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slight optimization, add pulse width modulation to melody voices

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This commit is contained in:
Dennis Ranke
2022-03-09 09:22:27 +01:00
parent ce18a8a162
commit 39ead8220f
1 changed files with 7 additions and 7 deletions
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14
examples/curlywas/tim_ges.cwa
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@@ -1,5 +1,5 @@
fn melody(ch: i32, t: i32, T: i32) { fn melody(ch: i32, t: i32, T: i32) {
let inline riff_pos = abs(((T&31) - 16) as f32) as i32; let lazy riff_pos = abs(((T&31) - 16) as f32) as i32;
let lazy shift = ((1-((T>>5)&3))%2-1) * 2; let lazy shift = ((1-((T>>5)&3))%2-1) * 2;
let inline note_count = 5 - (T >= 512); let inline note_count = 5 - (T >= 512);
@@ -7,7 +7,7 @@ fn melody(ch: i32, t: i32, T: i32) {
let inline riff_note = 5514 >> (riff_pos % note_count * 4) & 15; let inline riff_note = 5514 >> (riff_pos % note_count * 4) & 15;
let inline melody_note = shift + octave - riff_note; let inline melody_note = shift + octave - riff_note;
ch?0 = ((T&1) << 1) | 0x4; // note trigger ch?1 = riff_pos * 10 + 4;
ch?3 = melody_note + 64; ch?3 = melody_note + 64;
let inline arp_note = shift + ((0x85>>((t/2)%3*4)) & 15) - 1; let inline arp_note = shift + ((0x85>>((t/2)%3*4)) & 15) - 1;
@@ -36,12 +36,12 @@ export fn upd() {
data 80 { data 80 {
i8( i8(
0, 64, 0, 128, 0x40, 0xe, 0, 64, 0, 128, 0, 0xe,
0, 128, 0, 128, 0x8, 0xc8, 0, 128, 0, 128, 0, 0xc8,
0, 32, 0, 128, 0xa, 0xa, 5, 128, 0, 128, 0, 0xc8,
0, 64, 0, 128, 0xa, 0xa, 5, 128, 0, 128, 0, 0xc8,
0xf8, 0x85, 0xf8, 0x85,
0xc1, 0xf1, 0, 110, 0, 90 0xc1, 0xf1, 0, 110, 0, 80
) )
} }