53 lines
1.2 KiB
Rust
53 lines
1.2 KiB
Rust
// file: crates/engines/engine-v1-common/src/pointer.rs
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// version: 1
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/// Platform-independent normalized primary pointer state for one engine update.
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub struct PointerState {
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active: bool,
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x: f32,
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y: f32,
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}
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impl PointerState {
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/// Creates an inactive pointer at the normalized origin.
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#[must_use]
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pub const fn inactive() -> Self {
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return Self { active: false, x: 0.0, y: 0.0 };
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}
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/// Creates a pointer state from normalized coordinates.
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#[must_use]
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pub fn normalized(active: bool, x: f32, y: f32) -> Self {
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return Self { active, x: x.clamp(0.0, 1.0), y: y.clamp(0.0, 1.0) };
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}
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/// Reports whether the pointer is currently active.
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#[must_use]
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pub const fn active(self) -> bool {
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return self.active;
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}
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/// Returns the normalized horizontal coordinate.
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#[must_use]
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pub const fn x(self) -> f32 {
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return self.x;
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}
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/// Returns the normalized vertical coordinate.
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#[must_use]
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pub const fn y(self) -> f32 {
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return self.y;
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}
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}
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impl Default for PointerState {
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fn default() -> Self {
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return Self::inactive();
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}
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}
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#[cfg(test)]
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#[path = "../unit_tests/pointer.rs"]
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mod tests;
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