camera wont keep facing same direction as player!

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David iz cool

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Posted: 25th Nov 2005 02:39

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im trying to code a 3rd person camera:

heres my code:

+ Code Snippet

position camera object position x(1),object position y(1)+10,object position z(1)-10
set camera to object orientation 1

the camera follows & rotates with the player until i turn a certain angle,then the camera stops rotating with the player!!!

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Lost in Thought

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Location: U.S.A. : Douglas, Georgia

Posted: 25th Nov 2005 03:05 Edited at: 25th Nov 2005 03:10

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This is no bug. It is behaving exactly like you have it programmed.

[edit] Try something like adding a limb to keep up with your camera's position in relation to the object's, instead of just offsetting on each axis without taking into consideration the rotation of the object.

sync on : sync rate 30
hide mouse : autocam off
make matrix 1, 500, 500, 25, 25
make object cube 1, 10
position object 1, 250,10,250
make object plain 2, 1, 1, 1
make mesh from object 1, 2
delete object 2
add limb 1, 1, 1
delete mesh 1
hide limb 1, 1
offset limb 1, 1, 0, 10, -10

do
   rotate object 1, object angle x(1)+(mousemovey()/2),object angle y(1)+(mousemovex()/2),0
   if object angle x(1)>90 then xrotate object 1, 90
   if object angle x(1)<-90 then xrotate object 1, -90
   cx#=object angle x(1) : cy#=object angle y(1) : cz#=object angle z(1)
   if upkey()=1
		xrotate object 1, 0: move object 1, 3 : xrotate object 1, cx#
   endif
	if downkey()=1
		xrotate object 1, 0: move object 1, -3 : xrotate object 1, cx#
	endif
	
	if rightkey()=1
		xrotate object 1, 0: yrotate object 1, cy# + 90: move object 1, 3: xrotate object 1, cx#: yrotate object 1, cy#
	endif
	if leftkey()=1
		xrotate object 1, 0: yrotate object 1, cy# - 90: move object 1, 3: xrotate object 1, cx#: yrotate object 1, cy#
	endif
	position camera limb position x(1,1),limb position y(1,1),limb position z(1,1)
	set camera to object orientation 1
	
  sync
loop

+ Code Snippet

sync on : sync rate 30
hide mouse : autocam off
make matrix 1, 500, 500, 25, 25
make object cube 1, 10
position object 1, 250,10,250
make object plain 2, 1, 1, 1
make mesh from object 1, 2
delete object 2
add limb 1, 1, 1
delete mesh 1
hide limb 1, 1
offset limb 1, 1, 0, 10, -10

do
   rotate object 1, object angle x(1)+(mousemovey()/2),object angle y(1)+(mousemovex()/2),0
   if object angle x(1)>90 then xrotate object 1, 90
   if object angle x(1)<-90 then xrotate object 1, -90
   cx#=object angle x(1) : cy#=object angle y(1) : cz#=object angle z(1)
   if upkey()=1
		xrotate object 1, 0: move object 1, 3 : xrotate object 1, cx#
   endif
	if downkey()=1
		xrotate object 1, 0: move object 1, -3 : xrotate object 1, cx#
	endif
	
	if rightkey()=1
		xrotate object 1, 0: yrotate object 1, cy# + 90: move object 1, 3: xrotate object 1, cx#: yrotate object 1, cy#
	endif
	if leftkey()=1
		xrotate object 1, 0: yrotate object 1, cy# - 90: move object 1, 3: xrotate object 1, cx#: yrotate object 1, cy#
	endif
	position camera limb position x(1,1),limb position y(1,1),limb position z(1,1)
	set camera to object orientation 1
	
  sync
loop

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Richard Davey

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Location: On the Jupiter Probe

Posted: 25th Nov 2005 03:07

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Rejected - take this back to the Newcomers/DB board, and try following the advice I gave you there re: posting some working code people can point to and say "change this bit".

Fat kids always win at see-saw.

The world is full of idiots. But an unusually high percentage seem to appear on my TV screen.

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David iz cool

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Posted: 25th Nov 2005 03:17 Edited at: 25th Nov 2005 03:17

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thanks for the help,but i already know how to keep the camera with the player.my problem is im trying to get the camera to follow the player & keep facing the direction the player is going all the time.i posted my code over here:

http://forum.thegamecreators.com/?m=forum_view&t=65683&b=7

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Lost in Thought

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Posted: 25th Nov 2005 03:22

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I would still stick with limbs. My code works ... yours does not. The reason yours isn't working is that your code is not positiong the camera exactly 10 units directly behind and above the object. As your rotation change your camera is not moving. My code uses an offset limb to maove the camera even when the object isn't moving and is only rotating. This puts the camera exaclty 10 units behind the object and 10 above no matter which direction the object is facing. This is why your is not working. The camera and objects are the same angle, the cameras position in relation to the object's is just not being updated properly.

