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/*
* tube.h
*
* FUNCTION:
* Tubing and Extrusion header file.
* This file provides protypes and defines for the extrusion
* and tubing primitives.
*
* HISTORY:
* Linas Vepstas 1990, 1991
*/
#ifndef __TUBE_H__
#define __TUBE_H__
#ifdef __cplusplus
extern "C" {
#endif
/**
GLE API revision history:
GLE_API_VERSION is updated to reflect GLE API changes (interface
changes, semantic changes, deletions, or additions).
GLE_API_VERSION=228 GLUT 3.7 release of GLE.
**/
#ifndef GLE_API_VERSION /* allow this to be overriden */
#define GLE_API_VERSION 228
#endif
/* some types */
#define gleDouble double
typedef gleDouble gleAffine[2][3];
/* ====================================================== */
/* defines for tubing join styles */
#define TUBE_JN_RAW 0x1
#define TUBE_JN_ANGLE 0x2
#define TUBE_JN_CUT 0x3
#define TUBE_JN_ROUND 0x4
#define TUBE_JN_MASK 0xf /* mask bits */
#define TUBE_JN_CAP 0x10
/* determine how normal vectors are to be handled */
#define TUBE_NORM_FACET 0x100
#define TUBE_NORM_EDGE 0x200
#define TUBE_NORM_PATH_EDGE 0x400 /* for spiral, lathe, helix primitives */
#define TUBE_NORM_MASK 0xf00 /* mask bits */
/* closed or open countours */
#define TUBE_CONTOUR_CLOSED 0x1000
#define GLE_TEXTURE_ENABLE 0x10000
#define GLE_TEXTURE_STYLE_MASK 0xff
#define GLE_TEXTURE_VERTEX_FLAT 1
#define GLE_TEXTURE_NORMAL_FLAT 2
#define GLE_TEXTURE_VERTEX_CYL 3
#define GLE_TEXTURE_NORMAL_CYL 4
#define GLE_TEXTURE_VERTEX_SPH 5
#define GLE_TEXTURE_NORMAL_SPH 6
#define GLE_TEXTURE_VERTEX_MODEL_FLAT 7
#define GLE_TEXTURE_NORMAL_MODEL_FLAT 8
#define GLE_TEXTURE_VERTEX_MODEL_CYL 9
#define GLE_TEXTURE_NORMAL_MODEL_CYL 10
#define GLE_TEXTURE_VERTEX_MODEL_SPH 11
#define GLE_TEXTURE_NORMAL_MODEL_SPH 12
#ifdef GL_32
/* HACK for GL 3.2 -- needed because no way to tell if lighting is on. */
#define TUBE_LIGHTING_ON 0x80000000
#define gleExtrusion extrusion
#define gleSetJoinStyle setjoinstyle
#define gleGetJoinStyle getjoinstyle
#define glePolyCone polycone
#define glePolyCylinder polycylinder
#define gleSuperExtrusion super_extrusion
#define gleTwistExtrusion twist_extrusion
#define gleSpiral spiral
#define gleLathe lathe
#define gleHelicoid helicoid
#define gleToroid toroid
#define gleScrew screw
#endif /* GL_32 */
extern int gleGetJoinStyle (void);
extern void gleSetJoinStyle (int style); /* bitwise OR of flags */
extern int gleGetNumSlices(void);
extern void gleSetNumSlices(int slices);
/* draw polyclinder, specified as a polyline */
extern void glePolyCylinder (int npoints, /* num points in polyline */
gleDouble point_array[][3], /* polyline vertces */
float color_array[][3], /* colors at polyline verts */
gleDouble radius); /* radius of polycylinder */
/* draw polycone, specified as a polyline with radii */
extern void glePolyCone (int npoints, /* numpoints in poly-line */
gleDouble point_array[][3], /* polyline vertices */
float color_array[][3], /* colors at polyline verts */
gleDouble radius_array[]); /* cone radii at polyline verts */
/* extrude arbitrary 2D contour along arbitrary 3D path */
extern void gleExtrusion (int ncp, /* number of contour points */
gleDouble contour[][2], /* 2D contour */
gleDouble cont_normal[][2], /* 2D contour normals */
gleDouble up[3], /* up vector for contour */
int npoints, /* numpoints in poly-line */
gleDouble point_array[][3], /* polyline vertices */
float color_array[][3]); /* colors at polyline verts */
/* extrude 2D contour, specifying local rotations (twists) */
extern void gleTwistExtrusion (int ncp, /* number of contour points */
gleDouble contour[][2], /* 2D contour */
gleDouble cont_normal[][2], /* 2D contour normals */
gleDouble up[3], /* up vector for contour */
int npoints, /* numpoints in poly-line */
