Magical Collisions

Blitz3D Forums/Blitz3D Programming/Magical Collisions

EvilMeowChi

(Posted 2004) [#1]

Hey, im working on a game, thats a side scrolling shooter, kind of like defender. Of course its in 3d though. I had a question about collisions, what would be the fastest way to detect a collision between my ship, and say a bunch of asteroids. There will be probably about 30 or 40 asteroids at a time of different sizes and shapes. What do i do to detect when i hit one? It needs to be fast. Ive never used colisions before so treat me like an idiot. Thanks in advance.

AvestheFox

(Posted 2004) [#2]

From the BB Help Archives (supplied with your software)

 Graphics3D 800,600

  Const CUBE_COL=1
  Const SPHERE_COL=2

  SetBuffer BackBuffer()

  camera=CreateCamera()
  CameraViewport camera,0,0,800,600
  PositionEntity camera,0,0,-5

  light=CreatLight()

  cube=CreateCube()
  PositionEntity cube,-5,0,5
  EntityColor cube,70,80,190
  EntityType cube,CUBE_COL

  sphere=CreateSphere(12)
  PositionEntity sphere,5,0,5
  EntityColor sphere,170,80,90
  EntityType sphere,SPHERE_COL

  Collisions SPHERE_COL,CUBE_COL,3,1

  While Not KeyHit(1)

  MoveEntity sphere,-0.02,0,0

  UpdateWorld
  RenderWorld

  If EntityCollided(sphere,CUBE_COL) Then
  Text 370,80,"Collided !!!"
  EndIf

  Text 335,500,"Collision Detection"
  Flip

  Wend

  End

To perform a simple function upon colision (this, ofcoarse coming out of the code above) study the code below

If EntityCollided(sphere,CUBE_COL) Then
  Text 370,80,"Collided !!!"
  EndIf