Make dragging feel super good Kreygasm

src/boomer.nim

@@ -301,7 +301,10 @@ proc main() =
         if mouse.drag:
           let delta = world(camera, mouse.prev) - world(camera, mouse.curr)
           camera.position += delta
-          camera.velocity = delta * config.dragVelocityFactor
+          # delta is the distance the mouse traveled in a single
+          # frame. To turn the velocity into units/second we need to
+          # multiple it by FPS.
+          camera.velocity = delta * config.fps.float
 
         mouse.prev = mouse.curr
 

src/config.nim

@@ -2,15 +2,13 @@ import macros, strutils
 
 type Config* = object
   scrollSpeed*: float
-  dragVelocityFactor*: float
   dragFriction*: float
   scaleFriction*: float
   fps*: int
 
 const defaultConfig* = Config(
-  scrollSpeed: 1.0,
-  dragVelocityFactor: 10.0,
-  dragFriction: 2.0,
+  scrollSpeed: 1.5,
+  dragFriction: 6.0,
   scaleFriction: 4.0,
   fps: 60
 )