Instances at a Glance
Rotate to Vector and Color
In addition to scale, and rotation, we may also want to include color. We can do this manually in a similar fashion to our other approaches - where we pack the relevant information into CHOPs which are then targeted on our geometry COMP.
Similar to the previous approach, we’ll set up our geometry instances to have position and rotation that’s defined by a reference SOP.
Next we create a noise TOP whose x resolution is equal to the number of points in our reference SOP. We can do this with a simple expression like op( 'null1' ).numPoints - where null1 is a null attached to our SOP. Here we’ve adjusted the noise TOP so that there are many distinct colors so the effect is easier to see. In this example we then convert the TOP to a CHOP, and pack the color information in with the rest of our instancing data. On the geometry COMPs Instance 2 page we can assign the r, g, b, and a channels to be the color information for our instances.
By using the buttons below, you can see how a noise TOP maps onto the instances, or how a Ramp TOP maps onto the same instances.
Tested in TouchDesigner099 2020.23680
Updated 06.03.20
Matthew Ragan
Zoe Sandoval