| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: RtraceSimulManager.cpp,v 2.5 2024/03/12 16:54:51 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* RtraceSimulManager.cpp |
| 6 |
* |
| 7 |
* Rtrace simulation manager class implementation |
| 8 |
* |
| 9 |
* Created by Greg Ward on 2/2/2023. |
| 10 |
*/ |
| 11 |
|
| 12 |
#include <unistd.h> |
| 13 |
#include "RtraceSimulManager.h" |
| 14 |
#include "source.h" |
| 15 |
|
| 16 |
// Load octree and prepare renderer |
| 17 |
bool |
| 18 |
RadSimulManager::LoadOctree(const char *octn) |
| 19 |
{ |
| 20 |
if (octname) { // already running? |
| 21 |
if (octn && !strcmp(octn, octname)) |
| 22 |
return true; |
| 23 |
Cleanup(); |
| 24 |
} |
| 25 |
if (!octn) |
| 26 |
return false; |
| 27 |
|
| 28 |
ray_init((char *)octn); |
| 29 |
return true; |
| 30 |
} |
| 31 |
|
| 32 |
// How many processors are available? |
| 33 |
int |
| 34 |
RadSimulManager::GetNCores() |
| 35 |
{ |
| 36 |
return sysconf(_SC_NPROCESSORS_ONLN); |
| 37 |
} |
| 38 |
|
| 39 |
// Set number of computation threads (0 => #cores) |
| 40 |
int |
| 41 |
RadSimulManager::SetThreadCount(int nt) |
| 42 |
{ |
| 43 |
if (!Ready()) |
| 44 |
return 0; |
| 45 |
|
| 46 |
if (nt <= 0) nt = castonly ? 1 : GetNCores(); |
| 47 |
|
| 48 |
if (nt == 1) |
| 49 |
ray_pclose(ray_pnprocs); |
| 50 |
else if (nt < ray_pnprocs) |
| 51 |
ray_pclose(ray_pnprocs - nt); |
| 52 |
else if (nt > ray_pnprocs) |
| 53 |
ray_popen(nt - ray_pnprocs); |
| 54 |
|
| 55 |
return NThreads(); |
| 56 |
} |
| 57 |
|
| 58 |
// Assign ray to subthread (fails if NThreads()<2) |
| 59 |
bool |
| 60 |
RadSimulManager::SplitRay(RAY *r) |
| 61 |
{ |
| 62 |
if (!ray_pnprocs || ThreadsAvailable() < 1) |
| 63 |
return false; |
| 64 |
|
| 65 |
return (ray_psend(r) > 0); |
| 66 |
} |
| 67 |
|
| 68 |
// Process a ray (in subthread), optional result |
| 69 |
bool |
| 70 |
RadSimulManager::ProcessRay(RAY *r) |
| 71 |
{ |
| 72 |
if (!Ready()) return false; |
| 73 |
|
| 74 |
if (!ray_pnprocs) { // single-threaded mode? |
| 75 |
samplendx++; |
| 76 |
rayvalue(r); |
| 77 |
return true; |
| 78 |
} |
| 79 |
int rv = ray_pqueue(r); |
| 80 |
if (rv < 0) { |
| 81 |
error(WARNING, "ray tracing process(es) died"); |
| 82 |
return false; |
| 83 |
} |
| 84 |
return (rv > 0); |
| 85 |
} |
| 86 |
|
| 87 |
// Wait for next result (or fail) |
| 88 |
bool |
| 89 |
RadSimulManager::WaitResult(RAY *r) |
| 90 |
{ |
| 91 |
if (!ray_pnprocs) |
| 92 |
return false; |
| 93 |
|
| 94 |
return (ray_presult(r, 0) > 0); |
| 95 |
} |
| 96 |
|
| 97 |
// Close octree, free data, return status |
| 98 |
int |
| 99 |
RadSimulManager::Cleanup(bool everything) |
| 100 |
{ |
| 101 |
