Copy Location Constraint#
The Copy Location constraint forces its owner to have the same location as its target.
重要
Note that if you use such a constraint on a connected bone, it will have no effect, as it is the parent's tip which controls the position of your owner bone's root.
Options(オプション)#
Copy Location panel.#
- Target(ターゲット)
データ ID used to select the constraints target, and is not functional (red state) when it has none. See common constraint properties for more information.
- Axis(座標軸)
These buttons control which axes are constrained.
- Invert(反転)
Invert their respective corresponding axis coordinates.
- Offset(オフセット)
When enabled, this control allows the owner to be moved (using its current transform properties), relative to its target's position.
- Target/Owner
Standard conversion between spaces. See common constraint properties for more information.
- Influence(影響)
Controls the percentage of affect the constraint has on the object. See common constraint properties for more information.
例#
Animation(アニメーション)#
Let us animate a solar system with the Copy Location constraint and its Offset option. You can make the owner, called "moon", describe perfect circles centered on the world origin (using e.g. Location X/Y sine and cosine F-Curves, see Built-in Function(組込関数) モディファイアー). Then copy the location of a target "earth" with the Offset checkbox enabled to model a satellite in a (simplified) orbit around its planet. Repeat these steps for more planets circling around its center star "sun".
Following video is a small animation of a solar system created using (among a few others) the previously described technique:
Note that, this 'solar' system is not realistic at all (the wrong scale, the earth is rotating in the wrong direction around the sun, ...).
You can download the blend-file used to create this animation.
Furthermore you can also animate a few properties of each constraint using animation curves: e.g. you can animate the Influence of a constraint. It is used to first let the camera follow the moon, then the earth, and finally using two Copy Location constraints with Offset set.