我想在处理过程中玩个乒乓球游戏。 但是球的动作并不很顺利。 我尝试了改变框架率并降低球速, 但动作速度似乎并不稳定。 这会不会是一个性能问题? 我做错了什么, 或者处理得不对, 即使是简单的游戏? (我的目标是尝试处理.js 并做一个没有插件的游戏) 。 这是我的代码 :
// Colorset
color scrBG;
color bastards;
// Border for the Paddle
int border;
// The Paddle
int padWid;
int padHei;
float padX;
float padY;
// The Ball
float ballX;
float ballY;
int ballRad;
int speed;
float velX;
float velY;
boolean playing = false;
void setup()
{
border = 5;
scrBG = #EEEEEE;
bastards = #FFF0EB;
padWid = 80;
padHei = 10;
ballRad = 15;
speed = 5;
velX = velY = speed;
size(800, 600);
background(scrBG);
noStroke();
noCursor();
//frameRate(100);
smooth();
}
void draw()
{
background(bastards);drawPaddle();
drawBall();
}
void drawBall()
{
if(!playing)
{
ballX = padX+padWid/2;
ballY = height-border-padHei-ballRad/2-2;
}
else
{
if(ballY > height)
{
ballOut();
}
if(ballY > padY && ballX < padX + padWid && ballX > padX)
{
velY = -velY;
ballY = padY-ballRad-1;
}
if(ballX < ballRad)
{
velX = -velX;
ballX = ballRad+1;
}
if(ballX > width-ballRad)
{
velX = -velX;
ballX = width-ballRad-1;
}
if(ballY < ballRad)
{
velY = -velY;
ballY = ballRad+1;
}
ballY += velY;
ballX += velX;
}
fill(0);
ellipse(ballX, ballY, ballRad*2, ballRad*2);
}
void drawPaddle()
{
padX = constrain(mouseX, border, width-padWid-border);
padY = height-padHei-border;
fill(0);
rect(padX, padY, padWid, padHei);
}
void startLevel()
{
playing = true;
}
void resetLevel()
{
playing = false;
}
void ballOut()
{
playing = false;
}
void mouseClicked()
{
if(playing)
{
resetLevel();
}
else
{
startLevel();
}
}