Możesz rozważyć border-radius
. Oto podstawowy przykład, który możesz poprawić
.box {
height:100px;
margin-top:50px;
border:10px solid transparent;
border-bottom:10px solid red;
width:100px;
animation:
loop 5s infinite alternate linear,
radius 5s infinite alternate linear;
}
@keyframes loop{
0% {
transform:translateX(0);
}
40% {
transform:translateX(100px) rotate(0deg);
}
60% {
transform:translateX(100px) rotate(-360deg);
}
100% {
transform:translateX(200px) rotate(-360deg);
}
}
@keyframes radius{
0%,28% {
border-radius:0%
}
35%,38% {
border-bottom-right-radius:50%;
border-bottom-left-radius:0%;
}
45%,55% {
border-radius:50%
}
62%,65% {
border-bottom-right-radius:0%;
border-bottom-left-radius:50%;
}
70%,100% {
border-radius:0%
}
}
<div class="box"></div>
Kolejny szalony pomysł, w którym możesz animować prostokątny kształt za przezroczystą zakrzywioną ścieżką:
.box {
height: 165px;
width: 315px;
position: relative;
border-radius: 0 100px 100px 0;
animation: hide 3s infinite linear alternate;
overflow:hidden;
}
.box:after {
content: "";
display:block;
height: 100%;
background: white padding-box;
border-radius: inherit;
border: 15px solid transparent;
border-left:0;
box-sizing: border-box;
}
.alt {
margin-top: -165px;
transform: scaleX(-1);
transform-origin: 170px 0;
animation-direction: alternate-reverse;
}
.box:before {
content: "";
position: absolute;
z-index: -1;
width: 90px;
height: 90px;
background: blue;
bottom: -40px;
animation: loop 3s infinite linear alternate;
transform-origin: 50% -20px;
}
.alt:before {
animation-direction: alternate-reverse;
}
@keyframes loop {
15% {
transform: translateX(180px) rotate(0deg);
}
40% {
transform: translateX(180px) rotate(-180deg);
}
50%,100% {
transform: translateX(125px) rotate(-180deg);
}
}
@keyframes hide {
0%,50% {
visibility: visible;
}
50.2%,100% {
visibility: hidden;
}
}
<div class="box"></div>
<div class="box alt"></div>
Zoptymalizowana wersja z mniejszą ilością kodu i przezroczystością (weźmie pod mask
uwagę to)
.box {
height: 165px;
width: 315px;
position: relative;
border-radius: 0 100px 100px 0;
animation: hide 3s infinite linear alternate;
overflow:hidden;
-webkit-mask:
linear-gradient(#fff,#fff) top left /235px 15px,
linear-gradient(#fff,#fff) bottom left/235px 15px,
radial-gradient(farthest-side at left,transparent calc(100% - 15px),#fff 0) right/100px 100%;
-webkit-mask-repeat:no-repeat;
mask:
linear-gradient(#fff,#fff) top left/235px 15px,
linear-gradient(#fff,#fff) bottom left/235px 15px,
radial-gradient(farthest-side at left,transparent calc(100% - 15px),#fff 0) right/100px 100%;
mask-repeat:no-repeat;
}
.alt {
margin-top: -165px;
transform: scaleX(-1);
transform-origin: 170px 0;
animation-direction: alternate-reverse;
}
.box:before {
content: "";
position: absolute;
width: 90px;
height: 90px;
background: blue;
bottom: -40px;
animation: loop 3s infinite linear alternate;
transform-origin: 50% -20px;
}
.alt:before {
animation-direction: alternate-reverse;
}
@keyframes loop {
15% {
transform: translateX(180px) rotate(0deg);
}
40% {
transform: translateX(180px) rotate(-180deg);
}
50%,100% {
transform: translateX(125px) rotate(-180deg);
}
}
@keyframes hide {
0%,50% {
visibility: visible;
}
50.2%,100% {
visibility: hidden;
}
}
body {
background:linear-gradient(to right,yellow,gray);
}
<div class="box"></div>
<div class="box alt"></div>
Kolejna wersja z mniejszą liczbą pikseli i zmiennymi CSS, w której możesz łatwo dostosować wszystko.
