#include "common.h"#include <stddef.h>#include <stdio.h>#include <strings.h>#include <math.h>#include "machine.h"#include "vmath.h"#include "db.h"#include "nmg.h"#include "raytrace.h"#include "rtgeom.h"#include "./debug.h"#include "noalias.h"Include dependency graph for g_torus.c:
Go to the source code of this file.
Data Structures | |
| struct | tor_specific |
Defines | |
| #define | SEG_MISS(SEG) (SEG).seg_stp=(struct soltab *) 0; |
| #define | TOR_PT(www, lll) ((((www)%nw)*nlen)+((lll)%nlen)) |
| #define | TOR_PTA(ww, ll) (&pts[TOR_PT(ww,ll)*3]) |
| #define | TOR_NORM_A(ww, ll) (&norms[TOR_PT(ww,ll)*3]) |
Functions | |
| int | rt_tor_prep (struct soltab *stp, struct rt_db_internal *ip, struct rt_i *rtip) |
| void | rt_tor_print (register const struct soltab *stp) |
| int | rt_tor_shot (struct soltab *stp, register struct xray *rp, struct application *ap, struct seg *seghead) |
| void | rt_tor_vshot (struct soltab **stp, struct xray **rp, struct seg *segp, int n, struct application *ap) |
| void | rt_tor_norm (register struct hit *hitp, struct soltab *stp, register struct xray *rp) |
| void | rt_tor_curve (register struct curvature *cvp, register struct hit *hitp, struct soltab *stp) |
| void | rt_tor_uv (struct application *ap, struct soltab *stp, register struct hit *hitp, register struct uvcoord *uvp) |
| void | rt_tor_free (struct soltab *stp) |
| int | rt_tor_class (void) |
| int | rt_num_circular_segments (double maxerr, double radius) |
| int | rt_tor_plot (struct bu_list *vhead, struct rt_db_internal *ip, const struct rt_tess_tol *ttol, const struct bn_tol *tol) |
| int | rt_tor_tess (struct nmgregion **r, struct model *m, struct rt_db_internal *ip, const struct rt_tess_tol *ttol, const struct bn_tol *tol) |
| int | rt_tor_import (struct rt_db_internal *ip, const struct bu_external *ep, register const fastf_t *mat, const struct db_i *dbip) |
| int | rt_tor_export5 (struct bu_external *ep, const struct rt_db_internal *ip, double local2mm, const struct db_i *dbip) |
| int | rt_tor_export (struct bu_external *ep, const struct rt_db_internal *ip, double local2mm, const struct db_i *dbip) |
| int | rt_tor_import5 (struct rt_db_internal *ip, const struct bu_external *ep, register const fastf_t *mat, const struct db_i *dbip) |
| int | rt_tor_describe (struct bu_vls *str, const struct rt_db_internal *ip, int verbose, double mm2local) |
| void | rt_tor_ifree (struct rt_db_internal *ip) |
Variables | |
| const struct bu_structparse | rt_tor_parse [] |
Authors - Edwin O. Davisson (Analysis) Jeff Hanes (Programming) Michael John Muuss (RT adaptation) Gary S. Moss (Improvement)
Source - SECAD/VLD Computing Consortium, Bldg 394 The U. S. Army Ballistic Research Laboratory Aberdeen Proving Ground, Maryland 21005
Definition in file g_torus.c.
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Referenced by rt_tor_plot(), and rt_tor_tess(). |
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Referenced by rt_tor_tess(). |
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R T _ T O R _ P R I N T Definition at line 310 of file g_torus.c. References bn_mat_print(), bu_log(), tor_specific::tor_alpha, tor_specific::tor_invR, tor_specific::tor_N, tor_specific::tor_r1, tor_specific::tor_r2, tor_specific::tor_SoR, tor_specific::tor_V, and VPRINT. Here is the call graph for this function:  |
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R T _ T O R _ S H O T Intersect a ray with an torus, where all constant terms have been precomputed by rt_tor_prep(). If an intersection occurs, one or two struct seg(s) will be acquired and filled in. NOTE: All lines in this function are represented parametrically by a point, P( x0, y0, z0 ) and a direction normal, D = ax + by + cz. Any point on a line can be expressed by one variable 't', where X = a*t + x0, eg, X = Dx*t + Px Y = b*t + y0, Z = c*t + z0. First, convert the line to the coordinate system of a "stan- dard" torus. This is a torus which lies in the X-Y plane, circles the origin, and whose primary radius is one. The secondary radius is alpha = ( R2/R1 ) of the original torus where ( 0 < alpha <= 1 ). Then find the equation of that