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/* Copyright (c) 1994 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* Parse an MGF file, converting or discarding unsupported entities |
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*/ |
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|
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#include <stdio.h> |
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#include <math.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include "parser.h" |
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#include "lookup.h" |
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#include "messages.h" |
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|
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/* |
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* Global definitions of variables declared in parser.h |
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*/ |
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/* entity names */ |
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|
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char mg_ename[MG_NENTITIES][MG_MAXELEN] = MG_NAMELIST; |
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|
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/* Handler routines for each entity */ |
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|
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int (*mg_ehand[MG_NENTITIES])(); |
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|
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/* error messages */ |
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|
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char *mg_err[MG_NERRS] = MG_ERRLIST; |
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|
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MG_FCTXT *mg_file; /* current file context pointer */ |
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|
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int mg_nqcdivs = MG_NQCD; /* number of divisions per quarter circle */ |
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|
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/* |
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* The idea with this parser is to compensate for any missing entries in |
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* mg_ehand with alternate handlers that express these entities in terms |
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* of others that the calling program can handle. |
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* |
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* In some cases, no alternate handler is possible because the entity |
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* has no approximate equivalent. These entities are simply discarded. |
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* |
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* Certain entities are dependent on others, and mg_init() will fail |
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* if the supported entities are not consistent. |
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* |
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* Some alternate entity handlers require that earlier entities be |
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* noted in some fashion, and we therefore keep another array of |
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* parallel support handlers to assist in this effort. |
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*/ |
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|
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/* temporary settings for testing */ |
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#define e_ies e_any_toss |
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/* alternate handler routines */ |
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|
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static int e_any_toss(), /* discard unneeded entity */ |
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e_ies(), /* IES luminaire file */ |
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e_include(), /* include file */ |
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e_sph(), /* sphere */ |
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e_cct(), /* color temperature */ |
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e_cmix(), /* color mixtures */ |
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e_cspec(), /* color spectra */ |
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e_cyl(), /* cylinder */ |
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e_cone(), /* cone */ |
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e_prism(), /* prism */ |
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e_ring(), /* ring */ |
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e_torus(); /* torus */ |
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|
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/* alternate handler support functions */ |
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|
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static int (*e_supp[MG_NENTITIES])(); |
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|
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static char FLTFMT[] = "%.12g"; |
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|
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static int warpconends; /* hack for generating good normals */ |
