This is a second option for scene transitions during a SketchyPhysics simulation. Again, I wanted to produce a video clip to use as the title/branding of a video we produced. An example is found in the first 35 seconds of the embedded video on my website: http://pltw.nmsu.edu/cPage.aspx?pageid=event&queryid=110419
In this simulation, I used a Photo Match to guide me in modeling a clock tower that is an iconic feature of the College of Engineering. I particularly wanted to convey the transition of ideas from the familiar (clock face with moving hands) to the esoteric (Vertical Wind Turbine) and finally the concrete (Clock tower in the courtyard). After roughly modeling the tower, I added the clock face and hands, as well as the turbine. One clock hand and the turbine itself were attached to motors, making them spin.
Created one scene where the clock face is centered in the frame, and the face fills the frame. Created a second scene where the lower face and axis of the turbine is centered and fills the scene. These have some equivalency to convey the idea of relatedness. Finally, I used the Photo Match scene to superimpose the model and the photo.
After starting CamStudio video screen recorder, I centered on the clock face scene and started the simulation. I recorded the clock face simulation, then stopped and moved to the turbine scene. Restart the simulation to record the turbine scene, using X-ray surfaces. I then clicked on the Photo Match scene tab. Since the simulation is still running, the scene transition ran only one frame, then stopped, but the simulation is still running. I rapidly and repeatedly clicked the Photo Match scene tab to move the scene transition a frame at a time. When the transition was done, I recorded for some more seconds, then ended the simulation and recording.
Using Adobe Premier, I imported the captured video and edited it, using cross-fade transitions between the first two scenes. The final transition to the photo match scene seemed to slow down asymptotically as I was clicking the scene tab, so I needed to accelerate the framerate of the scene transition to make it appear more even.
This is a rather crude way to achieve simultaneous scene transition with physics simulation, but it worked for this clip.