Third Person Camera Collision - GameCreators Forum

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RUCCUS

19

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Joined: 11th Dec 2004

Location: Canada

Posted: 27th Dec 2006 02:42

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Just a snippet I made for a question someone had, I thought Id post it here, its a basic way of making sure the camera doesnt go behind polygons in a non-first person game.

+ Code Snippet

SYNC ON:SYNC RATE 0:AUTOCAM OFF:HIDE MOUSE

MAKE MATRIX 1,1000,1000,10,10

MAKE OBJECT CUBE 1,10

MAKE OBJECT BOX 2,100,100,10
POSITION OBJECT 2,0,50,100
wallDist# = 5

DO

   MOVE OBJECT 1, (UPKEY()-DOWNKEY())*0.5
   YROTATE OBJECT 1, WRAPVALUE(OBJECT ANGLE Y(1) + ((RIGHTKEY()-LEFTKEY())*0.5))

   x# = OBJECT POSITION X(1)
   y# = OBJECT POSITION Y(1)
   z# = OBJECT POSITION Z(1)

   angle# = OBJECT ANGLE Y(1)

   POSITION CAMERA x#,y#+20,z#
   YROTATE CAMERA angle#
   MOVE CAMERA -100

   cx# = CAMERA POSITION X()
   cy# = CAMERA POSITION Y()
   cz# = CAMERA POSITION Z()

   colDist# = INTERSECT OBJECT(2,cx#,cy#,cz#,x#,y#,z#)

   IF colDist#
      MOVE CAMERA colDist# + wallDist#
   ENDIF

   SYNC

LOOP

Not commented, pretty simple to understand.

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Zotoaster

19

Years of Service

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Joined: 20th Dec 2004

Location: Scotland

Posted: 28th Dec 2006 22:33

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Very clever. I always thought it would be something a little more complicated. Thanks for this.

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Terrorist Zero

18

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Joined: 29th Aug 2006

Location: Teh YouKai

Posted: 19th Jan 2007 22:50

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That's some really nice stuff, I'll probably have a go in a bit to get a smoother movement from close range to full range

www.tornupgaming.com
The home of free games and game projects.

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TEH_CODERER

21

Years of Service

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Joined: 12th Nov 2003

Location: Right behind you!

Posted: 19th Jan 2007 23:15

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Yep. That is what I usually do using Sparky's dll. Either that or my really cool camera system I made but haven't yet had a game to use it in. It does this but more stylishly! It smoothly curves the camera to the right position but, instead of letting the camera get pushed stupidly close up to the player, also checks all around the player for the best spot. The best spot is calculated by a ratio between how much space the camera would have there and how far the camera has to move from its current position to get there. It all works pretty well.

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Code Snippets / Third Person Camera Collision