"use strict"; // 參考 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode
////////////////////////////////////////////////////////////////////////////////
// 時鐘作業：正確地旋轉指針
////////////////////////////////////////////////////////////////////////////////

var camera, scene, renderer;
var cameraControls, effectController;
var clock = new THREE.Clock();
var gridX = false;
var gridY = false;
var gridZ = false;
var axes = true;
var ground = true;

function fillScene() {
	scene = new THREE.Scene();
	scene.fog = new THREE.Fog( 0x808080, 2000, 4000 );

// 光源
	var ambientLight = new THREE.AmbientLight( 0x222222 );

var light = new THREE.DirectionalLight( 0xFFFFFF, 1.0 );
	light.position.set( 200, 400, 500 );

var light2 = new THREE.DirectionalLight( 0xFFFFFF, 1.0 );
	light2.position.set( -500, 250, -200 );

scene.add(ambientLight);
	scene.add(light);
	scene.add(light2);

// 時鐘
	var clock = new THREE.Mesh(
		new THREE.CylinderGeometry( 75, 75, 10, 32 ), faceMaterial );
	clock.position.y = 5;
	scene.add( clock );

// 標記
	var cube = new THREE.Mesh(
		new THREE.CubeGeometry( 20, 4, 15 ), mark12Material );
	cube.position.x = 60;
	cube.position.y = 9;
	scene.add( cube );

cube = new THREE.Mesh(
		new THREE.CubeGeometry( 10, 4, 10 ), markMaterial );
	cube.position.x = -60;
	cube.position.y = 9;
	scene.add( cube );

cube = new THREE.Mesh(
		new THREE.CubeGeometry( 10, 4, 10 ), markMaterial );
	cube.position.z = 60;
	cube.position.y = 9;
	scene.add( cube );

cube = new THREE.Mesh(
		new THREE.CubeGeometry( 10, 4, 10 ), markMaterial );
	cube.position.z = -60;
	cube.position.y = 9;
	scene.add( cube );

// 你的程式寫在這裡：
	// 時鐘指針的大小與方向是對的
	// 你只要找出施加座標變換的正確順序
	cube = new THREE.Mesh(
		new THREE.CubeGeometry( 70, 4, 4 ), minuteHandMaterial );
	cube.position.y = 14;
	cube.position.x = 70/2 - 10;
	cube.rotation.y = -60 * Math.PI/180;
	scene.add( cube );

var sphere = new THREE.Mesh(
		new THREE.SphereGeometry( 0.5, 32, 16 ), hourHandMaterial );
	sphere.position.y = 18;	// 將一個時鐘指針移到另一個之上
	sphere.position.x = 50/2 - 10;
	sphere.rotation.y = 30 * Math.PI/180;
	sphere.scale.x = 50;
	sphere.scale.y = 4;
	sphere.scale.z = 4;

scene.add( sphere );
}

function init() {
	var canvasWidth = window.innerWidth;
	var canvasHeight = window.innerHeight;
	var canvasRatio = canvasWidth / canvasHeight;

// RENDERER
	renderer = new THREE.WebGLRenderer( { antialias: true } );
	renderer.gammaInput = true;
	renderer.gammaOutput = true;
	renderer.setSize(canvasWidth, canvasHeight);
	renderer.setClearColorHex( 0xAAAAAA, 1.0 );

// 攝影機
	camera = new THREE.PerspectiveCamera( 30, canvasRatio, 1, 10000 );
	camera.position.set( -420, 400, 100 );

// 控制
	cameraControls = new THREE.OrbitAndPanControls(camera, renderer.domElement);
	cameraControls.target.set(0,0,0);

fillScene();
}

function addToDOM() {
	var container = document.getElementById('container');
	var canvas = container.getElementsByTagName('canvas');
	if (canvas.length>0) {
		container.removeChild(canvas[0]);
	}
	container.appendChild( renderer.domElement );
}

function animate() {
	window.requestAnimationFrame(animate);
	render();
}

function render() {
	var delta = clock.getDelta();
	cameraControls.update(delta);

if ( effectController.newGridX !== gridX || effectController.newGridY !== gridY || effectController.newGridZ !== gridZ || effectController.newGround !== ground || effectController.newAxes !== axes)
	{
		gridX = effectController.newGridX;
		gridY = effectController.newGridY;
		gridZ = effectController.newGridZ;
		ground = effectController.newGround;
		axes = effectController.newAxes;

fillScene();
		drawHelpers();
	}
	renderer.render(scene, camera);
}

function setupGui() {
	effectController = {
		newGridX: gridX,
		newGridY: gridY,
		newGridZ: gridZ,
		newGround: ground,
		newAxes: axes
	};

var gui = new dat.GUI();
	gui.add( effectController, "newGridX").name("顯示 XZ 格線");
	gui.add( effectController, "newGridY" ).name("顯示 YZ 格線");
	gui.add( effectController, "newGridZ" ).name("顯示 XY 格線");
	gui.add( effectController, "newGround" ).name("顯示地面");
	gui.add( effectController, "newAxes" ).name("顯示軸線");
}