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Posted: **Thu Feb 03, 2022 12:58 pm**

The movement isn't working as expected.

The friction between the player and the floor is really low, so when the player moves it should move crazy fast, both against a wall verticaly and when it moves horizontally.
But the player moves normally horizontally and only moves crazy fast vertically when it moves against a wall (even if it has no y velocity it gains some by just bumping into the wall).

Why does the friction/collision resolution not work as it should?
I'm stumped.

Code for resolving of collision
toybox/entites/Object.lua
~line 312

Code: Select all

function Object:__resolve_collision(instance, trash_separation_x, trash_separation_y, collision)
  --collision is collision data gotten from kikito's bump.lua
  
  local friction = instance.friction
  
  local normalX, normalY = collision.normal.x, collision.normal.y
  local tangentX, tangentY = -normalX, normalY
  -- relative velocity
  local vx = self.vx - (instance.vx or 0)
  local vy = self.vy - (instance.vy or 0)

  -- penetration speed
  local penetration_speed = vx * normalX + vy * normalY

  -- penetration component
  local penetration_x = normalX * penetration_speed
  local penetration_y = normalY * penetration_speed

  -- tangent component
  local tangent_x = vx - penetration_x 
  local tangent_y = vy - penetration_y

  -- restitution
  local restitution = 1 + math.max(self.bounce, instance.bounce or 0)

  -- friction
  local friction = math.max(self.friction, instance.friction or 0)
  
  -- change the velocity of shape a
   
  self.vx = vx - penetration_x * restitution + tangent_x * friction
  
  self.vy = vy - penetration_y * restitution + tangent_y * friction
end

Was coded on a touchscreen device but should work with keyboards too.
(kind of based of this)

But flip it, life's handing you lemons, make lemonade then

LÖVE

Collision resolving not behaving as expected

Collision resolving not behaving as expected