if (!ray_pnprocs) |
| 102 |
ray_pdone(everything); |
| 103 |
else |
| 104 |
ray_done(everything); |
| 105 |
return 0; |
| 106 |
} |
| 107 |
|
| 108 |
// How many threads are currently unoccupied? |
| 109 |
int |
| 110 |
RadSimulManager::ThreadsAvailable() const |
| 111 |
{ |
| 112 |
if (!ray_pnprocs) return 1; |
| 113 |
|
| 114 |
return ray_pnidle; |
| 115 |
} |
| 116 |
|
| 117 |
// Global pointer to simulation manager for trace call-back (only one) |
| 118 |
static const RtraceSimulManager * ourRTsimMan = NULL; |
| 119 |
|
| 120 |
void // static call-back |
| 121 |
RtraceSimulManager::RTracer(RAY *r) |
| 122 |
{ |
| 123 |
(*ourRTsimMan->traceCall)(r, ourRTsimMan->tcData); |
| 124 |
} |
| 125 |
|
| 126 |
// Call-back for FIFO output |
| 127 |
int |
| 128 |
RtraceSimulManager::Rfifout(RAY *r) |
| 129 |
{ |
| 130 |
return (*ourRTsimMan->cookedCall)(r, ourRTsimMan->ccData); |
| 131 |
} |
| 132 |
|
| 133 |
// Check for changes to render flags & adjust accordingly |
| 134 |
bool |
| 135 |
RtraceSimulManager::UpdateMode() |
| 136 |
{ |
| 137 |
rtFlags &= RTmask; |
| 138 |
if (!cookedCall) |
| 139 |
rtFlags &= ~RTdoFIFO; |
| 140 |
if (!traceCall) |
| 141 |
rtFlags &= ~RTtraceSources; |
| 142 |
if (rtFlags & RTimmIrrad) |
| 143 |
rtFlags &= ~RTlimDist; |
| 144 |
|
| 145 |
int misMatch = rtFlags ^ curFlags; |
| 146 |
// updates based on toggled flags |
| 147 |
if (misMatch & RTtraceSources) { |
| 148 |
if (rtFlags & RTtraceSources) { |
| 149 |
for (int sn = 0; sn < nsources; sn++) |
| 150 |
source[sn].sflags |= SFOLLOW; |
| 151 |
} else // cannot undo this... |
| 152 |
rtFlags |= RTtraceSources; |
| 153 |
} |
| 154 |
if (misMatch & RTdoFIFO && FlushQueue() < 0) |
| 155 |
return false; |
| 156 |
curFlags = rtFlags; |
| 157 |
// update callbacks |
| 158 |
if (traceCall) |
| 159 |
trace = RTracer; |
| 160 |
else if (trace == RTracer) |
| 161 |
trace = NULL; |
| 162 |
if (rtFlags & RTdoFIFO) |
| 163 |
ray_fifo_out = Rfifout; |
| 164 |
else if (ray_fifo_out == Rfifout) |
| 165 |
ray_fifo_out = NULL; |
| 166 |
if ((trace != RTracer) & (ray_fifo_out != Rfifout)) { |
| 167 |
ourRTsimMan = NULL; |
| 168 |
} else if (ourRTsimMan != this) { |
| 169 |
if (ourRTsimMan) |
| 170 |
error(WARNING, "Competing top-level simulation managers?"); |
| 171 |
ourRTsimMan = this; |
| 172 |
} |
| 173 |
return true; |
| 174 |
} |
| 175 |
|
| 176 |
extern "C" int m_normal(OBJREC *m, RAY *r); |
| 177 |
|
| 178 |
// compute irradiance rather than radiance |
| 179 |
static void |
| 180 |
rayirrad(RAY *r) |
| 181 |
{ |
| 182 |
/* pretend we hit surface */ |
| 183 |
r->rxt = r->rot = 1e-5; |
| 184 |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
| 185 |
