在p5.js中,我正在尝试创建一个动画,当按下鼠标时,线条的底点平滑(每帧5px)移动到画布的左下角。我可以通过lines.align让他们达到他们需要达到的程度,但他们会立即移动到那里而不是动画。
let lines = []
function setup() {
createCanvas(600, 400);
for(let i = 0; i < 150; i++) {
lines[i] = new Line(random(600), 0, random(600), 400, random(149,212), random(89, 146), 1);
}
}
function draw() {
background(32, 44, 57);
for(let i = 0; i < lines.length; i++){
lines[i].show();
}
}
function mousePressed() {
for(let i = 0; i < lines.length; i++){
lines[i].align();
}
}
class Line {
constructor(xStart, yStart, xFinish, yFinish, g, b, w) {
this.xStart = xStart;
this.yStart = yStart;
this.xFinish = xFinish;
this.yFinish = yFinish;
this.g = g;
this.b = b;
this.w = w;
}
show() {
stroke(242, this.g, this.b);
strokeWeight(this.w);
line(this.xStart, this.yStart, this.xFinish, this.yFinish);
}
align() {
while (this.xFinish > 0) {
this.xFinish = this.xFinish - 5;
}
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.1/p5.js"></script>
答案 0 :(得分:2)
您正在使用阻止while
循环,这就是为什么在视觉上您会看到从线条跳转的原因&#39;开始结束职位。
一种选择是使用条件并增加draw()
中的值:
let lines = []
function setup() {
createCanvas(600, 400);
for(let i = 0; i < 150; i++) {
lines[i] = new Line(random(600), 0, random(600), 400, random(149,212), random(89, 146), 1);
}
}
function draw() {
background(32, 44, 57);
for(let i = 0; i < lines.length; i++){
lines[i].align();
lines[i].show();
}
}
class Line {
constructor(xStart, yStart, xFinish, yFinish, g, b, w) {
this.xStart = xStart;
this.yStart = yStart;
this.xFinish = xFinish;
this.yFinish = yFinish;
this.g = g;
this.b = b;
this.w = w;
}
show() {
stroke(242, this.g, this.b);
strokeWeight(this.w);
line(this.xStart, this.yStart, this.xFinish, this.yFinish);
}
align() {
if (this.xFinish > 0) {
this.xFinish = this.xFinish - 5;
}
}
}
&#13;
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.1/p5.min.js"></script>
&#13;
您可能还需要查看lerp()以在开始和结束位置之间进行插值。
此外,如果您需要更多控制时间/缓和/等,您可以使用TweenLite之类的东西为您进行插值。 (虽然首先要手动增加值/插值/补间,这是一个很好的练习)