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greg |
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#ifndef lint
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static const char RCSid[] = "$Id$";
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#endif
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/*
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* RtraceSimulManager.cpp
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*
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* Rtrace simulation manager class implementation
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*
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* Created by Greg Ward on 2/2/2023.
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*/
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#include "RtraceSimulManager.h"
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#include "source.h"
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extern int castonly; // doing ray-casting only?
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// Load octree and prepare renderer
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bool
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RadSimulManager::LoadOctree(const char *octn)
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{
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if (octname) { // already running?
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if (octn && !strcmp(octn, octname))
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return true;
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Cleanup();
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}
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if (!octn)
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return false;
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ray_init((char *)octn);
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return true;
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}
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// Set number of computation threads (0 => #cores)
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int
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RadSimulManager::SetThreadCount(int nt)
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{
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return nThreads = 1; // XXX temporary
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}
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// Close octree, free data, return status
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int
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RadSimulManager::Cleanup()
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{
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ray_done(0);
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return 0;
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}
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// How many threads are currently unoccupied?
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int
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RadSimulManager::ThreadsAvailable() const
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{
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return 1; // XXX temporary
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}
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// Global pointer to simulation manager for trace call-back (only one)
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static const RtraceSimulManager * ourRTsimMan = NULL;
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void // static call-back
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RtraceSimulManager::RTracer(RAY *r)
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{
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(*ourRTsimMan->traceCall)(r, ourRTsimMan->tcData);
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}
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// Check for changes to render flags & adjust accordingly
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bool
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RtraceSimulManager::UpdateMode()
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{
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rtFlags &= RTmask;
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if (!cookedCall)
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rtFlags &= ~RTdoFIFO;
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if (!traceCall)
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rtFlags &= ~RTtraceSources;
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if (rtFlags & RTimmIrrad)
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rtFlags &= ~RTlimDist;
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int misMatch = rtFlags ^ curFlags;
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// updates based on toggled flags
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if (misMatch & RTtraceSources) {
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if (rtFlags & RTtraceSources) {
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for (int sn = 0; sn < nsources; sn++)
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source[sn].sflags |= SFOLLOW;
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} else // cannot undo this...
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rtFlags |= RTtraceSources;
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}
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if (misMatch & RTdoFIFO) {
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if (!FlushQueue())
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return false;
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}
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curFlags = rtFlags;
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// update trace callback
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if (traceCall) {
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if (ourRTsimMan && ourRTsimMan != this)
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error(WARNING, "Competing top-level simulation managers?");
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ourRTsimMan = this;
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trace = RTracer;
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} else if (ourRTsimMan == this) {
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trace = NULL;
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ourRTsimMan = NULL;
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}
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return true;
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}
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extern "C" int m_normal(OBJREC *m, RAY *r);
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/* compute irradiance rather than radiance */
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static void
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rayirrad(RAY *r)
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{
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/* pretend we hit surface */
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r->rxt = r->rot = 1e-5;
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VSUM(r->rop, r->rorg, r->rdir, r->rot);
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r->ron[0] = -r->rdir[0];
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r->ron[1] = -r->rdir[1];
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r->ron[2] = -r->rdir[2];
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r->rod = 1.0;
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/* compute result */
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r->revf = raytrace;
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m_normal(&Lamb, r);
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r->revf = rayirrad;
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}
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/* compute first ray intersection only */
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static void
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raycast(RAY *r)
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{
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if (!localhit(r, &thescene)) {
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if (r->ro == &Aftplane) { /* clipped */
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r->ro = NULL;
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r->rot = FHUGE;
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} else
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sourcehit(r);
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}
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}
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// Add ray bundle to queue w/ optional 1st ray ID
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int
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RtraceSimulManager::EnqueueBundle(const FVECT orig_direc[], int n, RNUMBER rID0)
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{
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int nqueued = 0;
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RAY res;
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if (!Ready())
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return -1;
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if (castonly && !cookedCall)
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error(CONSISTENCY, "EnqueueBundle() called in castonly mode without cookedCall");
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if (!UpdateMode()) // update rendering mode if requested
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return -1;
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while (n-- > 0) { // queue each ray
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double d;
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VCOPY(res.rorg, orig_direc[0]);
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VCOPY(res.rdir, orig_direc[1]);
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orig_direc += 2;
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rayorigin(&res, PRIMARY, NULL, NULL);
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if (rID0) res.rno = rID0++;
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else res.rno = ++lastRayID;
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if (curFlags & RTimmIrrad)
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res.revf = rayirrad;
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else if (castonly)
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res.revf = raycast;
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d = normalize(res.rdir);
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if (d > 0) { // direction vector is valid?
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if (curFlags & RTlimDist)
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res.rmax = d;
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samplendx++;
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rayvalue(&res); // XXX single-threaded for now
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++nqueued;
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} else if (ThreadsAvailable() < NThreads() &&
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!FlushQueue())
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return -1;
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if (cookedCall)
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(*cookedCall)(&res, ccData);
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}
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return nqueued;
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}
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// Finish pending rays and complete callbacks
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bool
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RtraceSimulManager::FlushQueue()
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{
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return true; // XXX no-op for now
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}
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