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Need Help With Basic Collisions


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Hello. I am super new to Leadwerks, Lua script, and OOP languages in general. I am just trying to put together a simple game where the player can move a character around a room and dodge a bouncing ball-of-death; but the collisions are giving me a hard time.


At this point, the script attached to my player character model simply contains the following code:

Script.moveRate = 0.05 --float "Movement Rate"

function Script:UpdatePhysics()

if window:KeyDown(Key.W) then
self.entity:Translate(0, 0, self.moveRate)
if window:KeyDown(Key.S) then
self.entity:Translate(0, 0, -self.moveRate)
if window:KeyDown(Key.A) then
self.entity:Translate(-self.moveRate, 0, 0)

if window:KeyDown(Key.D) then
self.entity:Translate(self.moveRate, 0, 0)



I have tried using Leadwerk's built-in physics to handle collisions, but they yield unwanted results. If the Physics Mode is set to Rigid Body, then the character model gets knocked over upon making contact with a wall brush; and if the Physics mode is set to Character Physics, the model sinks halfway into the floor brush and bounces when it collides with a wall, sometimes being launched away from the wall when the button is released. I have tried various setting combinations of Physics Mode and Physics Types, but none have yielded better results.


In light of this, I thought I might try writing my own code to handle the collision behavior, but I can't seem to find any commands in the API reference that deal with collisions, aside from the CollisionHook command, which I am completely baffled by. (I have no idea what a "hook" is, and there is no example code given.)


Apparently, I am missing something, somewhere. Can anyone point me in the right direction?



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When you use the entity movement commands like Translate, it does not result in actual physics forces being applied. What you really want to do is call AddForce() or even SetVelocity() instead. Make sure the object has a mass greater than zero.

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