action move

[Master chief]

ok i have an action that im tring to make where a fan blade turns 90 degrees , its a 4 bladed fan and its going pretty fast , i need to know if there is some way to make sure that it dose not monentaraly stop when repeting

[robcat2075]

ok i have an action that im tring to make where a fan blade turns 90 degrees , its a 4 bladed fan and its going pretty fast , i need to know if there is some way to make sure that it dose not monentaraly stop when repeting

 

lets say your cycle is 0-20 frames long.

 

make sure 0 and 20 are keyframed the same

 

adjust the crop range of the action (look in the properties window after you put it in the chor) to only play 0-19

[John Bigboote]

This keeps coming up. There is a drop-dead easy solution, but on the surface it appears difficult, so nobody ever wants to try it. When a bone rotates on it's 'roll handle' axis, or ANY rotation in 3D animation for that matter- there are different ways of approaching the math of the spin. By default, a bone is set to be rotated by 'QUATERNIAN' mathematics... it 'sounds' like a deep term, but the root is 'QUARTER'... and a quarter of a spin is 90degrees...right? this works great for most simple bone rotations, but for something that goes 'round-n-round...like a FAN BLADE or a WHEEL... you need to approach the 'math' of the spin a little differently.

 

SIMPLE: Adjust the roll-handle of the bone a little bit...just enough so that AM knows you are referring to that aspect of it. NOW, go to your PROPERTIES window and right-click on the ROTATE header and you will see some menus pop up...there should be one that says. "CHANGE DRIVER TO" and you simply change over from 'quaternion' mathematics to 'EULER' mathematics. Was that hard? No. Now, you will be able to spin that bone OVER-N-OVER-N-OVERAGAIN until the cows come home and the program knows what you are askin for... REPETITION.

 

All these solutions with poses and actions and what-nots are very clever, but I guarantee if you look closely at your spin you will see a 'hitch' eventually, and oh, want to do an ease-in or out... good luck.

 

SWITCH TO EULER. There's more about this in the manual.