feat: add easing fns

2021-08-20 17:52:48 +02:00
parent 49badfeafa
commit a27639b43e
14 changed files with 306 additions and 0 deletions
@@ -0,0 +1,18 @@
+/// <https://easings.net/#easeInCirc>
+pub fn circ_in(t: f32) -> f32 {
+	1.0 - (1.0 - t.powi(2)).sqrt()
+}
+
+/// <https://easings.net/#easeOutCirc>
+pub fn circ_out(t: f32) -> f32 {
+	(1.0 - (t - 1.0).powi(2)).sqrt()
+}
+
+/// <https://easings.net/#easeInOutCirc>
+pub fn circ_in_out(t: f32) -> f32 {
+	if t < 0.5 {
+		(1.0 - (1.0 - (2.0 * t).powi(2)).sqrt()) / 2.0
+	} else {
+		((1.0 - (-2.0 * t + 2.0).powi(2)).sqrt() + 1.0) / 2.0
+	}
+}