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19 lines
570 B
Plaintext
19 lines
570 B
Plaintext
include "../include/microw8-api.cwa"
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export fn upd() {
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let i: i32;
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loop pixels {
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let inline t = 16!56;
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let inline x = (i % 320 - 160) as f32;
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let inline y = (i #/ 320 - 120) as f32;
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let inline d = 0xa000 as f32 / sqrt(x * x + y * y);
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let inline a = atan2(x, y) * 163_f; // (512 / pi)
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let inline u = i32.trunc_sat_f32_s(a) + t;
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let inline v = i32.trunc_sat_f32_s(d) + t * 2;
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let inline c = ((v ^ u) #/ 16) % 16;
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i?FRAMEBUFFER = c;
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branch_if (i := i + 1) < 320*240: pixels;
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}
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}
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