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对于我的项目，我们应该为移动矩形分配一个介于 1 和 3 之间的随机值。每次单击后，它应该减少冻结所需的单击次数。当计数达到 0 时，它会冻结。如果冻结的矩形被另一个触摸，它应该再次开始移动，并使用一个新的随机数来表示它需要冻结的点击量。我被困在如何让它通过多次点击冻结。

import java.util.Random;
public class Main {

public static void main(String[] args) {

    MovingRectangle[] rectangles = new MovingRectangle[5];


    Random rng = new Random();
    for (int i = 0; i < rectangles.length; i++) {
        rectangles[i] = new MovingRectangle(
                rng.nextDouble(), // x in [0, 1)
                rng.nextDouble(), // y in [0, 1)
                rng.nextDouble() * 0.02 - 0.01, // vx in [-0.01, 0.01)
                rng.nextDouble() * 0.02 - 0.01, // vy in [-0.01, 0.01)
                rng.nextDouble() * 0.2 + 0.1, // width in [0.1, 0.3)
                rng.nextDouble() * 0.2 + 0.1 // height in [0.1, 0.3)
                );
    }

    while (true) {
        StdDraw.clear(StdDraw.GRAY);

        boolean clickCount = false;
        int clickStatus = rng.nextInt(3);
        int frozenCount = 0;
        for (int i = 0; i < rectangles.length; i++) {


                if (StdDraw.mousePressed()) {
                    ++clickStatus;
                    if (clickStatus > 3) {
                        clickStatus = 3;
                    }
                } else {
                    clickStatus = 0;
                }
                if(clickStatus == 3) {
                clickCount = true;
                }   


            if (StdDraw.mousePressed() 
                    && rectangles[i].containsPoint(StdDraw.mouseX(), StdDraw.mouseY()) && (clickCount = true)) {
                rectangles[i].freeze();
            }

            rectangles[i].draw();
            rectangles[i].update();

            if (rectangles[i].isFrozen()) {
                frozenCount++;
            }
            for (int j = i+1; j < rectangles.length; j++) {

                  if (rectangles[i].collidesWith(rectangles[j])) {

                    rectangles[i].unfreeze();
                    rectangles[j].unfreeze();
                  }
                }
        }
        StdDraw.setPenColor(StdDraw.WHITE);
        StdDraw.filledRectangle(0.2, 0.03, 0.2, 0.03);
        StdDraw.setPenColor(StdDraw.BLACK);
        StdDraw.textLeft(0.0, 0.03, "Rectangles remaining: " +
                (rectangles.length - frozenCount));


        if (frozenCount == rectangles.length) {
            StdDraw.setPenColor(StdDraw.WHITE);
            StdDraw.filledRectangle(0.5, 0.5, 0.1, 0.05);
            StdDraw.setPenColor(StdDraw.BLACK);
            StdDraw.text(0.5, 0.5, "You Win!");
        }
        StdDraw.show(25);
    }
}

}

import java.util.Random;

public class MovingRectangle {

private double x;
private double y;


private double vx;
private double vy;
private boolean isFrozen;
private boolean frozen;

private int red;
private int green;
private int blue;


private double halfWidth;
private double halfHeight;


Random rng;

public MovingRectangle(double x, double y, double vx,
        double vy, double width, double height) {

    this.x = x;
    this.y = y;
    this.vx = vx;
    this.vy = vy;
    this.isFrozen = false;
    this.halfWidth = width / 2;
    this.halfHeight = height / 2;


    rng = new Random();


    randomColor();
}

public void randomColor() {

    red = rng.nextInt(256);
    green = rng.nextInt(256);
    blue = rng.nextInt(256);
}

public void draw() {
    int a = rng.nextInt(4);

    if (isFrozen) {
        StdDraw.setPenColor(StdDraw.RED);
    } else {
        StdDraw.setPenColor(red, green, blue);
    }
    StdDraw.filledRectangle(x, y, halfWidth, halfHeight);
    StdDraw.setPenColor(StdDraw.BLACK);
    //StdDraw.text(x, y, "" + a);


