Refactored the ray class to have its interesections work more consistently.

tests/LineTest.java

@@ -3,6 +3,7 @@ import processing.core.PApplet;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Random;
 
 import static java.lang.Math.abs;
 import static org.junit.jupiter.api.Assertions.*;
@@ -31,6 +32,34 @@ class LineTest{
         // make sure the line is starting in the correct place
         assertFloatEquals(v1.x, line.getPosition().x);
         assertFloatEquals(v1.y, line.getPosition().y);
+
+        // make sure the line ends in the correct place
+        assertFloatEquals(v2.x, line.endPoint().x);
+        assertFloatEquals(v2.y, line.endPoint().y);
+        
+        Random rand = new Random();
+        // repeat this test with 100 random lines
+        for(int i = 0; i < 100; i++){
+            v1 = new Vector(rand.nextInt(1001), rand.nextInt(1001));
+            v2 = new Vector(rand.nextInt(1001), rand.nextInt(1001));
+            line = new Line(v1, v2);
+
+            // make sure the line is pointing in the right direction
+            lineDirection = v2.sub(v1);
+            float angleDiff = lineDirection.angleDiff(line.getDirection());
+            assertFloatEquals(0, angleDiff, 0.001f);
+
+            // make sure the line is the correct length
+            assertFloatEquals(lineDirection.mag(), line.getLength());
+
+            // make sure the line is starting in the correct place
+            assertFloatEquals(v1.x, line.getPosition().x);
+            assertFloatEquals(v1.y, line.getPosition().y);
+
+            // make sure the line ends in the correct place
+            assertFloatEquals(v2.x, line.endPoint().x);
+            assertFloatEquals(v2.y, line.endPoint().y);
+        }
     }
 
     @Test
@@ -54,4 +83,20 @@ class LineTest{
         assertFloatEquals(v1.y, line.getPosition().y);
     }
 
+    @Test
+    public void testAngle(){
+        Line ray = new Line(new Vector(680, 560), new Vector(680+116, 560+1));
+        Line wall = new Line(new Vector(675, 587), new Vector(675-114, 587-29));
+
+
+        float angle1 = wall.position.sub(ray.position).angle();
+        float angle2 = wall.endPoint().sub(ray.position).angle();
+        float rayAngle = ray.direction.angle();
+
+        System.out.println("Angle 1: " + String.valueOf(angle1) + ", Angle 2: " + String.valueOf(angle2) + ", Ray Angle: " + String.valueOf(rayAngle));
+        assertFloatEquals(1.753907144057f, angle1, 0.001f);
+        assertFloatEquals(3.1583977941048f, angle2, 0.001f);
+        assertFloatEquals(0.0086204761121f, rayAngle, 0.001f);
+    }
+
 }