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