As mentioned, the problem is very hard and is often also referred to as multi-view object reconstruction. It is usually approached by solving the stereo-view reconstruction problem for each pair of consecutive images. Performing stereo reconstruction requires that pairs of images are taken that have a good amount of visible overlap of physical points. You … Read more
Try with this: var width = 640, height = 480; var widthHalf = width / 2, heightHalf = height / 2; var vector = new THREE.Vector3(); var projector = new THREE.Projector(); projector.projectVector( vector.setFromMatrixPosition( object.matrixWorld ), camera ); vector.x = ( vector.x * widthHalf ) + widthHalf; vector.y = – ( vector.y * heightHalf ) + … Read more
I know what file format you are referring to. The file format you use (.anim) has one more skeletal file with (.inv_bind_mats) extension and same name, you don’t need to calculate anything but just read .inv_bind_mats file.
here are some other good links for mesh generation and its related work. • TetGen : A Quality Tetrahedral Mesh Generator http://wias-berlin.de/software/tetgen/ • CGal-Computational Geometry Algorithms Library http://www.cgal.org/. http://www.cgal.org/Manual/latest/doc_html/cgal_manual/packages.html#Pkg:Triangulation3. http://www.cgal.org/Manual/latest/doc_html/cgal_manual/contents.html#part_VI. http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Surface_reconstruction_points_3/Chapter_main.html. 3D Surface Mesh Generation – http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Surface_mesher/Chapter_main.html • GTSLibrary – The GNU Triangulated Surface Library. http://gts.sourceforge.net/index.html • Jonathan Shewchuk – http://www.cs.berkeley.edu/~jrs/ http://www.cs.cmu.edu/~quake/robust.html • VTK: The … Read more
The relevant input data to your problem are the texture coordinates. Tangent and Binormal are vectors locally parallel to the object’s surface. And in the case of normal mapping they’re describing the local orientation of the normal texture. So you have to calculate the direction (in the model’s space) in which the texturing vectors point. … Read more
We have our own JSON Geometry format. You can use these: Editor (drag your object into the window, select it and select File/Export Geometry) Blender exporter Python script from OBJ to JSON
Note the example given is a left-handed, row major matrix. So the operation is: Translate to the origin first (move by –eye), then rotate so that the vector from eye to At lines up with +z: Basically you get the same result if you pre-multiply the rotation matrix by a translation –eye: [ 1 0 … Read more
THREE.MeshLambertMaterial extends THREE.Material which means it inherits the opacity property, so all you need to do is access the material on your object, and change the opacity of the material: object.materials[0].opacity = 1 + Math.sin(new Date().getTime() * .0025);//or any other value you like Also note that the material must have it’s transparent property set to … Read more
Good question. The answer is it depends!! On a more useful note, I can say this: A few years ago I developed a CAD-style 3D rendering application in OpenGL. This had to display CAD models of oil rigs with up to 1,000,000 objects and allow the user to zoom right into detail, or zoom out, … Read more
The 3D scatterplot linked to by VividD and Lars Kotthoff is probably the best example of what you’re asking for, but I’m going to be contrary and suggest that maybe you’re asking the wrong question. Trying to simulate three spatial dimensions on a flat screen will always be imperfect and make it difficult to read … Read more