Added panelSpeed to panelHandler.

Jonathan / BallJumper

Browse code Added panelSpeed to panelHandler. master
1 parent dd8ca75 commit 79e9791a68c2bb176c4d530ce454d9f2a674694f Jonathan Ström authored on 23 Aug 2017

Patch

Showing 2 changed files

Ignore Space Show notes View app/src/main/java/jonathan/balljumper/GameSurfaceView.java
package jonathan.balljumper; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Point; import android.util.Log; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import jonathan.balljumper.classes.Ball; import jonathan.balljumper.classes.HighscoreHandler; import jonathan.balljumper.classes.Panel; import jonathan.balljumper.classes.PanelHandler; /** * Created by Jonathan on 27/07/2017. / public class GameSurfaceView extends SurfaceView implements Runnable { private boolean isRunning = false; private Thread gameThread; private SurfaceHolder holder; private Point screenSize; private Ball ball; private PanelHandler panelHandler; private HighscoreHandler highscoreHandler; private final static int MAX_FPS = 40; private final static int FRAME_PERIOD = 1000 / MAX_FPS; public GameSurfaceView(Context context) { super(context); // Get and set window size. screenSize = new Point(); ((Activity)getContext()).getWindowManager() .getDefaultDisplay() .getSize(screenSize); holder = getHolder(); holder.addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { screenSize.x = width; screenSize.y = height; } @Override public void surfaceDestroyed(SurfaceHolder holder) { } }); // Initialize ball. int ballRadius = 35; ball = new Ball(screenSize.x / 2 - ballRadius, (screenSize.y / 3) 2 - ballRadius, ballRadius, 0.2f, // Velocity 0.5f, // Gravity 17f, // Speed Color.argb(255, 200, 34, 34)); // Initialize panelHandler. panelHandler = new PanelHandler(10, 150, 20, 5f, screenSize); highscoreHandler = new HighscoreHandler(); } /** * Start or resume the game. / public void resume() { isRunning = true; gameThread = new Thread(this); gameThread.start(); } /* * Pause the game loop / public void pause() { isRunning = false; boolean retry = true; while (retry) { try { gameThread.join(); retry = false; } catch (InterruptedException e) { // Try shutting down the thread again. } } } /* * Updates each frame. / protected void update() { // Game mechanics // Delta value. If this is set, then move the screen accordingly. float ballHeightLimit = -1; // If the ball goes below the screen, you lose. if (ball.getBottom() >= screenSize.y) { lose(); } ball.move(); highscoreHandler.addHeight(panelHandler.getPanelSpeed()); // Check if the ball is going too high, if so move the screen with the ball. if (ball.getVelocity() < ball.getSpeed() && ball.getTop() < (screenSize.y / 3) 2) { // Move the ball first to set the new velocity and to get the delta values. // Reset the ball's Y position. ballHeightLimit = (ball.getDeltaY() * (1f / (Math.max((ball.getY() - 150), 100) / 100))); ball.setY(ball.getY() - ballHeightLimit); ball.setDeltaY(ball.getDeltaY() - ballHeightLimit); // Give extra score for speeding up. highscoreHandler.addHeight(-ballHeightLimit); } for (int i = 0; i < panelHandler.getPanelList().length; ++i) { Panel panel = panelHandler.getPanelList()[i]; // Move the panel at normal speed and reset it if it comes below the screen. panelHandler.move(i); // When the ball moves upwards too much, move with the ball. if (ballHeightLimit != -1) { panelHandler.move(i, -ballHeightLimit); } // Bounce if the