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/* $Id: glutils.h,v 1.13 2009/12/03 19:16:04 arif Exp $Revision: */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2007 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#ifndef GLUTILS_H
#define GLUTILS_H
#ifdef _WIN32
#include "windows.h"
#endif
#include <GL/gl.h>
#include <GL/glu.h>
#include "glcompdefs.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
float x, y, z;
} point3f;
typedef struct {
point3f u, v;
} line;
typedef struct {
point3f N; /* normal */
double d; /* offset */
} plane;
int GetFixedOGLPos(int, int, float, GLfloat *, GLfloat *, GLfloat * Z);
int GetOGLPosRef(int x, int y, float *X, float *Y, float *Z);
float GetOGLDistance(int l);
int GetFixedOGLPoslocal(int x, int y, GLfloat * X, GLfloat * Y,
GLfloat * Z);
void to3D(int x, int y, GLfloat * X, GLfloat * Y, GLfloat * Z);
void linear_interplotate(float, float, float, float, float, float *);
double point_to_line_dist(point3f p, point3f u, point3f v);
double point_to_lineseg_dist(point3f p, point3f a, point3f b);
int rot_spherex(plane J, float tet, point3f P, point3f * P2);
void make_plane(point3f a, point3f b, point3f c, plane * P);
void replacestr(char *source, char **target);
extern void glCompCalcWidget(glCompCommon * parent,
glCompCommon * child, glCompCommon * ref);
extern void glCompDrawRectangle(glCompRect * r);
extern void glCompDrawRectPrism(glCompPoint * p, GLfloat w, GLfloat h,
GLfloat b, GLfloat d, glCompColor * c,
int bumped);
extern void copy_glcomp_color(glCompColor * source,
glCompColor * target);
extern void glCompSetColor(glCompColor * c);
void glCompSelectionBox(glCompSet * s);
extern int lines_intersect (glCompPoint* a, glCompPoint* b, glCompPoint* c, glCompPoint* d);
#ifdef __cplusplus
}
#endif
#endif
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