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- /*
- * Tubing and Extrusion header file.
- * This file provides protypes and defines for the extrusion
- * and tubing primitives.
- *
- * Linas Vepstas 1991
- */
-
- #ifndef __TUBE_H__
- #define __TUBE_H__
-
- /* 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
-
-
- #ifdef GL_32
- /* HACK for GL 3.2 -- needed because no way to tell if lighting is on. */
- #define TUBE_LIGHTING_ON 0x80000000
- #endif /* GL_32 */
-
- /* append identifying prefix for OpenGL version */
- #if (defined OPENGL_10 || defined DEBUG_OPENGL_10)
-
- #define extrusion gleExtrusion
- #define setjoinstyle gleSetJoinStyle
- #define getjoinstyle gleGetJoinStyle
- #define polycone glePolyCone
- #define polycylinder glePolyCylinder
- #define super_extrusion gleSuperExtrusion
- #define twist_extrusion gleTwistExtrusion
- #define spiral gleSpiral
- #define lathe gleLathe
- #define helicoid gleHelicoid
-
- #endif /* OPENGL_10 */
-
-
- #ifdef _NO_PROTO /* NO ANSI C PROTOTYPING */
-
- extern int getjoinstyle ();
- extern void setjoinstyle ();
- extern void polycone ();
- extern void polycylinder ();
- extern void extrusion ();
- extern void super_extrusion ();
- extern void twist_extrusion ();
- extern void spiral ();
- extern void lathe ();
- extern void helicoid ();
-
- #else /* _NO_PROTO */ /* ANSI C PROTOTYPING */
-
- extern int getjoinstyle (void);
- extern void setjoinstyle (int style); /* bitwise OR of flags */
-
- /* draw polyclinder, specified as a polyline */
- extern void polycylinder (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 polycone (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 extrusion (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 twist_extrusion (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 super_extrusion (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 spiral (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 lathe (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 helicoid (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 */
-
- #endif /*_NO_PROTO*/
-
- #endif /*__TUBE_H__*/
- /* ================== END OF FILE ======================= */
-