基于Processing的人物移动演示：两点间匀速移动

float x1 = 100;

float y1 = 100;

float x2 = 200;

float y2 = 300;

float speed = 1.2;

void setup(){

size(500, 500);

}

void draw(){

go();

}

void go(){

if (x2 == x1 && y2 == y1) return;

float dx = x2 - x1;

float dy = y2 - y1;

float dd = sqrt(dx * dx + dy * dy);

println(dd);

if (dd < speed){

x1 = x2;

y1 = y2;

}else{

x1 += dx * (speed / dd);

y1 += dy * (speed / dd);

}

ellipse(x1,y1,50,50);

ellipse(100,100,10,10);

ellipse(200,300,10,10);

String t = "人物移动演示：两点间匀速移动";

text(t, 160, 60);

}