<div dir="ltr">Hi Eric,<div><br></div><div>have a look at CameraManipulator->setHomePosition()</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 22, 2020 at 3:20 PM Erik Hensens <<a href="mailto:hensens@gmail.com">hensens@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Thank you all so much for your help on this. Generally speaking, what is the proper approach if I want to set the initial view to a specific look-at but after that I want the default manipulator to behave as normal?<div><br>On Tuesday, April 21, 2020 at 1:43:45 AM UTC-5, Erik Hensens wrote:<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hello everyone,<div><br></div><div>I am trying to change the camera's perspective by calling setViewMatrixAsLookAt, but it is not making any change in the orientation of my scene. Here is the full code for the simplest application that reproduces my problem. There must be something I'm fundamentally misunderstanding here. I appreciate any and all help! Thanks in advance!</div><div><br></div><div><div style="background-color:rgb(250,250,250);border-color:rgb(187,187,187);border-style:solid;border-width:1px"><code><div><span style="color:rgb(136,0,0)">#include</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">/</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(136,0,0)">#include</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">/</span><span style="color:rgb(102,0,102)">ShapeDrawable</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(136,0,0)">#include</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osgViewer</span><span style="color:rgb(102,102,0)">/</span><span style="color:rgb(102,0,102)">Viewer</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"><br><br><br></span><span style="color:rgb(136,0,0)">// Get a new sphere geode</span><span style="color:rgb(0,0,0)"><br>osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,0,102)">CreateSphereGeode</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(0,0,0)"> tCenter</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(136,0,0)">// The location of the center of the sphere</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec4</span><span style="color:rgb(0,0,0)"> tColor</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(136,0,0)">// The color of the sphere</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(0,0,136)">float</span><span style="color:rgb(0,0,0)"> fRadius </span><span style="color:rgb(136,0,0)">// The sphere radius</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(102,102,0)">)</span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(102,102,0)">{</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(136,0,0)">// Create the geode to return</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pRetv </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,0,136)">new</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">;</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Create the sphere</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Sphere</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pSphere </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,0,136)">new</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Sphere</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">tCenter</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> fRadius</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Create the drawable</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">ShapeDrawable</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pSphereDrawable </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,0,136)">new</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">ShapeDrawable</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">pSphere</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Set the color</span><span style="color:rgb(0,0,0)"><br> pSphereDrawable</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">setColor</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">tColor</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Add the drawable</span><span style="color:rgb(0,0,0)"><br> pRetv</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">addDrawable</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">pSphereDrawable</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Return this geode</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(0,0,136)">return</span><span style="color:rgb(0,0,0)"> pRetv</span><span style="color:rgb(102,102,0)">;</span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(102,102,0)">}</span><span style="color:rgb(0,0,0)"><br><br><br></span><span style="color:rgb(136,0,0)">// The main application entry point</span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(0,0,136)">int</span><span style="color:rgb(0,0,0)"> main</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,136)">int</span><span style="color:rgb(0,0,0)"> argc</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,0,136)">char</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)">*</span><span style="color:rgb(0,0,0)">argv</span><span style="color:rgb(102,102,0)">[])</span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(102,102,0)">{</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(136,0,0)">// Create the viewer</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osgViewer</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Viewer</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pViewer </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,0,136)">new</span><span style="color:rgb(0,0,0)"> osgViewer</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Viewer</span><span style="color:rgb(102,102,0)">;</span><span style="color:rgb(0,0,0)"><br> <br> </span><span style="color:rgb(136,0,0)">// Create the top group parent</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Group</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pTopGroup </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,0,136)">new</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Group</span><span style="color:rgb(102,102,0)">;</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Create some spheres</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pSphere1 </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,0,102)">CreateSphereGeode</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec4</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">2.0f</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pSphere2 </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,0,102)">CreateSphereGeode</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">10.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">5.0f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec4</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(0,0,0)">ref_ptr</span><span style="color:rgb(102,102,0)"><</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Geode</span><span style="color:rgb(102,102,0)">></span><span style="color:rgb(0,0,0)"> pSphere3 </span><span style="color:rgb(102,102,0)">=</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,0,102)">CreateSphereGeode</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(102,102,0)">(-</span><span style="color:rgb(0,102,102)">15.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">6.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec4</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">1.0f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">4.0f</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Add these spheres to the top group node</span><span style="color:rgb(0,0,0)"><br> pTopGroup</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">addChild</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">pSphere1</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br> pTopGroup</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">addChild</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">pSphere2</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br> pTopGroup</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">addChild</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">pSphere3</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Here I am attempting to change the initial perspective, but I can make these numbers anything and it doesn't seem to change anything</span><span style="color:rgb(0,0,0)"><br> pViewer</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">getCamera</span><span style="color:rgb(102,102,0)">()-></span><span style="color:rgb(0,0,0)">setViewMatrixAsLookAt</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(102,102,0)">(-</span><span style="color:rgb(0,102,102)">0.9983f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(0,102,102)">0.0252f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)">-</span><span style="color:rgb(0,102,102)">0.0530f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">0.8639f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)">-</span><span style="color:rgb(0,102,102)">2.5189f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)">-</span><span style="color:rgb(0,102,102)">70.0939f</span><span style="color:rgb(102,102,0)">),</span><span style="color:rgb(0,0,0)"><br> osg</span><span style="color:rgb(102,102,0)">::</span><span style="color:rgb(102,0,102)">Vec3</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,102,102)">0.8880f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)">-</span><span style="color:rgb(0,102,102)">1.5194f</span><span style="color:rgb(102,102,0)">,</span><span style="color:rgb(0,0,0)"> </span><span style="color:rgb(102,102,0)">-</span><span style="color:rgb(0,102,102)">70.0726f</span><span style="color:rgb(102,102,0)">)</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br> <br> </span><span style="color:rgb(136,0,0)">// Add a viewport to the viewer and attach the scene graph</span><span style="color:rgb(0,0,0)"><br> pViewer</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">setSceneData</span><span style="color:rgb(102,102,0)">(</span><span style="color:rgb(0,0,0)">pTopGroup</span><span style="color:rgb(102,102,0)">);</span><span style="color:rgb(0,0,0)"><br><br><br> </span><span style="color:rgb(136,0,0)">// Run the viewer</span><span style="color:rgb(0,0,0)"><br> </span><span style="color:rgb(0,0,136)">return</span><span style="color:rgb(0,0,0)"> pViewer</span><span style="color:rgb(102,102,0)">-></span><span style="color:rgb(0,0,0)">run</span><span style="color:rgb(102,102,0)">();</span><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(102,102,0)">}</span></div></code></div><div><br></div></div></div></blockquote></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature">trajce nikolov nick<br></div>
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