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shape - live physics shape handle point - capsule endpoint 1 or 2 |
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Returns the body-local Z coordinate of capsule endpoint point, in metres. point must be 1 or 2. These are the centres of the two hemispherical ends, excluding the radius; they retain the supplied endpoint ordering. Coincident endpoints are allowed. Wrong shape kinds and endpoint indices 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. See also: PhysicsShapeSphere, PhysicsShapeCapsule, PhysicsShapeBox, RefreshPhysicsHull, RefreshPhysicsMesh, PhysicsShapeRadius. |
; PhysicsCapsulePointZ Example
; ----------------------------
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)
; A capsule: a cylinder with a ball on each end
half#=0.5
model=CreateCylinder(16,True,root)
EntityColor model,255,120,70
cap_a=CreateSphere(16,root)
cap_b=CreateSphere(16,root)
EntityColor cap_a,255,120,70
EntityColor cap_b,255,120,70
ScaleEntity cap_a,0.4,0.4,0.4
ScaleEntity cap_b,0.4,0.4,0.4
ScaleEntity model,0.4,half,0.4
PositionEntity cap_a,0,-half,0
PositionEntity cap_b,0,half,0
; A 1.8 m capsule: a 1 m segment plus the 0.8 m diameter
shape=PhysicsBodyCapsule(body,0.8,1.8)
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 ] lengthen or shorten the capsule between its two end points
change=KeyHit(27)-KeyHit(26)
If change<>0
half=half+change*0.25
If half<0 Then half=0
PhysicsShapeCapsule shape,0.8,0,-half,0,0,half,0
ScaleEntity model,0.4,half,0.4
PositionEntity cap_a,0,-half,0
PositionEntity cap_b,0,half,0
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 [ / ]: length Esc: exit"
Text 0,20,"PhysicsCapsulePointZ(shape,1) = "+PhysicsCapsulePointZ(shape,1)+" (,2) = "+PhysicsCapsulePointZ(shape,2)
Text 0,40,"(Y "+PhysicsCapsulePointY(shape,1)+" and "+PhysicsCapsulePointY(shape,2)+")"
Flip
Wend
FreePhysicsWorld world
End