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|
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|
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void |
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mg_init() /* initialize alternate entity handlers */ |
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{ |
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unsigned long ineed = 0, uneed = 0; |
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register int i; |
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/* pick up slack */ |
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if (mg_ehand[MG_E_IES] == NULL) |
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mg_ehand[MG_E_IES] = e_ies; |
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if (mg_ehand[MG_E_INCLUDE] == NULL) |
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mg_ehand[MG_E_INCLUDE] = e_include; |
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if (mg_ehand[MG_E_SPH] == NULL) { |
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mg_ehand[MG_E_SPH] = e_sph; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_CYL] == NULL) { |
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mg_ehand[MG_E_CYL] = e_cyl; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_CONE] == NULL) { |
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mg_ehand[MG_E_CONE] = e_cone; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_RING] == NULL) { |
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mg_ehand[MG_E_RING] = e_ring; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_PRISM] == NULL) { |
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mg_ehand[MG_E_PRISM] = e_prism; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_TORUS] == NULL) { |
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mg_ehand[MG_E_TORUS] = e_torus; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_COLOR] != NULL) { |
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if (mg_ehand[MG_E_CMIX] == NULL) { |
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mg_ehand[MG_E_CMIX] = e_cmix; |
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ineed |= 1<<MG_E_COLOR|1<<MG_E_CXY|1<<MG_E_CSPEC|1<<MG_E_CMIX|1<<MG_E_CCT; |
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} |
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if (mg_ehand[MG_E_CSPEC] == NULL) { |
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mg_ehand[MG_E_CSPEC] = e_cspec; |
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ineed |= 1<<MG_E_COLOR|1<<MG_E_CXY|1<<MG_E_CSPEC|1<<MG_E_CMIX|1<<MG_E_CCT; |
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} |
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if (mg_ehand[MG_E_CCT] == NULL) { |
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mg_ehand[MG_E_CCT] = e_cct; |
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ineed |= 1<<MG_E_COLOR|1<<MG_E_CXY|1<<MG_E_CSPEC|1<<MG_E_CMIX|1<<MG_E_CCT; |
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} |
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} |
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/* check for consistency */ |
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if (mg_ehand[MG_E_FACE] != NULL) |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_CXY] != NULL || mg_ehand[MG_E_CSPEC] != NULL || |
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mg_ehand[MG_E_CMIX] != NULL) |
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uneed |= 1<<MG_E_COLOR; |
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if (mg_ehand[MG_E_RD] != NULL || mg_ehand[MG_E_TD] != NULL || |
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mg_ehand[MG_E_IR] != NULL || |
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mg_ehand[MG_E_ED] != NULL || |
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mg_ehand[MG_E_RS] != NULL || |
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mg_ehand[MG_E_TS] != NULL || |
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mg_ehand[MG_E_SIDES] != NULL) |
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uneed |= 1<<MG_E_MATERIAL; |
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for (i = 0; i < MG_NENTITIES; i++) |
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if (uneed & 1<<i && mg_ehand[i] == NULL) { |
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fprintf(stderr, "Missing support for \"%s\" entity\n", |
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mg_ename[i]); |
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exit(1); |
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} |
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/* add support as needed */ |
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if (ineed & 1<<MG_E_VERTEX && mg_ehand[MG_E_VERTEX] != c_hvertex) |
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e_supp[MG_E_VERTEX] = c_hvertex; |
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if (ineed & 1<<MG_E_POINT && mg_ehand[MG_E_POINT] != c_hvertex) |
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e_supp[MG_E_POINT] = c_hvertex; |
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if (ineed & 1<<MG_E_NORMAL && mg_ehand[MG_E_NORMAL] != c_hvertex) |
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e_supp[MG_E_NORMAL] = c_hvertex; |
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if (ineed & 1<<MG_E_COLOR && mg_ehand[MG_E_COLOR] != c_hcolor) |
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e_supp[MG_E_COLOR] = c_hcolor; |
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if (ineed & 1<<MG_E_CXY && mg_ehand[MG_E_CXY] != c_hcolor) |
