Function DoRayBox

TombEngine/Game/control/los.cpp:289–385

}

static bool DoRayBox(const GameVector& origin, const GameVector& target, const GameBoundingBox& bounds,
	const Pose& objectPose, Vector3i& hitPos, int closestItemNumber)
{
	auto box = bounds.ToBoundingOrientedBox(objectPose);

	auto rayOrigin = origin.ToVector3();
	auto rayDir = (target - origin).ToVector3();
	rayDir.Normalize();

	// Don't test spheres if no intersection.
	float dist = 0.0f;
	if (rayDir == Vector3::Zero || !box.Intersects(rayOrigin, rayDir, dist))
		return false;

	// Get raw collision point.
	auto collidedPoint = Geometry::TranslatePoint(rayOrigin, rayDir, dist);
	hitPos.x = collidedPoint.x - objectPose.Position.x;
	hitPos.y = collidedPoint.y - objectPose.Position.y;
	hitPos.z = collidedPoint.z - objectPose.Position.z;

	// Test single spheres in case of items.
	int meshIndex = 0;
	int bit = 0;
	int sp = -2;
	float minDist = FLT_MAX;

	if (closestItemNumber < 0)
	{
		// Static meshes don't require further tests.
		sp = -1;
		minDist = dist;
	}
	else
	{
		// Test spheres instead for items.
		auto* item = &g_Level.Items[closestItemNumber];
		auto* object = &Objects[item->ObjectNumber];

		if (object->nmeshes <= 0)
			return false;

		meshIndex = object->meshIndex;

		auto spheres = item->GetSpheres();
		for (int i = 0; i < object->nmeshes; i++)
		{
			// If mesh is visible.
			if (item->MeshBits & (1 << i))
			{
				const auto& sphere = spheres[i];

				float dist = 0.0f;
				if (sphere.Intersects(rayOrigin, rayDir, dist))
				{
					// Test for minimum distance.
					if (dist < minDist)
					{
						minDist = dist;