Can I change the pen width & color of the bbox?

Answered

高偉恆

August 13, 2024 10:02

As the title, I'm using "pushMetadataPacket" to draw the bbox. Can I change the pen width & color of the bbox?

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• 

  Ichiro

  • Network Optix team

  August 14, 2024 05:39

  Hi 高偉恆

  Thanks for your question. Just to confirm - You will be asking the object boundary box on the client.

  1
• 

  高偉恆

  August 14, 2024 05:42

  Hi, Ichiro

  Yes. Sorry for my poor English.

  Thx

  0
• 

  Ichiro

  • Network Optix team

  August 15, 2024 05:28

  Hi 高偉恆

  There are two parts - the color and the width.

  1.For the color of a boundary box, yes, this is doable. 
  You would need to define it accordingly in the generateObjectMetadataPacket function.
  For example, the follow sample is to change for every new frame to a random color for the Sample plugin(in SDK sample):
   

  // Calculate bounding box coordinates each frame so that it moves from the top left corner
  // to the bottom right corner during kTrackFrameCount frames.
  
  staticconstexprfloatd = 0.5F / kTrackFrameCount;
  staticconstexprfloatwidth = 0.5F;
  staticconstexprfloatheight = 0.5F;
  
  constintframeIndexInsideTrack = m_frameIndex % kTrackFrameCount;
  constfloatx = d * frameIndexInsideTrack;
  constfloaty = d * frameIndexInsideTrack;
  
  objectMetadata->setBoundingBox(Rect(x, y, width, height));
  
  std::srand(time(NULL));
  intRR = rand() % 0xFF;
  intGG = rand() % 0xFF;
  intBB = rand() % 0xFF;
  
  std::stringstreamcolorCode;
  colorCode<<std::hex<<RR<<std::hex<<GG<<std::hex<<BB;
  NX_PRINT<<"nx.sys.color "<<colorCode.str();
  
  objectMetadata->addAttribute(makePtr<Attribute>("nx.sys.color", "#"+colorCode.str()));
  objectMetadataPacket->addItem(objectMetadata.get());

   
  Please be noticed that the bounding boxes color information will be kept within the archive as a part of the metadata stream.

  

   

  2. For the width of the boundary box, currently it is not supported unfortunately, but we will put this request in our backlog and will be discussed with our product and SDK team.

  Thanks for your feedback and understandings.

   

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