ball intersects with a panel. if (ball.intersects(panel.getX(), panel.getY(), panel.getWidth(), panel.getHeight())) { // Do not bounce if you're above the screen. if (ball.getBottom() > 0) { ball.bounce(); // If the ball is falling. if (ball.getDeltaY() > 0) { ball.setY(ball.getY() - (ball.getBottom() - panel.getTop())); } } } } } /** * Render everything to the screen. * @param canvas Canvas to be used when rendering. / protected void render(Canvas canvas) { // Reset background canvas.drawColor(Color.GREEN); // Render panels panelHandler.draw(canvas); // Render ball ball.draw(canvas); // Render score and highscore. highscoreHandler.draw(canvas); } @Override public void run() { while(isRunning) { // Make sure the surface is ready if (! holder.getSurface().isValid()) { continue; } long started = System.currentTimeMillis(); // Update objects. update(); // Render objects to screen. Canvas canvas = holder.lockCanvas(); if (canvas != null) { render(canvas); holder.unlockCanvasAndPost(canvas); } // Make sure update, updates accordingly to the FPS. float deltaTime = (System.currentTimeMillis() - started); int sleepTime = (int) ((FRAME_PERIOD - deltaTime) / 2); if (sleepTime > 0) { try { gameThread.sleep(sleepTime); } catch (InterruptedException e) { } } while (sleepTime < 0) { update(); sleepTime += FRAME_PERIOD; } } } @Override public boolean onTouchEvent(MotionEvent event) { super.onTouchEvent(event); float x = event.getX(); float y = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_MOVE: ball.setX(x); break; } return true; } public void lose() { isRunning = false; try { gameThread.sleep(1000); } catch (InterruptedException e) { } highscoreHandler.resetAndSave(); ball.bounce(); ball.setX(screenSize.x / 2 - ball.getWidth() / 2); ball.setY((screenSize.y / 3) 2 - ball.getWidth() / 2); ball.setDeltaX(0); ball.setDeltaY(0); panelHandler.resetAllPanels(); isRunning = true; } } package jonathan.balljumper; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Point; import android.util.Log; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import jonathan.balljumper.classes.Ball; import jonathan.balljumper.classes.HighscoreHandler; import jonathan.balljumper.classes.Panel; import jonathan.balljumper.classes.PanelHandler; /** * Created by Jonathan on 27/07/2017. / public class GameSurfaceView extends SurfaceView implements Runnable { private boolean isRunning = false; private Thread gameThread; private SurfaceHolder holder; private Point screenSize; private Ball ball; private PanelHandler panelHandler; private HighscoreHandler highscoreHandler; private final static int MAX_FPS = 40; private final static int FRAME_PERIOD = 1000 / MAX_FPS; public GameSurfaceView(Context context) { super(context); // Get and set window size. screenSize = new Point(); ((Activity)getContext()).getWindowManager() .getDefaultDisplay() .getSize(screenSize); holder = getHolder(); holder.addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { screenSize.x = width; screenSize.y = height; } @Override public void surfaceDestroyed(SurfaceHolder holder) { } }); // Initialize ball. int ballRadius = 35; ball = new Ball(screenSize.x / 2 - ballRadius, (screenSize.y / 3) 2 - ballRadius, ballRadius, 0.2f, // Velocity 0.5f, // Gravity 17f, // Speed Color.argb(255, 200, 34, 34)); // Initialize panelHandler. panelHandler = new PanelHandler(10, 150, 20, 5f, screenSize); highscoreHandler = new HighscoreHandler(); } /** * Start or