public PickUpGen(CoreEngine c, Vector3 p, PickUp.PickUpType t)
{
core = c;
pos = p;
itemType = t;
held = null;
genTime = 300;
}
public void removePickUp()
{
if (held != null)
core.physicsEngine.removeFromCollisionGrid(held);
held = null;
}
public void genPickUp(PickUp.PickUpType type)
{
held = new PickUp(pos + new Vector3(0, 50, 0), itemType, this);
core.physicsEngine.updateCollisionCellsFor(held);
}
public bool collidesWithPickup(Vector3 moverRadius, Vector3 basePoint, Vector3 velocity, PickUp collidable)
{
/* we cast a ray from the center of collider to the center of
* collidable. if the collision time is closer (or sufficiently close)
* for collidable then we're colliding
*/
BoundingBox otherbb = ((ICollidable)collidable).getBoundingBox();
Vector3 otherRadius = (otherbb.Max - otherbb.Min) * 0.5f,
otherPos = otherbb.Min + otherRadius;
//now convert everything otherESpace so that we can cast using BoundingSpheres
Vector3 basePointInOtherESpace = toESpace(otherRadius, toWorldSpace(moverRadius, basePoint)),
otherPointInOtherESPace = toESpace(otherRadius, otherPos);
Ray r = new Ray(basePointInOtherESpace, Vector3.Normalize(otherPointInOtherESPace - basePointInOtherESpace));
Nullable<float> dist = r.Intersects(new BoundingSphere(otherPointInOtherESPace, 1));
if (dist != null) { //i don't even know what dist == null means in this context
//find the collisionPoint in otherESpace
Vector3 colPoint = r.Position + dist.Value * r.Direction;
//convert it back to normal eSpace (of basePoint)
colPoint = toESpace(moverRadius, toWorldSpace(otherRadius, colPoint));
float colDist = Vector3.Distance(colPoint, basePoint);
//if the distance is < 1 + epsilon (the radius of the collider in eSpace) then we've collided
if (colDist < 1 + 0.5) {
float t = colDist / (float)Math.Sqrt(Vector3.Dot(velocity, velocity));
return true;
}
}
return false;
}
public void genPickUp(PickUp.PickUpType type)
{
held = new PickUp(pos + new Vector3(0, 50, 0), itemType, this);
core.physicsEngine.updateCollisionCellsFor(held);
}
