Glowing Star Demo

This particular demo was made, but never used, in a talk. As such there is more code here than is actually used.

Try experimenting with commenting and uncommenting the various 'draw' functions below to get an idea of how the star is built up.

If you checkout this repo, you can run the demo locally (on mac / linux, slightly more work on Windows...) with:

./mill 'examples.fragment.demos.glowing-star.runGame'

Example Links

• Edit this page

• Live demo

      def fragment(color: vec4): vec4 =
        // val circleSDF = sdCircle(env.UV - 0.5f, 0.25f)

        // drawSdfCircle(circleSDF)  // Simple SDF
        // drawSdfCircle2(circleSDF) // Using it as a cos wave

        val starSDF = sdStar5((env.UV - 0.5f) * vec2(1.0f, -1.0f), 0.25f, 0.6f)

        // drawStarStep1(starSDF) // SDF
        // drawStarStep2(starSDF) // Annular
        // drawStarStep3(starSDF) // Glow
        drawStarStep4(starSDF) // Putting it all together in color
      ```