CollisionPolygons

core/src/com/trs/game/StaticMath.java

@@ -61,4 +61,46 @@ public class StaticMath {
         return new Polygon(points);
     }
 
+    public static Polygon[] createCollisionPolygons(Polygon wall){
+        Polygon[] collisionPolygons = new Polygon[4];
+
+        // first line of polygon
+        float[] newVertices = wall.getVertices();
+
+        // last four coordinates are all incremented by one, so the polygon is 1 width polygon
+        for(int i = 4; i < 8; i++){
+            newVertices[i] = newVertices[i-4] + 1;
+        }
+        collisionPolygons[0] = new Polygon(newVertices);
+
+        // third line of polygon
+        newVertices = wall.getVertices();
+
+        // last four coordinates are all decremented by one, so the polygon is 1 width polygon
+        for(int i = 4; i < 8; i++){
+            newVertices[i-4] = newVertices[i] - 1;
+        }
+        collisionPolygons[2] = new Polygon(newVertices);
+
+        // second line of polygon
+        newVertices = wall.getVertices();
+
+        newVertices[0] = newVertices[2];
+        newVertices[1] = newVertices[3] + 1;
+        newVertices[6] = newVertices[4];
+        newVertices[7] = newVertices[5] + 1;
+        collisionPolygons[1] = new Polygon(newVertices);
+
+        // fourth line of polygon
+        newVertices = wall.getVertices();
+
+        newVertices[2] = newVertices[0];
+        newVertices[3] = newVertices[1] - 1;
+        newVertices[4] = newVertices[6];
+        newVertices[5] = newVertices[7] - 1;
+        collisionPolygons[3] = new Polygon(newVertices);
+
+        return collisionPolygons;
+    }
+
 }

core/src/com/trs/game/model/Model.java

@@ -15,7 +15,7 @@ public class Model {
         walls.add(new PermWall(60, StaticMath.createPolygon(250,250, 60,25, 100)));
 
         projectiles = new ArrayList<>();
-        projectiles.add(new Projectile(315, 500, 315, 0));
+        projectiles.add(new Projectile(270, 500, 270, 0));
     }
 
     public void timerStep(){

core/src/com/trs/game/model/PermWall.java

@@ -1,6 +1,7 @@
 package com.trs.game.model;
 
 import com.badlogic.gdx.math.Polygon;
+import com.trs.game.StaticMath;
 
 public class PermWall implements Wall {
 
@@ -18,7 +19,9 @@ public class PermWall implements Wall {
     }
 
     public double getRotation() {
-        return rotation;
+        float[] vertices = polygon.getVertices();
+
+        return Math.toDegrees(StaticMath.calculateAngle((int) vertices[0], (int) vertices[1], (int) vertices[6], (int) vertices[7]));
     }
 
     public void setRotation(double rotation) {

core/src/com/trs/game/model/Projectile.java

@@ -48,10 +48,6 @@ public class Projectile {
     private void checkCollision(ArrayList<Wall> walls){
         for(Wall wall : walls){
             if(Intersector.overlapConvexPolygons(polygon, wall.getPolygon())){
-
-                setxPos((int) (getxPos() - this.movementX));
-                setyPos((int) (getyPos() - this.movementY));
-
                 collision(wall);
                 break;
             }
@@ -61,8 +57,22 @@ public class Projectile {
     private void collision(Wall wall){
         System.out.println("Collision");
 
+        Polygon[] collisionPolygons = StaticMath.createCollisionPolygons(wall.getPolygon());
+
+        double collisionAngle = 0;
+        for(Polygon collision : collisionPolygons){
+            if(Intersector.overlapConvexPolygons(polygon, collision)){
+                float[] vertices = collision.getVertices();
+                collisionAngle = StaticMath.calculateAngle((int) vertices[0], (int) vertices[1], (int) vertices[6], (int) vertices[7]);
+                break;
+            }
+        }
+
+        setxPos((int) (getxPos() - this.movementX));
+        setyPos((int) (getyPos() - this.movementY));
+
         double alpha = Math.atan(movementY/movementX);
-        double delta = (Math.PI / 2) - Math.toRadians(wall.getRotation());
+        double delta = (Math.PI / 2) - collisionAngle;
         double beta = +((Math.PI / 2) - alpha - delta);
         double phi = beta + Math.toRadians(wall.getRotation());
 

core/src/com/trs/game/model/TempWall.java

@@ -2,6 +2,7 @@ package com.trs.game.model;
 
 
 import com.badlogic.gdx.math.Polygon;
+import com.trs.game.StaticMath;
 
 public class TempWall implements Wall {
 
@@ -21,7 +22,9 @@ public class TempWall implements Wall {
     }
 
     public double getRotation() {
-        return rotation;
+        float[] vertices = polygon.getVertices();
+
+        return Math.toDegrees(StaticMath.calculateAngle((int) vertices[0], (int) vertices[1], (int) vertices[6], (int) vertices[7]));
     }
 
     public void setRotation(double rotation) {