[PB 5.31] NodeAnimation rotation
Posted: Tue Dec 09, 2014 9:36 am
Hi,
The "SetNodeAnimationKeyFrameRotation" command seems to yield erratic results when the rotation parameters are superior or equal to 180°.
In the sample code below, there's two "nodes", without movement, used to rotate a cube 180°. I thought the cube would progressively rotate to reach a 180° angle at the animation's end.
But the cube rotates 20°, goes back to zero, then rotates again until 160° before abruptly going -180° at the end...
NB: NB: The code works as intended if the rotation parameters stay between -179.99° and 179.99°.
Typical log:
The "SetNodeAnimationKeyFrameRotation" command seems to yield erratic results when the rotation parameters are superior or equal to 180°.
In the sample code below, there's two "nodes", without movement, used to rotate a cube 180°. I thought the cube would progressively rotate to reach a 180° angle at the animation's end.
But the cube rotates 20°, goes back to zero, then rotates again until 160° before abruptly going -180° at the end...
NB: NB: The code works as intended if the rotation parameters stay between -179.99° and 179.99°.
Code: Select all
;- Init
InitEngine3D()
InitSprite()
InitKeyboard()
;- Window & screen
OpenWindow(0,0,0,800,600,"NodeAnimation Rotation")
OpenWindowedScreen(WindowID(0),0,0,800,600,0, 0, 0,#PB_Screen_SmartSynchronization)
;- Camera
CreateCamera(0,0,0,100,100)
MoveCamera(0,0,0,10)
;- Node and cube creation
CreateNode(0)
cubeEntity = CreateEntity(#PB_Any,MeshID(CreateCube(#PB_Any,1)),#PB_Material_None)
AttachNodeObject(0,EntityID(cubeEntity))
;- Animation: 2 nodes
duration = 5000
NodeAnimation = CreateNodeAnimation(#PB_Any, NodeID(0), duration, #PB_NodeAnimation_Spline, #PB_NodeAnimation_LinearRotation)
CreateNodeAnimationKeyFrame(NodeAnimation, 0, 0, 0, 0); key 0
CreateNodeAnimationKeyFrame(NodeAnimation, duration, 0, 0, 0); key 1
;- Set rotation for the 2nd node
SetNodeAnimationKeyFrameRotation(NodeAnimation,1,0,0,180)
;- Main loop
StartNodeAnimation(NodeAnimation,#PB_NodeAnimation_Once)
Repeat
AddNodeAnimationTime(NodeAnimation, TimeSinceLastFrame)
;- Display animation progression and rotation
totalTime + TimeSinceLastFrame
Debug "Node animation = " + LSet(StrF(100 * totalTime / duration,2),7) + "% : roll = " + StrF(NodeRoll(0),2)
TimeSinceLastFrame = RenderWorld()
FlipBuffers()
ExamineKeyboard()
Until KeyboardPushed(#PB_Key_Escape) Or NodeAnimationStatus(NodeAnimation) = #PB_NodeAnimation_Stopped
Code: Select all
Node animation = 0.00 % : roll = 0.00
Node animation = 1.00 % : roll = 0.00
Node animation = 1.50 % : roll = 2.60
Node animation = 3.10 % : roll = 3.83
Node animation = 4.80 % : roll = 7.45
Node animation = 6.40 % : roll = 10.78
Node animation = 8.10 % : roll = 13.46
Node animation = 9.80 % : roll = 15.85
Node animation = 11.40 % : roll = 17.80
Node animation = 13.10 % : roll = 19.25
Node animation = 14.80 % : roll = 20.40
Node animation = 16.50 % : roll = 21.19
Node animation = 18.10 % : roll = 21.64
Node animation = 19.80 % : roll = 21.77
Node animation = 21.50 % : roll = 21.63
Node animation = 23.10 % : roll = 21.23
Node animation = 24.80 % : roll = 20.64
Node animation = 26.50 % : roll = 19.80
Node animation = 28.10 % : roll = 18.78
Node animation = 29.80 % : roll = 17.67
Node animation = 31.50 % : roll = 16.36
Node animation = 33.20 % : roll = 14.95
Node animation = 34.80 % : roll = 13.45
Node animation = 36.50 % : roll = 12.00
Node animation = 38.20 % : roll = 10.42
Node animation = 39.80 % : roll = 8.84
Node animation = 41.50 % : roll = 7.38
Node animation = 43.20 % : roll = 5.87
Node animation = 44.90 % : roll = 4.44
Node animation = 46.50 % : roll = 3.11
Node animation = 48.20 % : roll = 1.98
Node animation = 49.80 % : roll = 0.92
Node animation = 51.50 % : roll = 0.09
Node animation = 53.20 % : roll = -0.59
Node animation = 54.90 % : roll = -1.04
Node animation = 56.50 % : roll = -1.23
Node animation = 58.20 % : roll = -1.16
Node animation = 59.90 % : roll = -0.77
Node animation = 61.50 % : roll = -0.05
Node animation = 63.20 % : roll = 0.95
Node animation = 64.90 % : roll = 2.40
Node animation = 66.60 % : roll = 4.26
Node animation = 68.20 % : roll = 6.57
Node animation = 69.90 % : roll = 9.16
Node animation = 71.60 % : roll = 12.39
Node animation = 73.30 % : roll = 16.15
Node animation = 74.90 % : roll = 20.44
Node animation = 76.60 % : roll = 25.01
Node animation = 78.30 % : roll = 30.44
Node animation = 79.90 % : roll = 36.50
Node animation = 81.60 % : roll = 42.79
Node animation = 83.30 % : roll = 50.13
Node animation = 84.90 % : roll = 58.17
Node animation = 86.60 % : roll = 66.40
Node animation = 88.30 % : roll = 75.88
Node animation = 89.90 % : roll = 86.14
Node animation = 91.60 % : roll = 161.69
Node animation = 93.30 % : roll = -140.83
Node animation = 95.00 % : roll = -148.91
Node animation = 96.60 % : roll = -156.94
Node animation = 98.30 % : roll = -164.42
Node animation = 100.00 % : roll = -172.28