cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

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              body {
  touch-action: none;
}

#view {
  position: fixed;
  top: 0;
  left: 0;
}
            
          
!
            
              console.clear();


//
// EDGE
// ===========================================================================
class Edge {
  
  constructor(public p1 = new PIXI.Point(), public p2 = new PIXI.Point()) {
    
  }
  
  intersects(edge, asSegment = true, point = new PIXI.Point()) {
    
    const a = this.p1;
    const b = this.p2;
    const e = edge.p1;
    const f = edge.p2;
    
    const a1 = b.y - a.y;
    const a2 = f.y - e.y;
    const b1 = a.x - b.x;
    const b2 = e.x - f.x;
    const c1 = (b.x * a.y) - (a.x * b.y);
    const c2 = (f.x * e.y) - (e.x * f.y);
    const denom = (a1 * b2) - (a2 * b1);
    
    if (denom === 0) {
      return null;
    }
       
    point.x = ((b1 * c2) - (b2 * c1)) / denom;
    point.y = ((a2 * c1) - (a1 * c2)) / denom;

    if (asSegment) {
      const uc = ((f.y - e.y) * (b.x - a.x) - (f.x - e.x) * (b.y - a.y));
      const ua = (((f.x - e.x) * (a.y - e.y)) - (f.y - e.y) * (a.x - e.x)) / uc;
      const ub = (((b.x - a.x) * (a.y - e.y)) - ((b.y - a.y) * (a.x - e.x))) / uc;

      if (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1) {
        return point;
      } else {
        return null;
      }
    }

    return point;
  }
}


//
// COLLISION SHAPE
// ===========================================================================
class CollisionShape {
  
  edges = [];
  points = [];
  AABB = new PIXI.Rectangle();
  bounds = new PIXI.Bounds();
  intersectionPoint = new PIXI.Point();
  
  constructor(public target, public vertices = []) {
                
    for (let i = 0; i < vertices.length; i++) {      
      
      const p1 = vertices[i];
      const p2 = vertices[i+1] || vertices[0];
      this.points.push(p1.clone());  
      this.edges.push(new Edge(p1, p2));
    }
    
    this.update();
  }
  
  update() {
    
    const transform = this.target.transform.worldTransform; 
    const vertices = this.vertices;
    const points = this.points;
    const bounds = this.bounds;
    
    bounds.clear();
    
    for (let i = 0; i < points.length; i++) {
      
      const vertex = transform.apply(points[i], vertices[i]);
      bounds.addPoint(vertex);
    }
    
    bounds.getRectangle(this.AABB);
  }
  
  intersectsAABB(shape) {
    
    const a = this.bounds;
    const b = shape.bounds;
    
    return !(
      a.maxX < b.minX ||
      a.maxY < b.minY ||
      a.minX > b.maxX ||
      a.minY > b.maxY
    );
  }
    
  intersectsShape(shape) {
    
    const edges1 = this.edges;
    const edges2 = shape.edges;
    
    for (let i = 0; i < edges1.length; i++) {
      
      const edge1 = edges1[i];
      
      for (let j = 0; j < edges2.length; j++) {
        
        const edge2 = edges2[j];
        if (edge1.intersects(edge2, true, this.intersectionPoint)) {
          return true;
        }
      }
    }
    
    return false;
  }
}


//
// APPLICATION
// ===========================================================================
const COLLISION = {
  NONE: 0x4caf50,
  AABB: 0x2196F3,
  SHAPE: 0xf44336
};

let vw = window.innerWidth;
let vh = window.innerHeight;

const app = new PIXI.Application({
  view: document.querySelector("#view"),
  width: vw,
  height: vh
});

const sprites = [];
const container = new PIXI.Container();

for (let i = 0; i < 10; i++) {  
  sprites.push(createSprite());
}

const text = new PIXI.Text("Drag the shapes around", {
  fill: "rgba(255,255,255,0.9)",
  fontSize: 16
});

text.position.set(12);

const graphics = new PIXI.Graphics();
app.stage.addChild(container, graphics, text);
app.ticker.add(update);
window.addEventListener("resize", onResize);


