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Howto:Animate gear scissors using the tracking animation: Difference between revisions
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Howto:Animate gear scissors using the tracking animation (view source)
Revision as of 15:09, 8 May 2013
, 8 May 2013Images slave object/scissor/ik
(http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg40042.html) |
(Images slave object/scissor/ik) |
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There are (currently) only two axes required. The lock-axis and the track-axis. They should be orthogonal, as the rotation is only possible round the lock-axis. Internally the track-axis is always orthonormalized to the lock-axis, as calculations always are performed in the plane normal to the lock-axis. | There are (currently) only two axes required. The lock-axis and the track-axis. They should be orthogonal, as the rotation is only possible round the lock-axis. Internally the track-axis is always orthonormalized to the lock-axis, as calculations always are performed in the plane normal to the lock-axis. | ||
<gallery widths=200> | <gallery widths=200 heights=200> | ||
File:Tracking animation (locked-track initial pose).png|Initial pose | File:Tracking animation (locked-track initial pose).png|Initial pose | ||
File:Tracking animation (locked-track target moved).png|The target has moved and the '''locked-track''' animation ensures the object still points at the target (with the '''track-axis''') | File:Tracking animation (locked-track target moved).png|The target has moved and the '''locked-track''' animation ensures the object still points at the target (with the '''track-axis''') | ||
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The '''slave-center''' specifies the location of the revolute joint. Optionally an object can be specified using '''slave-name''', which will be attached to the animated object and also tracks to the target object. | The '''slave-center''' specifies the location of the revolute joint. Optionally an object can be specified using '''slave-name''', which will be attached to the animated object and also tracks to the target object. | ||
<gallery widths=320 heights=256> | |||
File:Tracking animation with slave object.png|Initial pose | |||
File:Tracking animation with slave object (scissor, inverse kinematics).png|The target has moved and the '''locked-track''' animation ensures the '''track-axis''' still points at the target. The '''object''' and the '''slave-object''' are rotated such that the available space is exactly filled (aka scissor animation). | |||
</gallery> | |||
== Examples == | == Examples == | ||