resume the game. / public void resume() { isRunning = true; gameThread = new Thread(this); gameThread.start(); } /* * Pause the game loop / public void pause() { isRunning = false; boolean retry = true; while (retry) { try { gameThread.join(); retry = false; } catch (InterruptedException e) { // Try shutting down the thread again. } } } /* * Updates each frame. / protected void update() { // Game mechanics // Delta value. If this is set, then move the screen accordingly. float ballHeightLimit = -1; // If the ball goes below the screen, you lose. if (ball.getBottom() >= screenSize.y) { lose(); } ball.move(); highscoreHandler.addHeight(5f); // Check if the ball is going too high, if so move the screen with the ball. if (ball.getVelocity() < ball.getSpeed() && ball.getTop() < (screenSize.y / 3) 2) { // Move the ball first to set the new velocity and to get the delta values. // Reset the ball's Y position. ballHeightLimit = (ball.getDeltaY() * (1f / (Math.max((ball.getY() - 150), 100) / 100))); ball.setY(ball.getY() - ballHeightLimit); ball.setDeltaY(ball.getDeltaY() - ballHeightLimit); // Give extra score for speeding up. highscoreHandler.addHeight(-ballHeightLimit); } for (int i = 0; i < panelHandler.getPanelList().length; ++i) { Panel panel = panelHandler.getPanelList()[i]; // Move the panel at normal speed and reset it if it comes below the screen. panelHandler.move(i); // When the ball moves upwards too much, move with the ball. if (ballHeightLimit != -1) { panelHandler.move(i, -ballHeightLimit); } // Bounce if the ball intersects with a panel. if (ball.intersects(panel.getX(), panel.getY(), panel.getWidth(), panel.getHeight())) { // Do not bounce if you're above the screen. if (ball.getBottom() > 0) { ball.bounce(); // If the ball is falling. if (ball.getDeltaY() > 0) { ball.setY(ball.getY() - (ball.getBottom() - panel.getTop())); } } } } } /** * Render everything to the screen. * @param canvas Canvas to be used when rendering. / protected void render(Canvas canvas) { // Reset background canvas.drawColor(Color.GREEN); // Render panels panelHandler.draw(canvas); // Render ball ball.draw(canvas); // Render score and highscore. highscoreHandler.draw(canvas); } @Override public void run() { while(isRunning) { // Make sure the surface is ready if (! holder.getSurface().isValid()) { continue; } long started = System.currentTimeMillis(); // Update objects. update(); // Render objects to screen. Canvas canvas = holder.lockCanvas(); if (canvas != null) { render(canvas); holder.unlockCanvasAndPost(canvas); } // Make sure update, updates accordingly to the FPS. float deltaTime = (System.currentTimeMillis() - started); int sleepTime = (int) ((FRAME_PERIOD - deltaTime) / 2); if (sleepTime > 0) { try { gameThread.sleep(sleepTime); } catch (InterruptedException e) { } } while (sleepTime < 0) { update(); sleepTime += FRAME_PERIOD; } } } @Override public boolean onTouchEvent(MotionEvent event) { super.onTouchEvent(event); float x = event.getX(); float y = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_MOVE: ball.setX(x); break; } return true; } public void lose() { isRunning = false; try { gameThread.sleep(1000); } catch (InterruptedException e) { } highscoreHandler.resetAndSave(); ball.bounce(); ball.setX(screenSize.x / 2 - ball.getWidth() / 2); ball.setY((screenSize.y / 3) 2 - ball.getWidth() / 2); ball.setDeltaX(0); ball.setDeltaY(0); panelHandler.resetAllPanels(); isRunning = true; } }