    StdDraw.setPenRadius(0.01);
    StdDraw.setPenColor(StdDraw.BLACK);
    StdDraw.rectangle(x, y, halfWidth, halfHeight);
}

public void update() {
    if (isFrozen) {
        return;
    }


    x += vx;
    y += vy;


    if (x - halfWidth < 0) {
        vx *= -1;
        x = 0 + halfWidth;
        randomColor();
    }


    if (x + halfWidth > 1) {
        vx *= -1;
        x = 1 - halfWidth;
        randomColor();
    }


    if (y - halfHeight < 0) {
        vy *= -1;
        y = 0 + halfHeight;
        randomColor();
    }


    if (y + halfHeight > 1) {
        vy *= -1;
        y = 1 - halfHeight;
        randomColor();
    }
}

public void freeze() {

    isFrozen = true;
}

public void unfreeze() {
    if (!isFrozen) {
    return;
    }
    isFrozen = false;
}

public boolean isFrozen() {
    // returns true if the rectangle is frozen
    return isFrozen;
}

public boolean containsPoint(double a, double b) {
    // Returns true if and only if the point (a, b)
    // is contained inside the rectangle
    return a > x - halfWidth // left edge
             && a < x + halfWidth // right edge
             && b > y - halfHeight // bottom edge
             && b < y + halfHeight; // top edge
}
public int getX() {
    return (int) x;
}public int getY() {
    return (int) y;
}

public boolean collidesWith(MovingRectangle other)   {
    return x < other.x + other.halfWidth && x + halfWidth > other.x && y < other.y + 
            other.halfHeight && y + halfHeight > other.y;
} 
public boolean atSameLocation(MovingRectangle other) {
    return this.x == other.getX() && this.y == other.getY();
}
}
4

2 回答 2

0

我部分找到了解决方案。它没有正确存储冻结所需的点击量，也没有正确计算一次点击，但除此之外，它大部分都有效。

import java.util.Random;
public class Main {

public static void main(String[] args) {

    MovingRectangle[] rectangles = new MovingRectangle[5];


    Random rng = new Random();
    for (int i = 0; i < rectangles.length; i++) {
        rectangles[i] = new MovingRectangle(
                rng.nextDouble(), // x in [0, 1)
                rng.nextDouble(), // y in [0, 1)
                rng.nextDouble() * 0.02 - 0.01, // vx in [-0.01, 0.01)
                rng.nextDouble() * 0.02 - 0.01, // vy in [-0.01, 0.01)
                rng.nextDouble() * 0.2 + 0.1, // width in [0.1, 0.3)
                rng.nextDouble() * 0.2 + 0.1, // height in [0.1, 0.3)
                rng.nextInt(3) + 1
                );
    }

    while (true) {
        StdDraw.clear(StdDraw.GRAY);
         if (StdDraw.mousePressed()) {

    }
        // where check click status 

        int clickCount = 0;
        int clickStatus = 0;
        int frozenCount = 0;
        for (int i = 0; i < rectangles.length; i++) {
                if (StdDraw.mousePressed()) {
                    ++clickStatus;
                    if (clickStatus > 2) {
                        clickStatus = 2;
                    }
                } else {
                    clickStatus = 0;
                }
                if(clickStatus == 1) {
                clickCount++;
                clickCount = 3;
                }   


            if (StdDraw.mousePressed() 
                    && rectangles[i].containsPoint(StdDraw.mouseX(), StdDraw.mouseY())) {
                rectangles[i].setclicksRemaining();
                rectangles[i].freeze();
            }

            rectangles[i].draw();
            rectangles[i].update();

            if (rectangles[i].isFrozen()) {
                frozenCount++;
            }
            for (int j = i+1; j < rectangles.length; j++) {

                  if (rectangles[i].collidesWith(rectangles[j])) {

                    rectangles[i].unfreeze();
                    rectangles[j].unfreeze();
                    rectangles[i].draw();
                    rectangles[j].draw();
                  }
                }
        }
        StdDraw.setPenColor(StdDraw.WHITE);
        StdDraw.filledRectangle(0.2, 0.03, 0.2, 0.03);
        StdDraw.setPenColor(StdDraw.BLACK);
        StdDraw.textLeft(0.0, 0.03, "Rectangles remaining: " +
                (rectangles.length - frozenCount));


        if (frozenCount == rectangles.length) {
            StdDraw.setPenColor(StdDraw.WHITE);
            StdDraw.filledRectangle(0.5, 0.5, 0.1, 0.05);
            StdDraw.setPenColor(StdDraw.BLACK);
            StdDraw.text(0.5, 0.5, "You Win!");
        }
        StdDraw.show(25);
    }
}

