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use crate::AngleMode;
pub enum Function {
Sin, // Sine
Cos, // Cosine
Tan, // Tangent
Asin, // Inverse sine
Acos, // Inverse cosine
Atan, // Inverse tangent
Deg, // Convert from radians to degrees
Rad, // Convert from degrees to radians
}
impl Function {
pub fn parse(s: &str) -> Result<Self, ParseFunctionError> {
match s {
"sin" => Ok(Self::Sin),
"cos" => Ok(Self::Cos),
"tan" => Ok(Self::Tan),
"asin" => Ok(Self::Asin),
"acos" => Ok(Self::Acos),
"atan" => Ok(Self::Atan),
"deg" => Ok(Self::Deg),
"rad" => Ok(Self::Rad),
_ => Err(ParseFunctionError(s.to_string())),
}
}
pub fn call(&self, val: f64, angle_mode: AngleMode) -> f64 {
match self {
Self::Sin => match angle_mode {
AngleMode::Degrees => val.to_radians().sin(),
AngleMode::Radians => val.sin(),
},
Self::Cos => match angle_mode {
AngleMode::Degrees => val.to_radians().cos(),
AngleMode::Radians => val.cos(),
},
Self::Tan => match angle_mode {
AngleMode::Degrees => val.to_radians().tan(),
AngleMode::Radians => val.tan(),
},
Self::Asin => match angle_mode {
AngleMode::Degrees => val.asin().to_degrees(),
AngleMode::Radians => val.asin(),
},
Self::Acos => match angle_mode {
AngleMode::Degrees => val.acos().to_degrees(),
AngleMode::Radians => val.acos(),
},
Self::Atan => match angle_mode {
AngleMode::Degrees => val.atan().to_degrees(),
AngleMode::Radians => val.atan(),
},
Self::Deg => val.to_degrees(),
Self::Rad => val.to_radians(),
}
}
}
pub struct ParseFunctionError(String);
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