A small FPS test, A player walks around in a small terrain, need help with collision

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Newcomers DBPro Corner / A small FPS test, A player walks around in a small terrain, need help with collision

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mnemonic

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Joined: 14th Jan 2007

Location: Sweden

Posted: 6th Feb 2012 13:00

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I have made a small terrain using TE.d. It's small rocky landscape.
I'll show you nthe code, so that you can see what I try to accomplish

+ Code Snippet

sync on
sync rate 40
load object "mymap.x",1
set object collision to polygons 1

rem the player object
make object cube 2,1
set object collision to polygons 2


position object 1,0,0,0
position camera 0,0,100,0


do

position object 2, camera position x(0),camera position y(0),camera position z(0)    



control camera using arrowkeys 0,2,2
if KEYSTATE(17) then pitch camera up 0,15
if KEYSTATE(31) then pitch camera down 0,15




sync    
LOOP

Object 1 is the terrain, and object 2 is the player object set to follow the camera as you can see in the first line in the application loop.

I have set the both objects to polygon collison, but they do not detect collisions at all (I can 'walk' through the terrain)

When I tried using automatic camera collision it worked, the camera collided nicely to the terrain. But now as you see I want the object themselves to collide, but they don't detect it? Anything else I have to do to make this work?

<a href="http://www.memblockgames.com">www.memblockgames.com</a>

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nonZero

Years of Service

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Joined: 10th Jul 2011

Location: Dark Empire HQ, Otherworld, Silent Hill

Posted: 6th Feb 2012 21:11

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I'm going to assume the code you posted is not your actual code because I don't see any object collision statements (IF OBJECT COLLISION(cheese, mouse) = 1...etc). I think posting a little more of your code might get you some more in-depth answers.
Anyhow, off the bat I can suggest you don't use the camera to orient your player but rather use the player to orient the camera. The reason for this is because the camera (USING ARROWKEYS) is not subject to any physics. So a number of things can happen depending of how you've coded such as the player being repositioned before a collision check is done, the camera continuing to move even if the player has stopped or the player getting "dragged along" by the camera in spite of collision - to list a few (all depends on the code and structure). So rather put the horse before the cart.

+ Code Snippet

   DO
         `Just to make the code more readable
         plx# = OBJECT POSITION X(player)
         ply# = OBJECT POSITION Y(player)
         plz# = OBJECT POSITION Z(player)

         IF OBJECT COLLISION(player, ground) = 1
               `etc, reposition, etc
         ENDIF

         `The reason I included an offset is in case you wanted to give a more
         `realistice= view: ie positioning the camera where the head is
         POSITION CAMERA 0, plx# + offsetx#, ply# + offsety#, plz# + offsetz#

         `Camera obviously faces where player faces
         ROTATE CAMERA 0, OBJECT ANGLE X(player), OBJECT ANGLE Y(player), OBJECT ANGLE Z(player)

         `Controls, other stuff, etc

   LOOP

This is a very crude example, and I'd generally not put all the code in one loop but in functions - anyway it's just an outline. Hopefully this solves the problem. If not you might want to post a more in-depth chunk of your code.

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Newcomers DBPro Corner / A small FPS test, A player walks around in a small terrain, need help with collision