Hi, all.
I have tried to understand the entire thread, but I got lost in some moment. I have spent several months trying to find the way to accomplish some tasks in a project, without success, and I think you may have the solution.
Well, my project consists of a 3D scene where it's displayed a robot arm. It has been represented using the 3D Picture Control. Every mechanical part of the robot is a VRML model (they're not simple geometries) that has been loaded and placed defining relationships between them, and I can control their relative movements with some controls placed on the control panel window.
The representation with the 3D Picture Control has been fairly easy and satisfactory, but now I need to add several advanced capabilities, such as collision detection (between the robot itself, with other objects and with the ground). Since the 3D Picture Control doesn't have these functions, I began to learn OpenGL.
I have found several problems:
1. I'm trying to execute a C program with OpenGL in LabView. I compile it into a dll and use the Call Library Function Node. I have also replaced the glutMainLoop of GLUT for glutMainLoopEvent of freeGLUT, following your instructions (at first, I only want LabView to enter the program, run one cycle program, and return to LabView diagram). But I found that LabView goes wrong when trying to run the program (well, more exactly, the first time I run, it goes OK; but the second, LabView crashes and closes itself).
2. Is it worth learning OpenGL or should I learn OpenSG since there are high level libraries based on it that detect collisions? More precisely, I've found on the internet a library, called CollDet, that seems to perform these calculations.
CollDet website:
http://cg.in.tu-clausthal.de/research/colldet/index.shtml
I paste here the code of the OpenGL program:
#include "stdafx.h"
#include <freeglut.h>
extern "C" __declspec(dllexport)int MyFunction();
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0,1.0,1.0);
glBegin(GL_POLYGON);
glVertex3f(0.25,0.25,0.0);
glVertex3f(0.75,0.25,0.0);
glVertex3f(0.75,0.75,0.0);
glVertex3f(0.25,0.75,0.0);
glEnd();
glFlush();
}
void init(void)
{
glClearColor(0.0,0.0,0.0,0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0,1.0,0.0,1.0,-1.0,1.0);
}
void MyOpenGL()
{
int argc = 1;
char* argv[1] = {{""}};
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(250,250);
glutInitWindowPosition(700,100);
glutCreateWindow("My Window");
init();
glutDisplayFunc(display);
glutMainLoopEvent();
}
int MyFunction()
{
MyOpenGL();
return 0;
}
Well, I hope you can help me.
Thanks in advance,
Francisco
