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Tune hand pressure visualization

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This commit is contained in:
lenn
2026-07-14 11:08:00 +08:00
parent 5af3c2862b
commit 466bb5dec7
5 changed files with 273 additions and 60 deletions
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229
src/app.rs
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@@ -62,6 +62,7 @@ pub struct EskinDesktopApp {
latest_matrix_rows: u32,
latest_matrix_cols: u32,
last_sample_at: Option<Instant>,
last_color_debug_at: Option<Instant>,
breakout_visible: bool,
breakout_game: BreakoutGame,
live_rates: LiveRateMeters,
@@ -175,6 +176,7 @@ impl EskinDesktopApp {
latest_matrix_rows: MATRIX_ROWS,
latest_matrix_cols: MATRIX_COLS,
last_sample_at: None,
last_color_debug_at: None,
breakout_visible: false,
breakout_game: BreakoutGame::default(),
live_rates: LiveRateMeters::new(),
@@ -339,6 +341,7 @@ impl EskinDesktopApp {
self.latest_raw_matrix.extend_from_slice(&sample.matrix);
self.latest_matrix_rows = sample.rows;
self.latest_matrix_cols = sample.cols;
self.log_hand_color_mapping_debug(&sample.matrix);
self.analyze_spatial_force(&sample.matrix);
@@ -580,6 +583,7 @@ impl EskinDesktopApp {
self.pressure_matrix.fill([0.0, 0.0]);
self.hand_pressure.clear();
self.last_sample_at = None;
self.last_color_debug_at = None;
self.force_estimator.reset();
self.latest_spatial_force = None;
self.latest_hand_spatial_forces = [None; HAND_FINGERTIP_COUNT];
@@ -599,6 +603,50 @@ impl EskinDesktopApp {
SerialMode::Hand => ActiveMode::Hand(HandGatewayMode { range: 0..7000 }),
}
}
fn log_hand_color_mapping_debug(&mut self, raw: &[u32]) {
let now = Instant::now();
if self
.last_color_debug_at
.is_some_and(|last| now.duration_since(last) < Duration::from_secs(1))
{
return;
}
self.last_color_debug_at = Some(now);
let mut parts = Vec::with_capacity(HAND_FORCE_PANEL_COUNT);
let mut start = 0;
for (panel_index, (range, cell_count)) in HAND_SENSOR_PANEL_COLOR_RANGES
.iter()
.copied()
.zip(HAND_SENSOR_PANEL_CELL_COUNTS)
.enumerate()
{
let end = start + cell_count;
let peak = raw
.get(start..end)
.unwrap_or(&[])
.iter()
.copied()
.max()
.unwrap_or(0);
let cell_range = range.per_cell(cell_count);
let [intensity, _] = cell_range.normalize(peak);
parts.push(format!(
"{} raw_peak={} range_total_max={:.0} cell_range_max={:.0} intensity={:.3}",
match panel_index {
0..=4 => format!("F{}", panel_index + 1),
5 => "Palm-H".to_owned(),
_ => "Palm-V".to_owned(),
},
peak,
range.max,
cell_range.max,
intensity
));
start = end;
}
}
}
fn hand_image_pixel_to_screen(rect: egui::Rect, point_px: [f32; 2]) -> egui::Pos2 {
@@ -693,18 +741,18 @@ fn raw_to_hand_segment_g(index: usize, raw: u32) -> f32 {
2 => raw_to_g3(raw),
3 => raw_to_g4(raw),
4 => raw_to_g5(raw),
5 => raw_to_g6(raw),
6 => raw_to_g7(raw),
// 5 => raw_to_g6(raw),
// 6 => raw_to_g7(raw),
_ => raw_to_gd(raw),
}
}
fn raw_to_gd(raw: u32) -> f32 {
const RAW: [u32; 12] = [
0, 21382, 108507, 123183, 147405, 171105, 192395, 250443, 231423, 350560, 396616, 429444,
const RAW: [u32; 11] = [
0, 486, 5310, 8130, 10005, 12883, 14700, 18141, 19877, 26270, 32648,
];
const FORCE_CENTI_N: [f32; 12] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0, 2557.0,
const FORCE_CENTI_N: [f32; 11] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0,
