PhysicsSolver minor refactor, changed crouch speed

src/physics/PhysicsSolver.h

@@ -2,8 +2,7 @@
 #define PHYSICS_PHYSICSSOLVER_H_
 
 #include <glm/glm.hpp>
-#include <glm/ext.hpp>
-#include <glm/gtc/matrix_transform.hpp>
+#include "../typedefs.h"
 
 class Hitbox;
 class Chunks;
@@ -15,11 +14,11 @@ public:
 	void step(Chunks* chunks,
 			Hitbox* hitbox,
 			float delta,
-			unsigned substeps,
+			uint substeps,
 			bool shifting,
 			float gravityScale,
 			bool collisions);
-	void colisionCalc(Chunks* chunks, Hitbox* hitbox, glm::vec3* vel, glm::vec3* pos, glm::vec3 half);
+	void colisionCalc(Chunks* chunks, Hitbox* hitbox, glm::vec3& vel, glm::vec3& pos, const glm::vec3 half);
 	bool isBlockInside(int x, int y, int z, Hitbox* hitbox);
 };