The edge design workflow is based on an idea from
@Cratty (
detailed in his Cratty House Poker thread, thank you very much!) modified a little bit to use Photoshop's ruler.
I work in Photoshop in a CMYK 16bit document with 1333,826 pixels/inches. That way a 39mm chip is 2048*2048 pixels.
1. Import a template for drawing the spots, set it at 25% opacity, draw the spots free handed with the Brush tool with 50% smoothing:
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2. Create colored spots with layer masks based on what has been drawn. Notice I drew the spots outside of the chip, and have a mask for the whole chip:
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3. Add 2 guides to be able to snap to the chip center and top center:
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4. Open Measurement Log Window, create a "Select Data Point" preset to only have Label & Angle ; this make it easier to read:
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5. Bring up the Ruler tool. Place from top center to center, it snaps easily thanks to the guide. Press ALT to bring up angle measurement and loosely place at first spot:
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6. Adjust placement at 5000% zoom:
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7. Hit "Record Measurement" in the Measurement Log:
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8. Move the ruler point from the top center to the 2nd spot location. Zoom. Adjust. Record Measurement. Alternate the ruler point you move for each spots, so that there's always a ruler point in common between two consecutive measurements.
9. Finish snapped at the top center, and measure that too. It will help detect errors. At the end, the Measurement Logs have all the unnecessary "Feature 1" & "Feature 2" entries.
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9. Delete the unnecessary entries:
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10. Select and export them to a text file:
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11. Import the values in Excell, add formulas to calculate the arc lengths and positions of each spots. I add colors to avoid errors. I also sum everything to make sure that all my angles add up to 360° and all the arcs add up to 122,5221135:
12. Create a PSD document with the same inches/pixels resolution, and draw all the boxes with the previous excel file:
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12a. Note this is really to do with the Free Transform tool (set the origin in the top left corner, set the X position and With in millimeters):
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13. Tweak the layer masks with the Brush Tool:
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14. I will probably add a 1px or 2px blur to both the chip face and the edge, but haven't done that yet.