DataForge
08-24-2005, 08:11 PM
OK although I am doing something a little more complicated it can be reproduced by simply creating a cone and a locator, aim constraining the cube to the locator in only the Y axis (Actually it can be seen if done in all axis as well). It all works fine as long as the locators transform Y stays at 0 or below, but once it is greater than zero then it will not follow the locator when it is moved behind, it then flips and follows in a reverse direction. WTF???
OK, so I read the cryptic help section on history dependencies, up vectors, yada yada and started playing with different settings and the closest I can get is by setting the constraint up vector to the locators rotation and then I can get some very unpredictable results by rotating the locator when the locator moves behind my object. It can’t be this hard, I have to be missing something totally obvious, please help me understand before I go insane :)
And if you are interested in exactly what I am trying to do: I have a mech that has a cannon that pitches in the x direction. This is parented to a base that yaws in Y. So I set up two aim constraints (one in x and the other in Y on each object group) so that it follows the locator without rotating in z. Sounds simple until you move the locator behind the mech and it pops to the front. Any help in understanding aim constraints would be very much appreciated.
OK, so I read the cryptic help section on history dependencies, up vectors, yada yada and started playing with different settings and the closest I can get is by setting the constraint up vector to the locators rotation and then I can get some very unpredictable results by rotating the locator when the locator moves behind my object. It can’t be this hard, I have to be missing something totally obvious, please help me understand before I go insane :)
And if you are interested in exactly what I am trying to do: I have a mech that has a cannon that pitches in the x direction. This is parented to a base that yaws in Y. So I set up two aim constraints (one in x and the other in Y on each object group) so that it follows the locator without rotating in z. Sounds simple until you move the locator behind the mech and it pops to the front. Any help in understanding aim constraints would be very much appreciated.