Applying color conditionally

Replies to This Discussion

Permalink Reply by David Rutten on September 1, 2009 at 3:51pm

Hi Sameer,

you could map the angle onto a Gradient object, then use the gradient output colour to control the diffuse channel of objects in the [Custom Preview].

Permalink Reply by Sameer Kumar on September 1, 2009 at 4:07pm

Is this what you mean? (image attached). I am not sure if the result is what I was expecting... how do I better control an even spread of the gradient?
Thanks David.

Attachments:

• panelanalysis2.jpg, 149 KB

Permalink Reply by Luis Fraguada on September 1, 2009 at 4:26pm

A way that uses less components (though your setup would do the same thing) is to use a Scalar > Interval > Bounds on the list of data to get the min and max of tht list...use a Scalar > Interval > Interval components to get the Min and Max ... for me its an easier way to do it, over the list item route...

Now that answers absolutely nothing regarding your situation because its more about the data coming in and its visualization. I would need to know the list of data before I can comment further...downloading now...

Permalink Reply by Luis Fraguada on September 1, 2009 at 4:43pm

Since I do not have your definition with the gradient, I cannot see what went wrong...I am sending the definition I tried out and an image showing the result...hope it helps.
luis

Attachments:

• gradientPanel.jpg, 148 KB
• panelanalysis2_edited.ghx, 283 KB

Permalink Reply by Sameer Kumar on September 1, 2009 at 4:59pm

This is great, thank you.
With my previous setup using list items, I was able to get a better gradient after sorting the list. I wonder why this method does not need sorting.

To take this further, is it possible for me to divide the interval into say 5 divisions and assign a different color to each group? In other words, I want to categorize the panels based on an interval of angles. I don't really want a gradient.

Thanks again.

Permalink Reply by Sameer Kumar on September 1, 2009 at 5:14pm

I tried it out by using the gradient tool but not as a gradient. I feel that there must be a more elegant way of doing this.

Moreover, I seem to be getting only a part of it right... the third interval (yellow) seems to completely cover everything...

Any ideas?

Attachments:

• panelanalysis2.ghx, 442 KB

Permalink Reply by Luis Fraguada on September 1, 2009 at 5:55pm

Here are two options, note the second option will be limited to the number of divisions you want...the number of groups...

The first option is easy. If you look at the zebra option David has in the gradient component, you could divide it up graphically...

The second option is kind of not so elegant, and I am sure others could redo it in a better way...essentially sorts, subdivides the list into 5 groups, and then uses the tree branch to split them out in order to color them...being that its time to quit for the evening, I am sure there are better ways of going about it ;)

Attachments:

• panelanalysis2_edited_again.ghx, 568 KB
• gradientPanel2.jpg, 153 KB

Permalink Reply by Sameer Kumar on September 1, 2009 at 7:04pm

Thanks again. Very helpful.

I have just realized that these colors that I generate by gradient cannot be baked! I was thinking of using Giulio Piacentino's tools to bake the geometry with the color... but the custom preview does not have any output! That is a huge disappointment :(

Any suggestions how I can bake these colors?

Permalink Reply by Luis Fraguada on September 2, 2009 at 1:09am

the colors you need are from the gradient or color swatches...custom preview just paints the geometry with color...

Permalink Reply by Suryansh Chandra on September 2, 2009 at 5:08am

You could still use Giulio's component. It needs to be given the geometry, and a corresponding color value for each (just like the preview component) and it would bake it for you. It just wont be a preview.

Permalink Reply by Sameer Kumar on September 2, 2009 at 8:51am

Of course. I am all set... Thank you all; this has been extremely helpful.

Permalink Reply by Andrew Lyon on September 10, 2009 at 12:27pm

Just curious about structuring a dithered color instead of a smooth gradient. I've been using the graph mapper and settig my domain and list values to be concurrent. any ideas about how to get a smooth dither with using a point for distance?


-andrew