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AppGameKit Classic Chat / Check All Collision at one code

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Behdadsoft
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Location: Tehran-Iran
Posted: 8th Jan 2016 19:08
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Hi.

I wrote my jump action (without physics) and now I need check collision between Player and all floors. I don't want check one by one floors and player collisions, So I need a way for check all at one code. (e.g: if Player is ground (need how can check it) then IsGround = 1).

please guide me to do this.

Thanks.
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Mobiius
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Posted: 8th Jan 2016 19:15
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Without looking at the help files, there should be collision commands where you can check against your object and 0. 0 means check against all objects.

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Phaelax
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Posted: 8th Jan 2016 20:02
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Checking against everything all the time is inefficient. Minimize the overhead by only checking those floor objects that are near the player. No point in checking if it hits something on a whole other screen away.

"I like offending people, because I think people who get offended should be offended." - Linus Torvalds
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Behdadsoft
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Posted: 8th Jan 2016 20:17 Edited at: 8th Jan 2016 21:10
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is a good way that I define all floors as Array and check them in a for loop?

like below example :

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MarcoBruti
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Posted: 8th Jan 2016 20:26
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Simply switch on physics, and use setSpriteCollideBits() and setSpriteCategoryBits(). Set gravity and all physics parameters to 0 in order gravity does not affect the movements. Set all sprite to kinematic (no mass). There is an example in the help files related to those commands.
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Behdadsoft
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Posted: 8th Jan 2016 20:55
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Quote: "Simply switch on physics, and use setSpriteCollideBits() and setSpriteCategoryBits(). Set gravity and all physics parameters to 0 in order gravity does not affect the movements. Set all sprite to kinematic (no mass). There is an example in the help files related to those commands."


OK, Thanks.

I check it.
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mrradd
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Posted: 10th Jan 2016 16:00
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I do what MarcoBruti, so I can use the AGK2's physics collision list--it works really well.

make -C ../NagGaCreMo/2016 -f aGame.mk
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Crazy Programmer
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Posted: 10th Jan 2016 17:35
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Quote: "I wrote my jump action (without physics) and now I need check collision between Player and all floors. I don't want check one by one floors and player collisions, So I need a way for check all at one code. (e.g: if Player is ground (need how can check it) then IsGround = 1)."


Set your Ground tiles to SpriteGroup = 1

Then Check a RayCastGroup from your players feet to check if it is touching the ground.

RayCast = SpriteGroupRayCast(1,PlayerX#,PlayerY#,PlayerX#,PlayerY# + CharacterSpriteHeight# + 1)

If RayCast = 1 and GetRawKeyPressed(32) = 1
//Do your jump stuff only if sprite is touching ground
endif


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Behdadsoft
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Posted: 12th Jan 2016 04:36
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Quote: "Set your Ground tiles to SpriteGroup = 1

Then Check a RayCastGroup from your players feet to check if it is touching the ground.

RayCast = SpriteGroupRayCast(1,PlayerX#,PlayerY#,PlayerX#,PlayerY# + CharacterSpriteHeight# + 1)

If RayCast = 1 and GetRawKeyPressed(32) = 1
//Do your jump stuff only if sprite is touching ground
endif"


Thanks, I think this is good idea.

is there any way to see RayCast?
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