Ignore Space Show notes View

app/src/main/java/jonathan/balljumper/GameSurfaceView.java

package jonathan.balljumper;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Point;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import jonathan.balljumper.classes.Ball;
import jonathan.balljumper.classes.HighscoreHandler;
import jonathan.balljumper.classes.Panel;
import jonathan.balljumper.classes.PanelHandler;

/**
 * Created by Jonathan on 27/07/2017.
 */

public class GameSurfaceView extends SurfaceView implements Runnable {
    private boolean isRunning = false;
    private Thread gameThread;
    private SurfaceHolder holder;

private Point screenSize;

private Ball ball;
    private PanelHandler panelHandler;
    private HighscoreHandler highscoreHandler;

private final static int MAX_FPS = 40;
    private final static int FRAME_PERIOD = 1000 / MAX_FPS;

public GameSurfaceView(Context context) {
        super(context);

// Get and set window size.
        screenSize = new Point();
        ((Activity)getContext()).getWindowManager()
                                .getDefaultDisplay()
                                .getSize(screenSize);

holder = getHolder();
        holder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
            }

@Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
                screenSize.x = width;
                screenSize.y = height;
            }

@Override
            public void surfaceDestroyed(SurfaceHolder holder) {
            }
        });

// Initialize ball.
        int ballRadius = 35;
        ball = new Ball(screenSize.x / 2 - ballRadius,
                       (screenSize.y / 3) * 2 - ballRadius,
                        ballRadius,
                        0.2f, // Velocity
                        0.5f, // Gravity
                        17f, // Speed
                        Color.argb(255, 200, 34, 34));

// Initialize panelHandler.
        panelHandler = new PanelHandler(10, 150, 20, 5f, screenSize);

highscoreHandler = new HighscoreHandler();
    }

/**
     * Start or resume the game.
     */
    public void resume() {
        isRunning = true;
        gameThread = new Thread(this);
        gameThread.start();
    }

/**
     * Pause the game loop
     */
    public void pause() {
        isRunning = false;
        boolean retry = true;
        while (retry) {
            try {
                gameThread.join();
                retry = false;
            } catch (InterruptedException e) {
                // Try shutting down the thread again.
            }
        }
    }

/**
     * Updates each frame.
     */
    protected void update() {
        // Game mechanics

// Delta value. If this is set, then move the screen accordingly.
        float ballHeightLimit = -1;

// If the ball goes below the screen, you lose.
        if (ball.getBottom() >= screenSize.y) {
            lose();
        }

ball.move();
        highscoreHandler.addHeight(panelHandler.getPanelSpeed());

// Check if the ball is going too high, if so move the screen with the ball.
        if (ball.getVelocity() < ball.getSpeed() && ball.getTop() < (screenSize.y / 3) * 2) {
            // Move the ball first to set the new velocity and to get the delta values.
            // Reset the ball's Y position.
            ballHeightLimit = (ball.getDeltaY() * (1f / (Math.max((ball.getY() - 150), 100) / 100)));
            ball.setY(ball.getY() - ballHeightLimit);
            ball.setDeltaY(ball.getDeltaY() - ballHeightLimit);

// Give extra score for speeding up.
            highscoreHandler.addHeight(-ballHeightLimit);
        }

for (int i = 0; i < panelHandler.getPanelList().length; ++i) {
            Panel panel = panelHandler.getPanelList()[i];

// Move the panel at normal speed and reset it if it comes below the screen.
            panelHandler.move(i);

// When the ball moves upwards too much, move with the ball.
            if (ballHeightLimit != -1) {
                panelHandler.move(i, -ballHeightLimit);
            }

// Bounce if the ball intersects with a panel.
            if (ball.intersects(panel.getX(), panel.getY(), panel.getWidth(), panel.getHeight())) {
                // Do not bounce if you're above the screen.
                if (ball.getBottom() > 0) {
                    ball.bounce();
                    // If the ball is falling.
                    if (ball.getDeltaY() > 0) {
                        ball.setY(ball.getY() - (ball.getBottom() - panel.getTop()));
                    }
                }
            }
        }
    }

/**
     * Render everything to the screen.
     * @param canvas Canvas to be used when rendering.
     */
    protected void render(Canvas canvas) {
        // Reset background
        canvas.drawColor(Color.GREEN);

// Render panels
        panelHandler.draw(canvas);

// Render ball
        ball.draw(canvas);

// Render score and highscore.
        highscoreHandler.draw(canvas);
    }

@Override
    public void run() {
        while(isRunning) {
            // Make sure the surface is ready
            if (! holder.getSurface().isValid()) {
                continue;
            }
            long started = System.currentTimeMillis();

// Update objects.
            update();

// Render objects to screen.
            Canvas canvas = holder.lockCanvas();
            if (canvas != null) {
                render(canvas);
                holder.unlockCanvasAndPost(canvas);
            }

// Make sure update, updates accordingly to the FPS.
            float deltaTime = (System.currentTimeMillis() - started);
            int sleepTime = (int) ((FRAME_PERIOD - deltaTime) / 2);
            if (sleepTime > 0) {
                try {
                    gameThread.sleep(sleepTime);
                }
                catch (InterruptedException e) {
                }
            }
            while (sleepTime < 0) {
                update();
                sleepTime += FRAME_PERIOD;
            }
        }
    }

