With follow path activated, speed is constant, how can i make it vary with time (constant acceleration), or relative to distance to an object (like a zoom on earth, really fast when on the moon, but at 100m from ground slowly and then in grass like 1 cm/s ?
when inserting keyframes for the camera after the follow path is finished (say follow path last 100 frames, i put a keyframe at 110), it makes the whole camera movement a mix of
-the linear movement between keyframe 1 and keyframe 110
-and the follow path movement.
How can i ensure the camera first exactly follow the path, and the when path is done, start the linear movement to the next keyframe ?
Note that i can’t save a key frame of the final location of the curve follow, because i modify the curve in my workflow, and moving the camera to the new endpoint and adding a new keyframe for every curve that i modify is really too much time consuming.
Thanks for your answer,
I’m by a friend which doesn’t has blender. But easy 3 steps to reproduce :
add curve, parent cam to it,
move cam to the begining of the blue line joining the curve and the cam in viewport. Move in time line, the cam will exactly follow the curve.
Now add a keyframe at frame 110 with the cam far away from curve. You will see the camera doesn’t exactly follow the curve anymore but will start to move to the new 110 keyframe.
To control speed keyframe the curve / path animation evaluation time
I got that message then : “F-curve with path= … cannot be keyframed, ensure that it is not locked or sampled. Or try removing f-modifiers”
I have no modifiers on that curve … and nothing is locked.
I’m by a friend which doesn’t has blender.
When you have access to blender or your friend downloads it post a blend file.
But easy 3 steps to reproduce
That’s your job, and even your first step is misleading.
I got that message then : “F-curve with path= … cannot be keyframed, ensure that it is not locked or sampled. Or try removing f-modifiers”
‘Try removing modifiers’ is the key statement. In graph editor press N for properties panel and remove the modifier or Don’t use parenting, add the follow path constraint and keyframe evaluation time.
here the blend file. I want the cam first exactly follow the circle. Then start moving to next keyframe location. Keyframing last location on circle is not an option as i want to modify the circle regulary, and then the last location will change as well. And with 50+ curves that i regulary adapt to scene changes, it is way to much time consuming…cam animation problem.blend (77.8 KB)
Actually, I choosed the circle because it shows my problem clearly, but i use bezier curves that aren’t cyclic most of the time, so the end point isn’t the first point.
You mean one curve ? because i already use curves. The point is i make several curves for several different videos and also some still images (thus the keyframes). And i would like the camera to exactly follow each curve, then follow the keyframes. But not do a mix of all the curve path and the movement to the first keyframe location.