인프런 커뮤니티 질문&답변
작성한 질문수
검은색 영역 애니메이션이 움직이지 않습니다.
작성
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안녕하세요 강의 잘 듣고 있습니다. 제가 강의를 보면서 따라하던 도중 이상하게 검은색 박스는 생기지만 옆으로 움직이면서 서서히 사라지는 부분이 안 됌니다. 그런데 아무리 찾아보아도 문제의 원인을 모르겠습니다.(제가 변수의 이름을 제가 알기 쉽게 바꾼게 몇개 존재합니다.)
(() => {
let yoffset = 0;
let prevScrollHeight = 0;//이전 스크롤 섹션의 높이를 담음
let currentScene = 0 //현재 활성화된 씬
let enterScene = false;
const sectionInfo = [
//0
{
type : 'sticky',
heightNum : 5,
height : 0,
objs : {
section : document.querySelector('#scroll-section-1'),
MessageA : document.querySelector('#scroll-section-1 .main-message.a'),
MessageB : document.querySelector('#scroll-section-1 .main-message.b'),
MessageC : document.querySelector('#scroll-section-1 .main-message.c'),
MessageD : document.querySelector('#scroll-section-1 .main-message.d'),
canvas : document.querySelector('#scroll-section-1 #first_canvas'),
ctx : document.querySelector('#scroll-section-1 #first_canvas').getContext('2d'),
},
values : {
//비디오 정보
img_values : 300,
img_obj : [],
imgeSequence : [0,300],
canvas_opacity : [1,0,{start : 0.9, end : 1}],
//투명도 조절
messageA_fade_in : [0,1,{start : 0.1, end : 0.2}],
messageB_fade_in : [0,1,{start : 0.3, end : 0.4}],
messageC_fade_in : [0,1,{start : 0.5, end : 0.6}],
messageA_fade_out : [1,0,{start : 0.25, end : 0.3}],
messageB_fade_out : [1,0,{start : 0.45, end : 0.5}],
messageC_fade_out : [1,0,{start : 0.65, end : 0.7}],
//transform 조절
messageA_transform_in : [20,0,{start: 0.1, end : 0.2}],
messageB_transform_in : [20,0,{start: 0.3, end : 0.4}],
messageC_transform_in : [20,0,{start: 0.5, end : 0.6}],
messageA_transform_out : [0,-20,{start: 0.25, end : 0.3}],
messageB_transform_out : [0,-20,{start: 0.45, end : 0.5}],
messageC_transform_out : [0,-20,{start: 0.65, end : 0.7}],
}
},
//1
{
type : 'normal',
heightNum : 5,
height : 0,
objs : {
section : document.querySelector('#scroll-section-2'),
},
values : {
}
},
//2
{
type : 'sticky',
heightNum : 5,
height : 0,
objs : {
section : document.querySelector('#scroll-section-3'),
desc_messageA: document.querySelector('#scroll-section-3 .desc-message.a'),
desc_messageB : document.querySelector('#scroll-section-3 .desc-message.b'),
desc_messageC : document.querySelector('#scroll-section-3 .desc-message.c'),
canvas : document.querySelector('#scroll-section-3 #second_canvas'),
ctx : document.querySelector('#scroll-section-3 #second_canvas').getContext('2d'),
},
values : {
img_values : 960,
img_obj : [],
imgeSequence : [0,960],
canvas_fade_in : [0,1, {start : 0.05, end : 0.1}],
canvas_fade_out : [1,0, {start : 0.9, end : 1}],
//투명도
desc_messageA_fade_in : [0 , 1, {start : 0.1, end : 0.2}],
desc_messageB_fade_in : [0 , 1, {start : 0.3, end : 0.4}],
desc_messageC_fade_in : [0 , 1, {start : 0.5, end : 0.6}],
desc_messageA_fade_out : [1 , 0, {start : 0.25, end : 0.3}],
desc_messageB_fade_out : [1 , 0, {start : 0.45, end : 0.5}],
desc_messageC_fade_out : [1 , 0, {start : 0.65, end : 0.7}],
//transform 조절
desc_messageA_transform_in : [20,0,{start : 0.1, end : 0.2}],