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e_supp[MG_E_CXY] = c_hcolor; |
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if (ineed & 1<<MG_E_CSPEC && mg_ehand[MG_E_CSPEC] != c_hcolor) |
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e_supp[MG_E_CSPEC] = c_hcolor; |
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if (ineed & 1<<MG_E_CMIX && mg_ehand[MG_E_CMIX] != c_hcolor) |
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e_supp[MG_E_CMIX] = c_hcolor; |
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if (ineed & 1<<MG_E_CCT && mg_ehand[MG_E_CCT] != c_hcolor) |
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e_supp[MG_E_CCT] = c_hcolor; |
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/* discard remaining entities */ |
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for (i = 0; i < MG_NENTITIES; i++) |
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if (mg_ehand[i] == NULL) |
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mg_ehand[i] = e_any_toss; |
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} |
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|
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|
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int |
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mg_entity(name) /* get entity number from its name */ |
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char *name; |
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{ |
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static LUTAB ent_tab = LU_SINIT(NULL,NULL); /* lookup table */ |
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register char *cp; |
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|
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if (!ent_tab.tsiz) { /* initialize hash table */ |
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if (!lu_init(&ent_tab, MG_NENTITIES)) |
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return(-1); /* what to do? */ |
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for (cp = mg_ename[MG_NENTITIES-1]; cp >= mg_ename[0]; |
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cp -= sizeof(mg_ename[0])) |
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lu_find(&ent_tab, cp)->key = cp; |
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} |
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cp = lu_find(&ent_tab, name)->key; |
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if (cp == NULL) |
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return(-1); |
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return((cp - mg_ename[0])/sizeof(mg_ename[0])); |
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} |
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|
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|
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int |
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mg_handle(en, ac, av) /* pass entity to appropriate handler */ |
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register int en; |
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int ac; |
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char **av; |
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{ |
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int rv; |
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|
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if (en < 0 && (en = mg_entity(av[0])) < 0) |
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return(MG_EUNK); |
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if (e_supp[en] != NULL) { |
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if ((rv = (*e_supp[en])(ac, av)) != MG_OK) |
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return(rv); |
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} |
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return((*mg_ehand[en])(ac, av)); |
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} |
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|
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|
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int |
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mg_open(ctx, fn) /* open new input file */ |
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register MG_FCTXT *ctx; |
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char *fn; |
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{ |
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static int nfids; |
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int olen; |
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register char *cp; |
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|
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ctx->fid = ++nfids; |
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ctx->lineno = 0; |
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if (fn == NULL) { |
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strcpy(ctx->fname, "<stdin>"); |
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ctx->fp = stdin; |
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ctx->prev = mg_file; |
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mg_file = ctx; |
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return(MG_OK); |
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} |
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/* get name relative to this context */ |
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if (mg_file != NULL && |
