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Editorial Team
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Asked: 2026-06-10T00:11:24+00:00

Since GL_LINE_SMOOTH is not hardware accelerated, nor supported on all GFX cards, how do

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Since GL_LINE_SMOOTH is not hardware accelerated, nor supported on all GFX cards, how do you draw smooth lines in 2D mode, which would look as good as with GL_LINE_SMOOTH ?

Edit2: My current solution is to draw a line from 2 quads, which fade to zero transparency from edges and the colors in between those 2 quads would be the line color. it works good enough for basic smooth lines rendering and doesnt use texturing and thus is very fast to render.

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  1. Editorial Team

    Currently I am using 2 or 3 quads to do this, it is the simpliest way to do it.

    • If line thickness <= 1px, then you need only 2 quads.
    • If line thickness > 1px, then you need to add third quad in the middle.
    • The fading edge quads thickness must not change if the line thickness >= 1px.

    In the image below you can see the quads with blue borders. White color means full opacity and black color means zero opacity (=fully transparent).

    enter image description here

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