/* $XConsortium: miNurbs.h,v 5.3 94/04/17 20:36:45 rws Exp $ */ /***************************************************************** Copyright (c) 1989,1990, 1991 X Consortium Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the X Consortium shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the X Consortium. Copyright (c) 1989,1990, 1991 by Sun Microsystems, Inc. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Sun Microsystems, and the X Consortium, not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ #ifndef MI_NURB_H #define MI_NURB_H 1 #ifdef NDEBUG extern unsigned nurb_debug_flags; #define NURB_DEBUG_FLAG(_b) (nurb_debug_flags & (_b)) #endif /* NDEBUG */ /* Nurb Debug Flags: * 0x01 (1) Surface edge paths * 0x02 (2) Surface iso curve paths * 0x04 (4) Trimming data, tessellated and ordered * 0x08 (8) Surface facet paths for untrimmed surfaces * 0x10 (16) Trimmed surface polygons * 0x20 (32) Surface facet paths * 0x40 (64) Surface polygons before trimming * 0x80 (128) Surface hollow-edge paths * 0x100 (256) Surface grids * 0x200 (512) Initial data */ #define MAXORD 10 #define MAXTCORD 6 #define XX 0 #define YY 1 #define ZZ 2 #define WW 3 #define MAX(a,b) ( ((a) > (b)) ? (a) : (b) ) extern double mi_nu_ptofd[MAXORD][MAXORD]; #define NURB_TRIM_DATA_INIT( _t ) \ { \ (_t).nloops = 0; \ (_t).loops = (Nurb_trim_loop_rep *)NULL; \ (_t).cur_vertex = 1; \ (_t).vertices = (Nurb_param_point *)NULL; \ (_t).ep_index = 0; \ (_t).ep_list_size = 0; \ (_t).ep_list = (Nurb_edge_point *)NULL; \ } #define NURB_SURF_STATE_INIT( _s ) \ { \ (_s)->reps.facets = 0; \ (_s)->reps.edges = 0; \ (_s)->reps.isocrvs = 0; \ (_s)->reps.markers = 0; \ (_s)->reps.hollow = 0; \ (_s)->reps.grids = 0; \ (_s)->reps.normals = 0; \ (_s)->reps.trim_data = 0; \ (_s)->grids.number = 0; \ (_s)->grids.flags.normals = 0; \ (_s)->grids.grids = (Nurb_grid *)NULL; \ (_s)->ruknots = (ddFLOAT *)NULL; \ (_s)->rvknots = (ddFLOAT *)NULL; \ (_s)->facets = (miListHeader *)NULL; \ (_s)->sofas = (miSOFASStruct *)NULL; \ (_s)->edges = (miListHeader *)NULL; \ (_s)->isocrvs = (miListHeader *)NULL; \ (_s)->markers = (miListHeader *)NULL; \ (_s)->hollow = (miListHeader *)NULL; \ NURB_TRIM_DATA_INIT((_s)->trim_data); \ } #define NURB_INIT_RANGE_LIST( _r ) \ (_r)->size = 0; \ (_r)->number = 0; \ (_r)->limits = (Nurb_limit *)NULL; #define EXTENTS_OVERLAP( _ea, _eb ) \ (!((_eb).umin > (_ea).umax || (_eb).umax < (_ea).umin || \ (_eb).vmin > (_ea).vmax || (_eb).vmax < (_ea).vmin)) #define GET_TRIM_CURVE_TOLERANCE( _crv, _tolerance ) \ switch ( (_crv)->curveApprox.approxMethod ) { \ case PEXApproxImpDep: \ case PEXApproxConstantBetweenKnots: \ (_tolerance) = (_crv)->curveApprox.tolerance; \ break; \ default: \ (_tolerance) = 1.0; \ } #define ADD_POINT_TO_LIST( _l, _r, _op, _pt ) \ if ((_l)) { \ listofddPoint *pddlist; \ if ( (_op) == PT_MOVE ) { \ (_l)->numLists++; \ MI_ALLOCLISTHEADER( (_l), \ MI_ROUND_LISTHEADERCOUNT( (_l)->numLists ) ); \ } \ pddlist = &((_l)->ddList[(_l)->numLists-1]); \ pddlist->numPoints++; \ if ( (_r) ) { \ MI_ALLOCLISTOFDDPOINT( pddlist, \ MI_ROUND_LISTHEADERCOUNT(pddlist->numPoints),\ sizeof(ddCoord4D) ); \ pddlist->pts.p4Dpt[pddlist->numPoints - 1] = *((ddCoord4D *)(_pt)); \ } else { \ MI_ALLOCLISTOFDDPOINT( pddlist, \ MI_ROUND_LISTHEADERCOUNT(pddlist->numPoints),\ sizeof(ddCoord3D) ); \ pddlist->pts.p3Dpt[pddlist->numPoints - 1] = *((ddCoord3D *)(_pt)); \ } \ } typedef enum { PT_NOP, PT_MOVE, PT_LINE, PT_MARKER } Nurb_path_op; typedef enum { NURB_SAME_CONTOUR = 0, NURB_NEW_CONTOUR = 1, NURB_NEW_FACET = 2 } Nurb_facet_op; typedef struct { unsigned facets: 1; unsigned isocrvs: 1; unsigned edges: 1; unsigned markers: 1; /* first order in u and v, use markers */ unsigned hollow: 1; unsigned grids: 1; unsigned normals: 1; unsigned trim_data: 1; } Nurb_rep_flags; typedef struct { double lmin; double lmax; } Nurb_limit; typedef struct { int size; int number; Nurb_limit *limits; } Nurb_limitlst; typedef struct { double u; double v; } Nurb_param_point; typedef struct { double umin, umax; double vmin, vmax; } Nurb_param_limit; typedef struct Nurb_trim_segment { int first, last; /* indices in vertex list */ int start, end; /* effective limit of seg */ int current; unsigned dir; ddULONG vis; Nurb_param_limit extent; /* of segment */ struct Nurb_trim_segment *next; } Nurb_trim_segment; typedef struct { Nurb_param_limit extent; /* of loop */ Nurb_trim_segment *segs; /* linked list of segments, NULL terminated */ } Nurb_trim_loop_rep; typedef struct { int flags; int count; /* of rectangles this point is part of */ double u, v; ddCoord4D pt; ddVector3D normal; int next, prev, branch; } Nurb_edge_point; typedef struct { Nurb_param_point *vertices; /* of tessellated curves */ int cur_vertex; /* index of current vertex */ int nloops; Nurb_trim_loop_rep *loops; /* array of representations */ Nurb_edge_point *ep_list; /* polygon edge points */ int ep_index; /* index of current one */ int ep_list_size; /* # allocated entries */ } Nurb_trim_data; typedef struct { Nurb_edge_point *pts; int nu, nv; Nurb_param_limit extent; } Nurb_grid; typedef struct { int number; struct { unsigned normals; } flags; Nurb_grid *grids; } Nurb_gridlst; typedef struct { int gitype; int isocount[2]; int approx_type; ddFLOAT approx_value[2]; Nurb_param_limit range; Nurb_param_limit param_limits; Nurb_rep_flags reps; ddFLOAT *ruknots; ddFLOAT *rvknots; Nurb_gridlst grids; Nurb_trim_data trim_data; Nurb_param_point corners[5]; Nurb_trim_segment edge_segs[4]; miListHeader *facets; miSOFASStruct *sofas; miListHeader *edges; miListHeader *isocrvs; miListHeader *markers; miListHeader *hollow; } Nurb_surf_state; #endif /* MI_NURB_H */