@Override
    public boolean onTouchEvent(MotionEvent event) {
        super.onTouchEvent(event);

float x = event.getX();
        float y = event.getY();

switch (event.getAction()) {
            case MotionEvent.ACTION_MOVE:
                ball.setX(x);
                break;
        }

return true;
    }

public void lose() {
        isRunning = false;

try {
            gameThread.sleep(1000);
        } catch (InterruptedException e) { }

highscoreHandler.resetAndSave();

ball.bounce();
        ball.setX(screenSize.x / 2 - ball.getWidth() / 2);
        ball.setY((screenSize.y / 3) * 2 - ball.getWidth() / 2);
        ball.setDeltaX(0);
        ball.setDeltaY(0);

panelHandler.resetAllPanels();

isRunning = true;
    }
}

package jonathan.balljumper;

import jonathan.balljumper.classes.Ball;
import jonathan.balljumper.classes.HighscoreHandler;
import jonathan.balljumper.classes.Panel;
import jonathan.balljumper.classes.PanelHandler;

/**
 * Created by Jonathan on 27/07/2017.
 */

public class GameSurfaceView extends SurfaceView implements Runnable {
    private boolean isRunning = false;
    private Thread gameThread;
    private SurfaceHolder holder;

private Point screenSize;

private Ball ball;
    private PanelHandler panelHandler;
    private HighscoreHandler highscoreHandler;

private final static int MAX_FPS = 40;
    private final static int FRAME_PERIOD = 1000 / MAX_FPS;

public GameSurfaceView(Context context) {
        super(context);

holder = getHolder();
        holder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
            }

@Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
                screenSize.x = width;
                screenSize.y = height;
            }

@Override
            public void surfaceDestroyed(SurfaceHolder holder) {
            }
        });

// Initialize panelHandler.
        panelHandler = new PanelHandler(10, 150, 20, 5f, screenSize);

highscoreHandler = new HighscoreHandler();
    }

/**
     * Start or resume the game.
     */
    public void resume() {
        isRunning = true;
        gameThread = new Thread(this);
        gameThread.start();
    }

/**
     * Updates each frame.
     */
    protected void update() {
        // Game mechanics

// Delta value. If this is set, then move the screen accordingly.
        float ballHeightLimit = -1;

// If the ball goes below the screen, you lose.
        if (ball.getBottom() >= screenSize.y) {
            lose();
        }

ball.move();
        highscoreHandler.addHeight(5f);

// Give extra score for speeding up.
            highscoreHandler.addHeight(-ballHeightLimit);
        }

for (int i = 0; i < panelHandler.getPanelList().length; ++i) {
            Panel panel = panelHandler.getPanelList()[i];

// Move the panel at normal speed and reset it if it comes below the screen.
            panelHandler.move(i);

// When the ball moves upwards too much, move with the ball.
            if (ballHeightLimit != -1) {
                panelHandler.move(i, -ballHeightLimit);
            }

// Render panels
        panelHandler.draw(canvas);

// Render ball
        ball.draw(canvas);

// Render score and highscore.
        highscoreHandler.draw(canvas);
    }

// Update objects.
            update();

@Override
    public boolean onTouchEvent(MotionEvent event) {
        super.onTouchEvent(event);

float x = event.getX();
        float y = event.getY();

switch (event.getAction()) {
            case MotionEvent.ACTION_MOVE:
                ball.setX(x);
                break;
        }

return true;
    }

public void lose() {
        isRunning = false;

try {
            gameThread.sleep(1000);
        } catch (InterruptedException e) { }

highscoreHandler.resetAndSave();

ball.bounce();
        ball.setX(screenSize.x / 2 - ball.getWidth() / 2);
        ball.setY((screenSize.y / 3) * 2 - ball.getWidth() / 2);
        ball.setDeltaX(0);
        ball.setDeltaY(0);

