好的，所以我正在使用 CodePen 中的脚本:
var smokemachine = function(context, color) {
color = color || [245, 46.8, 48.2]
var polyfillAnimFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
var lastframe;
var currentparticles = []
var pendingparticles = []
var buffer = document.createElement('canvas'),
bctx = buffer.getContext('2d')
buffer.width = 20
buffer.height = 20
var opacities = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 5, 5, 7, 4, 4, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 17, 27, 41, 52, 56, 34, 23, 15, 11, 4, 9, 5, 1, 0, 0, 0, 0, 0, 0, 1, 45, 63, 57, 45, 78, 66, 52, 41, 34, 37, 23, 20, 0, 1, 0, 0, 0, 0, 1, 43, 62, 66, 64, 67, 115, 112, 114, 56, 58, 47, 33, 18, 12, 10, 0, 0, 0, 0, 39, 50, 63, 76, 87, 107, 105, 112, 128, 104, 69, 64, 29, 18, 21, 15, 0, 0, 0, 7, 42, 52, 85, 91, 103, 126, 153, 128, 124, 82, 57, 52, 52, 24, 1, 0, 0, 0, 2, 17, 41, 67, 84, 100, 122, 136, 159, 127, 78, 69, 60, 50, 47, 25, 7, 1, 0, 0, 0, 34, 33, 66, 82, 113, 138, 149, 168, 175, 82, 142, 133, 70, 62, 41, 25, 6, 0, 0, 0, 18, 39, 55, 113, 111, 137, 141, 139, 141, 128, 102, 130, 90, 96, 65, 37, 0, 0, 0, 2, 15, 27, 71, 104, 129, 129, 158, 140, 154, 146, 150, 131, 92, 100, 67, 26, 3, 0, 0, 0, 0, 46, 73, 104, 124, 145, 135, 122, 107, 120, 122, 101, 98, 96, 35, 38, 7, 2, 0, 0, 0, 50, 58, 91, 124, 127, 139, 118, 121, 177, 156, 88, 90, 88, 28, 43, 3, 0, 0, 0, 0, 30, 62, 68, 91, 83, 117, 89, 139, 139, 99, 105, 77, 32, 1, 1, 0, 0, 0, 0, 0, 16, 21, 8, 45, 101, 125, 118, 87, 110, 86, 64, 39, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 28, 79, 79, 117, 122, 88, 84, 54, 46, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 6, 55, 61, 68, 71, 30, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, 23, 25, 20, 12, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 12, 9, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0]
var data = bctx.createImageData(20, 20)
var d = data.data
for (var i = 0; i < d.length; i += 4) {
d[i] = color[0]
d[i + 1] = color[1]
d[i + 2] = color[2]
d[i + 3] = opacities[i / 4]
}
bctx.putImageData(data, 0, 0)
var imagewidth = 20 * 5
var imageheight = 20 * 5
function particle(x, y, l) {
this.x = x
this.y = y
this.age = 0
this.vx = (Math.random() * 8 - 4) / 100
this.startvy = -(Math.random() * 30 + 10) / 100
this.vy = this.startvy
this.scale = Math.random() * .5
this.lifetime = Math.random() * l + l / 2
this.finalscale = 5 + this.scale + Math.random()
this.update = function(deltatime) {
this.x += this.vx * deltatime
this.y += this.vy * deltatime
var frac = Math.pow((this.age) / this.lifetime, .5)
this.vy = (1 - frac) * this.startvy
this.age += deltatime
this.scale = frac * this.finalscale
}
this.draw = function() {
context.globalAlpha = (1 - Math.abs(1 - 2 * (this.age) / this.lifetime)) / 8
var off = this.scale * imagewidth / 2
var xmin = this.x - off
var xmax = xmin + this.scale * imageheight
var ymin = this.y - off
var ymax = ymin + this.scale * imageheight
context.drawImage(buffer, xmin, ymin, xmax - xmin, ymax - ymin)
}
}
function addparticles(x, y, n, lifetime) {
lifetime = lifetime || 4000