line and the standard torus, which turns out to be a quartic equation in 't'. Solve the equation using a general polynomial root finder. Use those values of 't' to compute the points of intersection in the original coordinate system. Returns - 0 MISS >0 HIT Definition at line 357 of file g_torus.c. References A, application::a_rt_i, bn_pr_roots(), bu_log(), directory::d_namep, bn_tol::dist, LOCAL, MAT4X3VEC, NEAR_ZERO, rt_poly_roots(), rt_i::rti_tol, soltab::st_dp, soltab::st_specific, tor_specific::tor_alpha, tor_specific::tor_SoR, tor_specific::tor_V, val, VDOT, VPRINT, VSCALE, VSUB2, VUNITIZE, X, Y, and Z. Here is the call graph for this function:  |
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Definition at line 553 of file g_torus.c. References A, bu_malloc(), LOCAL, MAT4X3VEC, xray::r_dir, tor_specific::tor_alpha, tor_specific::tor_SoR, tor_specific::tor_V, val, VDOT, VMOVE, VSCALE, VSUB2, VUNITIZE, X, Y, and Z. Here is the call graph for this function:  |
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R T _ T O R _ N O R M Compute the normal to the torus, given a point on the UNIT TORUS centered at the origin on the X-Y plane. The gradient of the torus at that point is in fact the normal vector, which will have to be given unit length. To make this useful for the original torus, it will have to be rotated back to the orientation of the original torus. Given that the equation for the unit torus is: [ X**2 + Y**2 + Z**2 + (1 - alpha**2) ]**2 - 4*( X**2 + Y**2 ) = 0 let w = X**2 + Y**2 + Z**2 + (1 - alpha**2), then the equation becomes: w**2 - 4*( X**2 + Y**2 ) = 0 For f(x,y,z) = 0, the gradient of f() is ( df/dx, df/dy, df/dz ). df/dx = 2 * w * 2 * x - 8 * x = (4 * w - 8) * x df/dy = 2 * w * 2 * y - 8 * y = (4 * w - 8) * y df/dz = 2 * w * 2 * z = 4 * w * z Since we rescale the gradient (normal) to unity, we divide the above equations by four here. Definition at line 844 of file g_torus.c. References FAST, LOCAL, MAT3X3VEC, soltab::st_specific, tor_specific::tor_alpha, tor_specific::tor_invR, VJOIN1, VSET, VUNITIZE, X, Y, and Z. |
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R T _ T O R _ C U R V E Return the curvature of the torus. Definition at line 871 of file g_torus.c. References NEAR_ZERO, soltab::st_specific, tor_specific::tor_N, tor_specific::tor_V, VSUB2, X, Y, and Z. |
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R T _ T O R _ U V Definition at line 916 of file g_torus.c. References bn_inv2pi, LOCAL, MAT4X3VEC, tor_specific::tor_SoR, tor_specific::tor_V, VDOT, VSET, VSUB2, VUNITIZE, X, Y, and Z. |
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R T _ T O R _ F R E E Definition at line 944 of file g_torus.c. References bu_free(), and soltab::st_specific. Here is the call graph for this function:  |
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R T _ T O R _ P L O T The TORUS has the following input fields: ti.v V from origin to center ti.h Radius Vector, Normal to plane of torus ti.a,ti.b perpindicular, to CENTER of torus (for top, bottom) Definition at line 1024 of file g_torus.c. References rt_tor_internal::a, rt_tess_tol::abs, rt_tor_internal::b, bn_pi, bn_twopi, bu_malloc(), rt_tor_internal::h, rt_db_internal::idb_ptr, rt_tess_tol::norm, rt_tor_internal::r_a, rt_tor_internal::r_h, rt_tess_tol::rel, RT_CK_DB_INTERNAL, rt_num_circular_segments(), RT_TOR_CK_MAGIC, TOR_PTA, rt_tor_internal::v, VADD3, VCOMB2, and VSCALE. Here is the call graph for this function:  |
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R T _ T O R _ T E S S Definition at line 1139 of file g_torus.c. References rt_tor_internal::a, rt_tess_tol::abs, rt_tor_internal::b, bn_pi, bn_twopi, bu_malloc(), rt_tor_internal::h, rt_db_internal::idb_ptr, rt_tess_tol::norm, rt_tor_internal::r_a, rt_tor_internal::r_h, rt_tess_tol::rel, RT_CK_DB_INTERNAL, rt_num_circular_segments(), RT_TOR_CK_MAGIC, TOR_NORM_A, TOR_PTA, rt_tor_internal::v, VADD3, VCOMB2, VMOVE, VSCALE, and VUNITIZE. Here is the call graph for this function:  |