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(cp = strrchr(mg_file->fname, '/')) != NULL) |
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olen = cp - mg_file->fname + 1; |
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else |
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olen = 0; |
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if (olen) |
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strcpy(ctx->fname, mg_file->fname); |
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strcpy(ctx->fname+olen, fn); |
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ctx->fp = fopen(ctx->fname, "r"); |
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if (ctx->fp == NULL) |
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return(MG_ENOFILE); |
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ctx->prev = mg_file; /* establish new context */ |
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mg_file = ctx; |
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return(MG_OK); |
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} |
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|
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|
252 |
void |
253 |
mg_close() /* close input file */ |
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{ |
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register MG_FCTXT *ctx = mg_file; |
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|
257 |
mg_file = ctx->prev; /* restore enclosing context */ |
258 |
if (ctx->fp == stdin) |
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return; /* don't close standard input */ |
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fclose(ctx->fp); |
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} |
262 |
|
263 |
|
264 |
void |
265 |
mg_fgetpos(pos) /* get current position in input file */ |
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register MG_FPOS *pos; |
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{ |
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extern long ftell(); |
269 |
|
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pos->fid = mg_file->fid; |
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pos->lineno = mg_file->lineno; |
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pos->offset = ftell(mg_file->fp); |
273 |
} |
274 |
|
275 |
|
276 |
int |
277 |
mg_fgoto(pos) /* reposition input file pointer */ |
278 |
register MG_FPOS *pos; |
279 |
{ |
280 |
if (pos->fid != mg_file->fid) |
281 |
return(MG_ESEEK); |
282 |
if (pos->lineno == mg_file->lineno) |
283 |
return(MG_OK); |
284 |
if (mg_file->fp == stdin) |
285 |
return(MG_ESEEK); /* cannot seek on standard input */ |
286 |
if (fseek(mg_file->fp, pos->offset, 0) == EOF) |
287 |
return(MG_ESEEK); |
288 |
mg_file->lineno = pos->lineno; |
289 |
return(MG_OK); |
290 |
} |
291 |
|
292 |
|
293 |
int |
294 |
mg_read() /* read next line from file */ |
295 |
{ |
296 |
register int len = 0; |
297 |
|
298 |
do { |
299 |
if (fgets(mg_file->inpline+len, |
300 |
MG_MAXLINE-len, mg_file->fp) == NULL) |
301 |
return(len); |
302 |
mg_file->lineno++; |
303 |
len += strlen(mg_file->inpline+len); |
304 |
if (len > 1 && mg_file->inpline[len-2] == '\\') |
305 |
mg_file->inpline[--len-1] = ' '; |
306 |
} while (mg_file->inpline[len]); |
307 |
|
308 |
return(len); |
309 |
} |
310 |
|
311 |
|
312 |
int |
313 |
mg_parse() /* parse current input line */ |
314 |
{ |
315 |
char abuf[MG_MAXLINE]; |
316 |
char *argv[MG_MAXARGC]; |
317 |
int en; |
318 |
register char *cp, **ap; |
319 |
|
320 |
strcpy(cp=abuf, mg_file->inpline); |
321 |
ap = argv; /* break into words */ |
322 |
for ( ; ; ) { |
323 |
while (isspace(*cp)) |
324 |
*cp++ = '\0'; |
325 |
if (!*cp) |
326 |
break; |
327 |
if (ap - argv >= MG_MAXARGC-1) |
328 |
return(MG_EARGC); |
329 |
*ap++ = cp; |
330 |
while (*++cp && !isspace(*cp)) |
331 |
; |
332 |
} |
333 |
if (ap == argv) |
334 |
return(MG_OK); /* no words in line */ |
335 |
*ap = NULL; |
336 |
/* else handle it */ |
337 |
return(mg_handle(-1, ap-argv, argv)); |
338 |
} |
339 |
|
340 |
|
341 |
int |
342 |
mg_load(fn) /* load an MGF file */ |
343 |
char *fn; |
344 |
{ |
345 |
MG_FCTXT cntxt; |
346 |
int rval; |
347 |
|
348 |
if ((rval = mg_open(&cntxt, fn)) != MG_OK) { |
349 |
fprintf(stderr, "%s: %s\n", fn, mg_err[rval]); |
350 |
return(rval); |
351 |
} |
352 |
while (mg_read()) /* parse each line */ |
353 |
if ((rval = mg_parse()) != MG_OK) { |
354 |
fprintf(stderr, "%s: %d: %s:\n%s", cntxt.fname, |
355 |
cntxt.lineno, mg_err[rval], |
356 |
cntxt.inpline); |
357 |
break; |
358 |
} |
359 |
mg_close(); |
360 |
return(rval); |
361 |
} |
362 |
|
363 |
|
364 |
void |
365 |
mg_clear() /* clear parser history */ |
366 |
{ |
367 |
c_clearall(); /* clear context tables */ |
368 |
mg_file = NULL; /* reset our context */ |
369 |
} |
370 |
|
371 |
|
372 |
/**************************************************************************** |
373 |
* The following routines handle unsupported entities |
374 |
*/ |
375 |
|
376 |
|
377 |
static int |
378 |
e_any_toss(ac, av) /* discard an unwanted entity */ |
379 |
int ac; |
380 |
char **av; |
381 |
{ |
382 |
return(MG_OK); |
383 |
} |
384 |
|
385 |
|
386 |
static int |
387 |
e_include(ac, av) /* include file */ |
388 |
int ac; |
389 |
char **av; |
390 |
{ |
391 |
char *xfarg[MG_MAXARGC]; |
392 |
MG_FCTXT ictx; |
393 |
int rv; |
394 |
|
395 |
if (ac < 2) |
396 |
return(MG_EARGC); |
397 |
if ((rv = mg_open(&ictx, av[1])) != MG_OK) |
398 |
return(rv); |
399 |
if (ac > 2) { |
400 |
register int i; |
401 |
|
402 |
xfarg[0] = mg_ename[MG_E_XF]; |
403 |