n = n || 10
if (n < 1) return Math.random() <= n && pendingparticles.push(new particle(x, y, lifetime));
for (var i = 0; i < n; i++) {
pendingparticles.push(new particle(x, y, lifetime))
};
}
function updateanddrawparticles(deltatime) {
context.clearRect(0, 0, canvas.width, canvas.height);
deltatime = deltatime || 16
var newparticles = []
currentparticles = currentparticles.concat(pendingparticles)
pendingparticles = []
currentparticles.forEach(function(p) {
p.update(deltatime)
if (p.age < p.lifetime) {
p.draw()
newparticles.push(p)
}
})
currentparticles = newparticles
}
function frame(time) {
if (running) {
var deltat = time - lastframe
lastframe = time;
updateanddrawparticles(deltat)
polyfillAnimFrame(frame)
}
}
var running = false
function start() {
running = true
polyfillAnimFrame(function(time) {
lastframe = time
polyfillAnimFrame(frame)
})
}
function stop() {
running = false
}
return {
start: start,
stop: stop,
step: updateanddrawparticles,
addsmoke: addparticles
}
}
var canvas = document.getElementById('canvas')
var ctx = canvas.getContext('2d')
canvas.width = innerWidth
canvas.height = innerHeight
var party = smokemachine(ctx, [254, 16.8, 18.2])
party.start() // start animating
onmousemove = function(e) {
var x = e.clientX
var y = e.clientY
var n = .5
var t = Math.floor(Math.random() * 200) + 3800
party.addsmoke(x, y, n, t)
}
setInterval(function() {
party.addsmoke(innerWidth / 2, innerHeight, 1)
}, 100)html,
body {
position: absolute;
margin: 0;
width: 100%;
}
#hi {
position: absolute;
top: 40%;
width: 100%;
text-align: center;
}
#hi a {
color: #fff;
font-size: 80px;
text-decoration: none;
font-family: Lobster;
}<body cz-shortcut-listen="true">
<a href="https://github.com/bijection/smoke.js">
<img style="width: 150px; position: absolute; top: 0; right: 0; border: 0;" src="./github.png" alt="Spoon me on GitHub">
</a>
<canvas id="canvas" width="1777" height="898"></canvas>
<div id="hi">
<a href="https://github.com/bijection/smoke.js">
smoke.js
</a>
</div>
</body>在脚本框中，您可以看到它如何显示颜色的 RGB 值，我认为更改可以做到这一点，但事实并非如此，并且我已经查看了所有可能更改颜色的内容，并且只是可以'好像没找到，谁能帮帮我吗？
我正在尝试使其成为正常的灰色烟雾。
我需要知道如何做的第二件事是将其从中心移开，再次尝试了我能想到的所有方法。我目前有两个 float DIV，每个底 Angular 各一个，我将 Canvas 放在左侧 float div 中，即使在我将 Canvas div 添加到 float div 之前该 div 在 Angular 落工作，它仍然会强制它到中间。
我使用的 float DIV 代码是:
<!-- Smoke Left -->
<div id="floatLogo">
<canvas id="canvas" width="1777" height="898"></canvas>
<div id="hi"></div>
</div>
CSS 为:
#floatLogo {
width:auto;
height:auto;
padding:5px 2px;
text-align:center;
position: fixed;
bottom: 0;
left: 0;
}
在我将 Canvas 添加到其中之前，DIV 完美地 float 到左侧，现在它被迫到中心
最佳答案
这样就可以了，将 MYCOLORCODEHERE 替换为您想要的颜色；
var ctx = canvas.getContext('2d')
var party = smokemachine(ctx,MYCOLORCODEHERE)
party.addsmoke(500,500)
party.start()
来自文档:
smokemachine(context, [r,g,b])
Returns a smoke machine that makes smoke.
context — the context of the canvas we wanna draw smoke on [r,g,b] — (optional) the color we want the smoke to be var party = smokemachine(context, [1,5,253])
关于javascript - 如何更改 Smoke.js 中烟雾的颜色？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53689032/