//
// CREATE SPRITE
// ===========================================================================
function createSprite() {
  
  const sides = random(4, 16) | 0;
  const step = Math.PI * 2 / sides;
  const points = [];
  
  let minX = Infinity;
  let minY = Infinity;
  
  for (let i = 0; i < sides - 1; i++) {
    
    const theta = (step * i) + random(step);
    const radius = random(100, 160);
    
    const x = radius * Math.cos(theta);
    const y = radius * Math.sin(theta);
    
    minX = Math.min(minX, x);
    minY = Math.min(minY, y);
    
    points.push(new PIXI.Point(x, y));
  }
  
  points.forEach(point => {
    point.x = point.x - minX;
    point.y = point.y - minY;
  });
  
  const graphics = new PIXI.Graphics()
    .beginFill(0xffffff)
    .drawPolygon(points)
    .endFill()
  
  const sprite = new PIXI.Sprite(graphics.generateCanvasTexture());
  
  sprite.alpha = 0.6;  
  sprite.x = random(100, vw - 100);
  sprite.y = random(100, vh - 100);
  sprite.pivot.x = sprite.width * 0.5;
  sprite.pivot.y = sprite.height * 0.5;
  sprite.rotation = random(Math.PI * 2);
  sprite.scale.set(random(0.4, 1)); 
  
  sprite.hitArea = new PIXI.Polygon(points);
  sprite.shape = new CollisionShape(sprite, points);  
  sprite.collisionID = 1;
  sprite.collision = COLLISION.NONE;
  sprite.tint = sprite.collision;
  
  sprite.dragging = false;
  sprite.newPosition = new PIXI.Point();
  sprite.lastPosition = new PIXI.Point();
  
  sprite.interactive = true;
  sprite.buttonMode = true;
  sprite
    .on("pointerdown", onDragStart)
    .on("pointerup", onDragEnd)
    .on("pointerupoutside", onDragEnd)
    .on("pointermove", onDragMove);
  
  graphics.destroy();
  container.addChild(sprite);
  
  return sprite;
}


//
// DETECT COLLISIONS
// ===========================================================================
function detectCollisions() {
  
  container.updateTransform();
  
  for (let i = 0; i < sprites.length; i++) {    
    
    const sprite = sprites[i];
    sprite.collision = COLLISION.NONE;
    
    if (sprite.collisionID) {
      sprite.shape.update();
      sprite.collisionID = 0;
    }
  }
  
  for (let i = 0; i < sprites.length; i++) {
    
    const sprite1 = sprites[i];
    
    for (let j = i + 1; j < sprites.length; j++) {
      
      const sprite2 = sprites[j];
      
      // Check for AABB intersections to determine what shapes might be overlapping 
      if (sprite1.shape.intersectsAABB(sprite2.shape)) {
        
        if (sprite1.collision === COLLISION.NONE) {
          sprite1.collision = COLLISION.AABB;
        }
        
        if (sprite2.collision === COLLISION.NONE) {
          sprite2.collision = COLLISION.AABB;
        }

        if (sprite1.shape.intersectsShape(sprite2.shape)) {
          sprite1.collision = COLLISION.SHAPE;
          sprite2.collision = COLLISION.SHAPE;
        }
      }
      
      sprite2.tint = sprite2.collision;
    }
    
    sprite1.tint = sprite1.collision;
  }
}


//
// UPDATE
// ===========================================================================
function update() {
  
  detectCollisions();
  
  graphics
    .clear()
    .lineStyle(1, 0xffffff, 0.8)

  for (let i = 0; i < sprites.length; i++) {    
    const box = sprites[i].shape.AABB;
    graphics.drawRect(box.x, box.y, box.width, box.height);
  }  
}


//
// DRAG EVENTS
// ===========================================================================
function onDragStart(event) {
  
  this.dragging = true;
  this.dragData = event.data;  
  this.lastPosition = this.dragData.getLocalPosition(this.parent, this.lastPosition); 
}

function onDragMove(event) {
  
  if (this.dragging) {
    
    const newPosition = this.dragData.getLocalPosition(this.parent, this.newPosition);    
    this.position.x += (newPosition.x - this.lastPosition.x);
    this.position.y += (newPosition.y - this.lastPosition.y);
    this.lastPosition.copy(newPosition);        
    this.collisionID++;
  } 
}

function onDragEnd(event) {
  
  this.dragData = null;
  this.dragging = false;
}

function onResize() {
  vw = window.innerWidth;
  vh = window.innerHeight;
  app.renderer.resize(vw, vh);
}

function random(min, max) {
  if (max == null) { max = min; min = 0; }
  if (min > max) { var tmp = min; min = max; max = tmp; }
  return min + (max - min) * Math.random();
}
            
          
!
999px
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