我有一个工作类，我可以使用键盘在屏幕上移动一个圆圈，同时还有其他圆圈以不同的速度在屏幕上移动。
我到达了这一点，我正在尝试弄清楚如何制作它，以便我可以查明我的形状是否接触了另一个形状，但这就是我所坚持的部分，因为我对如何使其发挥作用没有太多想法。我尝试过各种方法，但大多数都不起作用。
public class Test extends Panel implements Runnable, KeyListener, MouseMotionListener {
static final int left = 37;
static final int right = 39;
static final int down = 40;
static final int up = 38;
static boolean leftPress = false;
static boolean rightPress = false;
static boolean upPress = false;
static boolean downPress = false;
/*****/
static int upperLeftX;
static int upperLeftY;
static int lowerLeftX;
static int lowerLeftY;
static int upperRightX;
static int upperRightY;
static int lowerRightX;
static int lowerRightY;
int eUpperLeftX;
int eUpperLeftY;
int eLowerLeftX;
int eLowerLeftY;
int eUpperRightX;
int eUpperRightY;
int eLowerRightX;
int eLowerRightY;
/*****/
static boolean eat = false;
static boolean eaten = false;
static int mouseLocationX;
static int mouseLocationY;
static String mouseLocation = "";
/**/
int x1_;
int y1_;
int eSize;
int eRandSpawn;
int sleep;
Color eColor;
/**/
static int x1 = 250;
static int y1 = 250;
static int size = 30;
static JFrame frame = new JFrame("Fishy");
static Test panel = new Test(500, 500, 9);
// static Test time1 = new Test(1000);
// static Test time2 = new Test(500);
// static Test time3 = new Test(250);
// static Test time4 = new Test(Methods.randNum(6,20),Methods.randNum(0, 450));
// static Test time5 = new Test(Methods.randNum(6,20),Methods.randNum(0, 450));
static Test eFish[] = new Test[20];
/** CONSTRUCTOR **/
public Test() {
sleep = Methods.randNum(6, 50);
y1_ = Methods.randNum(0, 450);
eRandSpawn = Methods.randNum(1, 2);
eColor = Methods.randColor();
eSize = Methods.randNum(5, 120);
if (eRandSpawn == 1) {
x1_ = -100;
} else {
x1_ = 600;
}
eUpperLeftX = x1_;
eUpperLeftY = y1_;
eLowerLeftX = x1_;
eLowerLeftY = y1_ + eSize;
eUpperRightX = x1_ + eSize;
eUpperRightY = y1_;
eLowerRightX = x1_ + eSize;
eLowerRightY = x1_ + eSize;
}
/** CONSTRUCTOR **/
public Test(int width, int length, int minusBy) {
super(width, length, minusBy);
}
/** MAIN **/
public static void main(String args[]) throws InterruptedException {
for (int i = 0; i < 20; i++) {
eFish[i] = new Test();
}
Thread time[] = new Thread[20];
for (int i = 0; i < 20; i++) {
time[i] = new Thread(eFish[i]);
}
// Thread time1_ = new Thread(time1);
// Thread time2_ = new Thread(time2);
// Thread time3_ = new Thread(time3);
// Thread time4_ = new Thread(time4);
// Thread time5_ = new Thread(time5);
frame.add(panel);
frame.addKeyListener(panel);
panel.addMouseMotionListener(panel);
Frame.showFrame(frame);
// time1_.start();
// time2_.start();
// time3_.start();
// time4_.start();
// time5_.start();
for (int i = 0; i < 20; i++) {
time[i].start();
}
while (true) {
if (upPress) {
y1--;
}
if (downPress) {
y1++;
}
if (leftPress) {
x1--;
}
if (rightPress) {
x1++;
}
if (upPress || downPress || leftPress || rightPress) {
upperLeftX = x1;
upperLeftY = y1;
lowerLeftX = x1;
lowerLeftY = y1 + size;
upperRightX = x1 + size;
upperRightY = y1;
lowerRightX = x1 + size;
lowerRightY = x1 + size;
Thread.sleep(6);
frame.repaint();
}
for (int i = 0; i < 20; i++) {
if (eat) {
size++;
eFish[i].eRandSpawn = Methods.randNum(1, 2);
if (eFish[i].eRandSpawn == 1) {
eFish[i].y1_ = Methods.randNum(0, 450);
eFish[i].x1_ = -100;
eFish[i].sleep = Methods.randNum(6, 50);
