Drape Aerial

John Kennedy
John Kennedy
in Other
Is there a way to generate a 3d terrain surface then drape an aerial photo over the surface?

Comments

  • Sakko
    Sakko
    Generation of a terrain Surface....

    There is no command for creating/generating a native surface  entity in Bricscad (surfaces are not yet suported)
    and therefore no way to triangulate one from :

    • 3D points and other entities drawn already  within the DWG or
    • imported from a TIN or comma/TAB delimited text file .

    So the only way i know using Bricscad, is using the free beta BIM module (for Bricscad 13.2x Pro or Platinum only 32 bit) available at 

    https://www.bricsys.com/common/applications/application.jsp?app=70&apploc=1123

    and reading a TIN file containing the surface points or selecting the points and other entities in the DWG
    using the DTM command . The command creates a DTM terrain model which can be used
    to create a Control Surface Definition, which can then be pasted as a polyface mesh into the DWG.
    At this point you get a triangulated polyface mesh entity.

    Draping an aerial photo over the surface....
    again the only way is to use the aerial photo as a material and attach it to the above created surface (or to an imported native surface)
    A material definition must be created in the Drawing Explorer from the aerial photo.
    The scale of the mapping onto the surface and the insertion position are important for the correct mapping (see attached mapping.jpg).
    The drawback of all this is that the photo is visible and can be plotted only in a viewport
    using a visual style with Materials and Textures ON     (e.g. Realistic, Conceptual etc)
    In the attached DWG,  a google image is used, attached and scaled 1:1 with the _imageattach command just for control purposes.
    The same image is then used as material and attached to a true lofted surface and to the polyface mesh generated in the BIM Module (on thr right).
    You can use my free tools to produce lofted and swept true Surfaces at
    https://forum.bricsys.com/discussion/17053#20611
    Have a look also at  http://landtm.com/

    You find the Details and DWG attached
    I hope this helps




    imageProperties.jpg
    imageDTM3D.jpg

    DTM.dwg

    imageMapping.jpg
    imageDTM2D.jpg
  • William Castillo
    William Castillo

    Please take a look to this application:

    https://www.bricsys.com/common/applications/application.jsp?app=324&apploc=1037

    It's very eazy to create TIN & Contours from a point cloud.

    Regards

  • William Castillo
    William Castillo

    Also you will need this evaluation key:  778F-8E6A-B4-8C00-8FF6

This discussion has been closed.