Function DropPickups

TombEngine/Game/pickup/pickup.cpp:865–981

}

void DropPickups(ItemInfo* item, bool disableAlignment)
{
	ItemInfo* pickup = nullptr;

	auto bounds = GameBoundingBox(item);
	auto extents = bounds.GetExtents();
	auto origin = Geometry::TranslatePoint(item->Pose.Position.ToVector3(), item->Pose.Orientation, bounds.GetCenter());
	auto yPos = GetPointCollision(*item).GetFloorHeight();

	origin.y = yPos; // Initialize drop origin Y point as floor height at centerpoint, in case all corner tests fail.

	auto collObjects = GetCollidedObjects(*item, true, true);

	short startAngle = ANGLE(Random::GenerateInt(0, 3) * 90.0f); // Randomize start corner.

	// Iterate through 4 corners and find best-fitting position, which is not inside a wall, not on a slope
	// and also does not significantly differ in height to an object centerpoint height.
	// If all corner tests will fail, a pickup will be spawned at bounding box centerpoint, as it does in tomb4.

	if (!disableAlignment) for (int corner = 0; corner < 4; corner++)
	{
		auto angle = item->Pose.Orientation;
		angle.y += startAngle + corner * ANGLE(90.0f);

		// At first, do an inside-wall test at an extended extent point to make sure player can correctly align.
		auto candidatePos = Geometry::TranslatePoint(origin, angle, extents * 1.2f);
		candidatePos.y = yPos;
		auto collPoint = GetPointCollision(candidatePos, item->RoomNumber);

		// If position is inside a wall or on a slope, don't use it.
		if (collPoint.GetFloorHeight() == NO_HEIGHT || collPoint.IsSteepFloor() || collPoint.GetBottomSector().Flags.Death)
			continue;

		// Remember floor position for a tested point.
		int candidateYPos = collPoint.GetFloorHeight();

		// Now repeat the same test for original extent point to make sure it's also valid.
		candidatePos = Geometry::TranslatePoint(origin, angle, extents);
		candidatePos.y = yPos;
		collPoint = GetPointCollision(candidatePos, item->RoomNumber);

		// If position is inside a wall or on a slope, don't use it.
		if (collPoint.GetFloorHeight() == NO_HEIGHT || collPoint.IsSteepFloor() || collPoint.GetBottomSector().Flags.Death)
			continue;

		// If position is not in the same room, don't use it.
		if (collPoint.GetRoomNumber() != item->RoomNumber)
			continue;

		// Setup a dummy sphere with 1-click diameter for item and static mesh collision tests.
		auto sphere = BoundingSphere(candidatePos, CLICK(0.5f));
		bool collidedWithObject = false;

		// Iterate through all found items and statics around, and determine if dummy sphere
		// intersects any of those. If so, try other corner.

		for (const auto* itemPtr : collObjects.Items)
		{