Code.txt

// Include this https://labs.gooengine.com/goochess/js/ToledoChess2.js

function mod(v, n) {
	return (v % n + n) % n;
}

function getParent( ent, times) {
	for( var i=0; i<times; i++) {
		if( ent.transformComponent.parent)
			ent = ent.transformComponent.parent.entity;
	}
	return ent;
}

function getToledoChessPos( x, z) {
	x = x - mod(x, 2.5) + 1.25;
	z = z - mod(z, 2.5) + 1.25;
	x = (x / 1.25 + 7)/2;
	z = (-z / 1.25 + 7)/2;
	return (9-z)*10 + x+1;
}

function get3DPos( toledoChessPos ) {
	var t = toledoChessPos;
	var file = 9 - Math.floor(t/10);
	var rank = (t%10)-1
	var x = (rank*2-7)*1.25;
	var z = -(file*2-7)*1.25;
	return [ x, 1, z ];
}

function containsPoint( box, point) {
	return  box.center.x + box.xExtent > point[0] && box.center.x - box.xExtent < point[0] &&
			box.center.y + box.yExtent > point[1] && box.center.y - box.yExtent < point[1] &&
			box.center.z + box.zExtent > point[2] && box.center.z - box.zExtent < point[2];
}

function getEntityAt( ctx, point) {
	var found;
	ctx.world.getEntities().forEach(function(entity) {
		if( entity.meshRendererComponent && containsPoint( entity.meshRendererComponent.worldBound, point)) {
			if( entity.name != 'Torus')
				found = entity;
		}
	});
	return found;
}

var setup = function(args, ctx, goo) {
	
	var toledoChess = getToledoChess();
	toledoChess.aiCallback = function(player, from, to) {
		console.log( player, from, to);
		
		var fromPiece = getParent( getEntityAt( ctx, get3DPos( from)), 2);
		var to3D = get3DPos( to);
		
		var toEntity = getEntityAt( ctx, to3D);
		if( toEntity) {
			getParent( toEntity, 2).removeFromWorld();						
		}
		
		to3D[1] = 0.5;
		ctx.world.by.name('Torus').first().setTranslation(to3D);
		to3D[1] = fromPiece.getTranslation().y;
		fromPiece.setTranslation( to3D);

	}
	
	toledoChess.checkmateCallback = function(player) {
		var cm = ctx.world.by.name('Checkmate').first();
		cm.hidden = false;
		cm.htmlComponent.hidden = false;
		var text;
		if(player>0) {
			text = '<p style="background:white; font-size:18px;padding:4px;margin:0;border-radius:3px">Checkmate, you won !</p>';
		} else {
			text = '<p style="background:white; font-size:18px;padding:4px;margin:0;border-radius:3px">Checkmate, you lost !</p>';
		}
		cm.htmlComponent.domElement.innerHTML = text;

	}

	ctx.worldData.mc = function (e) {
		ctx.world.gooRunner.pick( e.offsetX, e.offsetY, function (index, depth) {
			if( index < 0)
				return;

			var clicked = ctx.world.entityManager.getEntityByIndex(index);
			if( clicked.name == 'Board') { // board
				var camera = ctx.activeCameraEntity.cameraComponent.camera;
				var pos = camera.getWorldPosition( e.offsetX, e.offsetY, ctx.viewportWidth, ctx.viewportHeight, depth);

				toledoChess.OnClick( getToledoChessPos( pos.x, pos.z));
				
				pos.x = pos.x - mod(pos.x, 2.5) + 1.25;
				pos.y = 0.5;
				pos.z = pos.z - mod(pos.z, 2.5) + 1.25;
				ctx.world.by.name('Torus').first().setTranslation(pos);
				
			} else {
				var s = getParent( clicked, 2);
				var t = s.getTranslation();
				toledoChess.OnClick( getToledoChessPos(t.x, t.z));
				ctx.world.by.name('Torus').first().setTranslation( t.x, 0.5, t.z);
				
				//entity.meshRendererComponent.materials[0].uniforms.materialAmbient = [1,0,0,0];
			}
		});	
	}
	document.body.addEventListener('mousedown', ctx.worldData.mc, false);
};

var cleanup = function(args, ctx, goo) {
	document.body.removeEventListener('mousedown', ctx.worldData.mc, false);
};

var update = function(args, ctx, goo) {
};

var parameters = [];