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OpenGl - shape from a file

Started by melol Jan 27, 2012 at 10:21 AM 0 replies 1.9k views

Original Post

Jan 27, 2012 at 10:21 AM

Hello!
I've got a problem with loading a shape from a file.
Beginning of the file (which is 5MB) is as follows:


 v
 from 0.1 0.1 0.25
 at -0.01 0.085 0.02
 up 0 1 0
 angle 50
 hither 1
 resolution 1024 1024
 b 0.0 0.0 0.0
 l 0.4 0.3 0.2 0.25 0.25 0.25
 f 0.753 0.753 0.753 1 0 0 0 1
 p 3
 -0.092314 0.132364 0.018222
 -0.092180 0.132348 0.017224
 -0.092767 0.130992 0.017231
 p 3
 -0.087168 0.110390 0.018362
 -0.088961 0.111861 0.018336
 -0.087443 0.110454 0.017341
 p 3
 -0.087840 0.105023 0.014367
 -0.087237 0.106355 0.014359
 -0.087251 0.106353 0.013364

I don't have any idea how to load it in OpenGL project or even what keywords to google.
So far I have a OpenGL project, with a teapot rendered thanks to glutWireTeapot()
Does anyone know if I could in a simple way comment in my code the glutWireTeapot(), an write instead a function which loads my shape form file.

I will appreciate your help very much!

Ruggostein

Jan 27, 2012 at 11:44 AM

Yes, just learn how to draw a triangle in openGL, and write a function to do it, using glBegin glEnd etc, it is easy.
Parsing your fle should be easy too, you should be familiar with the file format, looking at it it seems that each p 3 means a polygon with 3 sides, followed by a list of 3 vertices positions. Possibly the format allows for n-sides polygons, in that case write a function that can draw a polygon with a variable number of sides.

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