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optimize gradient generation code

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This commit is contained in:
Dennis Ranke
2021-11-15 18:33:38 +01:00
parent fdc98ddf17
commit 381b681115
1 changed files with 8 additions and 22 deletions
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30
examples/microw8/palette.cwa
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@@ -31,32 +31,18 @@ export fn tic(time: i32) {
}
}
fn make_gradient(c: f32, base: i32) -> i32 {
let i: i32;
loop colors {
let lazy f = (i + 4) as f32 / 64 as f32;
let lazy a = f * max(0.07, c + 0.5);
let lazy b = f * f * 0.6;
let lazy v = ((a + b - a * b) * 255 as f32) as i32;
(base + i)?(120+320*240) = select(v < 0, 0, select(v > 255, 255, v));
branch_if (i := i + 4) < 64: colors;
}
base + 1
}
start fn gen_palette() {
let i: i32;
loop hsv {
let a = (i as f32 + 0.5) * (3.141 / 6.0);
let inline base2 = make_gradient(cos(a) * 0.816, i * 64);
let inline base3 = make_gradient(sin(a) * 0.707 - cos(a) * 0.804, base2);
make_gradient(sin(a) * -0.707 - cos(a) * 0.804, base3);
loop gradients {
let inline angle = i as f32 * (3.1416 / 2.0 - 3.1416 / (11.0 * 16.0 * 2.0));
let lazy scale = (i % 64) as f32 / 64 as f32;
let lazy a = scale * max(0.07, sin(angle) * 0.8 * (i < 11*16*4) as f32 + 0.5);
let lazy b = scale * scale * 0.6;
let inline v = (min(a + b - a * b, 1 as f32) * 255 as f32) as i32;
i?(120+320*240) = v;
branch_if (i := i + 1) < 11: hsv;
branch_if (i := i + 1) < 12*16*4: gradients;
}
make_gradient(0 as f32, make_gradient(0 as f32, make_gradient(0 as f32, 11*16*4)));
i = 255;
loop expand_sweetie {