Struct myelin_engine::object_builder::ObjectBuilder

pub struct ObjectBuilder<T> { /* fields omitted */ }

ObjectDescription factory, which can be used in order to configure the properties of a new object. Methods can be chained on it in order to configure it.

If associated_data is never called and T implements Default, then the default value is used. Otherwise build will return an error.

Examples

use myelin_engine::prelude::*;
use std::f64::consts::FRAC_PI_2;

let object = ObjectBuilder::<()>::default()
    .shape(
        PolygonBuilder::default()
            .vertex(-50.0, -50.0)
            .vertex(50.0, -50.0)
            .vertex(50.0, 50.0)
            .vertex(-50.0, 50.0)
            .build()
            .unwrap(),
    )
    .location(300.0, 450.0)
    .rotation(Radians::try_new(FRAC_PI_2).unwrap())
    .mobility(Mobility::Movable(Vector { x: 3.0, y: 5.0 }))
    .build()
    .unwrap();

Methods

impl<T> ObjectBuilder<T>

pub fn shape(&mut self, polygon: Polygon) -> &mut Self

Examples

use myelin_engine::prelude::*;

ObjectBuilder::<()>::default().shape(
    PolygonBuilder::default()
        .vertex(-50.0, -50.0)
        .vertex(50.0, -50.0)
        .vertex(50.0, 50.0)
        .vertex(-50.0, 50.0)
        .build()
        .unwrap(),
);

pub fn location(&mut self, x: f64, y: f64) -> &mut Self

Examples

use myelin_engine::prelude::*;

ObjectBuilder::<()>::default().location(3.0, 2.0);

pub fn mobility(&mut self, mobility: Mobility) -> &mut Self

Examples

use myelin_engine::prelude::*;

ObjectBuilder::<()>::default().mobility(Mobility::Movable(Vector { x: -12.0, y: 4.0 }));

pub fn rotation(&mut self, rotation: Radians) -> &mut Self

Examples

use myelin_engine::prelude::*;

ObjectBuilder::<()>::default().rotation(Radians::try_new(4.5).unwrap());

pub fn passable(&mut self, passable: bool) -> &mut Self

Examples

use myelin_engine::prelude::*;

let builder = ObjectBuilder::<()>::default();

pub fn associated_data(&mut self, associated_data: T) -> &mut Self

Examples

use myelin_engine::prelude::*;

let builder = ObjectBuilder::<String>::default().associated_data(String::from("Foo"));

pub fn build(&mut self) -> Result<ObjectDescription<T>, ObjectBuilderError>

Build the ObjectDescription with all specified settings

Errors

If a non-optional member has not specified while building an error is returned, containing flags specifying which setting has been omitted

Examples

use myelin_engine::prelude::*;
use std::f64::consts::FRAC_PI_2;

let object = ObjectBuilder::<()>::default()
    .shape(
        PolygonBuilder::default()
            .vertex(-50.0, -50.0)
            .vertex(50.0, -50.0)
            .vertex(50.0, 50.0)
            .vertex(-50.0, 50.0)
            .build()
            .unwrap(),
    )
    .location(300.0, 450.0)
    .rotation(Radians::try_new(FRAC_PI_2).unwrap())
    .mobility(Mobility::Movable(Vector { x: 3.0, y: 5.0 }))
    .build()
    .unwrap();

Trait Implementations

impl<T> From<ObjectDescription<T>> for ObjectBuilder<T>

fn from(object_description: ObjectDescription<T>) -> Self

Performs the conversion.

impl<T> Default for ObjectBuilder<T>

fn default() -> Self

Returns the "default value" for a type.

impl<T: Debug> Debug for ObjectBuilder<T>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.