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use super::Mappable;
use crate::math::{self, Rect, Polygon, Triangle, Vec2};
use crate::scaleable::Scaleable;
use crate::transform::Transform;
use raylib::drawing::{RaylibDraw, RaylibDrawHandle};
use raylib::ffi::Color;
pub type PolygonRoomData = Polygon<f64>;
pub struct PolygonRoom {
data: PolygonRoomData,
// The polygon shape, but in triangles, so the polygon does not have to be triangulated every frame.
triangulated: Vec<Triangle<f64>>,
}
impl PolygonRoom {
pub fn from_data(data: PolygonRoomData) -> Self {
Self {
data: data.clone(),
triangulated: math::triangulate(data)
}
}
fn retriangulate(&mut self) {
self.triangulated = math::triangulate(self.data.clone());
}
}
impl Mappable for PolygonRoom {
fn draw(&self, rld: &mut RaylibDrawHandle, transform: &Transform) {
for triangle in &self.triangulated {
rld.draw_triangle(
transform.point_m_to_px(&triangle.corners()[0]),
transform.point_m_to_px(&triangle.corners()[1]),
transform.point_m_to_px(&triangle.corners()[2]),
Color {
r: 180,
g: 180,
b: 180,
a: 255,
},
)
}
}
fn bounding_rect(&self) -> Rect<f64> {
Rect::bounding_rect_n(&self.data.corners())
}
fn as_scaleable(&self) -> Option<&dyn Scaleable> {
Some(self as &dyn Scaleable)
}
}
impl Scaleable for PolygonRoom {
fn scale(&mut self, by: &Vec2<f64>) {
if by.x < 0. || by.y < 0. {
panic!("Cannot set dimensions with negative size");
}
for corner in self.data.corners_mut() {
corner.x *= by.x;
corner.y *= by.y;
}
self.retriangulate();
}
}
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