Function updateRoadMotion

src/OpenLoco/src/Vehicles/Vehicle.cpp:448–498

0x0047C7FA

    // 0x0047C7FA
    static UpdateMotionResult updateRoadMotion(VehicleBase& component, int32_t distance, bool isVeh2UnkM15)
    {
        UpdateMotionResult result{};
        component.remainingDistance += distance;
        bool hasMoved = false;
        auto intermediatePosition = component.position;
        while (component.remainingDistance >= 0x368A)
        {
            hasMoved = true;
            auto newSubPosition = component.subPosition + 1U;
            const auto subPositionDataSize = World::TrackData::getRoadSubPositon(component.trackAndDirection.road._data).size();
            // This means we have moved forward by a road piece
            if (newSubPosition >= subPositionDataSize)
            {
                if (!updateRoadMotionNewRoadPiece(component, result.flags, isVeh2UnkM15))
                {
                    result.remainingDistance = component.remainingDistance - 0x3689;
                    component.remainingDistance = 0x3689;
                    result.flags |= UpdateVar1136114Flags::unk_m00;
                    break;
                }
                else
                {
                    newSubPosition = 0;
                }
            }
            // 0x0047C95B
            component.subPosition = newSubPosition;
            const auto& moveData = World::TrackData::getRoadSubPositon(component.trackAndDirection.road._data)[newSubPosition];
            const auto nextNewPosition = moveData.loc + World::Pos3(component.tileX, component.tileY, component.tileBaseZ * World::kSmallZStep);
            component.remainingDistance -= kMovementNibbleToDistance[getMovementNibble(intermediatePosition, nextNewPosition)];
            intermediatePosition = nextNewPosition;
            component.spriteYaw = moveData.yaw;
            component.spritePitch = moveData.pitch;
            if (component.isVehicleBogie())
            {
                // collision checks
                auto collideResult = checkForCollisions(*component.asVehicleBogie(), intermediatePosition);
                if (collideResult != EntityId::null)
                {
                    result.flags |= UpdateVar1136114Flags::crashed;
                    result.collidedEntityId = collideResult;
                }
            }
        }
        if (hasMoved)
        {
            component.moveTo(intermediatePosition);
        }
        return result;
    }

    static UpdateMotionResult updateTrackMotion(VehicleBase& component, int32_t distance, bool isVeh2UnkM15)
    {