Function ChaseCamera

TombEngine/Game/camera.cpp:550–655

}

void ChaseCamera(ItemInfo* item)
{
	static const unsigned int maxSwivelSteps = 5;

	if (!Camera.targetElevation)
		Camera.targetElevation = -ANGLE(10.0f);

	Camera.targetElevation += item->Pose.Orientation.x;
	UpdateCameraElevation();

	// Clamp X orientation.
	if (Camera.actualElevation > ANGLE(85.0f))
		Camera.actualElevation = ANGLE(85.0f);
	else if (Camera.actualElevation < ANGLE(-85.0f))
		Camera.actualElevation = ANGLE(-85.0f);

	// Force item position after exiting look mode to avoid weird movements near walls.
	if (Camera.oldType == CameraType::Look)
	{
		Camera.target.x = item->Pose.Position.x;
		Camera.target.z = item->Pose.Position.z;
	}

	int distance = Camera.targetDistance * phd_cos(Camera.actualElevation);

	auto pointColl = GetPointCollision(Vector3i(Camera.target.x, Camera.target.y + CLICK(1), Camera.target.z), Camera.target.RoomNumber);

	if (TestEnvironment(ENV_FLAG_SWAMP, pointColl.GetRoomNumber()))
		Camera.target.y = g_Level.Rooms[pointColl.GetRoomNumber()].TopHeight - CLICK(1);

	int y = Camera.target.y;
	pointColl = GetPointCollision(Vector3i(Camera.target.x, y, Camera.target.z), Camera.target.RoomNumber);
	if (((y < pointColl.GetCeilingHeight() || pointColl.GetFloorHeight() < y) || pointColl.GetFloorHeight() <= pointColl.GetCeilingHeight()) ||
		(pointColl.GetFloorHeight() == NO_HEIGHT || pointColl.GetCeilingHeight() == NO_HEIGHT))
	{
		TargetSnaps++;
		Camera.target = LastTarget;
	}
	else
	{
		TargetSnaps = 0;
	}

	for (int i = 0; i < maxSwivelSteps; i++)
		Ideals[i].y = Camera.target.y + (Camera.targetDistance * phd_sin(Camera.actualElevation));

	// Determine best player viewing angle.
	float farthestDist = FLT_MAX;
	int indexOfFarthestIdeal = 0;
	GameVector temp[2];
	for (int i = 0; i < maxSwivelSteps; i++)
	{
		// Incrementally swivel camera position.
		short angle = (i == 0) ? Camera.actualAngle : ((i - 1) * ANGLE(90.0f));

		// Record ideal position at default distance for given swivel.
		Ideals[i].x = Camera.target.x - (distance * phd_sin(angle));
		Ideals[i].z = Camera.target.z - (distance * phd_cos(angle));