wavefront

问题 I do have an OBJ file that looks like this: # This file uses centimeters as units for non-parametric coordinates. # first element v -0.017050 -0.017928 0.005579 v -0.014504 -0.017928 0.010577 . . v -0.000000 -0.017928 0.017967 vt 0.397581 0.004762 vt 0.397544 0.034263 . . vt 0.397507 0.063764 vn -0.951057 0.000000 0.309016 vn -0.809017 0.000000 0.587785 . . vn -0.587785 0.000000 0.809017 f 1/1/1 2/2/2 21/4/3 f 21/4/3 2/2/2 22/3/4 . . f 3/5/5 4/7/7 23/6/6 # second element v -0.014504 0.017928

问题 I'm building a cross platform 3D viewing application in C#/C++ and would like to add support for Autodesk SVF files. I looked at Autodesk Forge but it has limited support for exporting to open formats such as OBJ, and Autodesk SVF does not appear to be the same format as the similarly named Simple Vector Format (http://www.svf.org/) as was stated here: https://forge.autodesk.com/blog/updated-little-more-detail-behind-autodesk-forge-apis-0 Is there a schema or specification available somewhere

问题 I'm trying to implement a ray caster and I'm starting out with simple .obj files (utah-teapot) and currently I only made classes for Spheres and Triangles, I basically have all the functions for the intersections, generating view rays, etc.. all ready but I just can't seem to be able to parse the .obj file into triangles (three vectors each) so I can have the ray casting possible on custom .obj files instead of just spheres. This is my current .obj file parser (didn't include the full working

问题 I tried to read obj file with pyopengl but error come from glGenList(1) I just want to read the file and display in opengl Pls can you help me with full code; Am tired of stack and error it took me 3hrd to post this from OpenGL.GL import * from tkinter import messagebox import sys filename = input('pls input file path: ') class OBJ: def __init__(self, filename, swapyz=False): """Loads a Wavefront OBJ file. """ self.vertices = [] self.normals = [] self.texcoords = [] self.faces = [] material =

问题 import pygame import OpenGL from pygame.locals import * from OpenGL.GL import * from OpenGL.GLU import * import pywavefront scene = pywavefront.Wavefront('Handgun_obj.obj') vertices =( (1,-1,-1), (1,1,-1), (-1,1,-1), (-1,-1,-1), (1,-1,1), (1,1,1), (-1,-1,1), (-1,1,1), ) edges = ( (0,1), (0,3), (0,4), (2,1), (2,3), (2,7), (6,3), (6,4), (6,7), (5,1), (5,4), (5,7) ) colors = ( (1,0,0), (0,1,0), (0,0,1), (0,1,0), (1,1,1), (0,1,1), (1,0,0), (0,1,0), (0,0,1), (1,0,0), (1,1,1), (0,1,1), ) surfaces =

问题 import pygame import OpenGL from pygame.locals import * from OpenGL.GL import * from OpenGL.GLU import * import pywavefront scene = pywavefront.Wavefront('Handgun_obj.obj') vertices =( (1,-1,-1), (1,1,-1), (-1,1,-1), (-1,-1,-1), (1,-1,1), (1,1,1), (-1,-1,1), (-1,1,1), ) edges = ( (0,1), (0,3), (0,4), (2,1), (2,3), (2,7), (6,3), (6,4), (6,7), (5,1), (5,4), (5,7) ) colors = ( (1,0,0), (0,1,0), (0,0,1), (0,1,0), (1,1,1), (0,1,1), (1,0,0), (0,1,0), (0,0,1), (1,0,0), (1,1,1), (0,1,1), ) surfaces =

问题 Hi I am trying to map a texture to 3d mesh using Mayavi and Python bindings of vtk. I am visualising an .obj wavefront. This obj is 3D photograph of a face. The texture image is a composite of three 2D photographs. Each node in the mesh has an (uv) co-ordinate in the image, which defines its color. Different regions of the mesh draw their colours from different sections of the image. To illustrate this I have replaced the actual texture image with this one: And mapped this to the mesh instead

问题 Hi I am trying to map a texture to 3d mesh using Mayavi and Python bindings of vtk. I am visualising an .obj wavefront. This obj is 3D photograph of a face. The texture image is a composite of three 2D photographs. Each node in the mesh has an (uv) co-ordinate in the image, which defines its color. Different regions of the mesh draw their colours from different sections of the image. To illustrate this I have replaced the actual texture image with this one: And mapped this to the mesh instead

问题 I am creating an OBJ parser which reads the file and draw it using glDrawElements. The thing here is the model is correctly drawn but when I try to give it a texture, it is incorrectly mapped. I have read here that "OpenGL can only use one index buffer, whereas OBJ use one index buffer by attribute". I have also researched about the textures being incorrectly mapped when using glDrawElements and found out that I need to rearrange the textures because only vertices are shared but not the

问题 An artist gave me all 3D models for me exporting to .obj and .mtl in order that I can render it using OpenGL. But I can't figure out why the texture vertex are greater than 1 and sometimes negative. Take a look at this example: (...) vn -0.000717425 0.00106739 -0.00991695 vn 3.49779e-09 -5.22866e-09 -0.01 vn -0.00142294 0.00211706 -0.00966919 vn -0.00831486 -0.00555545 0 vt 5.82424 -20.091 vt 6.97527 -20.1873 vt 5.81848 -20.1618 vt -7.48189 8.29159 (...) He sent me all textures on TGA format,