Glowing star
Example Links
Calculate the distance of the point p from the radius r.
Calculate the distance of the point p from the star with radius r, and a relative value rf controlling the depth of the stars points.
val circleSDF = sdCircle(env.UV - 0.5f, 0.25f)
drawSdfCircle(circleSDF) // Simple SDF
drawSdfCircle2(circleSDF) // Using it as a cos wave
drawStarStep1(starSDF) // SDF
drawStarStep2(starSDF) // Annular
drawStarStep3(starSDF) // Glow