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What's the best practice to pre-process parameter file I have a parameter yaml file, some of these parameters are easy t

What's the best practice to pre-process parameter file I have a parameter yaml file, some of these parameters are easy t

The correct byte sequence for 2 would be 0x02 0x00 0x00 0x00 at the first 4 bytes of buffer, and uint8 array_size should

I'm receiving some data from serial port and want to deserialize the byte stream I received to a ROS message.

The serial port data contains variable number of elements (elements with same type). So I use variable length array in my ROS message.

For example I have received these bytes in memory:

uint8_t buffer[] = { 0x02, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x03, 0x11, 0x11, 0x11, 0x11, 0x12, 0x12, 0x12, 0x12, 0x13, 0x13, 0x13, 0x13 };

Here,

• 0x02 means 2 elements in the variable length array,
• (0x01010101, 0x02020202, 0x03030303) is the first element, this is actually a 3-dimensional point with float type,
• (0x11111111, 0x12121212, 0x13131313) is the second element.

And I'm going to use this message:

uint8 array_size    # will be 0x02
geometry_msgs/Point32[] points    # will be a array with length 2, the first Point32 is (0x01010101, 0x02020202, 0x03030303), and the second one is (0x11111111, 0x12121212, 0x13131313)

It seems the tutorial does not work with variable length array. I checked the code, and there is a serializer for std::vector.

But the deserialization process goes wrong in this function:

// (line 348 of serialization.h)
template<typename Stream>
inline static void read(Stream& stream, VecType& v)
{
    uint32_t len;
    stream.next(len);
    v.resize(len);    // <----
    IteratorType it = v.begin();
    IteratorType end = v.end();
    for (; it != end; ++it)
    {
        stream.next(*it);
    }   
}

It seems the deserializer will change the length of the vector first. But the value of variable len gets very huge and v.resize(len) fails.

As gvdhoorn says, this will most likely lead stream.next(len) to read 4 bytes from buffer and consider them all part

As gvdhoorn says, this will most likely lead stream.next(len) to read 4 bytes from buffer and consider them all part

As gvdhoorn says, this will most likely lead stream.next(len) to read 4 bytes from buffer and consider them all part

As gvdhoorn says, this will most likely lead stream.next(len) to read 4 bytes from buffer and consider them all part

How to correctly deserialize a message with variable length array? I'm receiving some data from serial port and want to

How to correctly deserialize a message with variable length array? For example I have a message: uint8 array_size geome

How to correctly deserialize a message with variable length array? For example I have a message: uint8 array_size geome

How to correctly deserialize a message with variable length array? For example I have a message: uint8 array_size geome

How to correctly deserialize a message with variable length array? For example I have a message: uint8 array_size geome

How to correctly deserialize a message with variable length array? For example I have a message: uint8 array_size geome

How to correctly deserialize a message with variable length array? For example I have a message: uint8 array_size geome

Logging before a fatal exit For example I want to have a ROS node which opens serial port and reads some data. Here's th

Logging before a fatal exit For example I want to have a ROS node which opens serial port and reads some data. Here's th

Logging when have fatal error For example I want to have a ROS node which opens serial port and reads some data. Here's

Logging when have fatal error For example I want to have a ROS node which opens serial port and reads some data. Here's

I have some problem configuring the CLion IDE. It reports "catkin was neither found in workspace nor in the CMAKE_PREFIX_PATH" when building. I chaged the value of CMAKE_PREFIX_PATH in the cache, and that makes CLion working. However, afterwards, command "catkin_make" in console doesn't work.