The user needs to make required implementation and plumbing to call these functions. curl2mem basically writes the information from (this is where FlightGear will have its screenshot) to a predefined memory location. This structure contains two elements namely a pointer to memory and the size of the memory. The function curl2mem takes the pointer to a MemoryStruct structure as input. The WriteMemor圜allback is a function that is used by the libcurl function curl_easy_setopt to write the downloaded data into the memory. By using the 3 functions below (WriteMemor圜allback, curl2mem, get_bmp) one can download the screenshot from the FlightGear HTTP server and convert the jpeg image into bitmap data. Note that in order to indicate to the compiler that libcurl and libjpegīefore doing anything a module needs to be added to PaparazziUAV ( create a module). All of this code have been obtained from the reference material of the corresponding libraries and required modifications made for the specific implementation. Following this, the jpeg image data needs to be decompressed to obtain the pixel values using libjpeg. One requires the libcurl library to download the image from the HTTP server into memory. There is a limit to the rate at which these screenshots (I only tested this with approximately 1 fps) can be obtained thus it cannot be used to simulate high frame rate vision. This has been tested with PaparazziUAV v5.10 and FlightGear 2017.1.2.įlightGear can be run with an HTTP server which can be used to obtain screenshots of the current scenery in FlightGear. Than the exact details about running the applications are mentioned. First the required functions are presented and described. This page describes the steps required to obtain screenshots from FlightGear into the memory of PaparazziUAV.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |