Setting up a Ray Cast
Setting up a Ray Cast
Embedded Files
For the mushroom to stay on the platform
For the mushroom to stay on the platform
it must have some way to detect the edge
it must have some way to detect the edge
We can do this with a RayCast2D
We can do this with a RayCast2D
A RayCast is a ray cast out to find the first object
A RayCast is a ray cast out to find the first object
it collides with in the direction it was sent.
it collides with in the direction it was sent.
It may be the case that it doesn't collide with anything.
It may be the case that it doesn't collide with anything.
Add a RayCast2D node as a child of the Mushroom.
Add a RayCast2D node as a child of the Mushroom.
We want the Ray to detect when it is no longer on the floor
We want the Ray to detect when it is no longer on the floor
So place at the bottom of the mushroom, to the right.
So place at the bottom of the mushroom, to the right.
The Ray should be looking for collisions on the ground and pass_through layers so turn on Mask 2 and 3.
The Ray should be looking for collisions on the ground and pass_through layers so turn on Mask 2 and 3.
Scripting the Ray
Scripting the Ray
In the Mushroom Script
In the Mushroom Script
Add a function called platform_edge()
Add a function called platform_edge()
In it, check if the Ray is NOT colliding
In it, check if the Ray is NOT colliding
This means there is no platform below it
This means there is no platform below it
So reverse the direction of the mushroom
So reverse the direction of the mushroom
and move the Ray to check the opposite side.
and move the Ray to check the opposite side.
Call this function in _physics_process
Call this function in _physics_process
Now mushrooms which are on floating platforms
Now mushrooms which are on floating platforms
Will patrol the platform and not fall off.
Will patrol the platform and not fall off.
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