PhysicsShapeRadius# ( shape )

Parameters

shape - live physics shape handle

Description

Returns the native sphere or capsule radius in metres.

This is half the authored diameter and excludes the capsule segment length. Other shape kinds raise a runtime error.

This is read-only. Wrong-kind/stale handles and unsupported typed inspections raise runtime errors. Frame/dimension authoring metadata is wrapper state; native geometry effects are recorded, but physics replay does not reconstruct editable source entities.

Requires Extended mode.

See also: PhysicsShapeSphere, PhysicsShapeCapsule, PhysicsShapeBox, RefreshPhysicsHull, RefreshPhysicsMesh, PhysicsShapeLocalMinX.

Example

; PhysicsShapeRadius Example
; --------------------------
; Requires Extended mode.

Graphics3D 640,480,0,2
SetBuffer BackBuffer()

Const PHYSICS_STATIC=0
Const PHYSICS_DYNAMIC=2

camera=CreateCamera()
PositionEntity camera,0,3,-7
RotateEntity camera,20,0,0

light=CreateLight()
RotateEntity light,45,-30,0
AmbientLight 60,60,60

; An independent Box3D world with standard gravity
world=CreatePhysicsWorld()

; Blue static floor
ground=CreateCube()
ScaleEntity ground,6,0.5,6
PositionEntity ground,0,-0.5,0
EntityColor ground,80,160,255
ground_body=CreatePhysicsBody(world,ground,PHYSICS_STATIC)
ground_shape=PhysicsBodyBox(ground_body,12,1,12)

; An empty pivot carries the body; a child mesh shows its collider
root=CreatePivot()
body=CreatePhysicsBody(world,root,PHYSICS_DYNAMIC)

; Start with a 1 m sphere collider and a ball to show it
diameter#=1
model=CreateSphere(16,root)
ScaleEntity model,0.5,0.5,0.5
EntityColor model,255,120,70
shape=PhysicsBodySphere(body,1)
ResetPhysicsBody body,0,2,0,0,0,0

While Not KeyDown(1)

    ; Space tosses the body, R drops it again
    If KeyHit(57)
        PhysicsBodyImpulse body,0,5,0
        PhysicsBodyAngularImpulse body,0.5,0,0.5
    EndIf
    If KeyHit(19) Then ResetPhysicsBody body,0,2,0,0,0,0

    ; [ and ] resize the sphere; the collider and the ball change together
    change=KeyHit(27)-KeyHit(26)
    If change<>0
        diameter=diameter+change*0.25
        If diameter<0.25 Then diameter=0.25
        PhysicsShapeSphere shape,diameter
        ScaleEntity model,diameter/2,diameter/2,diameter/2
    EndIf
    StepPhysics world,1.0/60.0,4

    ; Arrow keys move the camera
    If KeyDown(200) Then MoveEntity camera,0,0,0.1
    If KeyDown(208) Then MoveEntity camera,0,0,-0.1
    If KeyDown(203) Then TurnEntity camera,0,1,0
    If KeyDown(205) Then TurnEntity camera,0,-1,0

    RenderWorld

    Text 0,0,"Arrow keys: move camera   Space: toss   R: reset   [ / ]: size   Esc: exit"
    Text 0,20,"PhysicsShapeRadius(shape) = "+PhysicsShapeRadius(shape)+" m"
    Text 0,40,"(half the "+diameter+" m diameter)"

    Flip

Wend

FreePhysicsWorld world
End

Index

Blitz3D+ Command Reference

PhysicsShapeRadius# ( shape )

Parameters

Description

Example