latest version question

Hi, everyone.
How to use imagesampler ?Is there some example before the tutorial publiced?

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Permalink Reply by Danny Boyes on August 4, 2009 at 4:18am

From what I can figure out, you need to supply points on the left in a range of 0 to 1 representing your chosen images edge length for example: the middle point of your image is point (0.5,0.5,0). This is still the case if the aspect ratio of the image is not 1.

The output of this (by default) is the RGB colour values at the supplied point.

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Permalink Reply by David Rutten on August 6, 2009 at 8:08am

You can drag+drop an image file directly onto the Grasshopper canvas to instantiate a new Image Sampler. Or you can drag it from the toolbar, then double click the control to open up the options.

You can adjust the physical range of the image, and also the output types (colour, red, green, blue, alpha, hue, saturation, brightness).

Double click on the ImageSampler icon in the toolbar to display the help-topic for this object.

--
David

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Permalink Reply by Taylor on August 6, 2009 at 8:20pm

Thank you, there are some amazing tools in new version, u r awesome~I want to find some creative way to use these componets, now I only found we could use this one to change the landform picture to 3dmodel. Is there anything else?

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Permalink Reply by Vicente Soler on August 4, 2009 at 6:07am

Here's an example of a simple nurbs heightfield using the image sampler component:

The image sampler is set to ouput the brightness values and clamped, the rest is set to its default values. The input surface is reparametrized.

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Permalink Reply by Taylor on August 5, 2009 at 8:29am

Thank you for your help~ only one problem, The SrfGrid component, last one, aways turns to red, I do the same as your defination, could you tell me why ?

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Permalink Reply by Vicente Soler on August 5, 2009 at 8:49am

If you divide a segment in 200 parts, you end up with 201 points. Add "u+1" into the expression editor of the U input.

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Permalink Reply by Taylor on August 6, 2009 at 7:58pm

thank you very much~

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Permalink Reply by maysam on September 15, 2009 at 8:35pm

Hi Vicente
Thank you for definition,
Would u please tell me how can I adjust the amount of the extrusion? In case you want to extrude more
thanks

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Permalink Reply by Vicente Soler on September 15, 2009 at 11:41pm

Add a multiply component between the image and the vector amplitude component. The image should output a number between 0 and 1 so the other number being multiplied should be the maximum desired height of the transformation.