];
if raw <= RAW[0] {
@@ -736,7 +784,7 @@ fn raw_to_gd(raw: u32) -> f32 {
fn raw_to_g1(raw: u32) -> f32 {
const RAW: [u32; 11] = [
0, 115181, 365308, 485911, 598964, 681811, 761756, 877545, 976003, 1168784, 1309378,
0, 106443, 365678, 449286, 532425, 608187, 685522, 797058, 886997, 1082570, 1244793,
];
const FORCE_CENTI_N: [f32; 11] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0,
@@ -771,7 +819,7 @@ fn raw_to_g1(raw: u32) -> f32 {
fn raw_to_g2(raw: u32) -> f32 {
const RAW: [u32; 11] = [
0, 116825, 371568, 475160, 567645, 651220, 714733, 832157, 938778, 1144649, 1290773,
0, 111143, 310153, 375593, 427920, 497433, 548676, 648392, 715118, 877487, 994887,
];
const FORCE_CENTI_N: [f32; 11] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0,
@@ -806,7 +854,7 @@ fn raw_to_g2(raw: u32) -> f32 {
fn raw_to_g3(raw: u32) -> f32 {
const RAW: [u32; 11] = [
0, 113320, 367656, 457415, 538259, 613913, 666943, 791771, 877385, 1035434, 1196014,
0, 66898, 271692, 354094, 443663, 534994, 603246, 721942, 837520, 1030111, 1216809,
];
const FORCE_CENTI_N: [f32; 11] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0,
@@ -841,7 +889,7 @@ fn raw_to_g3(raw: u32) -> f32 {
fn raw_to_g4(raw: u32) -> f32 {
const RAW: [u32; 11] = [
0, 106394, 383401, 495623, 590405, 681715, 767392, 906395, 1030218, 1254130, 1385368,
0, 122337, 381708, 480527, 577445, 677301, 762306, 906751, 1019182, 1254601, 1415051,
];
const FORCE_CENTI_N: [f32; 11] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0,
@@ -876,7 +924,7 @@ fn raw_to_g4(raw: u32) -> f32 {
fn raw_to_g5(raw: u32) -> f32 {
const RAW: [u32; 11] = [
0, 150954, 469433, 613171, 717043, 817483, 963155, 1129123, 1327873, 1668629, 1885354,
0, 82466, 287752, 356167, 433286, 506855, 604014, 671789, 770692, 887287, 1032058,
];
const FORCE_CENTI_N: [f32; 11] = [
0.0, 57.0, 257.0, 357.0, 457.0, 557.0, 657.0, 857.0, 1057.0, 1557.0, 2057.0,
@@ -1027,6 +1075,79 @@ fn split_viewport_body(rect: egui::Rect) -> egui::Rect {
)
}
#[derive(Clone, Copy)]
struct PressureColorRange {
min: f32,
max: f32,
gamma: f32,
}
// The shader begins its orange-to-red transition at intensity 0.66. With this
// gamma, a raw cell value at 80% of its configured range maps to that point.
const PRESSURE_COLOR_GAMMA: f32 = 1.86;
impl PressureColorRange {
const fn new(min: u32, max: u32) -> Self {
Self {
min: min as f32,
max: max as f32,
gamma: PRESSURE_COLOR_GAMMA,
}
}
fn normalize(self, value: u32) -> [f32; 2] {
let raw = value as f32;
let span = (self.max - self.min).max(1.0);
let mapped = ((raw - self.min) / span).clamp(0.0, 1.0);
let intensity = if raw <= self.min + 4.0 {
0.0
} else {
mapped.powf(self.gamma)
};
let display_value = if raw <= self.min + 4.0 {
0.0
} else {
raw.round().min(9999.0)
};
[intensity, display_value]
}
fn per_cell(self, cell_count: usize) -> Self {
let cells = cell_count.max(1) as f32;
Self {
min: self.min / cells,
max: self.max / cells,
gamma: self.gamma,
}
}
}
const DEFAULT_COLOR_RANGE: PressureColorRange = PressureColorRange::new(0, 7000);
const HAND_SENSOR_PANEL_COLOR_RANGES: [PressureColorRange; HAND_FORCE_PANEL_COUNT] = [
PressureColorRange::new(0, 1244793),
PressureColorRange::new(0, 994887),
PressureColorRange::new(0, 1216809),
PressureColorRange::new(0, 1415051),
PressureColorRange::new(0, 1032058),
PressureColorRange::new(0, 32648),