desc_messageB_transform_in : [20,0,{start : 0.3, end : 0.4}],
desc_messageC_transform_in : [20,0,{start : 0.5, end : 0.6}],
desc_messageA_transform_out : [0,-20,{start : 0.25, end : 0.3}],
desc_messageB_transform_out : [0,-20,{start : 0.45, end : 0.5}],
desc_messageC_transform_out : [0,-20,{start : 0.65, end : 0.7}],
}
},
//3
{
type : 'sticky',
heightNum : 5,
height : 0,
objs : {
section : document.querySelector('#scroll-section-4'),
mainMessageA : document.querySelector('mid-message.a'),
canvas : document.querySelector('#third_canvas'),
ctx : document.querySelector('#third_canvas').getContext('2d'),
},
values : {
imgsrc : [
'./images/blend-image-1.jpg',
'./images/blend-image-2.jpg'
],
discrimination : 0,
img_obj : [],
recet1X : [0,0, {start: 0, end: 0}],
recet2X : [0,0, {start: 0, end: 0}],
rectscrollY : 0,
}
}
]
function setHeight() {
yoffset = window.pageYOffset;
let totalHeight = 0; //각 섹션별 높이를 전부 담는 변수
const canvasRatio = window.innerHeight / 1080; //마지막 캔버스를 제외한 나머지 캔버스의 비율
for(let i = 0; i < sectionInfo.length; i++){
let sectionNum = sectionInfo[i];
let calcHeight = 0;
if( sectionNum.type === 'sticky' ){
calcHeight = window.innerHeight * sectionNum.heightNum;
sectionNum.height = calcHeight;
sectionNum.objs.section.style.height = `${calcHeight}px`
}else{
calcHeight = sectionInfo[i].objs.section.offsetHeight;
sectionNum.height = calcHeight;
}
sectionNum.objs.section.style.height = `${calcHeight}px`
}
for(let i = 0; i < sectionInfo.length; i++){
totalHeight += sectionInfo[i].height;
if( totalHeight >= window.pageYOffset){
currentScene = i;
break;
}
}
sectionInfo[0].objs.canvas.style.transform = `translate3d(-50%,-50%,0) scale(${canvasRatio})`;
sectionInfo[2].objs.canvas.style.transform = `translate3d(-50%,-50%,0) scale(${canvasRatio})`;
document.body.id = `show-scene-${currentScene}`;
}
function setCanvasImage() {
let imgElem;
let imgElem2;
let imgElem3;
for (let i = 0; i < sectionInfo[0].values.img_values; i++){
imgElem = new Image();
imgElem.src = `./video/001/IMG_${6726 + i}.jpg`;
sectionInfo[0].values.img_obj.push(imgElem);
}
for (let i = 0; i < sectionInfo[2].values.img_values; i++){
imgElem2 = new Image();
imgElem2.src = `./video/002/IMG_${7027 + i}.jpg`;
sectionInfo[2].values.img_obj.push(imgElem2);
}
for (let i = 0; i < sectionInfo[3].values.imgsrc.length; i++){
imgElem3 = new Image();
imgElem3.src = sectionInfo[3].values.imgsrc[i];
sectionInfo[3].values.img_obj.push(imgElem3);
}
}
setCanvasImage();
function scrollLoop() {
enterScene = false;
prevScrollHeight = 0;
for(let i = 0; i < currentScene; i++){
prevScrollHeight += sectionInfo[i].height;
}
if(yoffset > prevScrollHeight + sectionInfo[currentScene].height){
enterScene = true;
currentScene++;
document.body.id = `show-scene-${currentScene}`;
}
if ( yoffset < prevScrollHeight ){
if(yoffset < 0) return;
enterScene = true;
currentScene--;
document.body.id = `show-scene-${currentScene}`;
}
if ( enterScene ) return;
playAnimation();
}
//애니메이션 처리 값과 현재 씬에서의 스크롤 비율을 넘겨받음
