void CircleCollisionResolution(CircleCollider other)
{
Vector2 closestPoint = ClosestPoint(parent.Position);
Vector2 diff = other.Parent.attachedTo.GetPosition() - closestPoint;
float length = diff.Length();
if (Math.Abs(diff.x / (HalfExtents.x * 2)) > Math.Abs(diff.y / (HalfExtents.y * 2)))
{
//x vector longer than y
if (other.Parent.attachedTo.GetPosition().x > parent.attachedTo.GetPosition().x)
{
//we are right
parent.attachedTo.SetPosition(parent.attachedTo.GetPosition().x + (other.Radius - length + 1), parent.attachedTo.GetPosition().y);
}
else
{
//we are left
parent.attachedTo.SetPosition(parent.attachedTo.GetPosition().x - (other.Radius - length + 1), parent.attachedTo.GetPosition().y);
}
}
else
{
//y longer than x
if (other.Parent.attachedTo.GetPosition().y > parent.attachedTo.GetPosition().y)
{
//we are below
parent.attachedTo.SetPosition(parent.attachedTo.GetPosition().x, parent.attachedTo.GetPosition().y + (other.Radius - length + 1));
}
else
{
//we are above
parent.attachedTo.SetPosition(parent.attachedTo.GetPosition().x, parent.attachedTo.GetPosition().y - (other.Radius - length + 1));
}
}
}
void CircleCollisionResolution(CircleCollider other)
{
var dist = parent.attachedTo.GetPosition() - other.parent.attachedTo.GetPosition();
var length = (other.parent.Position - parent.Position).Length();
Vector2 unit = new Vector2(dist.x / length, dist.y / length);
parent.attachedTo.SetPosition(other.parent.attachedTo.GetPosition().x + (radius + other.radius + 1) * unit.x, other.parent.attachedTo.GetPosition().y + (radius + other.radius + 1) * unit.y);
}
//check for collsion with another circle collider
bool CircleCollision(CircleCollider other)
{
//if distance between the 2 circles is less than the 2 circles radie combined to the power of 2
if ((other.parent.Position - parent.Position).LengthSquared() <= (Math.Pow(radius + other.radius, 2)))
{
//collision has occured
parent.DebugColour = Color.BLUE;
parent.Collision = true;
other.parent.Collision = true;
return(true);
}
parent.Collision = false;
parent.DebugColour = Color.RED;
return(false);
}
//check for collision with a circle collider
bool CircleCollision(CircleCollider other)
{
//get the distance between the closest point on the AABB to the circle
Vector2 diff = ClosestPoint(other.Parent.Position) - other.Parent.Position;
// if the distance is less or equal to the circle radius^2
if (diff.LengthSquared() <= (other.Radius * other.Radius))
{
//collision has occured
parent.DebugColour = Color.BLUE;
parent.Collision = true;
other.Parent.Collision = true;
return(true);
}
parent.DebugColour = Color.RED;
parent.Collision = false;
return(false);
}
//create the collider
public Collider(CollisionType colType, GameObject AttachedTo)
{
attachedTo = AttachedTo;
position = attachedTo.GetPosition();
//create the collider and set the collision type
switch (colType)
{
case CollisionType.AABB:
aabb = new AABB(this);
collisionType = CollisionType.AABB;
break;
case CollisionType.Circle:
circle = new CircleCollider(this);
collisionType = CollisionType.Circle;
break;
}
}