r->ron[0] = -r->rdir[0]; |
| 186 |
r->ron[1] = -r->rdir[1]; |
| 187 |
r->ron[2] = -r->rdir[2]; |
| 188 |
r->rod = 1.0; |
| 189 |
/* compute result */ |
| 190 |
r->revf = raytrace; |
| 191 |
m_normal(&Lamb, r); |
| 192 |
r->revf = rayirrad; |
| 193 |
} |
| 194 |
|
| 195 |
// compute first ray intersection only |
| 196 |
static void |
| 197 |
raycast(RAY *r) |
| 198 |
{ |
| 199 |
if (!localhit(r, &thescene)) { |
| 200 |
if (r->ro == &Aftplane) { /* clipped */ |
| 201 |
r->ro = NULL; |
| 202 |
r->rot = FHUGE; |
| 203 |
} else |
| 204 |
sourcehit(r); |
| 205 |
} |
| 206 |
} |
| 207 |
|
| 208 |
// Add ray bundle to queue w/ optional 1st ray ID |
| 209 |
int |
| 210 |
RtraceSimulManager::EnqueueBundle(const FVECT orig_direc[], int n, RNUMBER rID0) |
| 211 |
{ |
| 212 |
int nqueued = 0; |
| 213 |
RAY res; |
| 214 |
|
| 215 |
if (!Ready()) |
| 216 |
return -1; |
| 217 |
|
| 218 |
if (castonly && !cookedCall) |
| 219 |
error(CONSISTENCY, "EnqueueBundle() called in castonly mode without cookedCall"); |
| 220 |
|
| 221 |
if (!UpdateMode()) // update rendering mode if requested |
| 222 |
return -1; |
| 223 |
|
| 224 |
while (n-- > 0) { // queue each ray |
| 225 |
VCOPY(res.rorg, orig_direc[0]); |
| 226 |
VCOPY(res.rdir, orig_direc[1]); |
| 227 |
orig_direc += 2; |
| 228 |
rayorigin(&res, PRIMARY, NULL, NULL); |
| 229 |
if (rID0) res.rno = rID0++; |
| 230 |
else res.rno = ++lastRayID; |
| 231 |
if (curFlags & RTimmIrrad) |
| 232 |
res.revf = rayirrad; |
| 233 |
else if (castonly) |
| 234 |
res.revf = raycast; |
| 235 |
double d = normalize(res.rdir); |
| 236 |
bool sendRes = (cookedCall != NULL); |
| 237 |
if (d > 0) { // direction vector is valid? |
| 238 |
if (curFlags & RTlimDist) |
| 239 |
res.rmax = d; |
| 240 |
if (curFlags & RTdoFIFO) { |
| 241 |
ray_fifo_in(&res); |
| 242 |
sendRes = false; |
| 243 |
} else |
| 244 |
sendRes &= ProcessRay(&res); |
| 245 |
} else if (ThreadsAvailable() < NThreads() && |
| 246 |
FlushQueue() < 0) |
| 247 |
return -1; |
| 248 |
// may be dummy ray |
| 249 |
if (sendRes && (*cookedCall)(&res, ccData) < 0) |
| 250 |
return -1; |
| 251 |
nqueued++; |
| 252 |
} |
| 253 |
return nqueued; |
| 254 |
} |
| 255 |
|
| 256 |
// Finish pending rays and complete callbacks |
| 257 |
int |
| 258 |
RtraceSimulManager::FlushQueue() |
| 259 |
{ |
| 260 |
if (curFlags & RTdoFIFO) |
| 261 |
return ray_fifo_flush(); |
| 262 |
|
| 263 |
int nsent = 0; |
| 264 |
RAY res; |
| 265 |
|
| 266 |
while (WaitResult(&res)) { |
| 267 |
if (!cookedCall) continue; |
| 268 |
int rv = (*cookedCall)(&res, ccData); |
| 269 |
if (rv < 0) return -1; |
| 270 |
nsent += rv; |
| 271 |
} |
| 272 |
return nsent; |
| 273 |
} |
