Physics *physics, Vector2 direction)
+{
+    UpdatePhysicsDirection(&physics->direction, direction);
+    UpdatePhysicsVelocity(&physics->velocity, &physics->direction, &physics->speed);
+    UpdatePhysicsPosition(&physics->position, &physics->velocity);
+}
+
+#endif // PHYSICS_H