Player moving the enemy - GameCreators Forum

Author

Message

Kobaltic

12

Years of Service

User Offline

Joined: 24th Jan 2012

Location: PA, USA

Posted: 9th Jan 2014 02:49

Link

When the player collides with my enemy the enemy moves. I tried to turn off collision with setSpriteCollideBit but it didn't work. I set the player to collide bit 3 and not to collide with 4. I set the enemy to collide bit 4 and not to collide with 3. Thanks for the help. Here is some code:

player:

+ Code Snippet

    walkSwordmanI = loadImage("people/walkingSwordMan.png")
    walkSwordmanS = createSprite(walkSwordmanI)

    setSpriteAnimation(walkSwordmanS,96,96,64 )
    setSpriteOffset(walkSwordmanS, 48,48)
    SetSpriteScaleByOffset ( walkSwordmanS ,1 , 1 )
    setSpritePositionByOffset (walkSwordmanS,               resolutionOffsetX,resolutionOffsetY)
    setSpriteDepth (walkSwordmanS,5)
    setSpriteShapeBox(walkSwordmanS, -20,-36,20,38,0)
    setSpritePhysicsOn (walkSwordmanS, 2)  
    playSprite(walkSwordmanS, 1, 0, 33, 33)
    setSpritePhysicsCanRotate(walkSwordmanS,0)
    setSpriteCollideBit(walkSwordmanS, 4, 0)
    setSpriteCategoryBit(walkSwordmanS, 3, 1)

Here is the enemy:

+ Code Snippet

    gtwI = loadImage("enemies/gtw.png")
    gtwS = createSprite(gtwI)

    setSpriteAnimation(gtwS,96,96,64 )
    setSpriteOffset(gtwS, 48,48)
    SetSpriteScaleByOffset ( gtwS ,1 , 1 )
    setSpritePositionByOffset (gtwS, 100,500)
    setSpriteDepth (gtwS,5)
    setSpriteShapeBox(gtwS, -20,-36,20,38,0)
    setSpritePhysicsOn (gtwS, 2)
    setSpriteCollideBit(gtwS,3, 0)
    playSprite(gtwS, 1, 0, 33, 33)
    setSpritePhysicsCanRotate(gtwS,0)
    setSpriteCategoryBit(gtwS, 4, 1)

Back to top

Profile PM Email Website

Funnell7

13

Years of Service

User Offline

Joined: 8th Sep 2011

Location: UK, England

Posted: 9th Jan 2014 09:32 Edited at: 9th Jan 2014 09:35

Link

I set all my enemies up as sensors (SetSpritePhysicsIsSensor()). Alternatively I believe SetSpriteGroup may work too...

EDIT: Here's an extract from the SetSpriteGroup documentation:

In physics, sprites of the same positive group ID will always collide, whilst those that share the same negative group ID will never collide. Those with a group ID of zero (default), or differing group IDs move on to the category filter check.

Back to top

Profile PM Email

Ancient Lady

Valued Member

20

Years of Service

User Offline

Joined: 17th Mar 2004

Location: Anchorage, Alaska, USA

Posted: 9th Jan 2014 15:45

Link

Try moving "setSpriteCollideBit(gtwS,3, 0)" to after "setSpritePhysicsCanRotate(gtwS,0)". Sometimes physics attribute setting can wipe out other settings.

And, as Funnell7 suggests, try setting the collide bit to the same negative value.

Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master

Back to top

Profile PM

Kobaltic

12

Years of Service

User Offline

Joined: 24th Jan 2012

Location: PA, USA

Posted: 11th Jan 2014 01:59

Link

ok so I tried everything and nothing worked. If I use the getSpriteFirstContact on the player everything shows contact. If I use it on the enemy, I get a 1 on static objects but a 0 on dynamic objects. Will look into it more.

Back to top

Profile PM Email Website

Funnell7

13

Years of Service

User Offline

Joined: 8th Sep 2011

Location: UK, England

Posted: 11th Jan 2014 10:08

Link

Did you try SetSpritePhysicsIsSensor() for the enemies? This will prevent your character from interacting with them, but will still pick up on collisions etc.

Back to top

Profile PM Email

Kobaltic

12

Years of Service

User Offline

Joined: 24th Jan 2012

Location: PA, USA

Posted: 12th Jan 2014 02:01

Link

Yes I tried physics sensor.I get no collisions at all even when I check firstContact.

