[Lập trình game] Lesson 11: Godot’s Raycast2D Enemy – Part 2

In this article, I will guide you to create raycast2D so that the enemy can move on the terrain as shown below without falling down. And let’s get started

RAYCAST2D EASY

Here Raycast 2D is 1 node: Query object intersecting ray means Raycast 2D is 1 ray and this ray is used to query object when intersecting ray

ENEMY

Next is the enemy you enter the enemy’s sence

Find yourself raycast2D

And be like this

Here you do not use the mouse but use the right arrow key to move it to the edge collsionshape

And almost as open as me

On the side of the nature, pay attention to yourself Enable and Cast to

live Enabled you click for yourself and raycast will turn blue

LIVE cast to part y you cast it close under the enemy

Like the picture, this enemy is too small so I’ll adjust the scale raycast wall 0.5, 0.5

And after adjusting the scale, you also have to adjust the other part

Next we will code it

And Coding for me

Below if is_on_wall

You add yourself as

if $Raycast2D.is_collding == false:

vitri = vitri * -1

Here $Raycat2D is called raycast2d || is_collecting is the command: Returns whether any object is intersecting the vector ray which here we attach = false means it will not intersect at all.

And vitri = vitri * -1 here means the enemy will move in reverse when on the terrain that I mentioned at the beginning of the article

And you notice when it has moved back but this raycast2D it doesn’t move back anymore so we need to adjust it.

You add $RayCast2D.position.x *= -1 into the if is_on_wall and raycast collecting Please

This is the help command Raycast 2D can change direction and you can apply to other nodes like collsionshape etc

It is done

And remember to delete *delta let’s go

If the code does not run, the code is as below