Macro scad_generator::qstruct

macro_rules! qstruct {
    ($name:ident
    ($($param_name:ident: $param_type:ty),*$(),+)
    {
        $($mem_name:ident : $mem_type:ty = $mem_value:expr),*$(),+
    }) => { ... };
}

Used to create structs with ::new functions that set default values without having to write an impl for new.

This exists because a lot of times when making scad models, you want to have a lot of parameters with fixed values. qstruct! also supports adding parameters to the new function of the struct for the members that should be changeable.

Usage

The qstruct starts with the name of the resulting struct, followed by a list of parameters to the new() function inside (). After that, the member variables are listed inside {} and separated by ,. Each member should have a name, followed by the
type followed by the value. The value is any valid rust expression and can contain any variables that are in the struct, or parameters to the new function.

qstruct!(Demo(inner_width: f32)
{
    //Constant value
    shell_thickness: f32 = 1.,

    //Value based on function parameter
    outer_width: f32 = inner_width + shell_thickness,

    //Value that depends on another member
    outer_height: f32 = outer_width / 2.,
});

//Add your own functions to the struct
impl Demo
{
    pub fn get_outer(&self) -> ScadObject 
    {
        scad!(Cube(vec3(self.outer_width, self.outer_width, self.outer_height)))
    }
}