Animating a open door. - GameCreators Forum

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Guardian

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Posted: 23rd Aug 2006 02:01 Edited at: 23rd Aug 2006 02:08

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Hi, I'm using the dark physics to try to add a door mechanism to the fps simultion, Something similar to the startrek sliding doors. I animated two cubes moving away from the door using a model editor and added it in. However the collision doesn't change, i still can't enter through the hole and were the doors had moved there is no collsion detection. I'm using the code provided in the example of the fps creator level. I'm making the doors phy make rigid body static mesh. I tried deleting the rigid body and then adding it in again thinking that it would redo it. Hopefully someone can help me with this, thank you.

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imekon

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Posted: 23rd Aug 2006 08:32

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I think you have to create it as three objects - one rigid body static, the frame and two dynamic. You can't use animation as that doesn't get converted to the physics world (I think). You can check this with the debugger.

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Fallout

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Posted: 23rd Aug 2006 11:18 Edited at: 23rd Aug 2006 11:20

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Try adding 2 models, one for each side of the sliding door (or one cube if the door just slides one way). Make them into kinematic objects (phy make rigid body dynamic box, then phy set rigid body kinematic), then write a little function to move the doors manually, repositioning them using phy set rigid body kinematic position. Should do the job, but you'll have to write some code to move the doors in code, not using an animation in a modeller.

Edit: Btw, creating the doors as a static mesh definitely won't work. Only ever create things using static meshes if they'll never move (i.e. level walls, floor, ceiling etc). Definitely not doors, unless you want them to stay perminently closed, or have to delete them to open them.

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Guardian

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Posted: 23rd Aug 2006 15:43 Edited at: 23rd Aug 2006 16:17

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Thank you I managed to get it to work using box static box and the kinematic position. Static box by using the phy set rigid body position. However I ran into another problem only one side panel will move, and i'm not sure why I even tried to delete the phy and move and re-enable it. This is the code I used to move it

+ Code Snippet

phy set rigid body kinematic position 52, CURVEVALUE(-250, 0, -1), object position y ( 52 ), object position z ( 52 )
phy set rigid body kinematic position 51, CURVEVALUE(250, 0, 1), object position y ( 51 ), object position z ( 51 )

I figured if one door moved the other one should as well.

I then paired it up with the position object commmand. The help file mentions that after the simulation takes effect the position object command will not work. However in this case it seems to for the second object. The first object will move as its supposed to by just using kinematic position commands or rigid body position commands while the other requires both. One to set the collision area and one to actual move the rendering of the object.

Anyone have any idea why?

Thanks.

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HowDo

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Posted: 23rd Aug 2006 16:44

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if the top line is the one not working try taking the -1 bit out putting 1

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Guardian

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Posted: 23rd Aug 2006 16:53

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I took out the curvevalue part out and replaced it with the -250 outright. That still didn't do the the trick, i wonder if it might be a bug more then the coding. This is what I had to do to get it to work right.

+ Code Snippet

load object "Ldoor.x",4
set object light 4, 0
texture object 4,2
phy make rigid body dynamic box 4
phy set rigid body kinematic 4,1
 phy set rigid body kinematic position 4, -250, object position y ( 4 ), object position z ( 4 )
position object 4, -250,object position y(4), object position z(4)

If I don't put the position object command in the only thing that moves is the collision area not that actual object.

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HowDo

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Posted: 24th Aug 2006 06:35

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A demo of what I think you are after, when you've worked out how its working then put those bits into your program

Rem ***** Main Source File *****
` set up the program
sync on
sync rate 60
phy start
autocam off
position camera -20,20,-25
point camera 0,10,0
make light 1
set directional light 1, -5,-5,5

` make the floor
make object box 1,40,1,40
phy make rigid body static box 1

` create  dynamic box and make this one kinematic
make object box 4,5,5,5
position object 4,10,6,0
phy make rigid body dynamic box 4
phy set rigid body kinematic 4, 1

` create second dynamic box and make this one kinematic
make object box 5,5,5,5
position object 5,-10,6,0
phy make rigid body dynamic box 5
phy set rigid body kinematic 5, 1
` colour all of our objects
for i = 4 to 6
   if object exist ( i )
      color object i, rgb ( rnd ( 255 ), rnd ( 255 ), rnd ( 255 ) )
      set object specular i, rgb ( rnd ( 255 ), rnd ( 255 ), rnd ( 255 ) )
      set object specular power i, 255
      set object ambient i,0
   endif
next i

` some variables we use in the main loop
x# = 0
x2#=9
move = 0

` main program loop
do
   ` adjust the position of the kinematic object on the x axis
   if move = 0
      x# = x# - 0.1
      x2#=x2#+ 0.1
      if x# < -2
         move = 1
      endif
   endif

if move = 1
      x# = x# + 0.1
      x2#=x2#-0.1
      if x# > 2
         move = 0
      endif
   endif

` control the position of the kinematic object
   phy set rigid body kinematic position 4, x#, 6, 0
   phy set rigid body kinematic position 5, x2#, 6, 0

` update the simulation and screen
   phy update
   sync
loop

+ Code Snippet

Rem ***** Main Source File *****
` set up the program
sync on
sync rate 60
phy start
autocam off
position camera -20,20,-25
point camera 0,10,0
make light 1
set directional light 1, -5,-5,5

` make the floor
make object box 1,40,1,40
phy make rigid body static box 1

` create  dynamic box and make this one kinematic
make object box 4,5,5,5
position object 4,10,6,0
phy make rigid body dynamic box 4
phy set rigid body kinematic 4, 1

` create second dynamic box and make this one kinematic
make object box 5,5,5,5
position object 5,-10,6,0
phy make rigid body dynamic box 5
phy set rigid body kinematic 5, 1
` colour all of our objects
for i = 4 to 6
   if object exist ( i )
      color object i, rgb ( rnd ( 255 ), rnd ( 255 ), rnd ( 255 ) )
      set object specular i, rgb ( rnd ( 255 ), rnd ( 255 ), rnd ( 255 ) )
      set object specular power i, 255
      set object ambient i,0
   endif
next i


` some variables we use in the main loop
x# = 0
x2#=9
move = 0

` main program loop
do
   ` adjust the position of the kinematic object on the x axis
   if move = 0
      x# = x# - 0.1
      x2#=x2#+ 0.1
      if x# < -2
         move = 1
      endif
   endif

   if move = 1
      x# = x# + 0.1
      x2#=x2#-0.1
      if x# > 2
         move = 0
      endif
   endif

   ` control the position of the kinematic object
   phy set rigid body kinematic position 4, x#, 6, 0
   phy set rigid body kinematic position 5, x2#, 6, 0

   ` update the simulation and screen
   phy update
   sync
loop

Dark Physics makes any hot drink go cold.

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Dark Physics & Dark A.I. & Dark Dynamix / Animating a open door.