for (i = 1; i < ac-1; i++) |
404 |
xfarg[i] = av[i+1]; |
405 |
xfarg[ac-1] = NULL; |
406 |
if ((rv = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) |
407 |
return(rv); |
408 |
} |
409 |
while (!feof(mg_file->fp)) { |
410 |
while (mg_read()) |
411 |
if ((rv = mg_parse()) != MG_OK) { |
412 |
fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname, |
413 |
ictx.lineno, mg_err[rv], |
414 |
ictx.inpline); |
415 |
mg_close(); |
416 |
return(MG_EINCL); |
417 |
} |
418 |
if (ac > 2) |
419 |
if ((rv = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) |
420 |
return(rv); |
421 |
} |
422 |
mg_close(); |
423 |
return(MG_OK); |
424 |
} |
425 |
|
426 |
|
427 |
static void |
428 |
make_axes(u, v, w) /* compute u and v given w (normalized) */ |
429 |
FVECT u, v, w; |
430 |
{ |
431 |
register int i; |
432 |
|
433 |
v[0] = v[1] = v[2] = 0.; |
434 |
for (i = 0; i < 3; i++) |
435 |
if (w[i] < .6 && w[i] > -.6) |
436 |
break; |
437 |
v[i] = 1.; |
438 |
fcross(u, v, w); |
439 |
normalize(u); |
440 |
fcross(v, w, u); |
441 |
} |
442 |
|
443 |
|
444 |
static int |
445 |
e_sph(ac, av) /* expand a sphere into cones */ |
446 |
int ac; |
447 |
char **av; |
448 |
{ |
449 |
static char p2x[24], p2y[24], p2z[24], r1[24], r2[24]; |
450 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_sv1","=","_sv2"}; |
451 |
static char *v2ent[4] = {mg_ename[MG_E_VERTEX],"_sv2","="}; |
452 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2x,p2y,p2z}; |
453 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_sv1",r1,"_sv2",r2}; |
454 |
register C_VERTEX *cv; |
455 |
register int i; |
456 |
int rval; |
457 |
double rad; |
458 |
double theta; |
459 |
|
460 |
if (ac != 3) |
461 |
return(MG_EARGC); |
462 |
if ((cv = c_getvert(av[1])) == NULL) |
463 |
return(MG_EUNDEF); |
464 |
if (!isflt(av[2])) |
465 |
return(MG_ETYPE); |
466 |
rad = atof(av[2]); |
467 |
/* initialize */ |
468 |
warpconends = 1; |
469 |
if ((rval = mg_handle(MG_E_VERTEX, 3, v2ent)) != MG_OK) |
470 |
return(rval); |
471 |
sprintf(p2x, FLTFMT, cv->p[0]); |
472 |
sprintf(p2y, FLTFMT, cv->p[1]); |
473 |
sprintf(p2z, FLTFMT, cv->p[2]+rad); |
474 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
475 |
return(rval); |
476 |
r2[0] = '0'; r2[1] = '\0'; |
477 |
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
478 |
theta = i*(PI/2)/mg_nqcdivs; |
479 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
480 |
return(rval); |
481 |
sprintf(p2z, FLTFMT, cv->p[2]+rad*cos(theta)); |
482 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
483 |
return(rval); |
484 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
485 |
return(rval); |
486 |
strcpy(r1, r2); |
487 |
sprintf(r2, FLTFMT, rad*sin(theta)); |
488 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
489 |
return(rval); |
490 |
} |
491 |
warpconends = 0; |
492 |
return(MG_OK); |
493 |
} |
494 |
|
495 |
|
496 |
static int |
497 |
e_torus(ac, av) /* expand a torus into cones */ |
498 |
int ac; |
499 |
char **av; |
500 |
{ |
501 |
static char p2[3][24], r1[24], r2[24]; |
502 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_tv1","=","_tv2"}; |
503 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_tv2","="}; |
504 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2[0],p2[1],p2[2]}; |
505 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_tv1",r1,"_tv2",r2}; |
506 |
register C_VERTEX *cv; |
507 |
register int i, j; |
508 |
int rval; |
509 |
int sgn; |
510 |
double minrad, maxrad, avgrad; |
511 |
double theta; |
512 |
|
513 |
if (ac != 4) |
514 |
return(MG_EARGC); |
515 |
if ((cv = c_getvert(av[1])) == NULL) |
516 |
return(MG_EUNDEF); |
517 |
if (is0vect(cv->n)) |
518 |
return(MG_EILL); |
519 |
if (!isflt(av[2]) || !isflt(av[3])) |
520 |
return(MG_ETYPE); |
521 |
minrad = atof(av[2]); |
522 |
round0(minrad); |
523 |
maxrad = atof(av[3]); |
524 |
/* check orientation */ |
525 |
if (minrad > 0.) |
526 |
sgn = 1; |
527 |
else if (minrad < 0.) |
528 |
sgn = -1; |
529 |
else if (maxrad > 0.) |
530 |
sgn = 1; |
531 |
else if (maxrad < 0.) |
532 |
sgn = -1; |
533 |
else |
534 |
return(MG_EILL); |
535 |
if (sgn*(maxrad-minrad) <= 0.) |
536 |
return(MG_EILL); |
537 |
/* initialize */ |
538 |
warpconends = 1; |
539 |
v2ent[3] = av[1]; |
540 |
for (j = 0; j < 3; j++) |
541 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
542 |
.5*sgn*(maxrad-minrad)*cv->n[j]); |
543 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
544 |
return(rval); |
545 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
546 |
return(rval); |
547 |
sprintf(r2, FLTFMT, avgrad=.5*(minrad+maxrad)); |
548 |
/* run outer section */ |
549 |
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
550 |
theta = i*(PI/2)/mg_nqcdivs; |
551 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
552 |
return(rval); |
553 |
for (j = 0; j < 3; j++) |
554 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
555 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
556 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
557 |
return(rval); |
558 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
559 |
return(rval); |
560 |
strcpy(r1, r2); |
561 |
sprintf(r2, FLTFMT, avgrad + .5*(maxrad-minrad)*sin(theta)); |
562 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
563 |
return(rval); |
564 |
} |
565 |
/* run inner section */ |
566 |
sprintf(r2, FLTFMT, -.5*(minrad+maxrad)); |
567 |
for ( ; i <= 4*mg_nqcdivs; i++) { |
568 |
theta = i*(PI/2)/mg_nqcdivs; |
569 |
for (j = 0; j < 3; j++) |
570 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
571 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
572 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
