17 lines
337 B
Rust
17 lines
337 B
Rust
use ::std::f32::consts::PI;
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/// <https://easings.net/#easeInSine>
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pub fn sine_in(t: f32) -> f32 {
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1.0 - (t * PI / 2.0).cos()
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}
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/// <https://easings.net/#easeOutSine>
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pub fn sine_out(t: f32) -> f32 {
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(t * PI / 2.0).sin()
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}
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/// <https://easings.net/#easeInOutSine>
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pub fn sine_in_out(t: f32) -> f32 {
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-((PI * t).cos() - 1.0) / 2.0
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}
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