Draw a sphere: Difference between revisions
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→{{header|Sidef}}: updated code
m (bugfix: divide by 0 crash when r=0) |
m (→{{header|Sidef}}: updated code) |
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Line 4,033:
Produces a PGM image.
<lang ruby>func normalize (vec) { vec »/» (vec »*« vec -> sum.sqrt) }
func dot (x, y) { -(x »*« y -> sum)
var x = var y = 255
Line 4,049:
var vector = normalize([x, y, (r2 - x2 - y2).sqrt])
var intensity = (dot(light, vector)**k + ambient)
var pixel = (0
pixels << pixel
}
Line 4,063:
out.say("P5\n#{x} #{y}\n#{depth}") # .pgm header
out.
out.close</lang>
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