panelHandler.resetAllPanels();

isRunning = true;
    }
}

Ignore Space Show notes View app/src/main/java/jonathan/balljumper/classes/PanelHandler.java
package jonathan.balljumper.classes; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Point; import java.util.Random; /** * Created by Jonathan on 29/07/2017. / public class PanelHandler { private final int panelFirstPosition = 1500; // Y-position (pixel) of the first panel. private float panelSpeed; // The normal panel speed. private Point screenSize; private Random random; private Panel[] panelList; private int lastPanelIndex = -1; public PanelHandler(int panelCount, int panelWidth, int panelHeight, float panelSpeed, Point screenSize) { this.screenSize = screenSize; this.panelSpeed = panelSpeed; // Initialize all panels. panelList = new Panel[panelCount]; random = new Random(); for (int i = 0; i < panelList.length; ++i) { panelList[i] = new Panel( random.nextInt(screenSize.x - panelWidth), getNewPanelHeight(lastPanelIndex), panelWidth, panelHeight, Color.GRAY, panelSpeed ); lastPanelIndex = i; } } private void resetPanel(int index) { panelList[index].setY(getNewPanelHeight(lastPanelIndex)); lastPanelIndex = index; } private float getNewPanelHeight(int index) { float newPanelHeight; if (index == -1) { newPanelHeight = panelFirstPosition; } else { float diff = (random.nextInt(screenSize.y / 5) + 250); newPanelHeight = panelList[index].getY() - diff; } return newPanelHeight; } public void resetAllPanels() { lastPanelIndex = -1; for (int i = 0; i < panelList.length; ++i) { panelList[i].setX(screenSize.x - panelList[i].getWidth()); panelList[i].setY(getNewPanelHeight(lastPanelIndex)); } } public void draw(Canvas canvas) { for (Panel panel : panelList) { Paint pPanel = new Paint(); pPanel.setColor(panel.getColor()); canvas.drawRect(panel.getX(), panel.getY(), panel.getWidth() + panel.getX(), panel.getHeight() + panel.getY(), pPanel); } } /* * Move the panel. * @param index The panel index to move. / public void move(int index) { move(index, panelList[index].getSpeed()); } /* * * @param index The panel index to move. * @param speed The speed to move the panel. / public void move(int index, float speed) { // If a panel is outside of the screen reset it at the top. if (panelList[index].getY() + speed > screenSize.y) { resetPanel(index); } else { // Move the panel down. panelList[index].setY(panelList[index].getY() + speed); } } public Panel[] getPanelList() { return this.panelList; } public float getPanelSpeed() { return this.panelSpeed; } } package jonathan.balljumper.classes; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Point; import java.util.Random; /* * Created by Jonathan on 29/07/2017. / public class PanelHandler { private final int panelFirstPosition = 1500; // Y-position (pixel) of the first panel. private Point screenSize; private Random random; private Panel[] panelList; private int lastPanelIndex = -1; public PanelHandler(int panelCount, int panelWidth, int panelHeight, float panelSpeed, Point screenSize) { this.screenSize = screenSize; random = new Random(); // Initialize all panels. panelList = new Panel[panelCount]; Random random = new Random(); for (int i = 0; i < panelList.length; ++i) { panelList[i] = new Panel( random.nextInt(screenSize.x - panelWidth), getNewPanelHeight(lastPanelIndex), panelWidth, panelHeight, Color.GRAY, panelSpeed ); lastPanelIndex = i; } } private void resetPanel(int index) { panelList[index].setY(getNewPanelHeight(lastPanelIndex)); lastPanelIndex = index; } private float getNewPanelHeight(int index) { float newPanelHeight; if (index == -1) { newPanelHeight = panelFirstPosition; } else { float diff = (random.nextInt(screenSize.y / 5) + 250); newPanelHeight = panelList[index].getY() - diff; } return newPanelHeight; } public void resetAllPanels() { lastPanelIndex = -1; for (int i = 0; i < panelList.length; ++i) { panelList[i].setX(screenSize.x - panelList[i].getWidth()); panelList[i].setY(getNewPanelHeight(lastPanelIndex)); } } public Panel[] getPanelList() { return panelList; } public void draw(Canvas canvas) { for (Panel panel : panelList) { Paint pPanel = new Paint(); pPanel.setColor(panel.getColor()); canvas.drawRect(panel.getX(), panel.getY(), panel.getWidth() + panel.getX(), panel.getHeight() + panel.getY(), pPanel); } } /* * Move the panel. * @param index The panel index to move. / public void move(int index) { move(index, panelList[index].getSpeed()); } /* * * @param index The panel index to move. * @param speed The speed to move the panel. */ public void move(int index, float speed) { // If a panel is outside of the screen reset it at the top. if (panelList[index].getY() + speed > screenSize.y) { resetPanel(index); } else { // Move the panel down. panelList[index].setY(panelList[index].getY() + speed); } } }