Uruchom fragment kodu na całej stronie i baw się ze wszystkimi podstawkami!
.box {
--w:400px; /* Total width of the coaster */
--h:180px; /* Height of the coaster */
--b:90px; /* width of the small bar */
--t:15px; /* height of the small bar */
--c:blue; /* Color of the small bar */
width:var(--w);
height:var(--h);
}
.box > div {
height: 100%;
position:relative;
width: calc(50% + var(--h)/2 + var(--b)/2);
border-radius: 0 1000px 1000px 0;
animation: hide 3s infinite linear alternate;
-webkit-mask:
linear-gradient(#fff,#fff) top left /calc(100% - var(--h)/2) var(--t),
linear-gradient(#fff,#fff) bottom left/calc(100% - var(--h)/2) var(--t),
radial-gradient(farthest-side at left,transparent calc(100% - var(--t)),#fff 0) right/calc(var(--h)/2) 100%;
-webkit-mask-repeat:no-repeat;
mask:
linear-gradient(#fff,#fff) top left /calc(100% - var(--h)/2) var(--t),
linear-gradient(#fff,#fff) bottom left/calc(100% - var(--h)/2) var(--t),
radial-gradient(farthest-side at left,transparent calc(100% - var(--t)),#fff 0) right/calc(var(--h)/2) 100%;
mask-repeat:no-repeat;
}
.box > div:last-child {
margin-top:calc(-1*var(--h));
margin-left:auto;
transform: scaleX(-1);
animation-direction: alternate-reverse;
}
.box > div:before {
content: "";
position: absolute;
width: var(--b);
height: 50%;
background: var(--c);
bottom: -25%;
animation: loop 3s infinite linear alternate;
transform-origin: 50% -50%;
}
.box > div:last-child:before {
animation-direction: alternate-reverse;
}
@keyframes loop {
15% {
transform: translateX(calc(var(--w)/2)) rotate(0deg);
}
40% {
transform: translateX(calc(var(--w)/2)) rotate(-180deg);
}
50%,100% {
transform: translateX(calc(var(--w)/2 - var(--b)/2)) rotate(-180deg);
}
}
@keyframes hide {
50% {
visibility: visible;
}
50.1%,100% {
visibility: hidden;
}
}
body {
background:linear-gradient(to right,yellow,gray);
}
<div class="box">
<div></div><div></div>
</div>
<div class="box" style="--w:500px;--h:80px;--b:50px;--c:red;--t:5px">
<div></div><div></div>
</div>
<div class="box" style="--w:90vw;--h:200px;--b:100px;--c:purple;--t:20px">
<div></div><div></div>
</div>
Aby zrozumieć sztuczkę, usuńmy maskę i zastąp ją prostym gradientem i usuń animację ukrywania:
.box {
--w:400px; /* Total width of the coaster */
--h:180px; /* Height of the coaster */
--b:90px; /* width of the small bar */
--t:15px; /* height of the small bar */
--c:blue; /* Color of the small bar */
width:var(--w);
height:var(--h);
}
.box > div {
height: 100%;
position:relative;
width: calc(50% + var(--h)/2 + var(--b)/2);
border-radius: 0 1000px 1000px 0;
/*animation: hide 3s infinite linear alternate;*/
background:
linear-gradient(red,red) top left /calc(100% - var(--h)/2) var(--t),
linear-gradient(green,green) bottom left/calc(100% - var(--h)/2) var(--t),
radial-gradient(farthest-side at left,transparent calc(100% - var(--t)),black 0) right/calc(var(--h)/2) 100%;
background-repeat:no-repeat;
}
.box > div:last-child {
margin-top:calc(-1*var(--h));
margin-left:auto;
transform: scaleX(-1);
animation-direction: alternate-reverse;
}
.box > div:before {
content: "";
position: absolute;
width: var(--b);
height: 50%;
