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/#easeInCubic>
+pub fn cubic_in(t: f32) -> f32 {
+	t * t * t
+}
+
+/// <https://easings.net/#easeOutCubic>
+pub fn cubic_out(t: f32) -> f32 {
+	1.0 - (1.0 - t).powi(3)
+}
+
+/// <https://easings.net/#easeInOutCubic>
+pub fn cubic_in_out(t: f32) -> f32 {
+	if t < 0.5 {
+		4.0 * t * t * t
+	} else {
+		1.0 - (-2.0 * t + 2.0).powi(3) / 2.0
+	}
+}