PressureColorRange::new(0, 32648),
];
const HAND_FINGER_SENSOR_CELLS: usize = 12 * 7;
const HAND_SENSOR_PANEL_CELL_COUNTS: [usize; HAND_FORCE_PANEL_COUNT] = [
HAND_FINGER_SENSOR_CELLS,
HAND_FINGER_SENSOR_CELLS,
HAND_FINGER_SENSOR_CELLS,
HAND_FINGER_SENSOR_CELLS,
HAND_FINGER_SENSOR_CELLS,
5 * 14,
11 * 4,
];
fn normalize_pressure_sample(raw: &[u32], rows: u32, cols: u32, normalized: &mut PressureFrame) {
normalized.fill([0.0, 0.0]);
@@ -1046,28 +1167,37 @@ fn normalize_pressure_sample(raw: &[u32], rows: u32, cols: u32, normalized: &mut
}
fn normalize_pressure_samples(raw: &[u32]) -> PressureSamples {
raw.iter().copied().map(normalize_pressure_value).collect()
raw.iter()
.copied()
.enumerate()
.map(|(index, value)| {
hand_sensor_panel_for_index(index)
.map(|(range, cell_count)| range.per_cell(cell_count).normalize(value))
.unwrap_or_else(|| DEFAULT_COLOR_RANGE.normalize(value))
})
.collect()
}
fn hand_sensor_panel_for_index(index: usize) -> Option<(PressureColorRange, usize)> {
let mut start = 0;
for (range, cell_count) in HAND_SENSOR_PANEL_COLOR_RANGES
.iter()
.copied()
.zip(HAND_SENSOR_PANEL_CELL_COUNTS)
{
let end = start + cell_count;
if index < end {
return Some((range, cell_count));
}
start = end;
}
None
}
fn normalize_pressure_value(value: u32) -> [f32; 2] {
const RANGE_MIN: f32 = 0.0;
const RANGE_MAX: f32 = 7000.0;
const DISPLAY_GAMMA: f32 = 0.45;
let raw_value = value as f32;
let mapped = ((raw_value - RANGE_MIN) / (RANGE_MAX - RANGE_MIN)).clamp(0.0, 1.0);
let intensity = if raw_value <= RANGE_MIN + 4.0 {
0.0
} else {
mapped.powf(DISPLAY_GAMMA)
};
let display_value = if raw_value <= RANGE_MIN + 4.0 {
0.0
} else {
raw_value.round().min(9999.0)
};
[intensity, display_value]
DEFAULT_COLOR_RANGE.normalize(value)
}
#[cfg(test)]
@@ -1082,8 +1212,8 @@ mod tests {
let [low_intensity, low_label] = normalize_pressure_value(100);
assert!(
low_intensity > 0.10,
"low hand-gateway values should be visible in the wgpu dot matrix"
low_intensity > 0.0,
"low hand-gateway values should retain a non-zero response"
);
assert_eq!(low_label, 100.0);
@@ -1091,6 +1221,40 @@ mod tests {
assert_eq!(max_intensity, 1.0);
assert_eq!(max_label, 7000.0);
}
#[test]
fn pressure_normalization_starts_red_transition_at_eighty_percent() {
let range = PressureColorRange::new(0, 10_000);
let [intensity, _] = range.normalize(8_000);
assert!(
(intensity - 0.66).abs() < 0.002,
"80% of the configured raw range should map to the shader's red-transition point"
);
}
#[test]
fn hand_panel_ranges_cover_both_palm_boards() {
let total_cells: usize = HAND_SENSOR_PANEL_CELL_COUNTS.iter().sum();
let mut raw = vec![0; total_cells];
let mut start = 0;
for (range, cell_count) in HAND_SENSOR_PANEL_COLOR_RANGES
.iter()
.copied()
.zip(HAND_SENSOR_PANEL_CELL_COUNTS)
{
raw[start] = (range.max / cell_count as f32).ceil() as u32;
start += cell_count;
}
let normalized = normalize_pressure_samples(&raw);
let palm_horizontal_start = HAND_SENSOR_PANEL_CELL_COUNTS[..5].iter().sum::<usize>();
let palm_vertical_start = palm_horizontal_start + HAND_SENSOR_PANEL_CELL_COUNTS[5];
assert_eq!(normalized[palm_horizontal_start][0], 1.0);
assert_eq!(normalized[palm_vertical_start][0], 1.0);
}
}
impl eframe::App for EskinDesktopApp {
@@ -1109,4 +1273,3 @@ impl eframe::App for EskinDesktopApp {
ctx.request_repaint();
}
}