Fix typos

DotNet/Unity/Raycasting.md

@@ -1,6 +1,6 @@
 # Raycasting Notes
 
-A raycast is conceptually like a laser beam that is fired from a point in space along a particular directuin. Any object making contact with the beam can be detected and reported.
+A raycast is conceptually like a laser beam that is fired from a point in space along a particular direction. Any object making contact with the beam can be detected and reported.
 
 ## 3D Raycasting
 
@@ -16,13 +16,13 @@ void Update()
     hitInfo.transform  // transform og the hit object
     hitInfo.collider.gameObject  // reference to the object hit by the ray
     hitInfo.collider.gameObject  // reference to the object hit by the ray
-    hitInfo.normal  // normal bector og the hit surface
+    hitInfo.normal  // normal vector og the hit surface
     hitInfo.point  // actual point of collision
 
-    // static method, object must haave a collider dot the collision to happen, returns a BOOL
+    // static method, object must have a collider dot the collision to happen, returns a BOOL
     Physics.Raycast(ray, out hitInfo);  // update hitInfo based on ray collisions
     Physics.Raycast(ray, out hitInfo, float maxRayDistance);  // limit the ray length
-    Physics.Raycast(ray, out hitInfo, Mask mask);  // specify with which layers the ray can interact, layer must be allpied to object's mask
+    Physics.Raycast(ray, out hitInfo, Mask mask);  // specify with which layers the ray can interact, layer must be applied to object's mask
     Physics.Raycast(ray, out hitInfo, Mask mask, QueryTriggerInteraction.Ignore);  // ignore collision if "is trigger" is enabled on other objects
 
     // detect a collision
@@ -30,12 +30,12 @@ void Update()
     {
         //collision happened
 
-        // draw the ray ingame for debuggng
+        // draw the ray in game for debugging
         Debug.DrawLine(ray.origin, hitInfo.point, Color.red);  // draw red line if collision happens
     }
     else
     {
-        Debug.DrawLine(ray.origin, ray.origin + ray.direction * 100, Color.blue);  // draw blue line if collision happens, arrival point is 100 units from the origin sinche the ray goes to infinity
+        Debug.DrawLine(ray.origin, ray.origin + ray.direction * 100, Color.blue);  // draw blue line if collision happens, arrival point is 100 units from the origin since the ray goes to infinity
     }
 }
 ```
@@ -47,8 +47,8 @@ public Camera gameCamera;
 
 void Update()
 {
-    // ray goint ftom cametra through a screen point
-    Ray ray = gameCamera.ScreenPointToRay(Input.mousePosition);  // Input.mousePosition is the postion of the mouse in pixels (screen points)
+    // ray going from camera through a screen point
+    Ray ray = gameCamera.ScreenPointToRay(Input.mousePosition);  // Input.mousePosition is the position of the mouse in pixels (screen points)
     RaycastHit hitInfo;  // place pointed by the mouse
 
     Physics.Raycast(ray, out hitInfo)  // update pointed position
@@ -61,12 +61,12 @@ void Update()
 
 void Start()
 {
-    Physisc2D.queriesStartColliders = false;  // avoid collision with collider of the ray generator gameObject
+    Physics2D.queriesStartColliders = false;  // avoid collision with collider of the ray generator gameObject
 }
 
 void Update()
 {
-    // returns a RaycastHit2D, needs an origin and direction separatedly
+    // returns a RaycastHit2D, needs an origin and direction separately
     Raycast2D hitInfo = Physics2D.Raycast(Vector2 origin, Vector2 direction);
     Raycast2D hitInfo = Physics2D.Raycast(Vector2 origin, Vector2 direction, float maxRayDistance);
     Raycast2D hitInfo = Physics2D.Raycast(Vector2 origin, Vector2 direction, float maxRayDistance);