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Part 1: Image processing, Panel embossing, and User Control

Creating UV grid & Flipping variations

For part 1, I selected Stanford’s very own OYYO art installment to superimpose on my closed panels. Beginning with the dark blue box in the middle of the workspace, I defined a UV grid and attached seamless panel family types to the “ribs” of the bridge structure.

I then associated the UV grid with the pixel grid of my imported image and made necessary adjustments to the flipping options to account for the fact that the ordering of the UV grid resulted in some upside down “standard” displays. The various options can be browsed within and pulled from the four item new list. These pixel arrangements were then applied to the panels at their nodes with the Element.OverrideColorInView node.

Derive Brightness at Panel locations and Emboss/Deboss

Next, the pixels’ brightness information was pulled from the image file and applied to a list (which allowed for an easy Boolean-like switch between an embossing and debossing panel effect). This was accomplished by setting the new height parameters by their called heights.

*NOTE: the Green “Embossing direction” group was only applied to the close side because the mirror-like arrangement of the bridge was not intended to mirror surface attachments as well. See how the steel 3-pt tubes in Assignment 3 are on opposite sides of the bridge walls because they are still subject to the same x, y, and z-axes & directions.

The following images were taken before the Color.Brightness remapping range (and the associated height range) was reduced from [1,4] to [1,2]. Therefore, these captured results primarily demonstrate very accentuated debossing and embossing effects on the panels.

The following 50x50 model is much cleaner than the above representations, both due to the larger UV grid as well as the reduced panel height scaling.

Part 2: Sun directness, variable Panel heights & colors

To identify how directly each panel was facing the sun, a dot product was computed between a vector normal to each panel and a separate vector from the panel centerpoint to the sun at its specified location. For each end of the bridge (both near and far) this directness was expressed as a number between 0.01 and 1. This was associated with a color value on the purple-yellow range [0,1] where panels were colored purple if their vectors were near perpendicular and yellow if their vectors were near parallel.

Regarding the height embossing, the directness for each end of the bridge was also multiplied by an adjustable height scalar, and this would beget a new value with which I redefined each panel’s height.