Canvas绘制可爱的鬼魂幽灵动画特效——源码分享
捷达
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·
2021-05-17 14:36
“前沿技术是指高技术领域中具有前瞻性、先导性和探索性的重大技术,是未来高技术更新换代和新兴产业发展的重要基础,是国家高技术创新能力的综合体现。”
01
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效果实现
以视频效果展示(全程静音):
具体指引详见《计算机基础与编程》
02
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今日知识分享
世界知识产权组织2015年11月11日发布《2015年世界知识产权报告:突破式创新与经济增长》,分析了3D打印、纳米技术和机器人工程学等拥有促进未来经济增长潜力的新技术,并指出中国是在这3项最尖端前沿技术创新方面惟一向先进工业化国家靠近的新兴市场国家。(1)GIS与“数字地球”(2)虚拟现实(3)智能化与个性化的WEB信息检索技术(4)智能信息处理技术(5)网格技术与云计算(6)下一代网
……
具体指引详见《https://baike.so.com/doc/443124-469228.html》
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源码分享
Html:
<html>
<head>
<meta charset="utf-8">
<title>Canvas鬼魂</title>
<style>
canvas {
position: fixed;
top: 0;
left: 0;
}
</style>
</head>
<body>
<script type="text/javascript" src='js/p5.min.js'></script>
<div></div>
<script type="text/javascript">
var blobs = [];
function setup() {
var iHeight = window.innerHeight;
if (iHeight < 500) {
iHeight = 500;
}
createCanvas(window.innerWidth, iHeight);
drawingContext.shadowOffsetX = 0;
drawingContext.shadowOffsetY = 0;
drawingContext.shadowBlur = 60;
drawingContext.shadowColor = "rgb(255, 176, 190)";
for (var i = 0; i < 13; i++) {
blobs.push(new Blob(random(width), random(height)));
}
}
function draw() {
background(13, 33);
for (var b = 0; b < blobs.length; b++) {
blobs[b].update();
blobs[b].show();
}
}
function Blob(x, y) {
this.pos = createVector(x, y);
this.vel = p5.Vector.random2D();
this.vel.mult(random(1, 3));
this.r = random(42, 72);
this.yoff = random(1000);
this.update = function() {
this.pos.add(this.vel);
if (this.pos.x > width || this.pos.x < 0) {
this.vel.x *= -1;
}
if (this.pos.y > height || this.pos.y < 0) {
this.vel.y *= -1;
}
}
this.show = function() {
noStroke();
fill(255);
push();
translate(this.pos.x, this.pos.y);
beginShape();
var xoff = 0;
for (var a = 0; a < TWO_PI; a += 0.1) {
var offset;
if (a > PI/6 && a < 5 * PI/6) {
offset = map(noise(xoff, this.yoff), 0, 1, -0.31 * this.r, 0.78 * this.r);
} else {
offset = map(noise(xoff, this.yoff), 0, 1, -0.08 * this.r, 0.08 * this.r);
}
var r = this.r + offset;
var x = r * cos(a);
var y = r * sin(a);
vertex(x, y);
xoff += 0.1;
}
endShape(CLOSE);
this.yoff += 0.08;
pop();
var eyeOffset = 0.23 * this.r;
stroke(54);
fill(54);
ellipse(this.pos.x - eyeOffset, this.pos.y - eyeOffset, 0.16 * this.r, 0.23 * this.r);
ellipse(this.pos.x + eyeOffset, this.pos.y - eyeOffset, 0.16 * this.r, 0.23 * this.r);
strokeWeight(4);
line(this.pos.x - eyeOffset * 2, this.pos.y - eyeOffset * 2, this.pos.x, this.pos.y - eyeOffset);
line(this.pos.x + eyeOffset * 2, this.pos.y - eyeOffset * 2, this.pos.x, this.pos.y - eyeOffset);
fill(255);
noStroke();
ellipse(this.pos.x - eyeOffset, this.pos.y - eyeOffset - 3, 0.08 * this.r, 0.125 * this.r);
ellipse(this.pos.x + eyeOffset, this.pos.y - eyeOffset - 3, 0.08 * this.r, 0.125 * this.r);
fill(54);
arc(this.pos.x, this.pos.y, 0.5 * this.r, 0.5 * this.r, 0, PI);
}
}
</script>
</body>
</html>
JavaScript,比较凌乱,暂不贴出
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