avocado-old/packages/physics/shape-view.js

import {Color, Container, Primitives, Renderable} from '@avocado/graphics';

import {ShapeList} from './list';
import {CircleShape} from './circle';
import {PolygonShape} from './polygon';

export class ShapeView extends Renderable {

  constructor(shape) {
    super();
    this.container = new Container();
    this.shape = shape;
    if (shape instanceof PolygonShape) {
      this.redrawPolygonLines();
      shape.on('aabbChanged', this.onPolygonShapeAabbChanged, this);
    }
    if (shape instanceof CircleShape) {
      this.redrawCircle();
      shape.on('aabbChanged', this.onCircleShapeAabbChanged, this);
    }
    if (shape instanceof ShapeList) {
      for (const child of shape) {
        const childShapeView = new ShapeView(child);
        this.container.addChild(childShapeView);
      }
    }
    this.container.position = shape.position;
    shape.on('positionChanged', this.onShapePositionChanged, this);
  }

  destroy() {
    super.destroy();
    if (shape instanceof PolygonShape) {
      this.shape.off('aabbChanged', this.onPolygonShapeAabbChanged);
    }
    if (shape instanceof CircleShape) {
      this.shape.off('aabbChanged', this.onCircleShapeAabbChanged);
    }
    this.shape.off('aabbChanged', this.onShapePositionChanged);
  }

  get internal() {
    return this.container.internal;
  }

  onPolygonShapeAabbChanged() {
    this.redrawPolygonLines();
  }

  onCircleShapeAabbChanged() {
    this.redrawCircle();
  }

  onShapePositionChanged() {
    this.container.position = shape.position;
  }

  redrawCircle() {
    const primitives = new Primitives();
    primitives.drawCircle(
      this.shape.position,
      this.shape.radius,
      Primitives.lineStyle(new Color(255, 0, 255), 1),
    );
    this.container.removeAllChildren();
    this.container.addChild(primitives);
  }

  redrawPolygonLines() {
    const primitives = new Primitives();
    let firstVertice;
    let lastVertice;
    for (const vertice of this.shape) {
      if (!firstVertice) {
        firstVertice = vertice;
      }
      if (lastVertice) {
        primitives.drawLine(
          lastVertice,
          vertice,
          Primitives.lineStyle(new Color(255, 0, 255), 1),
        );
      }
      lastVertice = vertice;
    }
    primitives.drawLine(
      lastVertice,
      firstVertice,
      Primitives.lineStyle(new Color(255, 0, 255), 1),
    );
    this.container.removeAllChildren();
    this.container.addChild(primitives);
  }

}