how to make a "jump" in 3D ?

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wedoe

This is one way to jump in 3D.
(Fast editing of one of the examples that comes with BB3D)

Open in online IDE

; Jump and collision
; Einar Wedoe
; Based on the example by Paul Gerfen

Graphics3D 800,600,16,2

Const CUBE_COL=1
Const SPHERE_COL=2
Global vel#=0

SetBuffer BackBuffer()

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

light=CreateLight()

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

sphere=CreateSphere(12)
PositionEntity sphere,0,3,5
EntityColor sphere,170,80,90
EntityType sphere,SPHERE_COL

Collisions SPHERE_COL,CUBE_COL,3,1

While Not KeyHit(1)

vel=vel-0.01
MoveEntity sphere,0,vel,0

UpdateWorld
RenderWorld

If EntityCollided(sphere,CUBE_COL) Then vel=.4
									
If KeyDown(203) Then TurnEntity camera,0,0,2
If KeyDown(205) Then TurnEntity camera,0,0,-2

TurnEntity cube,0,1,0
TurnEntity sphere,0,-2,0

Flip
Wend

End