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Questions tagged [wavefront]

OBJ (or .OBJ) is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visualizer animation package.

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Black window when render obj file in opengl

I used opengl in qt5 on ubuntu 18.4, i wanted to load a simple cube(store in an .obj file) and render it. I followed the tutorial here http://www.opengl-tutorial.org/beginners-tutorials/tutorial-7-model-loading/, but i got a black window at last.…
Bruce
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How can I parse a simple .obj file into triangles?

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…
Josh Aston
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Assign mirror operation to vertices array

I understand the math in flipping vertex coordinates in a .obj vertices array to get the mirrored coordinate across a plane/axis. But, how do you populate the vertices array for an actual mirror operation (as opposed to just a flip)
ina
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Extending Wavefront OBJ for bones

I'm extending Wavefront OBJ to use bones with it. Here's my example: bn my_bone 0.0 0.0 0.0 wgh 1 1.0 wgh 2 1.0 wgh 3 1.0 wgh 4 1.0 wgh 5 1.0 bn my_bone2 1.0 0.0 0.0 prt my_bone wgh 11 0.1 wgh 12 0.2 wgh 13 0.3 Here's the description: Bones: bn…
paxbun
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Is there something wrong with my OBJ file reader?

I had implemented code that read .obj files for my Ray-Tracer, construct a bunch of triangles and send it to be rendered by a ray-tracer. And it works........for the first kind of .obj files that I tried. For instance, with files that presented.…
user2752471
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OpenGL vertex array objects with tinyobjloader

In order to use modern openGl with tinyobjloader, I'm trying to change the viewer exemple. I just change the LoadObjAndConvert function, to add vertex array objects as i seen in this tutorial, and to no longer use the buffer object that contains all…
Leon
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Cannot properly convert OBJ or OpenGL doesn't draw the object well

I spent hours trying to draw my .obj models in OpenGL. I figured that probably there is something wrong with my Python script (that converts obj models to C++ files). Or there is something wrong with .obj file. I don't know how to make it working…
Deloryn
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Using VBO to draw the cube by loading wavefront object

I am required to Using VBO to draw the cube by loading wavefront object. by drawing the triangles. here is the object: v -1.000000 -1.000000 1.000000 v -1.000000 1.000000 1.000000 v -1.000000 -1.000000 -1.000000 v -1.000000 1.000000 -1.000000 v…
ShaoyuPei
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Is there a ruby parser for IFC ISO-10303-21 files (STEP-files)?

I'm looking for a STEP file parser for ruby that will spit out OBJ files or a model structure similar to OBJ files. I also have found a make your own parser gem here but not quite sure how to properly set up the parser / lexer rules to use it.
Babbz77
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I'm trying to render a model using vbo in OpenGL (LWJGL)

I am trying to render a model by importing the .obj File. Im successfully importing and preparing the data to be rendered in FloatBuffers/IntegerBuffers but cant manage to render it. Can someone help me? This is the class that renders and…
N. J. Funk
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C++ obj loader texture coordinates messed up

I have written a simple obj parser in c++ that loads the vertices, indices and texture coordinates (that's all the data I need). Here is the function: Model* ModelLoader::loadFromOBJ(string objFile, ShaderProgram *shader, GLuint texture) { …
456panos
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Calculate indices from a vector of vec3 objects by finding duplicate vertices

I am trying to build an .obj file importer that renders said model to the screen. At present I have imported the vertices and they are stored in a std::vector vertices; My renderer class quite large so I'll link github instead of posting it…
user5930979
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OBJ File: Why are there so many normal indices in comparison to normal values?

So I am reading obj files and make lists to store the vertices, texture vertices, normal, vertex texture and normal indices. Testing this with a cube results in 8 vertices and 6 normals but there are 24 items in the normal indices list. Can anyone…
Bluehand
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Problems with model texture coords opengl

I have a program I use for test-loading models into OpenGL in C. The code for this is pretty straightforward as far as model loading with Assimp goes (to my understanding): const struct aiScene* scene = aiImportFile(objfile,…
YourNameHere
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How to derive index buffer from .obj faces?

I'm struggling to figure out how to create an index buffer from Wavefront object files. I understand that faces may be comprised of an arbitrary number of vertices, such as: f 1 2 3 4 f 2 3 4 5 How do I recognize the proper way to construct…
Dino Bojadzievski
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