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Lightcycle Notes
Matthew Hagerty, Jun 2006 (http://digitalstratum.com)
For commercial use, anything TRON is probably copyright Walt Disney Pictures.

Main TRON Page

Original MAGI Lightcycle - Perspective Rendering

All available original MAGI renderings have perspective which makes them a little tricky to determine exact size and placement of the geometry making up the lightcycle. There were several versions of the lightcycle with subtle differences, the one shown here I believe to be the model used in final production.

Clip from the Movie TRON

The fender and rear of the lightcycle is one of the hardest parts to discern from the available images. This clip helps figure out some of the rear geometry.

Notes

  1. Canopy Shoulder. The shoulder is tricky because it appears to change depending on the angle of the lightcycle, the lighting, etc.. At times the shoulder appears to be flat and perpendicular to the canopy (look closely at the second image's shoulder geometry), and only rounding at the very edge. Other images show it as rounded. The geometry used to make this part of the lightcycle is a torus, and in the first image it can also be seen that the placement of the shoulder torus is such that it does not intersect the canopy at zero degrees to the torus's profile circle. Rather the torus is set out from the canopy slightly and creates a more rounded look.

  2. While hard to see, shows the shoulder torus is rounded and that it is set out from the canopy slightly instead of intersecting the torus perfectly in the middle.

  3. Some images look as if the wings are higher up and may actually touch the shoulder torus. This shows that they are in fact set lower and intersect the side of the canopy and not the shoulder. Also note that the wings are made from a single ellipse.

  4. The transmission and "light jet" features are cones. Other models have used ellipses to create these parts, but if you look closely at them, they are not symmetrical and have more of a curvature on the bottom than the top. This could only be accomplished with a cone that does not have its point directly over the base center-point.

  5. Related to #4, it is possible to achieve the asymmetrical curvature by squashing an ellipse more on one side than the other, but it can be clearly seen here in #5 that the profile of the features are straight, which you would not have if an ellipse was used.

  6. The fender is a cylinder which has been sheered to achieve the angle. The way the canopy comes down and intersects the fender would not be possible if the fender was another shape.

  7. Another detail indicating the fender is a cylinder. It can be clearly seen in the lower image.

  8. Shows the small error where the end trim sphere joins the shoulder torus. Also seen here is the cylindrical shape of the wheel-well.

  9. It took me a long time to figure out what that part was between the rear wheel and the chassis wall. The part that looks circular on the top. This is actually the proof that the wheel-well is cut with a cylinder, and the circular shape is where the cutting cylinder cuts the lower chassis, but is bisected with the polygon that makes up the other part of the wheel-well cutter. Look at the assembly detail page to see how the geometry interacts here.

  10. Shows exactly how deep the wheel-well polygon cutter goes. Note that due to the perspective that the rear wheel looks as if it does not fit in the wheel-well without intersecting the chassis. This is not the case, the wheel-well opening is large enough for the rear wheel.