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#if !defined( lint ) && !defined( SABER )
static const char sccsid[] = "@(#)buildlwo.c 5.00 2000/11/01 xlockmore";
#endif
/*-
* buildlwo.c: Lightwave Object Display List Builder for OpenGL
*
* This module can be called by any GL mode wishing to use
* objects created in NewTek's Lightwave 3D. The objects must
* first be converted to C source with my converter "lw2ogl".
* If other people are interested in this, I will put up a
* web page for it at http://www.netaxs.com/~emackey/lw2ogl/
*
* Revision History:
* 01-Nov-2000: Allocation checks
* 19-Apr-1997: Written by Ed Mackey
*
*/
#ifndef STANDALONE
#include "xlock.h"
#endif
#ifdef USE_GL
#ifdef STANDALONE
#include <GL/glx.h>
#endif
#include <GL/gl.h>
#include "buildlwo.h"
GLuint
BuildLWO(int wireframe, struct lwo *object)
{
GLuint dl_num;
GLfloat *pnts, *normals, three[3], *grab;
unsigned short int *pols;
int p, num_pnts = 0;
if ((dl_num = glGenLists(1)) == 0)
return (0);
glNewList(dl_num, GL_COMPILE);
if (glGetError() != GL_NO_ERROR) {
glDeleteLists(dl_num, 1);
return (0);
}
pnts = object->pnts;
normals = object->normals;
pols = object->pols;
if (!pols) {
num_pnts = object->num_pnts;
glBegin(GL_POINTS);
for (p = 0; p < num_pnts; ++p) {
three[0] = *(pnts++);
three[1] = *(pnts++);
three[2] = *(pnts++);
glVertex3fv(three);
}
glEnd();
} else
for (;;) {
if (num_pnts <= 0) {
num_pnts = *pols + 2;
if (num_pnts < 3)
break;
if (num_pnts == 3) {
glBegin(GL_POINTS);
} else if (num_pnts == 4) {
glBegin(GL_LINES);
} else {
three[0] = *(normals++);
three[1] = *(normals++);
three[2] = *(normals++);
glNormal3fv(three);
if (wireframe)
glBegin(GL_LINE_LOOP);
else
glBegin(GL_POLYGON);
}
} else if (num_pnts == 1) {
glEnd();
} else {
grab = pnts + ((int) (*pols) * 3);
three[0] = *(grab++);
three[1] = *(grab++);
three[2] = *(grab++);
glVertex3fv(three);
}
--num_pnts;
++pols;
}
glEndList();
return (dl_num);
}
#endif /* USE_GL */
/* End of buildlwo.c */
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