Image to Pattern
1. Open new file, Rhino should prompt you to select units.
Open a “Small Objects Inches” file.
2. In the top view draw a two point surface large enough to
work with. Right click on the top and click maximize (page 1-4)
3. Open Grasshopper my typing it in the command line. (page
5)
4. Double click in the Grasshopper window and type “surface”
in the prompt, and select the surface icon. (page 6)
5. Double click in the Grasshopper window and type “divide
surface” in the prompt, and select the divid surface icon. (page 7)
5. Double click in the Grasshopper window and type “number
slider” in the prompt, and select the number slider icon. (page 8)
6. Right click on the number slider and click slider type
and integers. (page 9)
7. Right click on the number slider and click values, change
the maximum to 100 and click the green check. (page 10)
8. Select the number slider and press “Ctrl+C” and “Ctrl+V”
to copy and paste. Now slowly move your
mouse over the various icon and they will tell you information you’ll need to
know. Click on the right end of the
surface icon and plug it into the S of the divide surface icon. Now click on
the right end of the one of the number sliders and plug it in to the U, plug
the other into the V. (page 11)
9. Double click in the Grasshopper window and type “image
sampler” in the prompt, and select the image sampler icon. (page 12)
10. Click on the UV of the divide surface icon and plug it
into the image sampler. Right click on the image sampler and click on settings.
(page 13)
11. In the image sampler settings notice that the image UV
will be read from 0 to 1.0. Click brightness, and load your image. (page 14-15)
12. Right click on the surface icon, and select
“parameterize”. Now Grasshopper will read the surface UV from 0 to 1.0. (page
16)
13. Double click in the Grasshopper window and type “circle”
in the prompt, and select the circle icon that indicate it’s created with a
base plane and radius. (page 17)
14. Right click on the surface icon and select “set one
surface”. Select the surface you originally drew. (page 18)
15. You should now see circles of various sizes based on the
brightness reading of your image. (page 19)
16. Double click in the Grasshopper window and type
“division” in the prompt, and select the division icon. Plug the UV out of the
image sampler into the division icon.
Copy and paste a number sider and plug it into the division icon. (You
may also want to try the multiplication icon)
(page 20)
17. Right click on the number slider and click slider type
and floating points. Adjust the number
and see the radius of the circles change.
(page 21)
18. Because the size of the surface may be too small for the
radius of the circles to articulate the pattern from the image, select the surface
and scale the surface up. (page 22-23)
19. Select all the icons except for the circle icon, right
click and turn the preview off. Adjust the number sliders to see how the
pattern adjusts. (page 24-25)
20. Right click on the circle icon and click bake. Select the
layer you want to bake the circle pattern.
(page 26-27)
21. Select all the circles at once and go to file, export
selected, save the file as an Illustrator file. (page 28-30)
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