eFish[i].eSize = Methods.randNum(5, 120);
eFish[i].eColor = Methods.randColor();
} else {
eFish[i].y1_ = Methods.randNum(0, 450);
eFish[i].x1_ = 600;
eFish[i].sleep = Methods.randNum(6, 50);
eFish[i].eSize = Methods.randNum(5, 120);
eFish[i].eColor = Methods.randColor();
}
eFish[i].eUpperLeftX = eFish[i].x1_;
eFish[i].eUpperLeftY = eFish[i].y1_;
eFish[i].eLowerLeftX = eFish[i].x1_;
eFish[i].eLowerLeftY = eFish[i].y1_ + eFish[i].eSize;
eFish[i].eUpperRightX = eFish[i].x1_ + eFish[i].eSize;
eFish[i].eUpperRightY = eFish[i].y1_;
eFish[i].eLowerRightX = eFish[i].x1_ + eFish[i].eSize;
eFish[i].eLowerRightY = eFish[i].x1_ + eFish[i].eSize;
}
eat = false;
}
}
}
/** PAINT **/
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.CYAN);
g.fillRect(0, 0, 501, 501);
g.setColor(Color.BLACK);
mouseLocation = String.format("%s,%s,%s", x1, y1, size);
g.drawString(mouseLocation, 100, 100);
g.setColor(Color.GREEN);
g.fillOval(x1, y1, size, size);
// g.drawOval(time4.x1_,time4.y1_,50,50);
// g.drawOval(time5.x1_,time5.y1_,50,50);
for (int i = 0; i < 20; i++) {
g.setColor(eFish[i].eColor);
g.fillOval(eFish[i].x1_, eFish[i].y1_, eFish[i].eSize, eFish[i].eSize);
}
/*
* for (int i = 0; i < 10; i++) { g.setColor(Methods.randColor()); g.drawRect(x1 + i, y1 + i, width - i * 2, height - i * 2);
*
* }
*/
// g.drawString(time1.time, 20, 50);
// g.drawString(time2.time, 20, 100);
// g.drawString(time3.time, 20, 150);
}
@Override
public void run() {
while (true) {
try {
Thread.sleep(sleep);
eUpperLeftX = x1_;
eUpperLeftY = y1_;
eLowerLeftX = x1_;
eLowerLeftY = y1_ + eSize;
eUpperRightX = x1_ + eSize;
eUpperRightY = y1_;
eLowerRightX = x1_ + eSize;
eLowerRightY = x1_ + eSize;
if (x1_ == -150) {
y1_ = Methods.randNum(0, 450);
x1_ = 600;
sleep = Methods.randNum(6, 50);
eSize = Methods.randNum(5, 120);
eColor = Methods.randColor();
}
if (x1_ == 650) {
y1_ = Methods.randNum(0, 450);
x1_ = -100;
sleep = Methods.randNum(6, 50);
eSize = Methods.randNum(5, 120);
eColor = Methods.randColor();
}
if (eRandSpawn == 1) {
x1_++;
} else {
x1_--;
}
frame.repaint();
} catch (InterruptedException e) {
}
}
}
@Override
public void keyPressed(KeyEvent e) {
if (up == e.getKeyCode()) {
upPress = true;
}
if (down == e.getKeyCode()) {
downPress = true;
}
if (left == e.getKeyCode()) {
leftPress = true;
}
if (right == e.getKeyCode()) {
rightPress = true;
}
}
@Override
public void keyReleased(KeyEvent e) {
if (up == e.getKeyCode()) {
upPress = false;
}
if (down == e.getKeyCode()) {
downPress = false;
}
if (left == e.getKeyCode()) {
leftPress = false;
}
if (right == e.getKeyCode()) {
rightPress = false;
}
}
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseDragged(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseMoved(MouseEvent e) {
mouseLocationX = e.getX();
mouseLocationY = e.getY();
mouseLocation = String.format("%s,%s", mouseLocationX, mouseLocationY);
frame.repaint();
}
}
最佳答案
public boolean madeContact(Ellipse a, Ellipse b) {
//Center of ellipse
int ax = a.getX(), ay = a.getY(), bx = b.getX(), by = b.getY();
//Radii
int arx = a.getRadiusX(), ary = a.getRadiusY();
int brx = b.getRadiusX(), bry = b.getRadiusY();
//Has hit x, y
boolean hitx = Math.abs(ax - bx) < arx+brx;
boolean hity = Math.abs(ay - by) < ary+bry;
return hitx && hity;
}
关于java - 如何判断一个形状是否已经接触到另一个形状？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29783200/