refactor: 配置面板改造为顶部固定栏 + 压力归一化优化

src/render.rs

@@ -1246,11 +1246,11 @@ fn build_hand_palm_dot_instances(
 
         for row in 0..chip.rows {
             for col in 0..chip.cols {
-                let index = (row * chip.cols + col) as usize;
                 let offset = match chip_index {
                     0 => HAND_PALM_HORIZONTAL_OFFSET,
                     _ => HAND_PALM_VERTICAL_OFFSET,
                 };
+                let index = hand_palm_pressure_index(chip_index, row, col, chip.rows, chip.cols);
                 let [normalized, display_value] =
                     sample_pressure_at(pressure, offset + index, index);
 
@@ -1278,6 +1278,20 @@ fn build_hand_palm_dot_instances(
     instances
 }
 
+fn hand_palm_pressure_index(
+    chip_index: usize,
+    row: u32,
+    col: u32,
+    rows: u32,
+    cols: u32,
+) -> usize {
+    if chip_index == 0 {
+        (col * rows + (rows - 1 - row)) as usize
+    } else {
+        (row * cols + col) as usize
+    }
+}
+
 fn sample_pressure_at(pressure: &[[f32; 2]], index: usize, fallback_index: usize) -> [f32; 2] {
     pressure
         .get(index)
@@ -1409,3 +1423,24 @@ impl GlyphInstance {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn hand_palm_horizontal_uses_column_major_pressure_order() {
+        assert_eq!(hand_palm_pressure_index(0, 0, 0, 5, 14), 4);
+        assert_eq!(hand_palm_pressure_index(0, 1, 0, 5, 14), 3);
+        assert_eq!(hand_palm_pressure_index(0, 0, 1, 5, 14), 9);
+        assert_eq!(hand_palm_pressure_index(0, 4, 13, 5, 14), 65);
+    }
+
+    #[test]
+    fn hand_palm_vertical_keeps_row_major_pressure_order() {
+        assert_eq!(hand_palm_pressure_index(1, 0, 0, 11, 4), 0);
+        assert_eq!(hand_palm_pressure_index(1, 0, 1, 11, 4), 1);
+        assert_eq!(hand_palm_pressure_index(1, 1, 0, 11, 4), 4);
+        assert_eq!(hand_palm_pressure_index(1, 10, 3, 11, 4), 43);
+    }
+}