1
0
Fork 0

Aufgabe 4.3 - hitsStone, reflectOnStone

master
rxbn_ 3 years ago
parent 0fdd579b41
commit 2102f5c27b
  1. 132
      src/break_out/model/Ball.java
  2. 5
      src/break_out/model/Level.java

@ -2,7 +2,8 @@ package break_out.model;
import break_out.Constants;
import java.awt.Color;
import java.awt.*;
import java.util.ArrayList;
import java.util.Random;
/**
@ -32,6 +33,11 @@ public class Ball implements IBall {
*/
private Color color = Constants.COLOR_COMPONENT;
/**
* The stone which has been hit by the ball
*/
private Stone hitStone = null;
/**
* The constructor of a ball
* The balls position and direction are initialized here.
@ -239,4 +245,128 @@ public class Ball implements IBall {
this.direction.setDy(reflectionVector.getDy());
}
/**
* tests whether the ball touches any stone's hit box
* @param stones
* @return true if the ball touches a stone
*/
public boolean hitsStone(ArrayList<Stone> stones) {
// ball as a Rectangle
Rectangle rectBall = new Rectangle((int) getPosition().getX(), (int) getPosition().getY(), Constants.BALL_DIAMETER, Constants.BALL_DIAMETER);
// size of grid blocks
int blockWidth = Constants.SCREEN_WIDTH / Constants.SQUARES_X;
int blockHeight = Constants.SCREEN_HEIGHT / Constants.SQUARES_Y;
// foreach stone in stones
for(Stone stone : stones) {
if(stone != null) {
// stone as a Rectangle based on view.Field
Rectangle rectStone = new Rectangle((int) stone.getPosition().getX()+1, (int) stone.getPosition().getY()+1, blockWidth-1, blockHeight-1);
// if ball intersects with stone which is existent and visible
if(rectBall.intersects(rectStone) && stone.getColor() != null) {
// set stone and return true
hitStone = stone;
// reflect ball
reflectOnStone(hitStone);
return true;
}
}
}
return false;
}
/**
* returns the stone which got hit, can be null
* @return
*/
public Stone getHitStone() {
return hitStone;
}
/**
* Ball got hit by Stone stone
* @param stone hitbox mechanism of stone
*/
public void reflectOnStone(Stone stone) {
// reflection model based on view.Field rendering model
// size of grid blocks
int blockWidth = Constants.SCREEN_WIDTH / Constants.SQUARES_X;
int blockHeight = Constants.SCREEN_HEIGHT / Constants.SQUARES_Y;
// ball as a Rectangle
Rectangle rectBall = new Rectangle((int) getPosition().getX(), (int) getPosition().getY(), Constants.BALL_DIAMETER, Constants.BALL_DIAMETER);
// stone as a Rectangle
Rectangle rectStone = new Rectangle((int) stone.getPosition().getX()+1, (int) stone.getPosition().getY()+1, blockWidth-1, blockHeight-1);
// stones borders as Rectangle's
Rectangle topBorder = new Rectangle((int) stone.getPosition().getX(), (int) stone.getPosition().getY(), blockWidth, 1);
Rectangle bottomBorder = new Rectangle((int) stone.getPosition().getX(), (int) stone.getPosition().getY()+blockHeight, blockWidth, 1);
Rectangle leftBorder = new Rectangle((int) stone.getPosition().getX(), (int) stone.getPosition().getY(), 1, blockHeight);
Rectangle rightBorder = new Rectangle((int) stone.getPosition().getX()+blockWidth, (int) stone.getPosition().getY(), 1, blockHeight);
//System.out.println(String.format("ball (%s, %s) stone (%s, %s)", getPosition().getX(), getPosition().getY(), stone.getPosition().getX(), stone.getPosition().getY()));
// if stone intersects with any bounds
if(rectBall.intersects(rectStone.getBounds())) {
// corner intersections
if((rectBall.intersects(leftBorder) || rectBall.intersects(rightBorder)) && (rectBall.intersects(topBorder) || rectBall.intersects(bottomBorder))) {
// intersections as Rectangle's
Rectangle intersTop = rectBall.intersection(topBorder);
Rectangle intersBottom = rectBall.intersection(bottomBorder);
Rectangle intersLeft = rectBall.intersection(leftBorder);
Rectangle intersRight = rectBall.intersection(rightBorder);
// rectangles as area to determine corner
double areaIntersTop = intersTop.getHeight() * intersTop.getWidth();
double areaIntersBottom = intersBottom.getHeight() * intersBottom.getWidth();
double areaIntersLeft = intersLeft.getHeight() * intersLeft.getWidth();
double areaIntersRight = intersRight.getHeight() * intersRight.getWidth();
//System.out.printf("ut, ub, ul, ur: %s %s %s %s\r\n", areaIntersTop, areaIntersBottom, areaIntersLeft, areaIntersRight);
// top side
if(areaIntersTop > 0) {
// left|right border
if(areaIntersLeft > areaIntersTop || areaIntersRight > areaIntersTop) direction.setDx(-getDirection().getDx());
// top border
else direction.setDy(-getDirection().getDy());
}
// bottom side
if(areaIntersBottom > 0) {
// left|right border
if(areaIntersLeft > areaIntersBottom || areaIntersRight > areaIntersBottom) direction.setDx(-getDirection().getDx());
// bottom border
else direction.setDy(-getDirection().getDy());
}
// return; intersection already handled
return;
}
// vertical bounds
if(rectBall.intersects(leftBorder) || rectBall.intersects(rightBorder)) {
//System.out.println("left|right border");
direction.setDx(-getDirection().getDx());
}
// horizontal bounds
if(rectBall.intersects(topBorder) || rectBall.intersects(bottomBorder)) {
//System.out.println("top|bottom border");
direction.setDy(-getDirection().getDy());
}
}
}
}

@ -152,6 +152,11 @@ public class Level extends Thread implements ILevel {
getBall().newRandomColor();
}
// Call here the balls method for reacting on stones of the playground
if(getBall().hitsStone(getStones())) {
}
// update paddles position
getPaddleTop().updatePosition(getBall());
getPaddleBottom().updatePosition(getBall());

Loading…
Cancel
Save