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Add per-channel Swing configuration (#7)

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Select swing amount from a percentage range of the beat starting a 50% (unchanged) to a max swing amount of 95% (about 1/32nd note before end of period). Swing percentage shows an indicator marker when the percentage lines up with a quantized note on the grid.

This is probably going to be the last feature because it is pushing up against the limits of available dynamic memory.

Out of scope changes:
- selecting parameters / values no longer wraps
- reduce dynamic memory used in processClockTick
- various readability formatting

Reviewed-on: https://git.pinkduck.xyz/adam/libGravity/pulls/7
Co-authored-by: Adam Wonak <adam.wonak@gmail.com>
Co-committed-by: Adam Wonak <adam.wonak@gmail.com>
This commit is contained in:
Adam Wonak
2025-06-22 18:38:51 +00:00
committed by adam
parent c8e42c7448
commit 973c13b8ef
6 changed files with 95 additions and 32 deletions
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41
examples/Gravity/display.h
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@ -96,16 +96,16 @@ void drawRightAlignedText(const char* text, int y) {
void drawSelectHero() {
gravity.display.setDrawColor(1);
const int tickSize = 3;
const int heroWidth = SCREEN_WIDTH/2;
const int heroWidth = SCREEN_WIDTH / 2;
const int heroHeight = 49;
gravity.display.drawLine(0, 0, tickSize, 0);
gravity.display.drawLine(0, 0, 0, tickSize);
gravity.display.drawLine(heroWidth, 0, heroWidth-tickSize, 0);
gravity.display.drawLine(heroWidth, 0, heroWidth - tickSize, 0);
gravity.display.drawLine(heroWidth, 0, heroWidth, tickSize);
gravity.display.drawLine(heroWidth, heroHeight, heroWidth, heroHeight-tickSize);
gravity.display.drawLine(heroWidth, heroHeight, heroWidth-tickSize, heroHeight);
gravity.display.drawLine(heroWidth, heroHeight, heroWidth, heroHeight - tickSize);
gravity.display.drawLine(heroWidth, heroHeight, heroWidth - tickSize, heroHeight);
gravity.display.drawLine(0, heroHeight, tickSize, heroHeight);
gravity.display.drawLine(0, heroHeight, 0, heroHeight-tickSize);
gravity.display.drawLine(0, heroHeight, 0, heroHeight - tickSize);
gravity.display.setDrawColor(2);
}
@ -147,6 +147,24 @@ void drawMenuItems(const char* menu_items[], int menu_size) {
}
}
// Display an indicator when swing percentage matches a musical note.
void swingDivisionMark() {
auto& ch = GetSelectedChannel();
switch (ch.getSwing()) {
case 58: // 1/32nd
case 66: // 1/16th
case 75: // 1/8th
gravity.display.drawBox(56, 4, 4, 4);
break;
case 54: // 1/32nd tripplet
case 62: // 1/16th tripplet
case 71: // 1/8th tripplet
gravity.display.drawBox(56, 4, 4, 4);
gravity.display.drawBox(57, 5, 2, 2);
break;
}
}
// Main display functions
void DisplayMainPage() {
@ -244,6 +262,13 @@ void DisplayChannelPage() {
sprintf(mainText, "%d%%", ch.getOffset(withCvMod));
subText = "SHIFT HIT";
break;
case PARAM_CH_SWING:
ch.getSwing() == 50
? sprintf(mainText, "OFF")
: sprintf(mainText, "%d%%", ch.getSwing(withCvMod));
subText = "DOWN BEAT";
swingDivisionMark();
break;
case PARAM_CH_CV_SRC: {
switch (ch.getCvSource()) {
case CV_NONE:
@ -283,6 +308,10 @@ void DisplayChannelPage() {
sprintf(mainText, "DEST");
subText = "OFFSET";
break;
case CV_DEST_SWING:
sprintf(mainText, "DEST");
subText = "SWING";
break;
}
break;
}
@ -293,7 +322,7 @@ void DisplayChannelPage() {
// Draw Channel Page menu items
const char* menu_items[PARAM_CH_LAST] = {
"MOD", "PROBABILITY", "DUTY", "OFFSET", "CV SOURCE", "CV DEST"};
"MOD", "PROBABILITY", "DUTY", "OFFSET", "SWING", "CV SOURCE", "CV DEST"};
drawMenuItems(menu_items, PARAM_CH_LAST);
}