Back to top

Profile PM Email Website

Funnell7

13

Years of Service

User Offline

Joined: 8th Sep 2011

Location: UK, England

Posted: 12th Jan 2014 09:47

Link

That's interesting, I've not experienced that... But then to be fair, I don't use FirstContact, I use the GetSpriteCollision command. Does this simple project work for you?

SetVirtualResolution(480, 320)
SetSyncRate(60, 0)
SetClearColor(0, 0, 0)

SetPhysicsScale(0.05)
SetPhysicsGravity(0, 1000)
SetPhysicsWallTop(0)

global Ground
global Sprite
global Enemy
global CanJump

Ground = CreateSprite(0)
SetSpriteSize(Ground, 480, 30)
SetSpriteColor(Ground, 0, 255, 0, 255)
SetSpritePosition(Ground, 0, 290)
SetSpritePhysicsOn(Ground, 1)
SetSpritePhysicsRestitution(Ground, 0)

Sprite = CreateSprite(0)
SetSpriteSize(Sprite, 30, 30)
SetSpriteColor(Sprite, 255, 0, 0, 255)
SetSpritePosition(Sprite, 100, 260)
SetSpritePhysicsOn(Sprite, 2)
SetSpritePhysicsMass(Sprite, 20)
SetSpritePhysicsRestitution(Sprite, 0)

Enemy = CreateSprite(0)
SetSpriteSize(Enemy, 30, 30)
SetSpriteColor(Enemy, 255, 0, 0, 255)
SetSpritePosition(Enemy, 300, 260)
SetSpritePhysicsOn(Enemy, 3)
SetSpritePhysicsIsSensor(Enemy, 1)
SetSpritePhysicsMass(Enemy, 20)
SetSpritePhysicsRestitution(Enemy, 0)

do
    if GetSpriteCollision(Sprite, Enemy) = 1
        Print("Sprite Collision")
    endif

if GetPhysicsCollision(Sprite, Enemy) = 1
        Print("Physics Collision")
    endif

SetSpritePosition(Sprite, GetSpriteX(Sprite) + 1, 260)

Sync()
loop

+ Code Snippet

SetVirtualResolution(480, 320)
SetSyncRate(60, 0)
SetClearColor(0, 0, 0)

SetPhysicsScale(0.05)
SetPhysicsGravity(0, 1000)
SetPhysicsWallTop(0)

global Ground
global Sprite
global Enemy
global CanJump

Ground = CreateSprite(0)
SetSpriteSize(Ground, 480, 30)
SetSpriteColor(Ground, 0, 255, 0, 255)
SetSpritePosition(Ground, 0, 290)
SetSpritePhysicsOn(Ground, 1)
SetSpritePhysicsRestitution(Ground, 0)

Sprite = CreateSprite(0)
SetSpriteSize(Sprite, 30, 30)
SetSpriteColor(Sprite, 255, 0, 0, 255)
SetSpritePosition(Sprite, 100, 260)
SetSpritePhysicsOn(Sprite, 2)
SetSpritePhysicsMass(Sprite, 20)
SetSpritePhysicsRestitution(Sprite, 0)

Enemy = CreateSprite(0)
SetSpriteSize(Enemy, 30, 30)
SetSpriteColor(Enemy, 255, 0, 0, 255)
SetSpritePosition(Enemy, 300, 260)
SetSpritePhysicsOn(Enemy, 3)
SetSpritePhysicsIsSensor(Enemy, 1)
SetSpritePhysicsMass(Enemy, 20)
SetSpritePhysicsRestitution(Enemy, 0)

do
    if GetSpriteCollision(Sprite, Enemy) = 1
        Print("Sprite Collision")
    endif

    if GetPhysicsCollision(Sprite, Enemy) = 1
        Print("Physics Collision")
    endif

    SetSpritePosition(Sprite, GetSpriteX(Sprite) + 1, 260)

    Sync()
loop

Back to top

Profile PM Email

Kobaltic

12

Years of Service

User Offline

Joined: 24th Jan 2012

Location: PA, USA

Posted: 19th Jan 2014 03:40

Link

Ok so after a bunch of experiments here is what I have found out. A contact of collision only happens if at least one sprite is dynamic. Any sprite that is dynamic can be moved by another sprite.

I need to find a why to stop a dynamic sprite from moving.

Back to top

Profile PM Email Website

Sorry your browser is not supported!

AppGameKit Classic Chat / Player moving the enemy