background: var(--c);
bottom: -25%;
animation: loop 3s infinite linear alternate;
transform-origin: 50% -50%;
}
.box > div:last-child:before {
animation-direction: alternate-reverse;
background:purple;
}
@keyframes loop {
15% {
transform: translateX(calc(var(--w)/2)) rotate(0deg);
}
40% {
transform: translateX(calc(var(--w)/2)) rotate(-180deg);
}
50%,100% {
transform: translateX(calc(var(--w)/2 - var(--b)/2)) rotate(-180deg);
}
}
@keyframes hide {
0%,50% {
visibility: visible;
}
50.2%,100% {
visibility: hidden;
}
}
body {
background:linear-gradient(to right,yellow,gray);
}
<div class="box">
<div></div><div></div>
</div>
Ścieżka utworzona przez gradient jest naszą maską i zobaczymy tylko tę część. Następnie tworzymy nasz prostokąt, aby podążał ścieżką, a sztuczką jest posiadanie dwóch symetrycznych elementów, aby stworzyć efekt pętli. ukryj animacja pozwoli nam zobaczyć tylko jeden z nich i idealne nakładanie tworzy ciągłą animację.
Oto wersja na wypadek, gdybyś chciał mieć koło dla kolejki
.box {
--w:400px; /* Total width of the coaster */
--h:180px; /* Height of the coaster */
--b:90px; /* width of the small bar */
--t:15px; /* height of the small bar */
--c:blue; /* Color of the small bar */
width:var(--w);
height:var(--h);
}
.box > div {
height: 100%;
position:relative;
width: calc(50% + var(--h)/2);
border-radius: 0 1000px 1000px 0;
animation: hide 3s infinite linear alternate;
-webkit-mask:
radial-gradient(farthest-side at bottom right,transparent calc(100% - var(--t)),#fff 0 100%,transparent 100%) top 0 right calc(var(--h)/2)/calc(var(--h)/2) 50%,
linear-gradient(#fff,#fff) bottom left/calc(100% - var(--h)/2) var(--t),
radial-gradient(farthest-side at left,transparent calc(100% - var(--t)),#fff 0) right/calc(var(--h)/2) 100%;
-webkit-mask-repeat:no-repeat;
mask:
radial-gradient(farthest-side at bottom right,transparent calc(100% - var(--t)),#fff 0 100%,transparent 100%) top 0 right calc(var(--h)/2)/calc(var(--h)/2) 50%,
linear-gradient(#fff,#fff) bottom left/calc(100% - var(--h)/2) var(--t),
radial-gradient(farthest-side at left,transparent calc(100% - var(--t)),#fff 0) right/calc(var(--h)/2) 100%;
mask-repeat:no-repeat;
}
.box > div:last-child {
margin-top:calc(-1*var(--h));
margin-left:auto;
transform: scaleX(-1);
animation-direction: alternate-reverse;
}
.box > div:before {
content: "";
position: absolute;
width: var(--b);
height: 50%;
background: var(--c);
bottom: -25%;
animation: loop 3s infinite linear alternate;
transform-origin: 50% -50%;
}
.box > div:last-child:before {
animation-direction: alternate-reverse;
}
@keyframes loop {
15% {
transform: translateX(calc(var(--w)/2 - var(--b)/2)) rotate(0deg);
}
50%,100% {
transform: translateX(calc(var(--w)/2 - var(--b)/2)) rotate(-180deg);
}
}
@keyframes hide {
50% {
visibility: visible;
}
50.1%,100% {
visibility: hidden;
}
}
body {
background:linear-gradient(to right,yellow,gray);
}
<div class="box">
<div></div><div></div>
</div>
<div class="box" style="--w:500px;--h:80px;--b:50px;--c:red;--t:5px">
<div></div><div></div>
</div>
<div class="box" style="--w:90vw;--h:200px;--b:100px;--c:purple;--t:20px">
<div></div><div></div>
</div>