<div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Well,as the subject notes,The software in my dev job has to use a HUD to show 2d pics. Generally using a camera to create a new viewport to show the pic will be OK. <br>
But the 'Entity' base class for the software system uses a MT (matrixtransform) to add the detailed entity node(such as basic geometry,text with a geode) and then add this MT node to the root by the datacontainer manager class. <br> If I create the hud entity class derived from the base class, ie, add the camera node to the MT node,does it work if I operate the move, scale commands to this hud entity by using MT,not the camera? If it doesn't work, how can I change the node structure to make the Hud entity responsive to the transform operations which is generated by MT.Or do I only have to use the camera node itself to do these transformation jobs?<br></blockquote><div><br></div><div>I'm afraid I didn't understand this explanation very well myself. My first question would be, do the HUD elements (the 2d pics) stay stuck to the screen space (as if they were part of a game scoreboard overlaid onto the screen) or do the move around the screen as the main view camera rotates, tilts, moves, etc like an Augment Reality environment?</div><div><br></div><div>-- <br></div></div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div style="text-align:center">Chris 'Xenon' Hanson, omo sanza lettere. Xenon@AlphaPixel.com <a href="http://www.alphapixel.com/" target="_blank">http://www.alphapixel.com/</a></div><div style="text-align:center">Training • Consulting • Contracting</div><div style="text-align:center">3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL</div><div style="text-align:center"><span style="font-size:12.8px">Legal/IP •</span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">Forensics •</span><span style="font-size:12.8px"> </span>Imaging <span style="font-size:12.8px">•</span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">UAVs </span><span style="font-size:12.8px">• GIS • GPS • osgEarth • Terrain • Telemetry • Cryptography • LIDAR • Embedded • Mobile • iPhone/iPad/iOS • Android</span></div><div style="text-align:center"><a href="https://twitter.com/alphapixel" target="_blank">@alphapixel</a> <a href="http://facebook.com/alphapixel" target="_blank">facebook.com/alphapixel</a> (775) 623-PIXL [7495]<br></div></div></div></div></div></div></div>