48 lines
1.3 KiB
Factor
Executable File
48 lines
1.3 KiB
Factor
Executable File
USING: arrays io kernel math math.functions math.order
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math.parser sequences locals byte-arrays byte-vectors io.files
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io.encodings.binary benchmark.mandel.params
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benchmark.mandel.colors ;
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IN: benchmark.mandel
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: iter ( c z nb-iter -- x )
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dup 0 <= [ 2nip ] [
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over absq 4.0 >= [ 2nip ] [
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>r sq dupd + r> 1- iter
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] if
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] if ; inline recursive
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: x-inc width 200000 zoom-fact * / ; inline
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: y-inc height 150000 zoom-fact * / ; inline
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: c ( i j -- c )
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[ x-inc * center real-part x-inc width 2 / * - + >float ]
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[ y-inc * center imaginary-part y-inc height 2 / * - + >float ] bi*
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rect> ; inline
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:: render ( accum -- )
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height [
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width swap [
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c C{ 0.0 0.0 } nb-iter iter dup zero?
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[ drop B{ 0 0 0 } ] [ color-map [ length mod ] keep nth ] if
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accum push-all
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] curry each
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] each ; inline
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:: ppm-header ( accum -- )
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"P6\n" accum push-all
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width number>string accum push-all
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" " accum push-all
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height number>string accum push-all
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"\n255\n" accum push-all ; inline
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: buf-size ( -- n ) width height * 3 * 100 + ; inline
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: mandel ( -- data )
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buf-size <byte-vector>
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[ ppm-header ] [ render ] [ B{ } like ] tri ;
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: mandel-main ( -- )
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mandel "mandel.ppm" temp-file binary set-file-contents ;
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MAIN: mandel-main
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