function calcValues(values,currentYoffset){
let rv;//값을 계산해 리턴해줄 변수
const scrollHeight = sectionInfo[currentScene].height;
const scrollRatio = currentYoffset / sectionInfo[currentScene].height;//현재씬의 스크롤 비율
if ( values.length === 3 ){
//start ~ end 사이의 애니메이션 실행
const partScrollStart = values[2].start * scrollHeight;
const partScrollEnd = values[2].end * scrollHeight;
const partScrollHeight = partScrollEnd - partScrollStart;
if( currentYoffset >= partScrollStart && currentYoffset <= partScrollEnd ){
rv = (currentYoffset - partScrollStart) / partScrollHeight * (values[1] - values[0] ) + values[0];
}else if(currentYoffset < partScrollStart){
rv = values[0]
}
else if ( currentYoffset > partScrollEnd ){
rv = values[1];
}
}else{
rv = scrollRatio * (values[1] - values[0] ) + values[0];
}
return rv;
}
function playAnimation() {
const objs = sectionInfo[currentScene].objs;
const values = sectionInfo[currentScene].values;
const currentYoffset = yoffset - prevScrollHeight;
const scrollHeight = sectionInfo[currentScene].height;
const scrollRatio = currentYoffset / scrollHeight;
switch(currentScene){
case 0:
if ( scrollRatio <= 0.22 ){
objs.MessageA.style.opacity = calcValues(values.messageA_fade_in,currentYoffset);
objs.MessageA.style.transform = `translateY(${calcValues(values.messageA_transform_in,currentYoffset)}%)`;
}
else{
objs.MessageA.style.opacity = calcValues(values.messageA_fade_out,currentYoffset);
objs.MessageA.style.transform = `translateY(${calcValues(values.messageA_transform_out,currentYoffset)}%)`;
}
if(scrollRatio < 0.43){
objs.MessageB.style.opacity = calcValues(values.messageB_fade_in,currentYoffset);
objs.MessageB.style.transform = `translateY(${calcValues(values.messageB_transform_in,currentYoffset)}%)`;
}else{
objs.MessageB.style.opacity = calcValues(values.messageB_fade_out,currentYoffset);
objs.MessageB.style.transform = `translateY(${calcValues(values.messageB_transform_out,currentYoffset)}%)`;
}
if( scrollRatio < 0.63 ){
objs.MessageC.style.opacity = calcValues(values.messageC_fade_in,currentYoffset);
objs.MessageC.style.transform = `translateY(${calcValues(values.messageC_transform_in,currentYoffset)}%)`;
}else{
objs.MessageC.style.opacity = calcValues(values.messageC_fade_out,currentYoffset);
objs.MessageC.style.transform = `translateY(${calcValues(values.messageC_transform_out,currentYoffset)}%)`;
}
let imgeSequence = Math.floor(calcValues(sectionInfo[0].values.imgeSequence,currentYoffset));
objs.ctx.drawImage(values.img_obj[imgeSequence],0,0);
objs.canvas.style.opacity = calcValues(values.canvas_opacity,currentYoffset);
break;
case 1:
break;
case 2:
if( scrollRatio <= 0.22 ){
objs.desc_messageA.style.opacity = calcValues(values.desc_messageA_fade_in,currentYoffset);
objs.desc_messageA.style.transform = `translate3d(-50%, ${calcValues(values.desc_messageA_transform_in,currentYoffset)}%, 0)`;
}
else{
objs.desc_messageA.style.opacity = calcValues(values.desc_messageA_fade_out,currentYoffset);
