Import OBJ Model - Negative Indexes - 29/04/2018 21:55 EDT




I'm looking for C++ programmers to help me develop CrackArt, an open source 3D painting and compositing application. I am in the process of updating CrackArt to a new user interface library (Qt) and display system (Vulkan), and I need a programmer to help me on a long time project, but managed by short and well-defined deliverables.

I'm a software engineer and each deliverable will be concrete, well defined and with clear completion criteria.

Current Milestone

- Finish OBJ import module.

Future Milestones

- Implement FBX import module.

- Implement glTF import module.


Current Deliverable Description (THIS PROJECT)


CrackArt imports 3D files in OBJ format. The current implementation is missing some OBJ features.

For this deliverable, I need the OBJ implementation to support negative index numbers.

[url removed, login to view]~dhouse/courses/405/docs/[url removed, login to view]

It is also possible to reference points using negative indices, where the indices are specified relative to the current maximum vertex position (-1 references the last vertex defined). This makes it easy to describe the points in a face, then the face, without the need to store a large list of points and their indexes. In this way, "v" commands and "f" commands can be interspersed.

v -0.500000 0.000000 0.400000

v -0.500000 0.000000 -0.800000

v -0.500000 1.000000 -0.800000

v -0.500000 1.000000 0.400000

f -4 -3 -2 -1

I am attaching to this project a zip file that contains:

How To Build CrackArt

An HTML document that describes how to build CrackArt.

OBJ Files - Working

A set of OBJ files that CrackArt can import and display correctly.

OBJ Files Negative Indexes

8 simple OBJ files with negative indexes that CrackArt fails to import.




Update the Obj Importer Exporter code to support OBJ negative indexes. The files that need to be modified are:

[url removed, login to view]

[url removed, login to view]

Most probably the method:

Status WavefrontObjImporter::LoadObjFile(std::string filename)


Completion Criteria


After this deliverable CrackArt must be able to import and display the models in the OBJ_Files/Negative_Indexes directory of the zip file. CrackArt should also be able to import and display the files in the OBJ_Files/Working directory, which are working with the current code.

Skills: C Programming, C# Programming, C++ Programming, Software Architecture, Unity 3D

See more: import 3d model, import obj texture vue, obj model simplify, import obj life, ruby rails import rss model, free obj model files, osgviewer obj model appears dark, obj model jogl viewer, import wing model, obj model file parser check, solidworks model negative, low poly obj model free, warhammer 40k obj model, import obj vue, import life model

About the Employer:
( 0 reviews ) Burnaby, Canada

Project ID: #16828439

Awarded to:


I have already finished the task, if you wish I can send you my patch which modify only Obj.h and ObjImport.cpp.

$45 CAD in 0 days
(0 Reviews)

4 freelancers are bidding on average $52 for this job


I worked with .obj since yearts ago... I know how to work with negative indices... I said 7 days because I can start on 4th May. Best regards!

$111 CAD in 7 days
(119 Reviews)

Hi. I have review your project description. I have full experiences in Development. I am very interested in your project and also ready to start work immediately. Hoping for your soon Reply. Thank You Regard.

$25 CAD in 1 day
(9 Reviews)

Hi !! Nice to E-meet you We have a team of experienced python, django developers. We have developed a sophisticated trading platform using python, django, postgresql. Our python/django developers also has experience in More

$25 CAD in 1 day
(1 Review)