573 |
return(rval); |
574 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
575 |
return(rval); |
576 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
577 |
return(rval); |
578 |
strcpy(r1, r2); |
579 |
sprintf(r2, FLTFMT, -avgrad - .5*(maxrad-minrad)*sin(theta)); |
580 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
581 |
return(rval); |
582 |
} |
583 |
warpconends = 0; |
584 |
return(MG_OK); |
585 |
} |
586 |
|
587 |
|
588 |
static int |
589 |
e_cyl(ac, av) /* replace a cylinder with equivalent cone */ |
590 |
int ac; |
591 |
char **av; |
592 |
{ |
593 |
static char *avnew[6] = {mg_ename[MG_E_CONE]}; |
594 |
|
595 |
if (ac != 4) |
596 |
return(MG_EARGC); |
597 |
avnew[1] = av[1]; |
598 |
avnew[2] = av[2]; |
599 |
avnew[3] = av[3]; |
600 |
avnew[4] = av[2]; |
601 |
return(mg_handle(MG_E_CONE, 5, avnew)); |
602 |
} |
603 |
|
604 |
|
605 |
static int |
606 |
e_ring(ac, av) /* turn a ring into polygons */ |
607 |
int ac; |
608 |
char **av; |
609 |
{ |
610 |
static char p3[3][24], p4[3][24]; |
611 |
static char *nzent[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
612 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_rv1","="}; |
613 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_rv2","=","_rv3"}; |
614 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_rv3","="}; |
615 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
616 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_rv4","="}; |
617 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
618 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_rv1","_rv2","_rv3","_rv4"}; |
619 |
register C_VERTEX *cv; |
620 |
register int i, j; |
621 |
FVECT u, v; |
622 |
double minrad, maxrad; |
623 |
int rv; |
624 |
double theta, d; |
625 |
|
626 |
if (ac != 4) |
627 |
return(MG_EARGC); |
628 |
if ((cv = c_getvert(av[1])) == NULL) |
629 |
return(MG_EUNDEF); |
630 |
if (is0vect(cv->n)) |
631 |
return(MG_EILL); |
632 |
if (!isflt(av[2]) || !isflt(av[3])) |
633 |
return(MG_ETYPE); |
634 |
minrad = atof(av[2]); |
635 |
round0(minrad); |
636 |
maxrad = atof(av[3]); |
637 |
if (minrad < 0. || maxrad <= minrad) |
638 |
return(MG_EILL); |
639 |
/* initialize */ |
640 |
make_axes(u, v, cv->n); |
641 |
for (j = 0; j < 3; j++) |
642 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*u[j]); |
643 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
644 |
return(rv); |
645 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
646 |
return(rv); |
647 |
if (minrad == 0.) { /* closed */ |
648 |
v1ent[3] = av[1]; |
649 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
650 |
return(rv); |
651 |
if ((rv = mg_handle(MG_E_NORMAL, 4, nzent)) != MG_OK) |
652 |
return(rv); |
653 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
654 |
theta = i*(PI/2)/mg_nqcdivs; |
655 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
656 |
return(rv); |
657 |
for (j = 0; j < 3; j++) |
658 |
sprintf(p3[j], FLTFMT, cv->p[j] + |
659 |
maxrad*u[j]*cos(theta) + |
660 |
maxrad*v[j]*sin(theta)); |
661 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
662 |
return(rv); |
663 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
664 |
return(rv); |
665 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK) |
666 |
return(rv); |
667 |
} |
668 |
} else { /* open */ |
669 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
670 |
return(rv); |
671 |
for (j = 0; j < 3; j++) |
672 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*u[j]); |
673 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
674 |
return(rv); |
675 |
v1ent[3] = "_rv4"; |
676 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
677 |
theta = i*(PI/2)/mg_nqcdivs; |
678 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
679 |
return(rv); |
680 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
681 |
return(rv); |
682 |
for (j = 0; j < 3; j++) { |
683 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
684 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*d); |
685 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*d); |
686 |
} |
687 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
688 |
return(rv); |
689 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
690 |
return(rv); |
691 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
692 |
return(rv); |
693 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
694 |
return(rv); |
695 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK) |
696 |
return(rv); |
697 |
} |
698 |
} |
699 |
return(MG_OK); |
700 |
} |
701 |
|
702 |
|
703 |
static int |
704 |
e_cone(ac, av) /* turn a cone into polygons */ |
705 |
int ac; |
706 |
char **av; |
707 |
{ |
708 |
static char p3[3][24], p4[3][24], n3[3][24], n4[3][24]; |
709 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_cv1","="}; |
710 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_cv2","=","_cv3"}; |
711 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_cv3","="}; |
712 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
713 |
static char *n3ent[5] = {mg_ename[MG_E_NORMAL],n3[0],n3[1],n3[2]}; |
714 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_cv4","="}; |
715 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
716 |
static char *n4ent[5] = {mg_ename[MG_E_NORMAL],n4[0],n4[1],n4[2]}; |
717 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_cv1","_cv2","_cv3","_cv4"}; |
718 |
register C_VERTEX *cv1, *cv2; |
719 |
register int i, j; |
720 |
FVECT u, v, w; |
721 |
double rad1, rad2; |
722 |
int sgn; |
723 |
double n1off, n2off; |
724 |
double d; |
725 |
int rv; |
726 |
double theta; |
727 |
|
728 |
if (ac != 5) |
729 |
return(MG_EARGC); |
730 |
