/// <summary>
/// check if "other" collider is intersecting with this collider
/// </summary>
public bool CheckCollision(Collider other)
{
collisionChecksPerFrame++;
Vector3 center3 = new Vector3(center.X, center.Y, 0);
Vector3 otherCenter3 = new Vector3(other.center.X, other.center.Y, 0);
//distance between both objects
float dist = (float)Math.Sqrt((otherCenter3.x - center3.x) * (otherCenter3.x - center3.x) + (otherCenter3.y - center3.y) * (otherCenter3.y - center3.y));
//a maximum distance collisions need to be checked at
float range = new Vector3(boxTransform.m1, boxTransform.m2, 0).Magnitude() + new Vector3(boxTransform.m4, boxTransform.m5, 0).Magnitude()
+ new Vector3(other.boxTransform.m1, other.boxTransform.m2, 0).Magnitude() + new Vector3(other.boxTransform.m4, other.boxTransform.m5, 0).Magnitude();
if (dist > range)
{
return(false);//stop check we already know the two objects are too faar apart
}
{//other in this
Vector3 xExtent = new Vector3(boxTransform.m1, boxTransform.m2, 0);
Vector3 yExtent = new Vector3(boxTransform.m4, boxTransform.m5, 0);
{//other point A in this
Vector2 preV = other.pointA - center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointA.X, (int)other.pointA.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointA.X, (int)other.pointA.Y, GREEN);
#endif
return(true);
}
}
{//other point B in this
Vector2 preV = other.pointB - center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointB.X, (int)other.pointB.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointB.X, (int)other.pointB.Y, GREEN);
#endif
return(true);
}
}
{//other point C in this
Vector2 preV = other.pointC - center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointC.X, (int)other.pointC.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointC.X, (int)other.pointC.Y, GREEN);
#endif
return(true);
}
}
{//other point D in this
Vector2 preV = other.pointD - center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointD.X, (int)other.pointD.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)center.X, (int)center.Y, (int)other.pointD.X, (int)other.pointD.Y, GREEN);
#endif
return(true);
}
}
}
{//this in other
Vector3 xExtent = new Vector3(other.boxTransform.m1, other.boxTransform.m2, 0);
Vector3 yExtent = new Vector3(other.boxTransform.m4, other.boxTransform.m5, 0);
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)other.center.X + (int)xExtent.x, (int)other.center.Y + (int)xExtent.y, DARKPURPLE);
DrawLine((int)other.center.X, (int)other.center.Y, (int)other.center.X + (int)yExtent.x, (int)other.center.Y + (int)yExtent.y, DARKPURPLE);
#endif
{//this point A in other
Vector2 preV = pointA - other.center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointA.X, (int)pointA.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointA.X, (int)pointA.Y, GREEN);
#endif
return(true);
}
}
{//this point B in other
Vector2 preV = pointB - other.center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointB.X, (int)pointB.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointB.X, (int)pointB.Y, GREEN);
#endif
return(true);
}
}
{//this point C in other
Vector2 preV = pointC - other.center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointC.X, (int)pointC.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointC.X, (int)pointC.Y, GREEN);
#endif
return(true);
}
}
{//this point D in other
Vector2 preV = pointD - other.center;
Vector3 v = new Vector3(preV.X, preV.Y, 0);
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointD.X, (int)pointD.Y, RED);
#endif
collisionChecksPerFrame++;
if (!(Math.Sqrt(Math.Abs(v.Dot(xExtent))) > xExtent.Magnitude() || Math.Sqrt(Math.Abs(v.Dot(yExtent))) > yExtent.Magnitude()))
{
#if ShowCollisionDebug
DrawLine((int)other.center.X, (int)other.center.Y, (int)pointD.X, (int)pointD.Y, GREEN);
#endif
return(true);
}
}
}
return(false);
}
public float Distance(Vector3 other)
{
Vector3 diff = this - other;
return(diff.Magnitude());
}
