Function radiansToDegrees [src]

Converts an angle in radians to degrees. T must be a float or comptime number or a vector of floats.

Prototype

pub fn radiansToDegrees(ang: anytype) if (@TypeOf(ang) == comptime_int) comptime_float else @TypeOf(ang)

Example

 test radiansToDegrees {
    const zero: f32 = 0;
    const half_pi: f32 = pi / 2.0;
    const neg_quart_pi: f32 = -pi / 4.0;
    const one_pi: f32 = pi;
    const two_pi: f32 = 2.0 * pi;
    try std.testing.expectApproxEqAbs(@as(f32, 0), radiansToDegrees(zero), 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, 90), radiansToDegrees(half_pi), 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, -45), radiansToDegrees(neg_quart_pi), 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, 180), radiansToDegrees(one_pi), 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, 360), radiansToDegrees(two_pi), 1e-6);

    const result = radiansToDegrees(@Vector(4, f32){
        half_pi,
        neg_quart_pi,
        one_pi,
        two_pi,
    });
    try std.testing.expectApproxEqAbs(@as(f32, 90), result[0], 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, -45), result[1], 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, 180), result[2], 1e-6);
    try std.testing.expectApproxEqAbs(@as(f32, 360), result[3], 1e-6);
}

Source

  pub fn radiansToDegrees(ang: anytype) if (@TypeOf(ang) == comptime_int) comptime_float else @TypeOf(ang) {
    const T = @TypeOf(ang);
    switch (@typeInfo(T)) {
        .float, .comptime_float, .comptime_int => return ang * deg_per_rad,
        .vector => |V| if (@typeInfo(V.child) == .float) return ang * @as(T, @splat(deg_per_rad)),
        else => {},
    }
    @compileError("Input must be float or a comptime number, or a vector of floats.");
}  