remove the bevy based turtle and rename turtle-lib-macroquad to turtle-lib

turtle-lib/src/general/angle.rs

@@ -0,0 +1,205 @@
+//! Angle type with degrees and radians support
+
+use super::Precision;
+use std::ops::{Add, Div, Mul, Neg, Rem, Sub};
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+pub enum AngleUnit {
+    Degrees(Precision),
+    Radians(Precision),
+}
+
+impl Default for AngleUnit {
+    fn default() -> Self {
+        Self::Degrees(0.0)
+    }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+pub struct Angle {
+    value: AngleUnit,
+}
+
+impl Default for Angle {
+    fn default() -> Self {
+        Self {
+            value: AngleUnit::Degrees(0.0),
+        }
+    }
+}
+
+impl From<i16> for Angle {
+    fn from(i: i16) -> Self {
+        Self {
+            value: AngleUnit::Degrees(Precision::from(i)),
+        }
+    }
+}
+
+impl From<f32> for Angle {
+    fn from(f: f32) -> Self {
+        Self {
+            value: AngleUnit::Degrees(f),
+        }
+    }
+}
+
+impl Rem<Precision> for Angle {
+    type Output = Self;
+
+    fn rem(self, rhs: Precision) -> Self::Output {
+        match self.value {
+            AngleUnit::Degrees(v) => Self::degrees(v % rhs),
+            AngleUnit::Radians(v) => Self::radians(v % rhs),
+        }
+    }
+}
+
+impl Mul<Precision> for Angle {
+    type Output = Self;
+
+    fn mul(self, rhs: Precision) -> Self::Output {
+        match self.value {
+            AngleUnit::Degrees(v) => Self::degrees(v * rhs),
+            AngleUnit::Radians(v) => Self::radians(v * rhs),
+        }
+    }
+}
+
+impl Div<Precision> for Angle {
+    type Output = Self;
+
+    fn div(self, rhs: Precision) -> Self::Output {
+        match self.value {
+            AngleUnit::Degrees(v) => Self::degrees(v / rhs),
+            AngleUnit::Radians(v) => Self::radians(v / rhs),
+        }
+    }
+}
+
+impl Neg for Angle {
+    type Output = Self;
+
+    fn neg(self) -> Self::Output {
+        match self.value {
+            AngleUnit::Degrees(v) => Self::degrees(-v),
+            AngleUnit::Radians(v) => Self::radians(-v),
+        }
+    }
+}
+
+impl Neg for &Angle {
+    type Output = Angle;
+
+    fn neg(self) -> Self::Output {
+        match self.value {
+            AngleUnit::Degrees(v) => Angle::degrees(-v),
+            AngleUnit::Radians(v) => Angle::radians(-v),
+        }
+    }
+}
+
+impl Add for Angle {
+    type Output = Angle;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        match (self.value, rhs.value) {
+            (AngleUnit::Degrees(v), AngleUnit::Degrees(o)) => Self::degrees(v + o),
+            (AngleUnit::Degrees(v), AngleUnit::Radians(o)) => Self::radians(v.to_radians() + o),
+            (AngleUnit::Radians(v), AngleUnit::Degrees(o)) => Self::radians(v + o.to_radians()),
+            (AngleUnit::Radians(v), AngleUnit::Radians(o)) => Self::radians(v + o),
+        }
+    }
+}
+
+impl Sub for Angle {
+    type Output = Angle;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        match (self.value, rhs.value) {
+            (AngleUnit::Degrees(v), AngleUnit::Degrees(o)) => Self::degrees(v - o),
+            (AngleUnit::Degrees(v), AngleUnit::Radians(o)) => Self::radians(v.to_radians() - o),
+            (AngleUnit::Radians(v), AngleUnit::Degrees(o)) => Self::radians(v - o.to_radians()),
+            (AngleUnit::Radians(v), AngleUnit::Radians(o)) => Self::radians(v - o),
+        }
+    }
+}
+
+impl Angle {
+    #[must_use]
+    pub fn degrees(value: Precision) -> Self {
+        Self {
+            value: AngleUnit::Degrees(value),
+        }
+    }
+
+    #[must_use]
+    pub fn radians(value: Precision) -> Self {
+        Self {
+            value: AngleUnit::Radians(value),
+        }
+    }
+
+    #[must_use]
+    pub fn value(&self) -> Precision {
+        match self.value {
+            AngleUnit::Degrees(v) | AngleUnit::Radians(v) => v,
+        }
+    }
+
+    #[must_use]
+    pub fn to_radians(self) -> Self {
+        match self.value {
+            AngleUnit::Degrees(v) => Self::radians(v.to_radians()),
+            AngleUnit::Radians(_) => self,
+        }
+    }
+
+    #[must_use]
+    pub fn to_degrees(self) -> Self {
+        match self.value {
+            AngleUnit::Degrees(_) => self,
+            AngleUnit::Radians(v) => Self::degrees(v.to_degrees()),
+        }
+    }
+
+    #[must_use]
+    pub fn limit_smaller_than_full_circle(self) -> Self {
+        use std::f32::consts::PI;
+        match self.value {
+            AngleUnit::Degrees(v) => Self::degrees(v % 360.0),
+            AngleUnit::Radians(v) => Self::radians(v % (2.0 * PI)),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn convert_to_radians() {
+        let radi = Angle::radians(30f32.to_radians());
+        let degr = Angle::degrees(30f32);
+        let converted = degr.to_radians();
+        assert!((radi.value() - converted.value()).abs() < 0.0001);
+    }
+
+    #[test]
+    fn sum_degrees() {
+        let fst = Angle::degrees(30f32);
+        let snd = Angle::degrees(30f32);
+        let sum = fst + snd;
+        assert!((sum.value() - 60f32).abs() < 0.0001);
+        assert!((sum.to_radians().value() - 60f32.to_radians()).abs() < 0.0001);
+    }
+
+    #[test]
+    fn sum_mixed() {
+        let fst = Angle::degrees(30f32);
+        let snd = Angle::radians(30f32.to_radians());
+        let sum = fst + snd;
+        assert!((sum.to_degrees().value() - 60f32).abs() < 0.0001);
+        assert!((sum.to_radians().value() - 60f32.to_radians()).abs() < 0.0001);
+    }
+}