Ignore Space Show notes View

app/src/main/java/jonathan/balljumper/classes/PanelHandler.java

package jonathan.balljumper.classes;

import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;

import java.util.Random;

/**
 * Created by Jonathan on 29/07/2017.
 */

public class PanelHandler {
    private final int panelFirstPosition = 1500; // Y-position (pixel) of the first panel.

private float panelSpeed; // The normal panel speed.
    private Point screenSize;
    private Random random;

private Panel[] panelList;
    private int lastPanelIndex = -1;

public PanelHandler(int panelCount, int panelWidth, int panelHeight, float panelSpeed, Point screenSize) {
        this.screenSize = screenSize;
        this.panelSpeed = panelSpeed;

// Initialize all panels.
        panelList = new Panel[panelCount];

random = new Random();

for (int i = 0; i < panelList.length; ++i) {
            panelList[i] = new Panel(
                    random.nextInt(screenSize.x - panelWidth),
                    getNewPanelHeight(lastPanelIndex),
                    panelWidth,
                    panelHeight,
                    Color.GRAY,
                    panelSpeed
            );
            lastPanelIndex = i;
        }
    }

private void resetPanel(int index) {
        panelList[index].setY(getNewPanelHeight(lastPanelIndex));

lastPanelIndex = index;
    }

private float getNewPanelHeight(int index) {
        float newPanelHeight;
        if (index == -1) {
            newPanelHeight = panelFirstPosition;
        } else {
            float diff = (random.nextInt(screenSize.y / 5) + 250);
            newPanelHeight = panelList[index].getY() - diff;
        }

return newPanelHeight;
    }

public void resetAllPanels() {
        lastPanelIndex = -1;
        for (int i = 0; i < panelList.length; ++i) {
            panelList[i].setX(screenSize.x - panelList[i].getWidth());
            panelList[i].setY(getNewPanelHeight(lastPanelIndex));
        }
    }

public void draw(Canvas canvas) {
        for (Panel panel : panelList) {
            Paint pPanel = new Paint();
            pPanel.setColor(panel.getColor());
            canvas.drawRect(panel.getX(), panel.getY(), panel.getWidth() + panel.getX(), panel.getHeight() + panel.getY(), pPanel);
        }
    }

/**
     * Move the panel.
     * @param index The panel index to move.
     */
    public void move(int index) {
        move(index, panelList[index].getSpeed());
    }

/**
     *
     * @param index The panel index to move.
     * @param speed The speed to move the panel.
     */
    public void move(int index, float speed) {
        // If a panel is outside of the screen reset it at the top.
        if (panelList[index].getY() + speed > screenSize.y) {
            resetPanel(index);
        } else {
            // Move the panel down.
            panelList[index].setY(panelList[index].getY() + speed);
        }
    }

public Panel[] getPanelList() {
        return this.panelList;
    }

public float getPanelSpeed() {
        return this.panelSpeed;
    }
}