7.6 KiB
7.6 KiB
Lesson 12: Player-Enemy Collisions
- Links
- Notes
- in the case where animation frames change shape
- Video Contents
Notes
add collision shape to enemy sprite
- add CollisionShape2D to sprite root
add shape
- select collision shape 2D node from Scene Panel
- Go to Inspector->CollisionShape2D->Shape
- select 'CapsuleShape2D' from dropdown
modify shape
- Inspector->CollisionShape2D->Node2D->Transform
- Go to Rotation and set to 90 degrees
- Modify shape via handles to adjust it over sprite
set the z-index
- in CollisionShape2D to 0
- in sprite root node to 1
make sure collision shape fits all the animation frames
- go to the AnimateSprit2D node
- Inspector->AnimatedSprite2D->Animation->Frame
- scroll through the frames to see if they fit the collision shape properly
method 1: using character bodies and collision shapes
default collision code
- default collision handling occurs between two CharacterBody2D nodes
- limits each others movements
- occurs after the
move_and_slidefunction is called
NOTE: you are not expected to put this into the script!!!
# Using move_and_collide.
var collision = move_and_collide(velocity * delta)
if collision:
print("I collided with ", collision.get_collider().name)handle collisions (scaffolding)
-
first get the number of collisions that occurred
- this is in
get_slide_collision_count()function
- this is in
-
loop through the number with an index
-
in each loop get the collision info object for that index with
get_slide_collisions()get_slide_collisiontakes an index
- to get the collider call
get_collider()on the collision info object
-
- the function scaffolding:
# this is the basic function
func handleCollision():
for i in get_slide_collision_count():
var collision = get_slide_collision(i)
var collider = collision.get_collider()
priint_debug(collider.name)-
place this function in
func _physics_process(delta)- put it after
move_and_slidebut beforeupdateAnimation - example:
- put it after
func _physics_process(delta):
handleInput()
move_and_slide()
handleCollision()
updateAnimation()problems
-
the player sprite might only have the shape on the lower part of his body and not the upper
- this is to allow him to move the body against a tree or other object and only block by the feet
- this causes the enemy sprite to walk directly through the player
layer and mask
change collision layer and mask for players
- [Player Root Node]->Inspector->CharacterBody2D->Layers
-
How Layers work
- the numbers of the layers selected determines what he looks for
- you can change the name of the layer by clicking on the three dots to the right
-
change the layers names
- Layer 1: 'player'
- Layer 2: 'enemy'
change the collision layer and mask for enemies
- [Enemy Sprite] -> [Enemy Root Node] -> Inspector -> CollisionObject2D -> Collision -> Layers
- move the sprites layer and mask to '2'
enabling enemy sprites to collide with tilemap
- make all enemy sprites children of the tilemap
-
[Tilemap Node] -> Inspector -> TileMapLayer -> TILESET
- INSIDE the "tileset" dropdown, click on whatever element was selected
- this will open up the physics layer
- set the layers and masks to BOTH "1" and "2"
method2: hurt box and hit box
basic
- add hurt box to player
- add hit box to enemy
create hurt box
-
add Area2D node to [Player Scene]
- you can rename it 'hurtBox'
-
add a CollisionShape2D to the Area2D node
-
[hurtBox node] -> CollisionsShape2D -> Inspector -> CollisionShape2D -> Shape
- select what shape you want from the dropdown box
-
-
set the collision properties for the hurt box
- [hurtBox node] -> CollisionObject2D -> Collision
- set ONLY the mask to "1" and "2"
create hit box
- go to NPC sprite
-
add Area2D node
- rename 'hitBox'
-
add CollisionShape2D to Area2D node
- rotate it 90
in the case where animation frames change shape
modify sprite scene
- add AnimationPlayer node to scene
- remove AnimatedSprite2D
-
add regular Sprite2D node
-
set texture on sprite
- drag sprite texture to Sprite2D->Inspector->Sprite2D->Texture
-
set Hframes and Vframes correctly
- Sprite2D->Inspector->Sprite2D->Animation
- move sprite up over center of scene
-
MOVE THE AREA2D FOR PROPER DRAWING
- area2D node must be lower than the Sprite2D node
- this will draw it on top of the sprite
- make it easier to animate properly
modify AnimationPlayer node
- select node
-
in lower pane, find "Animation" dropdown
- select "New"
- call it "walkDown"
-
set snap to 0.2
add sprite animations
- [Sprite2D node] -> Inspector -> Sprite2D -> Animation
- select the X and Y of Frame Coords
-
click the key button
-
screen should look like
- set animation length to 0.8
-
enable looping
add collision detection to the frames
- select Area2D->CollisionShape2D node
- Inspector-> Node2D-> Transform
-
make sure the bottom animation panel is visible
- select the first frame
-
lock properties to the frames using key buttons
- position
-
scale
go to the next FRAME in the animation panel
- adjust the shape of the collision area
- lock the properties as before
changing shape
-
changing shape is IMPOSSIBLE
- we must change scale
- click the chains to allow you to change x and y axis independently
- click on the text box for each to change it
discreate changes
- the shape will appear to not change properly with the sprite
- this is because it's update mode is set to 'continuous'
-
change it to discrete on both scaling and positioning
update the rest of the animations
- duplicate the current animation
- modify and set whatever properties are necessary for each animation
modify script
- set the animations variable from $AnimatedSprite2D to $AnimationPlayer
adding hurt to hit box collision
hit box
- Player->hurtBox->Node Tab (not Inspector!)->Area2D->area_entered(area: Area2D)