Is it possible to draw line thickness in a fragment shader?

Question

Is it possible for me to add line thickness in the fragment shader considering that I draw the line with GL_LINES? Most of the examples I saw seem to access only the texels

Answer 1

A simple hack is to just add a jitter in the vertex shader: gl_Position += vec4(delta, delta, delta, 0.0); where delta is the pixelsize i.e. 1.0/viewsize

Do the line-draw pass twice using zero, and then the delta as jitter (passed in as a uniform).