86 lines
1.9 KiB
Java
86 lines
1.9 KiB
Java
import greenfoot.*;
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public class Player extends Actor
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{
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private int speed = 6;
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private int jumpStrength = 20;
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private int gravity = 1;
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private int verticalSpeed = 0;
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private boolean onGround = false;
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public void act()
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{
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moveLeftAndRight();
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jump();
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fall();
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}
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// Bewegung nach links und rechts
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private void moveLeftAndRight()
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{
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if (Greenfoot.isKeyDown("a"))
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{
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setLocation(getX() - speed, getY());
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}
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if (Greenfoot.isKeyDown("d"))
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{
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setLocation(getX() + speed, getY());
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}
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}
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// Springen
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private void jump()
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{
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if (Greenfoot.isKeyDown("space") && onGround)
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{
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verticalSpeed = -jumpStrength;
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onGround = false;
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}
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}
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// Schwerkraft
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private void fall()
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{
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int oldY = getY();
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verticalSpeed += gravity;
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int newY = getY() + verticalSpeed;
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setLocation(getX(), newY);
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Actor ground = getOneIntersectingObject(Ground.class);
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if (ground != null && verticalSpeed >= 0)
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{
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int groundTop = ground.getY()
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- ground.getImage().getHeight() / 2;
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int characterBottom = getY()
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+ getImage().getHeight() / 2;
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// Nur landen, wenn der Spieler vorher über dem Boden war
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int oldCharacterBottom = oldY
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+ getImage().getHeight() / 2;
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if (oldCharacterBottom <= groundTop &&
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characterBottom >= groundTop)
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{
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setLocation(
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getX(),
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groundTop - getImage().getHeight() / 2
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);
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verticalSpeed = 0;
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onGround = true;
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}
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}
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else
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{
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onGround = false;
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}
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}
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}
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