//Return all valid collisions between objects in a given list
internal static void CollisionChecks()
{
var collisionList = new List <Collision>(); //Prep a list
for (int i = 0; i < ObjectList.Count; i++) //For each object
{
SceneObject currObj = ObjectList[i];
{
if (currObj.GetType() == typeof(Bullet)) //If it is a bullet
{
if (currObj.GlobalPosition.x < 0 || currObj.GlobalPosition.x > WindowWidth || currObj.GlobalPosition.y < 0 || currObj.GlobalPosition.y > WindowHeight)
{ //If it has left the window boundaries
collisionList.Add(new Collision(currObj)); //Add a null collision to the list
continue; //Continue to next object
}
}
}
for (int j = i + 1; j < ObjectList.Count; j++) //For each object beyond the current
{
SceneObject otherObj = ObjectList[j];
if (currObj.typeIgnore.Contains(otherObj.GetType()) || otherObj.typeIgnore.Contains(currObj.GetType())) //If either object ignores the others' type
{
continue; //Skip
}
if (currObj.specificIgnore.Contains(otherObj) || otherObj.specificIgnore.Contains(currObj)) //If either object ignores the other specifically
{
continue; //Skip
}
if (DistanceBetweenObjs(currObj, otherObj) > currObj.maxBoxDimension + otherObj.maxBoxDimension) //If they are too far apart to actually touch,
{
continue; //Skip
}
if (!Collides(currObj.Box, otherObj.Box)) //If oriented bounding boxes don't collide
{
continue; //Skip
}
collisionList.Add(new Collision(currObj, otherObj)); //Add pair to final list if all checks passed
}
}
Collisions = collisionList; //Update the list of Collisions
}
//Processes the list of collisions
internal static void CollisionProcess()
{
foreach (Collision coll in Collisions)
{
SceneObject a = coll.a;
SceneObject b = coll.b;
string container; //Contains info on what types are colliding
if (b == null) //If it is a null collision
{
container = a.GetType().Name + ",NULL"; //Note as such
}
else //Otherwise
{
container = a.GetType().Name + "," + b.GetType().Name; //Note both types
}
switch (container) //Look at the info
{
case "Bullet,NULL": //case "x,y": Read these cases as "I am an x colliding with a y"
{
a.Destroy();
}
break;
case "Tank,Tank": //If two tanks collide
{
Bounce(a, b); //Bounce the tanks off of each other (Easy to stop repeat collisions)
(a as Tank).Damage(); //Damage both tanks
(b as Tank).Damage();
}
break;
case "Bullet,Bullet": //If two bullets collide, destroy them both
{
a.Destroy();
b.Destroy();
}
break;
case "Turret,Tank": //If a turret collides with a tank, bounce the tanks, and damage the turret's tank.
{
Bounce(a.Parent, b);
(a.Parent as Tank).Damage();
}
break;
case "Tank,Turret": //Inverted case of previous
{
Bounce(a, b.Parent);
(b.Parent as Tank).Damage();
}
break;
case "Turret,Bullet": //If a turret collides with a bullet, damage the turret's tank, destroy the bullet
{
(a.Parent as Tank).Damage(10);
b.Destroy();
}
break;
case "Bullet,Turret": //Inverted case of previous
{
a.Destroy();
(b.Parent as Tank).Damage(10);
}
break;
case "Tank,Bullet": //If a tank collides with a bullet, damage the tank, destroy the bullet
{
(a as Tank).Damage(10);
b.Destroy();
}
break;
case "Bullet,Tank": //Inverted case of previous
{
a.Destroy();
(b as Tank).Damage(10);
}
break;
default: //If anything else
Console.WriteLine("Unexpected collision between " + a.GetType().Name + " and " + b.GetType().Name); //Record unexepected collision
break;
}
;
}
Collisions = null; //Clear the current list of collisions
}
