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72 lines
1.8 KiB
V
72 lines
1.8 KiB
V
import gg
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import math
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const pixel_count = 15000
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const p = 3
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const s = math.pi * 2 / f32(pixel_count)
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const color = gg.Color{255, 255, 255, 255}
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const background = gg.Color{20, 20, 64, 5}
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const colors = [
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gg.Color{255, 255, 255, 255},
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gg.Color{255, 0, 255, 255},
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gg.Color{255, 255, 0, 255},
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gg.Color{0, 255, 255, 255},
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gg.Color{0, 0, 255, 255},
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gg.Color{0, 0, 0, 255},
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]!
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mut k := 497
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mut scale := 200
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gg.start(
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window_title: 'Spirograph'
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bg_color: background
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width: 900
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height: 950
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sample_count: 2
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frame_fn: fn [mut k, mut scale] (mut ctx gg.Context) {
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wsize := gg.window_size()
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ctx.begin()
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ctx.draw_rect_filled(0, 0, wsize.width, wsize.height, gg.Color{10, 1, 30, 60})
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t := f64(ctx.frame) / 300
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d := math.sin(t)
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if math.abs(d) < 0.0015 {
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k++
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}
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if ctx.pressed_keys[int(gg.KeyCode._0)] {
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ctx.frame = 475
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}
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if ctx.pressed_keys[int(gg.KeyCode.left)] {
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k--
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}
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if ctx.pressed_keys[int(gg.KeyCode.right)] {
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k++
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}
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if ctx.pressed_keys[int(gg.KeyCode.up)] {
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scale++
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}
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if ctx.pressed_keys[int(gg.KeyCode.down)] {
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scale--
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}
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d600 := math.sin(f64(ctx.frame) / 60)
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cd600 := math.cos(d600)
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mut pdj, mut pkj := [p]f64{}, [p]f64{}
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for j := 0; j < p; j++ {
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pdj[j], pkj[j] = math.pow(d, j), math.pow(k, j)
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}
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for i := 0; i < pixel_count; i++ {
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mut x, mut y := 0.0, 0.0
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for j := 0; j < p; j++ {
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a := pkj[j] * i * s
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x += pdj[j] * math.sin(a - t) * cd600
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y += pdj[j] * math.cos(a - t) * cd600
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}
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ctx.draw_rect_filled(f32(wsize.width / 2 + scale * x), f32(wsize.height / 2 + scale * y),
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1, 1, colors[i % colors.len])
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}
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ctx.draw_text(wsize.width / 2 - 170, wsize.height - 15, 'frame: ${ctx.frame:06}, k: ${k:4}, scale: ${scale:4}, arrows to change',
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color: colors[1]
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)
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ctx.end(how: .passthru)
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}
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)
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