Need the user to be able to draw lines on the screen.

Questions & Answers
1

Hi everyone. I have been searching and searching for an answer to my problem high and low and have come up blank. I really hope someone here can point me in the right direction.

I am working on part of a program where the user has to draw on the screen and I have to check their input to make sure it is correct. I actually have all of this working. However the person who owns this program is not happy with my input line. I am using open GL and it draws an itty bitty line which apparently looks like an etch-a-sketch. I have spent the day trying to make my lines thicker and have had zero luck. i have tried using vectrosity and for some reason the lines get wider on the x-z axis and not the x-y axis and I’m pulling my hair out trying to fix it.

I would appreciate any suggestions anyone might have. It doesn’t have to be vectrosity and I am using unity pro. Any simple (if possible) ways to have user inputted thicker lines would be help me so much.

2

Does it need to be an actual line? Or can you cheat by drawing a filled rectangle?

If you use GL.Begin(GL.QUADS);, you can provide rectangle points.

You won’t make a THICKER line. A line is 1d, so “thicker” doesn’t make sense, that’d make it 2d.

Check out quads though, you can definitely fill in a rectangle. It’d look something like:

        GL.Color (color);
        GL.Begin (GL.QUADS);
        GL.Vertex3 (position.x, position.y, 0);
        GL.Vertex3 (position.x + position.width, position.y, 0);
        GL.Vertex3 (position.x + position.width, position.y + position.height, 0);
        GL.Vertex3 (position.x, position.y + position.height, 0);
        GL.End ();

Not quite it, but you get the idea. Here’s the documentation on quads: Unity - Scripting API: GL.QUADS