fix: decouple input's movement from framerate

Author: iWas-Coder

src/Runtime/InputComponent.hh

@@ -12,6 +12,6 @@ namespace volt::runtime {
     uint16_t left  { KEY_A };
     uint16_t down  { KEY_S };
     uint16_t right { KEY_D };
-    float impulse  { 4.0f  };
+    float impulse  { 250   };
   };
 }

src/Runtime/InputSystem.cc

@@ -1,6 +1,7 @@
 #include "InputSystem.hh"
 #include "InputComponent.hh"
 #include "../Core/LogSystem.hh"
+#include "../Core/Timepoint.hh"
 #include "Rigidbody2DComponent.hh"
 
 namespace volt::runtime {
@@ -15,10 +16,10 @@ namespace volt::runtime {
   void InputSystem::Update(Scene &s) {
     s.ForAll<InputComponent, Rigidbody2DComponent>([](auto, auto &i, auto &rb) {
       rb.velocity = {0, 0};
-      if (IsKeyDown(i.left))  rb.velocity.X(rb.velocity.X() - i.impulse);
-      if (IsKeyDown(i.right)) rb.velocity.X(rb.velocity.X() + i.impulse);
-      if (IsKeyDown(i.up))    rb.velocity.Y(rb.velocity.Y() - i.impulse);
-      if (IsKeyDown(i.down))  rb.velocity.Y(rb.velocity.Y() + i.impulse);
+      if (IsKeyDown(i.left))  rb.velocity.X((rb.velocity.X() - i.impulse) * core::GetDeltaTime());
+      if (IsKeyDown(i.right)) rb.velocity.X((rb.velocity.X() + i.impulse) * core::GetDeltaTime());
+      if (IsKeyDown(i.up))    rb.velocity.Y((rb.velocity.Y() - i.impulse) * core::GetDeltaTime());
+      if (IsKeyDown(i.down))  rb.velocity.Y((rb.velocity.Y() + i.impulse) * core::GetDeltaTime());
     });
   }
 }