hypeDocument.queryIntersections

hypeDocument.queryIntersections.js

/**
 * Query intersections between elements using Matter.js
 *
 * @param {Node} sourceElm The source element used in each check
 * @param {Nodelist} targetElms The target elements to query against
 * @return {Nodelist} Returns a list of targetElms that intersect with sourceElm
 */
hypeDocument.queryIntersections = function(sourceElm, targetElms) {
	var sourceBody = hypeDocument.getElementProperty(sourceElm, 'physics-body');
	if (sourceBody) {
		var targetBodies = [];
		targetElms.forEach(function(elm){
			var elmBody = hypeDocument.getElementProperty(elm, 'physics-body');
			if (elmBody) {
				targetBodies.push(elmBody);
			} else {
				console.log('target '+elm.id+' must have static Physics enabled');
			}
		});
		var collisions = Matter.Query.collides(sourceBody, targetBodies);
		if (collisions.length) {
			return collisions.map(function(collision){
				var isB = sourceElm.id == collision.bodyB.elementId;
				return document.getElementById((isB? collision.bodyA : collision.bodyB).elementId);
			});
		}
	} else {
		console.log('sourceElm must have static Physics enabled');
	}
	return [];
}