if ((cv1 = c_getvert(av[1])) == NULL || |
731 |
(cv2 = c_getvert(av[3])) == NULL) |
732 |
return(MG_EUNDEF); |
733 |
if (!isflt(av[2]) || !isflt(av[4])) |
734 |
return(MG_ETYPE); |
735 |
rad1 = atof(av[2]); |
736 |
round0(rad1); |
737 |
rad2 = atof(av[4]); |
738 |
round0(rad2); |
739 |
if (rad1 == 0.) { |
740 |
if (rad2 == 0.) |
741 |
return(MG_EILL); |
742 |
} else if (rad2 != 0.) { |
743 |
if (rad1 < 0. ^ rad2 < 0.) |
744 |
return(MG_EILL); |
745 |
} else { /* swap */ |
746 |
C_VERTEX *cv; |
747 |
|
748 |
cv = cv1; |
749 |
cv1 = cv2; |
750 |
cv2 = cv; |
751 |
d = rad1; |
752 |
rad1 = rad2; |
753 |
rad2 = d; |
754 |
} |
755 |
sgn = rad2 < 0. ? -1 : 1; |
756 |
/* initialize */ |
757 |
for (j = 0; j < 3; j++) |
758 |
w[j] = cv1->p[j] - cv2->p[j]; |
759 |
if ((d = normalize(w)) == 0.) |
760 |
return(MG_EILL); |
761 |
n1off = n2off = (rad2 - rad1)/d; |
762 |
if (warpconends) { /* hack for e_sph and e_torus */ |
763 |
d = atan(n2off) - (PI/4)/mg_nqcdivs; |
764 |
if (d <= -PI/2+FTINY) |
765 |
n2off = -FHUGE; |
766 |
else |
767 |
n2off = tan(d); |
768 |
} |
769 |
make_axes(u, v, w); |
770 |
for (j = 0; j < 3; j++) { |
771 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*u[j]); |
772 |
if (n2off <= -FHUGE) |
773 |
sprintf(n3[j], FLTFMT, -w[j]); |
774 |
else |
775 |
sprintf(n3[j], FLTFMT, u[j] + w[j]*n2off); |
776 |
} |
777 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
778 |
return(rv); |
779 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
780 |
return(rv); |
781 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
782 |
return(rv); |
783 |
if (rad1 == 0.) { /* triangles */ |
784 |
v1ent[3] = av[1]; |
785 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
786 |
return(rv); |
787 |
for (j = 0; j < 3; j++) |
788 |
sprintf(n4[j], FLTFMT, w[j]); |
789 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
790 |
return(rv); |
791 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
792 |
theta = sgn*i*(PI/2)/mg_nqcdivs; |
793 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
794 |
return(rv); |
795 |
for (j = 0; j < 3; j++) { |
796 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
797 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
798 |
if (n2off > -FHUGE) |
799 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
800 |
} |
801 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
802 |
return(rv); |
803 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
804 |
return(rv); |
805 |
if (n2off > -FHUGE && |
806 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
807 |
return(rv); |
808 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK) |
809 |
return(rv); |
810 |
} |
811 |
} else { /* quads */ |
812 |
v1ent[3] = "_cv4"; |
813 |
if (warpconends) { /* hack for e_sph and e_torus */ |
814 |
d = atan(n1off) + (PI/4)/mg_nqcdivs; |
815 |
if (d >= PI/2-FTINY) |
816 |
n1off = FHUGE; |
817 |
else |
818 |
n1off = tan(atan(n1off)+(PI/4)/mg_nqcdivs); |
819 |
} |
820 |
for (j = 0; j < 3; j++) { |
821 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*u[j]); |
822 |
if (n1off >= FHUGE) |
823 |
sprintf(n4[j], FLTFMT, w[j]); |
824 |
else |
825 |
sprintf(n4[j], FLTFMT, u[j] + w[j]*n1off); |
826 |
} |
827 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
828 |
return(rv); |
829 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
830 |
return(rv); |
831 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
832 |
return(rv); |
833 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
834 |
theta = sgn*i*(PI/2)/mg_nqcdivs; |
835 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
836 |
return(rv); |
837 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
838 |
return(rv); |
839 |
for (j = 0; j < 3; j++) { |
840 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
841 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
842 |
if (n2off > -FHUGE) |
843 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
844 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*d); |
845 |
if (n1off < FHUGE) |
846 |
sprintf(n4[j], FLTFMT, d + w[j]*n1off); |
847 |
} |
848 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
849 |
return(rv); |
850 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
851 |
return(rv); |
852 |
if (n2off > -FHUGE && |
853 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
854 |
return(rv); |
855 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
856 |
return(rv); |
857 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
858 |
return(rv); |
859 |
if (n1off < FHUGE && |
860 |
(rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
861 |
return(rv); |
862 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK) |
863 |
return(rv); |
864 |
} |
865 |
} |
866 |
return(MG_OK); |
867 |
} |
868 |
|
869 |
|
870 |
static int |
871 |
e_prism(ac, av) /* turn a prism into polygons */ |
872 |
int ac; |
873 |
char **av; |
874 |
{ |
875 |
static char p[3][24]; |
876 |
static char *vent[5] = {mg_ename[MG_E_VERTEX],NULL,"="}; |
877 |
static char *pent[5] = {mg_ename[MG_E_POINT],p[0],p[1],p[2]}; |
878 |
static char *znorm[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
879 |
char *newav[MG_MAXARGC], nvn[MG_MAXARGC-1][8]; |
880 |
double length; |
881 |
int hasnorm; |
882 |
FVECT v1, v2, v3, norm; |
883 |
register C_VERTEX *cv; |
884 |
C_VERTEX *cv0; |
885 |
int rv; |
886 |
register int i, j; |
887 |
/* check arguments */ |
888 |
if (ac < 5) |
889 |
return(MG_EARGC); |
890 |
if (!isflt(av[ac-1])) |
891 |
return(MG_ETYPE); |
892 |
length = atof(av[ac-1]); |
893 |
if (length <= FTINY && length >= -FTINY) |
894 |
return(MG_EILL); |
895 |
/* compute face normal */ |
896 |
if ((cv0 = c_getvert(av[1])) == NULL) |
