Camera (DATA_CAMERA)

Camera Datatype Information

OpenFlipper includes a data type "DATA_CAMERA" for visualizing cameras. A camera consists of the modelview and the projection matrix. Additionally it requires the aspect ratio and the near/far plane distances.

Usage

To use the dataType, create an empty object of type DATA_CAMERA

// Variable which will store the id of the newly created object.
 int newObjectId = -1;
 
 // Emit the signal, that we want to create a new object of the specified type DATA_CAMERA
 emit addEmptyObject(DATA_CAMERA, newObjectId);
 
 // Get the newly created object
 CameraObject* object = PluginFunctions::getObject(newObjectId);
 
 if(object) {
 
     // Get the node
     CameraNode* cameraNode = object->cameraNode();
 
     // ...
       
 } else {
   // Something went wrong when creating the object.
   std::cerr << "Unable to create object" << std::endl;
 }

Now that you have the camera node, you have to set some variables.

• Set the Modelview Matrix: CameraNode::setModelView()
• Set the projection Matrix: CameraNode::setProjection()
• Set near and far plane: CameraNode::setFarPlane(), CameraNode::setNearPlane()
• Aspect ration of the setup: CameraNode::setAspectRation()

This will setup all required parameters of your camera. Don't forget to call

emit updatedObject(cameraObject->id(),UPDATE_ALL);

to make your changes visible.