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David iz cool

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Posted: 25th Nov 2005 03:34

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thanks.im actually trying to modify your code.it works but i dont want rotation using the mouse,im trying to get the camera to update rotation with only arrow keys. so i move my player & the camera just truely follows behind the player. my ultimate goal is to have the camera follow and also point toward the player.

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Lost in Thought

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Posted: 25th Nov 2005 04:39 Edited at: 25th Nov 2005 04:42

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The only part of my code you need to work with whatever you have for roatation and movement is this for the main player setup (use your model in place of make object cube)

+ Code Snippet

`make main player
make object cube 1, 10
`make limb to keep camera positioned correctly
limbnum = 1
make object plain 2, 1, 1, 1
make mesh from object 1, 2
delete object 2
add limb 1, limbnum, 1
delete mesh 1
hide limb 1, 1
offset limb 1, limbnum, 0, 10, -10

or this for a player object with more than 1 limb already

+ Code Snippet

`make player
make object cube 1, 10
`make limb for camera position
perform checklist for object limbs 1
limbnum = checklist quantity()
empty checklist
make object plain 2, 1, 1, 1
make mesh from object 1, 2
delete object 2
add limb 1, limbnum, 1
delete mesh 1
hide limb 1, 1
offset limb 1, limbnum, 0, 10, -10

and this right before the sync in your loop

+ Code Snippet

	position camera limb position x(1,limbnum),limb position y(1,limbnum),limb position z(1,limbnum)
	set camera to object orientation 1

or

+ Code Snippet

	position camera limb position x(1,limbnum),limb position y(1,limbnum),limb position z(1,limbnum)
	point camera object position x(1), object position y(1), object position z(1)

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David iz cool

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Posted: 25th Nov 2005 05:12 Edited at: 25th Nov 2005 06:11

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i found this code in the codebase:

+ Code Snippet

FUNCTION CameraWatch(ObjNum,Height,Dist,CamNum)
rem Set Camera Range CamNum, 0, Dist + 1000 -this seems
`to make dbp crash at compile-------------------
X# = Object Position X(ObjNum)
Z# = Object Position Z(ObjNum)
Y# = Object Position Y(ObjNum)
Set Camera To Object Orientation CamNum, ObjNum
Position Camera CamNum, X#, Y# + Height, Z#
Move Camera CamNum, Dist * -1
Point Camera CamNum, X#, Y#, Z#
ENDFUNCTION

only difference between this code & yours is when i add the point camera command to point the camera toward my player with your code,when dbp compiles the game i get a crash message,then dbp runs the game...???
so i will probablly have to go with the code i found in the codebase.but thankyou very much for your help lost in thought!!!

the only thing i need to figure out now is how to make the camera move more smoothly ,not so rigid with the player.(but ill figure it out somehow...someday :p )

thanks!

edit:

alright!! i came up with this code:

+ Code Snippet


   set camera to follow object position x(1),object position y(1),object position z(1),object angle y(1),4,15,50,0
   rotate camera object angle x(1),object angle y(1),object angle z(1)
   move camera 1*-0.7

its almost exactly what i wanted! thanks to everyone that helped!

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David iz cool

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Posted: 26th Nov 2005 14:24

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here is some code that demonstrates exactly what im talking about.

the camera follows until you get to a certain angle then it does not follow anymore.

+ Code Snippet


autocam off

make matrix 1,100,100,10,10

make object box 1,5,5,5

do


move object 1,0.1
turn object right 1,0.1

set camera to follow 0,object position x(1),object position y(1),object position z(1),object angle y(1),12,8,70,0


loop

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spooky

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Posted: 27th Nov 2005 00:45

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You can't use the 'free rotate' commands to move your object when using set camera to follow, because of euler angles oddities when you get to certain angles. You need to use standard rotate commands.

So replace youe turn object command with;

yrotate object 1,wrapvalue(object angle y(1)+0.1)

and all is well.

Understanding the way DBPro deals with euler angles takes a bit of getting used to - took me a LONG time.

Boo!

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David iz cool

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Posted: 28th Nov 2005 06:55

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thank you soo much spooky!!!

this is twice now youve helped me with something difficult that i couldnt figure out in dbp!

i rreeeeaaally appreciate your help!!!

thankyou!!

your friend David

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