897 |
return(MG_EUNDEF); |
898 |
hasnorm = 0; |
899 |
norm[0] = norm[1] = norm[2] = 0.; |
900 |
v1[0] = v1[1] = v1[2] = 0.; |
901 |
for (i = 2; i < ac-1; i++) { |
902 |
if ((cv = c_getvert(av[i])) == NULL) |
903 |
return(MG_EUNDEF); |
904 |
hasnorm += !is0vect(cv->n); |
905 |
v2[0] = cv->p[0] - cv0->p[0]; |
906 |
v2[1] = cv->p[1] - cv0->p[1]; |
907 |
v2[2] = cv->p[2] - cv0->p[2]; |
908 |
fcross(v3, v1, v2); |
909 |
norm[0] += v3[0]; |
910 |
norm[1] += v3[1]; |
911 |
norm[2] += v3[2]; |
912 |
VCOPY(v1, v2); |
913 |
} |
914 |
if (normalize(norm) == 0.) |
915 |
return(MG_EILL); |
916 |
/* create moved vertices */ |
917 |
for (i = 1; i < ac-1; i++) { |
918 |
sprintf(nvn[i-1], "_pv%d", i); |
919 |
vent[1] = nvn[i-1]; |
920 |
vent[3] = av[i]; |
921 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK) |
922 |
return(rv); |
923 |
cv = c_getvert(av[i]); /* checked above */ |
924 |
for (j = 0; j < 3; j++) |
925 |
sprintf(p[j], FLTFMT, cv->p[j] - length*norm[j]); |
926 |
if ((rv = mg_handle(MG_E_POINT, 4, pent)) != MG_OK) |
927 |
return(rv); |
928 |
} |
929 |
/* make faces */ |
930 |
newav[0] = mg_ename[MG_E_FACE]; |
931 |
/* do the side faces */ |
932 |
newav[5] = NULL; |
933 |
newav[3] = av[ac-2]; |
934 |
newav[4] = nvn[ac-3]; |
935 |
for (i = 1; i < ac-1; i++) { |
936 |
newav[1] = nvn[i-1]; |
937 |
newav[2] = av[i]; |
938 |
if ((rv = mg_handle(MG_E_FACE, 5, newav)) != MG_OK) |
939 |
return(rv); |
940 |
newav[3] = newav[2]; |
941 |
newav[4] = newav[1]; |
942 |
} |
943 |
/* do top face */ |
944 |
for (i = 1; i < ac-1; i++) { |
945 |
if (hasnorm) { /* zero normals */ |
946 |
vent[1] = nvn[i-1]; |
947 |
if ((rv = mg_handle(MG_E_VERTEX, 2, vent)) != MG_OK) |
948 |
return(rv); |
949 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK) |
950 |
return(rv); |
951 |
} |
952 |
newav[ac-1-i] = nvn[i-1]; /* reverse */ |
953 |
} |
954 |
if ((rv = mg_handle(MG_E_FACE, ac-1, newav)) != MG_OK) |
955 |
return(rv); |
956 |
/* do bottom face */ |
957 |
if (hasnorm) |
958 |
for (i = 1; i < ac-1; i++) { |
959 |
vent[1] = nvn[i-1]; |
960 |
vent[3] = av[i]; |
961 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK) |
962 |
return(rv); |
963 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK) |
964 |
return(rv); |
965 |
newav[i] = nvn[i-1]; |
966 |
} |
967 |
else |
968 |
for (i = 1; i < ac-1; i++) |
969 |
newav[i] = av[i]; |
970 |
newav[i] = NULL; |
971 |
if ((rv = mg_handle(MG_E_FACE, i, newav)) != MG_OK) |
972 |
return(rv); |
973 |
return(MG_OK); |
974 |
} |
975 |
|
976 |
|
977 |
static int |
978 |
put_cxy() /* put out current xy chromaticities */ |
979 |
{ |
980 |
static char xbuf[24], ybuf[24]; |
981 |
static char *ccom[4] = {mg_ename[MG_E_CXY], xbuf, ybuf}; |
982 |
int rv; |
983 |
|
984 |
sprintf(xbuf, "%.4f", c_ccolor->cx); |
985 |
sprintf(ybuf, "%.4f", c_ccolor->cy); |
986 |
if ((rv = mg_handle(MG_E_CXY, 3, ccom)) != MG_OK) |
987 |
return(rv); |
988 |
return(MG_OK); |
989 |
} |
990 |
|
991 |
|
992 |
static int |
993 |
put_cspec() /* put out current color spectrum */ |
994 |
{ |
995 |
char wl[2][6], vbuf[C_CNSS][24]; |
996 |
char *newav[C_CNSS+4]; |
997 |
double sf; |
998 |
register int i; |
999 |
|
1000 |
if (mg_ehand[MG_E_CSPEC] != c_hcolor) { |
1001 |
sprintf(wl[0], "%d", C_CMINWL); |
1002 |
sprintf(wl[1], "%d", C_CMAXWL); |
1003 |
newav[0] = mg_ename[MG_E_CSPEC]; |
1004 |
newav[1] = wl[0]; |
1005 |
newav[2] = wl[1]; |
1006 |
sf = (double)C_CNSS / c_ccolor->ssum; |
1007 |
for (i = 0; i < C_CNSS; i++) { |
1008 |
sprintf(vbuf[i], "%.4f", sf*c_ccolor->ssamp[i]); |
1009 |
newav[i+3] = vbuf[i]; |
1010 |
} |
1011 |
newav[C_CNSS+3] = NULL; |
1012 |
if ((i = mg_handle(MG_E_CSPEC, C_CNSS+3, newav)) != MG_OK) |
1013 |
return(i); |
1014 |
} |
1015 |
return(MG_OK); |
1016 |
} |
1017 |
|
1018 |
|
1019 |
static int |
1020 |
e_cspec(ac, av) /* handle spectral color */ |
1021 |
int ac; |
1022 |
char **av; |
1023 |
{ |
1024 |
/* convert to xy chromaticity */ |
1025 |
c_ccvt(c_ccolor, C_CSXY); |
1026 |
/* if it's really their handler, use it */ |
1027 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1028 |
return(put_cxy()); |
1029 |
return(MG_OK); |
1030 |
} |
1031 |
|
1032 |
|
1033 |
static int |
1034 |
e_cmix(ac, av) /* handle mixing of colors */ |
1035 |
int ac; |
1036 |
char **av; |
1037 |
{ |
1038 |
/* |
1039 |
* Contorted logic works as follows: |
1040 |
* 1. the colors are already mixed in c_hcolor() support function |
1041 |
* 2. if we would handle a spectral result, make sure it's not |
1042 |
* 3. if c_hcolor() would handle a spectral result, don't bother |
1043 |
* 4. otherwise, make cspec entity and pass it to their handler |
1044 |
* 5. if we have only xy results, handle it as c_spec() would |
1045 |
*/ |
1046 |
if (mg_ehand[MG_E_CSPEC] == e_cspec) |
1047 |
c_ccvt(c_ccolor, C_CSXY); |
1048 |
else if (c_ccolor->flags & C_CDSPEC) |
1049 |
return(put_cspec()); |
1050 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1051 |
return(put_cxy()); |
1052 |
return(MG_OK); |
1053 |
} |
1054 |
|
1055 |
|
1056 |
static int |
1057 |
e_cct(ac, av) /* handle color temperature */ |
1058 |
int ac; |
1059 |
char **av; |
1060 |
{ |
1061 |
/* |
1062 |
* Logic is similar to e_cmix here. Support handler has already |
1063 |
* converted temperature to spectral color. Put it out as such |
1064 |
* if they support it, otherwise convert to xy chromaticity and |
1065 |
* put it out if they handle it. |
1066 |
*/ |
1067 |
if (mg_ehand[MG_E_CSPEC] != e_cspec) |
1068 |
return(put_cspec()); |
1069 |
c_ccvt(c_ccolor, C_CSXY); |
1070 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1071 |
return(put_cxy()); |
1072 |
return(MG_OK); |
1073 |
} |