3d

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 15 days ago . Improve this question Are there any OpenGL 3D GUI libraries? and/or Are there any 3D assets like windows, list boxes, etc. that can be used in a 3D game engine? Something like Age 3D is a great start, http://www.youtube.com/watch?v=Cq8Qs8lqqFA, but they aren't around anymore. 回答1:

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 15 days ago . Improve this question Are there any OpenGL 3D GUI libraries? and/or Are there any 3D assets like windows, list boxes, etc. that can be used in a 3D game engine? Something like Age 3D is a great start, http://www.youtube.com/watch?v=Cq8Qs8lqqFA, but they aren't around anymore. 回答1:

问题 I tried determining camera motion from fundamental matrix using opencv. I'm currently using optical flow to track movement of points in every other frame. Essential matrix is being derived from fundamental matrix and camera matrix. My algorithm is as follows 1 . Use goodfeaturestotrack function to detect feature points from frame. 2 . Track the points to next two or three frames(Lk optical flow), during which calculate translation and rotation vectorsusing corresponding points 3 . Refresh

问题 I have two separate vectors of 3D data points that represent curves and I'm plotting these as scatter data in a 3D plot with matplotlib. Both the vectors start at the origin, and both are of unit length. The curves are similar to each other, however, there is typically a rotation between the two curves (for test purposes, I've actually being using one curve and applying a rotation matrix to it to create the second curve). I want to align the two curves so that they line up in 3D e.g. rotate

问题 I'm trying to plot cuboids of different sizes using matplotlib, such that: after rotation the cuboids do not overlap visually in a non-physical way, the cubes have different colors and a box drawn around them. I've read several blog posts and stackoverflow pages referencing similar problems, but always with a slight difference; none which have worked for me. The easiest way to overcome the overlapping problem was to use voxels (as in https://matplotlib.org/api/_as_gen/mpl_toolkits.mplot3d

问题 I am creating an app where I need to change textures(pattern) of my 3d object. I am using AR Core SDK and android. I have used the below code but it is not working. Texture.builder() .setSource(this,R.drawable.fabric3) .build() .thenAccept(t -> { BaseTransformableNode node = arFragment.getTransformationSystem().getSelectedNode(); if(node!=null){ node.getRenderable().getMaterial().setTexture("baseColorMap",t); } }); Documentation is also not helping me much. This is my SFA file { animations: [

问题 I am creating an app where I need to change textures(pattern) of my 3d object. I am using AR Core SDK and android. I have used the below code but it is not working. Texture.builder() .setSource(this,R.drawable.fabric3) .build() .thenAccept(t -> { BaseTransformableNode node = arFragment.getTransformationSystem().getSelectedNode(); if(node!=null){ node.getRenderable().getMaterial().setTexture("baseColorMap",t); } }); Documentation is also not helping me much. This is my SFA file { animations: [

问题 I have created a lovely 3D displacement vector field in python using Matplotlib and I am happy with the results. However, visually it is not very east to see the magnitude of the displacements only the direction. Is there a way in python that I could use a colour scale for the arrows so that the magnitude of the displacements is clearer/more visible. This is what I have so far #%% Import Libraries from mpl_toolkits.mplot3d import Axes3D import matplotlib.pyplot as plt import numpy as np #%%

问题 Is there a library in python or c++ that is capable of estimating normals of point clouds in a consistent way? In a consistent way I mean that the orientation of the normals is globally preserved over the surface. For example, when I use python open3d package: downpcd.estimate_normals(search_param=o3d.geometry.KDTreeSearchParamHybrid( radius=4, max_nn=300)) I get an inconsistent results, where some of the normals point inside while the rest point outside. many thanks 回答1: If you know the

问题 Got a simple .html file using A-Frame that loads a specific model. <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Octant Cube - by Dodds, H. & Peres, T.</title> <meta name="description" content="Present in the Taxonomy article"> <script src="https://aframe.io/releases/1.0.4/aframe.min.js"></script> </head> <body> <a-scene background="color: #FAFAFA"> <a-assets> <a-asset-item id="octant" src="octant.glb"></a-asset-item> </a-assets> <a-entity gltf-model="#octant"></a-entity> </body