objs.desc_messageA.style.transform = `translate3d(-50%, ${calcValues(values.desc_messageA_transform_out,currentYoffset)}%, 0)`;
}
if ( scrollRatio < 0.42 ){
objs.desc_messageB.style.opacity = calcValues(values.desc_messageB_fade_in,currentYoffset);
objs.desc_messageB.style.transform = `translate3d(-50%, ${calcValues(values.desc_messageB_transform_in,currentYoffset)}%, 0)`;
}else{
objs.desc_messageB.style.opacity = calcValues(values.desc_messageB_fade_out,currentYoffset);
objs.desc_messageB.style.transform = `translate3d(-50%, ${calcValues(values.desc_messageB_transform_out,currentYoffset)}%, 0)`;
}
if ( scrollRatio < 0.62 ){
objs.desc_messageC.style.opacity = calcValues(values.desc_messageC_fade_in,currentYoffset);
objs.desc_messageC.style.transform = `translate3d(-50%, ${calcValues(values.desc_messageC_transform_in,currentYoffset)}%, 0)`;
}else{
objs.desc_messageC.style.opacity = calcValues(values.desc_messageC_fade_out,currentYoffset);
objs.desc_messageC.style.transform = `translate3d(-50%, ${calcValues(values.desc_messageC_transform_out,currentYoffset)}%, 0)`;
}
if(scrollRatio < 0.5){
objs.canvas.style.opacity = calcValues(values.canvas_fade_in,currentYoffset);
}else{
objs.canvas.style.opacity = calcValues(values.canvas_fade_out,currentYoffset);
}
let imageSequence2 = Math.floor(calcValues(values.imgeSequence,currentYoffset));
objs.ctx.drawImage(values.img_obj[imageSequence2],0,0);
break;
case 3:
const widthRatio = window.innerWidth / objs.canvas.width;
const heightRatio = window.innerHeight / objs.canvas.height;
if ( widthRatio <= heightRatio ){
objs.canvas.style.transform = `scale(${heightRatio})`;
}else{
objs.canvas.style.transform = `scale(${widthRatio})`;
}
const newWidth = document.body.offsetWidth / widthRatio//안쪽의 content영역의 width값을 구하기 위한 계산
const newheight = window.innerHeight / heightRatio//안쪽의 content영역의 높이를 구하기 위한 계산
const blockArea = newWidth * 0.15;
values.recet1X[0] = (objs.canvas.width - newWidth) / 2; // 애니메이션 시작 지점을 계산
values.recet1X[1] = values.recet1X[0] - blockArea;//애니메이션 끝 지점을 계산
values.recet2X[0] = (values.recet1X[0] + newWidth) - blockArea; // 오른쪽 블록의 애니메이션 시작지점을 계산
values.recet2X[1] = values.recet2X[1] + blockArea//오른쪽 애니메이션의 끝 지점을 지정
if(!values.rectscrollY){
values.rectscrollY = objs.canvas.getBoundingClientRect().top;
values.recet1X[2].end = values.rectscrollY / scrollHeight;
values.recet2X[2].end = values.rectscrollY / scrollHeight;
}
objs.ctx.fillRect(
parseInt(calcValues(values.recet1X, currentYoffset)),
0,
parseInt(blockArea),
objs.canvas.height
);
objs.ctx.fillRect(
parseInt(calcValues(values.recet2X, currentYoffset)),
0,
parseInt(blockArea),
objs.canvas.height
);
break;
}
}
window.addEventListener('resize',setHeight);
window.addEventListener('scroll',() => {
yoffset = window.pageYOffset;
scrollLoop()
});
window.addEventListener('load',() => {
setHeight();
sectionInfo[0].objs.ctx.drawImage(sectionInfo[0].values.img_obj[0],0,0);
sectionInfo[3].objs.ctx.drawImage(sectionInfo[3].values.img_obj[0],0,0);
});
})();답변
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