#include "common.h"#include <stdio.h>#include <math.h>#include "machine.h"#include "vmath.h"#include "raytrace.h"#include "rtgeom.h"#include "./debug.h"#include "noalias.h"Include dependency graph for g_sph.c:
Go to the source code of this file.
Data Structures | |
| struct | sph_specific |
Defines | |
| #define | SEG_MISS(SEG) (SEG).seg_stp=(struct soltab *) 0; |
Functions | |
| int | rt_sph_prep (struct soltab *stp, struct rt_db_internal *ip, struct rt_i *rtip) |
| void | rt_sph_print (register const struct soltab *stp) |
| int | rt_sph_shot (struct soltab *stp, register struct xray *rp, struct application *ap, struct seg *seghead) |
| void | rt_sph_vshot (struct soltab **stp, struct xray **rp, struct seg *segp, int n, struct application *ap) |
| void | rt_sph_norm (register struct hit *hitp, struct soltab *stp, register struct xray *rp) |
| void | rt_sph_curve (register struct curvature *cvp, register struct hit *hitp, struct soltab *stp) |
| void | rt_sph_uv (struct application *ap, struct soltab *stp, register struct hit *hitp, register struct uvcoord *uvp) |
| void | rt_sph_free (register struct soltab *stp) |
| int | rt_sph_class (void) |
Authors - Phillip Dykstra Dave Becker (Vectorization)
Source - SECAD/VLD Computing Consortium, Bldg 394 The U. S. Army Ballistic Research Laboratory Aberdeen Proving Ground, Maryland 21005
Definition in file g_sph.c.
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R T _ S P H _ P R I N T Definition at line 207 of file g_sph.c. References bn_mat_print(), bu_log(), sph_specific::sph_invrad, sph_specific::sph_rad, sph_specific::sph_radsq, sph_specific::sph_SoR, sph_specific::sph_V, and VPRINT. Here is the call graph for this function:  |
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R T _ S P H _ S H O T Intersect a ray with a sphere. If an intersection occurs, a struct seg will be acquired and filled in. Notes: In the quadratic equation, A is MAGSQ(r_dir) which is always equal to 1, so it does not appear. The sign of B is reversed (vector is reversed) to save negation. We have factored out the 2 and 4 constants. Claim: The straight quadratic formula leads to precision problems if either A or C are small. In our case A is always 1. C is a radial distance of the ray origin from the sphere surface. Thus if we are shooting from near the surface we may have problems. XXX - investigate this. Returns - 0 MISS >0 HIT Definition at line 240 of file g_sph.c. References application::a_resource, BU_LIST_INSERT, FAST, seg::l, LOCAL, MAGSQ, RT_GET_SEG, sph_specific::sph_radsq, sph_specific::sph_V, soltab::st_specific, VDOT, and VSUB2. |
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R T _ S P H _ V S H O T This is the Becker vectorized version Definition at line 287 of file g_sph.c. References FAST, hit::hit_dist, LOCAL, MAGSQ, xray::r_pt, seg::seg_in, SEG_MISS, seg::seg_out, seg::seg_stp, sph_specific::sph_radsq, sph_specific::sph_V, VDOT, and VSUB2. |
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R T _ S P H _ N O R M Given ONE ray distance, return the normal and entry/exit point. Definition at line 345 of file g_sph.c. References sph_specific::sph_invrad, sph_specific::sph_V, soltab::st_specific, VJOIN1, VSCALE, and VSUB2. |
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R T _ S P H _ C U R V E Return the curvature of the sphere. Definition at line 361 of file g_sph.c. References bn_vec_ortho(), sph_specific::sph_invrad, and soltab::st_specific. Here is the call graph for this function:  |
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R T _ S P H _ U V For a hit on the surface of an SPH, return the (u,v) coordinates of the hit point, 0 <= u,v <= 1. u = azimuth v = elevation Definition at line 381 of file g_sph.c. References application::a_diverge, application::a_rbeam, bn_atan2(), bn_inv2pi, bn_invpi, LOCAL, MAT4X3VEC, sph_specific::sph_SoR, sph_specific::sph_V, soltab::st_aradius, soltab::st_specific, VSUB2, X, Y, and Z. Here is the call graph for this function:  |
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R T _ S P H _ F R E E Definition at line 419 of file g_sph.c. References bu_free(). Here is the call graph for this function:  |
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1.4.6