gleDouble point_array[][3], /* polyline vertices */
float color_array[][3], /* color at polyline verts */
gleDouble twist_array[]); /* countour twists (in degrees) */
/* extrude 2D contour, specifying local affine tranformations */
extern void gleSuperExtrusion (int ncp, /* number of contour points */
gleDouble contour[][2], /* 2D contour */
gleDouble cont_normal[][2], /* 2D contour normals */
gleDouble up[3], /* up vector for contour */
int npoints, /* numpoints in poly-line */
gleDouble point_array[][3], /* polyline vertices */
float color_array[][3], /* color at polyline verts */
gleDouble xform_array[][2][3]); /* 2D contour xforms */
/* spiral moves contour along helical path by parallel transport */
extern void gleSpiral (int ncp, /* number of contour points */
gleDouble contour[][2], /* 2D contour */
gleDouble cont_normal[][2], /* 2D contour normals */
gleDouble up[3], /* up vector for contour */
gleDouble startRadius, /* spiral starts in x-y plane */
gleDouble drdTheta, /* change in radius per revolution */
gleDouble startZ, /* starting z value */
gleDouble dzdTheta, /* change in Z per revolution */
gleDouble startXform[2][3], /* starting contour affine xform */
gleDouble dXformdTheta[2][3], /* tangent change xform per revoln */
gleDouble startTheta, /* start angle in x-y plane */
gleDouble sweepTheta); /* degrees to spiral around */
/* lathe moves contour along helical path by helically shearing 3D space */
extern void gleLathe (int ncp, /* number of contour points */
gleDouble contour[][2], /* 2D contour */
gleDouble cont_normal[][2], /* 2D contour normals */
gleDouble up[3], /* up vector for contour */
gleDouble startRadius, /* spiral starts in x-y plane */
gleDouble drdTheta, /* change in radius per revolution */
gleDouble startZ, /* starting z value */
gleDouble dzdTheta, /* change in Z per revolution */
gleDouble startXform[2][3], /* starting contour affine xform */
gleDouble dXformdTheta[2][3], /* tangent change xform per revoln */
gleDouble startTheta, /* start angle in x-y plane */
gleDouble sweepTheta); /* degrees to spiral around */
/* similar to spiral, except contour is a circle */
extern void gleHelicoid (gleDouble rToroid, /* circle contour (torus) radius */
gleDouble startRadius, /* spiral starts in x-y plane */
gleDouble drdTheta, /* change in radius per revolution */
gleDouble startZ, /* starting z value */
gleDouble dzdTheta, /* change in Z per revolution */
gleDouble startXform[2][3], /* starting contour affine xform */
gleDouble dXformdTheta[2][3], /* tangent change xform per revoln */
gleDouble startTheta, /* start angle in x-y plane */
gleDouble sweepTheta); /* degrees to spiral around */
/* similar to lathe, except contour is a circle */
extern void gleToroid (gleDouble rToroid, /* circle contour (torus) radius */
gleDouble startRadius, /* spiral starts in x-y plane */
gleDouble drdTheta, /* change in radius per revolution */
gleDouble startZ, /* starting z value */
gleDouble dzdTheta, /* change in Z per revolution */
gleDouble startXform[2][3], /* starting contour affine xform */
gleDouble dXformdTheta[2][3], /* tangent change xform per revoln */
gleDouble startTheta, /* start angle in x-y plane */
gleDouble sweepTheta); /* degrees to spiral around */
/* draws a screw shape */
extern void gleScrew (int ncp, /* number of contour points */
gleDouble contour[][2], /* 2D contour */
gleDouble cont_normal[][2], /* 2D contour normals */
gleDouble up[3], /* up vector for contour */
gleDouble startz, /* start of segment */
gleDouble endz, /* end of segment */
gleDouble twist); /* number of rotations */
extern void gleTextureMode (int mode);
#ifdef __cplusplus
}
#endif
#endif /* __TUBE_H__ */
/* ================== END OF FILE ======================= */
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