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Fabio William ConceiçãoandCursor
80090e7623
Store the registration point with the symbol and place instances so that point lands on (x, y). Symbol Options exposes the same 9-point control as Transform. Co-authored-by: Cursor <cursoragent@cursor.com>
37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
//! Symbol Options › Registration: the 9-point grid (0 = top-left … 4 = centre … 8 = bottom-right)
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//! that `symbol.place` uses as the point that lands on the click.
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use vectorcraft_geom::Vec2;
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/// Document unknown key: `{ symbolName: 0..8 }` for each symbol's registration point.
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pub const SYMBOL_REGISTRATION: &str = "symbolRegistration";
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/// Index on the 9-point grid (row-major, 4 = centre).
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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pub struct SymbolRegistration(pub u8);
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impl Default for SymbolRegistration {
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fn default() -> Self {
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Self(4)
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}
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}
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impl SymbolRegistration {
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pub const CENTER: Self = Self(4);
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pub fn from_u64(v: u64) -> Option<Self> {
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(v <= 8).then_some(Self(v as u8))
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}
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pub fn is_center(self) -> bool {
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self.0 == 4
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}
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/// Offset of this registration point from the symbol's centre, in natural-size units
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/// (right +, down +).
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pub fn offset_from_center(self, w: f64, h: f64) -> Vec2 {
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let (col, row) = (self.0 % 3, self.0 / 3);
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Vec2::new((f64::from(col) - 1.0) * (w * 0.5), (f64::from(row) - 1.0) * (h * 0.5))
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}
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}
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