Fill an object with parallel lines that are equidistant from each other

[Sigy5EE4]

Objective: to fill a whole figure, divided into different shapes, with lines. Each surface has different colors. Despite the different sizes of the subplanes, the lines should be equally spaced.

When I work via object I cannot remove the lines that are outside my object with pathfinder. There is also a setting that makes bruches, but I am not currently getting the exact result I want there either

Thank you very much for the help.

Below you can see a preview of the result I want to get. credits to the artist Send Brassai.

[Sigy5EE4]

So it's not just straight lines that I want to use. I also want to have curved lines like you can see in the image of the artist on the neck and chest.

[Doug A Roberts]

As an example: Make a pattern swatch that consists of a rectangle the same colour as the strokes you ultimately want to use in your drawing, and a no stroke/fill rectangle. Drag them (as one) to the swatches panel:

Draw your face (or whatever). In this example I made it a live paint group after completing the linework, added the base colours, then expanded the live paint group:

Then you can add the pattern swatch as a second fill on those shapes that require it, and rotate the fill as needed (in the transform panel, select 'transform pattern only', or hold the ~ or ¬ keys --depending on your system while using the rotate tool).

[Ton Frederiks]

You can use Pattern fills and use an additional color fill below them with the Appearance panel.

Curved lines can be clipped with a Clipping Mask.

A script that cuts paths may help too, see:

https://github.com/creold/illustrator-scripts/blob/master/md/Path.md

[Sigy5EE4]

My goal with my previous question is to fill up the dragon Spryo. The horn should be in triangles like this, the wings should follow the pattern of the spacers.How do I create those corners?

I work with windows. How do you rotate the elements. You explained in your previous post, but I'm not fully following.

Thank you very much!

[Doug A Roberts]

So there is a lot more going on there than just filling shapes with parallel lines, enough that a case could probably made for simply drawing the lines -- because you'd need different approaches for each of those specific situations.

Here's an example of how you might make the horn: