From d5c8e7fa42efb31f88be014848613bf337e6d5c0 Mon Sep 17 00:00:00 2001
From: Asecave <ttersch@outlook.de>
Date: Tue, 22 Jun 2021 18:12:12 +0200
Subject: [PATCH] collision detection (CLEAN) working

---
 Zoelda/src/main/Entity.java       | 55 ++++++++++++++++++++++++++++++-
 Zoelda/src/main/LivingEntity.java | 14 +-------
 Zoelda/src/main/Player.java       |  4 +++
 3 files changed, 59 insertions(+), 14 deletions(-)

diff --git a/Zoelda/src/main/Entity.java b/Zoelda/src/main/Entity.java
index 42af625..961b17e 100644
--- a/Zoelda/src/main/Entity.java
+++ b/Zoelda/src/main/Entity.java
@@ -8,7 +8,7 @@ public abstract class Entity implements Ticker {
 	protected float velX, velY;
 	protected float accelleration = 0.012f;
 	protected float friction = 0.2f;
-	protected float width, height;
+	protected float width = 1f, height = 1f;
 
 	@Override
 	public void tick() {
@@ -27,4 +27,57 @@ public abstract class Entity implements Ticker {
 
 	protected abstract void update();
 
+	public void checkTileCollisions(Map map) {
+		for (int x = (int) (posX - 2); x < posX + 2; x++) {
+			for (int y = (int) (posY - 2); y < posY + 2; y++) {
+				if (x >= 0 && x < map.getWidth() && y >= 0 && y < map.getHeight()) {
+					if (map.getTile(x, y).isCollidable()) {
+						if (posY + height / 2 > y && posY - height / 2 < y + 1 && posX + width / 2 > x && posX - width / 2 < x + 1) {
+							float distN = Math.abs((y + 1 + height / 2) - posY);
+							float distE = Math.abs((x + 1 + width / 2) - posX);
+							float distS = Math.abs((y - height / 2) - posY);
+							float distW = Math.abs((x - width / 2) - posX);
+							if (distN <= distE && distN < distS && distN < distW) {
+								onBlockCollision(new boolean[] { true, false, false, false }, x, y);
+							} else if (distE <= distS && distE < distN && distE < distW) {
+								onBlockCollision(new boolean[] { false, true, false, false }, x, y);
+							} else if (distS <= distW && distS < distN && distS < distE) {
+								onBlockCollision(new boolean[] { false, false, true, false }, x, y);
+							} else if (distW <= distS && distW < distN && distW < distE) {
+								onBlockCollision(new boolean[] { false, false, false, true }, x, y);
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	public void onBlockCollision(boolean[] sides, int blockX, int blockY) {
+		if (sides[0]) {
+			if (velY < 0) {
+				velY = 0;
+			}
+			posY = blockY + 1 + height / 2;
+		}
+		if (sides[1]) {
+			if (velX < 0) {
+				velX = 0;
+			}
+			posX = blockX + 1 + width / 2;
+		}
+		if (sides[2]) {
+			if (velY > 0) {
+				velY = 0;
+			}
+			posY = blockY - height / 2;
+		}
+		if (sides[3]) {
+			if (velX > 0) {
+				velX = 0;
+			}
+			posX = blockX - width / 2;
+		}
+	}
+
 }
diff --git a/Zoelda/src/main/LivingEntity.java b/Zoelda/src/main/LivingEntity.java
index 9b6a55e..fb5b5ee 100644
--- a/Zoelda/src/main/LivingEntity.java
+++ b/Zoelda/src/main/LivingEntity.java
@@ -1,10 +1,6 @@
 package main;
 
-import java.awt.Color;
-import java.awt.Graphics2D;
-
 import ea.ActionFigur;
-import ea.BoundingRechteck;
 import ea.Figur;
 
 public class LivingEntity extends Entity {
@@ -14,15 +10,7 @@ public class LivingEntity extends Entity {
 	protected float spriteOffsetX, spriteOffsetY;
 
 	public LivingEntity(Figur figur, String name) {
-		actionFigur = new ActionFigur(figur, name) {
-			@Override
-			public void zeichnen(Graphics2D g, BoundingRechteck r) {
-				g.setColor(Color.GREEN);
-				g.drawRect((int) actionFigur.positionX(), (int) actionFigur.positionY(), (int) actionFigur.getBreite(), (int) actionFigur.getHoehe());
-				g.drawRect((int) (posX * Tile.getSize()), (int) (posY * Tile.getSize()), (int) (width * Tile.getSize()), (int) (height * Tile.getSize()));
-				super.zeichnen(g, r);
-			}
-		};
+		actionFigur = new ActionFigur(figur, name);
 	}
 
 	@Override
diff --git a/Zoelda/src/main/Player.java b/Zoelda/src/main/Player.java
index d33c361..febec2f 100644
--- a/Zoelda/src/main/Player.java
+++ b/Zoelda/src/main/Player.java
@@ -14,6 +14,8 @@ public class Player extends LivingEntity {
 		width = 0.7f;
 		height = 0.8f;
 		spriteOffsetY = -0.14f;
+		posX = 4f;
+		posY = 4f;
 
 		loader.getPlayer(0).animationsGeschwindigkeitSetzen(200);
 		loader.getPlayer(1).animationsGeschwindigkeitSetzen(50);
@@ -27,6 +29,7 @@ public class Player extends LivingEntity {
 
 	@Override
 	protected void update() {
+		System.out.println(posX);
 		if (!((actionFigur.aktuellesVerhalten().equals("strike"))
 				&& actionFigur.aktuelleFigur().aktuellesBild() < actionFigur.aktuelleFigur().animation().length - 1)) {
 			if (!((actionFigur.aktuellesVerhalten().equals("swipe"))
@@ -56,6 +59,7 @@ public class Player extends LivingEntity {
 					zustandSetzen("strike");
 				}
 			}
+			checkTileCollisions(main.getWorld().getCurrentMap());
 			super.update();
 		} else {
 			velX = 0;