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R T _ T O R _ I M P O R T Import a torus from the database format to the internal format. Apply modeling transformations at the same time. Definition at line 1319 of file g_torus.c. References rt_tor_internal::a, rt_tor_internal::b, BU_CK_EXTERNAL, bu_log(), bu_malloc(), DB5_MAJORTYPE_BRLCAD, bu_external::ext_buf, rt_tor_internal::h, ID_SOLID, ID_TOR, rt_db_internal::idb_major_type, rt_db_internal::idb_meth, rt_db_internal::idb_ptr, LOCAL, rt_tor_internal::magic, MAGNITUDE, MAT4X3PNT, MAT4X3VEC, rt_tor_internal::r_a, rt_tor_internal::r_b, rt_tor_internal::r_h, RT_CK_DB_INTERNAL, rt_fastf_float(), RT_TOR_INTERNAL_MAGIC, record::s, record::solidrec::s_values, SMALL, record::u_id, rt_tor_internal::v, VCROSS, VDOT, VREVERSE, and VSCALE. Here is the call graph for this function:  |
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R T _ T O R _ E X P O R T 5 Definition at line 1378 of file g_torus.c. References BU_CK_EXTERNAL, bu_malloc(), bu_external::ext_buf, bu_external::ext_nbytes, rt_tor_internal::h, htond(), ID_TOR, rt_db_internal::idb_ptr, rt_tor_internal::r_a, rt_tor_internal::r_h, RT_CK_DB_INTERNAL, RT_TOR_CK_MAGIC, SIZEOF_NETWORK_DOUBLE, rt_tor_internal::v, VMOVE, and VSCALE. Here is the call graph for this function:  |
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R T _ T O R _ E X P O R T The name will be added by the caller. Definition at line 1409 of file g_torus.c. References bn_vec_ortho(), bu_calloc(), BU_CK_EXTERNAL, bu_log(), bu_external::ext_buf, bu_external::ext_nbytes, rt_tor_internal::h, ID_SOLID, ID_TOR, rt_db_internal::idb_ptr, MAGNITUDE, rt_tor_internal::r_a, rt_tor_internal::r_h, RT_CK_DB_INTERNAL, RT_TOR_CK_MAGIC, record::s, record::solidrec::s_id, record::solidrec::s_type, record::solidrec::s_values, SQRT_SMALL_FASTF, TOR, rt_tor_internal::v, VCROSS, VMOVE, VSCALE, and VUNITIZE. Here is the call graph for this function:  |
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R T _ T O R _ I M P O R T 5 Taken from the database record: v vertex (point) of center of torus. h unit vector in the normal direction of the torus major radius of ring from 'v' to center of ring minor radius of the ring Calculate: 2nd radius of ring (==1st radius) ring unit vector 1 ring unit vector 2 Definition at line 1503 of file g_torus.c. References rt_tor_internal::a, rt_tor_internal::b, bn_mat_is_non_unif(), bn_vec_ortho(), BU_ASSERT_LONG, BU_CK_EXTERNAL, bu_log(), bu_malloc(), DB5_MAJORTYPE_BRLCAD, bu_external::ext_buf, bu_external::ext_nbytes, rt_tor_internal::h, ID_TOR, rt_db_internal::idb_major_type, rt_db_internal::idb_meth, rt_db_internal::idb_ptr, LOCAL, rt_tor_internal::magic, MAT4X3PNT, MAT4X3VEC, ntohd(), rt_tor_internal::r_a, rt_tor_internal::r_b, rt_tor_internal::r_h, RT_CK_DB_INTERNAL, RT_TOR_INTERNAL_MAGIC, SIZEOF_NETWORK_DOUBLE, rt_tor_internal::v, VCROSS, VSCALE, and VUNITIZE. Here is the call graph for this function:  |
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R T _ T O R _ D E S C R I B E Make human-readable formatted presentation of this solid. First line describes type of solid. Additional lines are indented one tab, and give parameter values. Definition at line 1561 of file g_torus.c. References bu_vls_printf(), bu_vls_strcat(), rt_db_internal::idb_ptr, INTCLAMP, RT_TOR_CK_MAGIC, X, Y, and Z. Here is the call graph for this function:  |
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R T _ T O R _ I F R E E Free the storage associated with the rt_db_internal version of this solid. Definition at line 1615 of file g_torus.c. References bu_free(), GENPTR_NULL, rt_db_internal::idb_ptr, RT_CK_DB_INTERNAL, and RT_TOR_CK_MAGIC. Here is the call graph for this function:  |
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Initial value: {
{ "%f", 3, "V", bu_offsetof(struct rt_tor_internal, v[X]), BU_STRUCTPARSE_FUNC_NULL },
{ "%f", 3, "H", bu_offsetof(struct rt_tor_internal, h[X]), BU_STRUCTPARSE_FUNC_NULL },
{ "%f", 1, "r_a", bu_offsetof(struct rt_tor_internal, r_a), BU_STRUCTPARSE_FUNC_NULL },
{ "%f", 1, "r_h", bu_offsetof(struct rt_tor_internal, r_h), BU_STRUCTPARSE_FUNC_NULL },
{ {'\0','\0','\0','\0'}, 0, (char *)NULL, 0, BU_STRUCTPARSE_FUNC_NULL }
}
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1.4.6
