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Hi Chris, I have a request. I like to use shape data from Mocha in C4D to create backgrounds for dynamic simulations like fluid etc. Normally the shape data converted to splines is keyframed. 

Is it possible to solve a camera solve from Mocha in MochaBlend and to import shape data where only the camera is moving and the shape data is converted to fixed splines with camera mapping that are not keyframed, thus with a fixed position in space? I hope my question is clearly formulated.

For example, I like to animate a waterfall coming out from a window of a building falling down onto a road below, with keyframed filled splines the waterfall were distorted and not fall down straight just by gravity.

Thanks

Thies

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Asked on April 22, 2016 7:35 am
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Hi Chris, thanks for your quick response.

It is exactly what I have in mind. It sounds like a lot of programming work and I am definitely patient to wait for it. The keyframed motion of the spline needs to be translated into a projection fixed in space, still the changing geometry needs to be animated to match with the background. 

I have been experimenting with a full camera solve in Mocha using several planes and merge the camera data with the rig in MochaBlend. It works fine with Mograph and keyframed animations that can be linked to a null, but fluid or other particle simulations and other dynamics would be influenced by the moving spline, like a bouncing sphere on a floor or a waterfall simulation distorted sidewards when the spline is moving.

I am glad you are working on this option.

By the way, a tutorial on merging a camera solve from Mocha with MochaBlend were nice, I was running in some problems, especially with matching the timeline information etc.

Thanks

Thies

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Answered on April 22, 2016 1:15 pm

You said: ”By the way, a tutorial on merging a camera solve from Mocha with MochaBlend were nice, I was running in some problems, especially with matching the timeline information etc.”
Could you explain this more so I can understand what the problem is?
Thanks

( at April 29, 2016 11:45 am)
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This sounds like a function that was in development before MochaBlend-C4D went on sale.  It didn’t make it into the first-release toolset though due to time constraints.

Let me describe what was being worked on so you can let me know if it is what you have in mind.

When the MochaBlend rig motion is keyframed by either a camera-solve, or by merging it with a camera solve created by C4D, Syntheyes, etc.., any textured splines projected from this moving (translating and rotating) camera-rig will currently move around in 3D space because they are children of the rig.  If the splines were created by roto’ing around a non-transforming object in the video (like a window), then it might be possible to fix the position of the splines in 3D space inside C4D so that the textured spline-geometry is not translating around when viewed from the viewport (outside the rig-camera).

However, because the roto is animated coming from mocha or AE, the splines are still keyframed.  That is the only way to make them match up with the original video;  but if the splines were re-calculated so they were projected upon a non-moving object in C4D, like a Null, then it might be possible to fix their position in 3D space inside C4D.  The spline point-positions would still have to be animated to keep the splines in registration with the video when viewed through the rig-camera though.

If this system works, it would create the illusion that the splines are not parented to the rig.  In effect, you would have animated splines that wouldn’t float around as the rig moves around.  To really make it work, depending on your shot, it may require more than a MochaBlend-C4D single plane solve because that only solves for the location of the tracked plane, not the location of the roto that would be projected into 3D space; it may require a full camera-track solve by C4D, SynthEyes, etc…, in that case you would use one of those solvers, then use the ‘Merge Rig’ button, and finally project your roto upon a fixed object (Null) in your C4D scene.

If this is what you have in mind, then you aren’t the first person to request this.  I thought it might be useful, and it looks like other people due too.

What do you think?

 

Chris

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Answered on April 22, 2016 12:44 pm
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