Rollercoaster is killing me
I need Help, Script, Plugin or any Suggestions for technical Approach to achieve the following Task:
A Rollercoaster with very chaotic Curves and Loopings(not realistic) , which is building itself (growing / appearing), while a camera is following from the side.
I modelled the Mesh of the Rollercoaster and formed the Track with a Spline.
With the Pathdeform modifier i put the Geometry on the Spline that was easy.
The Camera following the Rollercoaster is also set up and everything is fine
The Problem is i dont know how to make the Rollercoaster "grow" while the camera is flying by its side.
My Approach so far:
1. Slice modifier, following a Dummy that is also running along the Rollercoasters Track. Problem, the Slice Plane has infinite Dimensions and is also Cutting away parts that have already been revealed (especially in Curves) and is very difficult to control
Seems this Method is only suited for straight long Objects with no Curves at all.
2. Black White Gradient as Texture in Opacity Slot, that is animated with a UVW XForm Modifier along the Rollercoaster, Problem: i would need the whole Rollercoaster as one piece of Geometry to give working UV Coordinates. That is not possible because i have to chop the Rollercoaster in many pieces to controll the rotation and orientation of the Rails in the Curves
3. Not tested yet, another Geometry (eg. Cylinder is covering/blocking the whole Rollercoaster like a Tube or Hose and is animated to reveal the Trails as the Camera is moving along. The Material would be a matte shadow that doesnt create an Alpha, so i would get the Alphachannel of the Trails only which i could use as Mask in Compositing. Problem here also, the Tube would block out Pieces of already revealed trails when the Camera is moving in some angles.
I wonder if there is no better Method because i think its more like a basic Task....nothing to crazy ?!?
Just animating the Rollercoaster itself with pathdeform is not the Solution because the Trails should not move itself.
i would really appreciate any kind of help or suggestions an believe me i searched an googled a lot already. Maybe im to Stupid to find the right Script or Tutorial and if you know that "right one" please let me know
Thx alot if you read this far!