}

import java.util.Random;

public class MovingRectangle {
Random rng;
private double x;
private double y;


private double vx;
private double vy;
private boolean isFrozen;
private boolean frozen;

private int red;
private int green;
private int blue;

private int clicksRemaining;

private double halfWidth;
private double halfHeight;




// Your constructor for the MovingRectangle should 
//initialize the number of clicks needed to freeze it to a value between 1 and 3.
public void clicksRemaining() {

    clicksRemaining = rng.nextInt(3) + 1;
}
public void setclicksRemaining() {
    if (clicksRemaining < 1) {
        clicksRemaining = 1;
    }
    --clicksRemaining;
}
public int getclicksRemaining() {
    return clicksRemaining;
}


public MovingRectangle(double x, double y, double vx,
        double vy, double width, double height, int clicksRemaining) {

    this.x = x;
    this.y = y;
    this.vx = vx;
    this.vy = vy;
    this.isFrozen = false;
    this.halfWidth = width / 2;
    this.halfHeight = height / 2;
    this.clicksRemaining = clicksRemaining;


    rng = new Random();


    randomColor();
}


public void randomColor() {

    red = rng.nextInt(256);
    green = rng.nextInt(256);
    blue = rng.nextInt(256);
}

public void draw() {

    if (isFrozen) {
        StdDraw.setPenColor(StdDraw.RED);
    } else {
        StdDraw.setPenColor(red, green, blue);
    }
    StdDraw.filledRectangle(x, y, halfWidth, halfHeight);
    StdDraw.setPenColor(StdDraw.BLACK);
    StdDraw.text(x, y, "" + clicksRemaining);


    StdDraw.setPenRadius(0.01);
    StdDraw.setPenColor(StdDraw.BLACK);
    StdDraw.rectangle(x, y, halfWidth, halfHeight);
}

public void update() {
    if (isFrozen) {
        return;
    }


    x += vx;
    y += vy;


    if (x - halfWidth < 0) {
        vx *= -1;
        x = 0 + halfWidth;
        randomColor();
    }


    if (x + halfWidth > 1) {
        vx *= -1;
        x = 1 - halfWidth;
        randomColor();
    }


    if (y - halfHeight < 0) {
        vy *= -1;
        y = 0 + halfHeight;
        randomColor();
    }


    if (y + halfHeight > 1) {
        vy *= -1;
        y = 1 - halfHeight;
        randomColor();
    }
}

public void freeze() {

    isFrozen = true;
}

public void unfreeze() {
    if (!isFrozen) {
    return;
    }
    clicksRemaining = rng.nextInt(3) + 1;
    isFrozen = false;
}

public boolean isFrozen() {
    return isFrozen;
}

public boolean containsPoint(double a, double b) {
    return a > x - halfWidth // left edge
             && a < x + halfWidth // right edge
             && b > y - halfHeight // bottom edge
             && b < y + halfHeight; // top edge
}
public int getX() {
    return (int) x;
}public int getY() {
    return (int) y;
}public int gethalfWidth() {
    return (int) halfWidth;
}public int gethalfHeight() {
    return (int) halfHeight;
}

public boolean collidesWith(MovingRectangle other)   {

    return x - halfWidth < other.x + other.halfWidth && x + halfWidth > other.x - other.halfWidth && y - halfHeight < other.y + 
            other.halfHeight && y + halfHeight > other.y - halfHeight;
}

}

于 2017-03-11T04:59:02.073 回答
0

跟踪在 MovingRectangle 对象类中单击矩形的次数。您将需要引用该对象数据以确定是否应调用 freeze 方法。

MovingRectangle 的构造函数应将冻结它所需的单击次数初始化为 1 到 3 之间的值。

为此，您将需要 MovingRectangle 类中的“getters”和“setters”，用于跟踪在冻结之前需要单击 MovingRectangle 多少次的计数器。

当在 MovingRectangle 上调用“解冻”方法时，将计数器重新初始化为 1 到 3 之间的随机数。

于 2017-03-09T21:48:15.133 回答