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examples: cleanup melody.v even more

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Delyan Angelov 2024-08-01 09:49:57 +03:00
parent ab8f1ba21b
commit aa07eafb5f
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1 changed files with 8 additions and 13 deletions
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21
examples/sokol/sounds/melody.v
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@ -26,35 +26,30 @@ fn my_audio_stream_callback(mut soundbuffer &f32, num_frames int, num_channels i
fn graphics_frame(mut state AppState) { fn graphics_frame(mut state AppState) {
ws := gg.window_size() ws := gg.window_size()
center_y := ws.height / 2 center_y := f32(ws.height / 2)
state.gg.begin() state.gg.begin()
for x in 0 .. 1024 { for x in 0 .. 1024 {
vx := int(ws.width * f64(x) / 1024.0) vx := ws.width * f32(x) / 1024.0
vy := f32(center_y) * 3.0 / 4.0 * (state.frames[2 * x] + state.frames[2 * x + 1]) vy := center_y * 3.0 / 4.0 * (state.frames[2 * x] + state.frames[2 * x + 1])
color := gg.Color{state.f(x), state.f(x + 300), state.f(x + 700), 255} color := gg.Color{f(state, x), f(state, x + 300), f(state, x + 700), 255}
state.gg.draw_line(vx, center_y, vx, center_y + vy, color) state.gg.draw_line(vx, center_y, vx, center_y + vy, color)
} }
state.gg.end() state.gg.end()
} }
@[inline] fn f(state &AppState, idx int) u8 {
fn (state &AppState) f(idx int) u8 {
return u8(127 + state.frames[(int(state.gg.frame) + idx) & 2047] * 128) return u8(127 + state.frames[(int(state.gg.frame) + idx) & 2047] * 128)
} }
fn main() { fn main() {
println('Based on the ByteBeat formula from: https://www.youtube.com/watch?v=V4GfkFbDojc \n "Techno" by Gabriel Miceli') println('Based on the ByteBeat formula from: https://www.youtube.com/watch?v=V4GfkFbDojc \n "Techno" by Gabriel Miceli')
mut state := &AppState{} mut state := &AppState{}
audio.setup( audio.setup(stream_userdata_cb: my_audio_stream_callback, user_data: state)
stream_userdata_cb: my_audio_stream_callback
user_data: state
)
defer { audio.shutdown() } defer { audio.shutdown() }
state.gg = gg.new_context( state.gg = gg.new_context(
bg_color: gg.Color{50, 50, 50, 255} bg_color: gg.Color{50, 50, 50, 255}
width: 1024 width: 800
height: 400 height: 600
create_window: true
window_title: 'ByteBeat Music' window_title: 'ByteBeat Music'
frame_fn: graphics_frame frame_fn: graphics_frame
user_data: state user_data: state