Add acceleration to movement code

src/include/Dengine/Entity.h

@@ -17,7 +17,10 @@ public:
 	Entity(const glm::vec2 pos, const std::string texName);
 	~Entity();
 
-	glm::vec2 pos;
+
+	glm::vec2 pos;  // Position
+	glm::vec2 dPos; // Velocity
+
 	glm::vec2 size;
 	const Texture *tex;
 };

src/include/Dengine/Math.h

@@ -0,0 +1,19 @@
+#ifndef DENGINE_MATH_H
+#define DENGINE_MATH_H
+
+#include <Dengine/Common.h>
+
+namespace Dengine
+{
+class Math
+{
+public:
+	static inline f32 squared(const f32 a)
+	{
+		f32 result = a * a;
+		return result;
+	}
+};
+}
+#endif
+

src/include/WorldTraveller/WorldTraveller.h

@@ -1,17 +1,18 @@
 #ifndef WORLDTRAVELLER_GAME_H
 #define WORLDTRAVELLER_GAME_H
 
-#include <Dengine/OpenGL.h>
+#include <Dengine/AssetManager.h>
 #include <Dengine/Common.h>
+#include <Dengine/Entity.h>
+#include <Dengine/Math.h>
+#include <Dengine/OpenGL.h>
 #include <Dengine/Renderer.h>
 #include <Dengine/Shader.h>
-#include <Dengine/AssetManager.h>
-#include <Dengine/Entity.h>
 
 namespace WorldTraveller
 {
 GLOBAL_VAR const i32 NUM_KEYS = 1024;
-GLOBAL_VAR const i32 METERS_TO_PIXEL = 100;
+GLOBAL_VAR const f32 METERS_TO_PIXEL = 100;
 
 enum Cardinal
 {