src/rt/RcontribSimulManager.h

/* RCSid $Id: RcontribSimulManager.h,v 2.6 2024/11/06 19:45:59 greg Exp $ */
/*
 *  RcontribSimulManager.h
 *
 *      Rcontrib simulation manager class declaration
 *
 *  Created by Greg Ward on 10/11/2024.
 */

#ifndef RcontribSimulManager_h
#define RcontribSimulManager_h

#include "RtraceSimulManager.h"
#include "RdataShare.h"
#include "lookup.h"
#include "rtprocess.h"

/*
 * As with other single-object classes, many global variable affect
 * behavior.  Besides rendering parameters, there are spectral parameters
 * and output dimensions taken from the environment.
 *
 * NOTE:  "record" and "row" are used interchangeably throughout.
 */

extern char             RCCONTEXT[];            // global rcontrib context

class RcontribSimulManager;                     // need forward decl

/// Shared data object for record output (includes header; may be write-only)
class RcontribOutput {
        RcontribOutput *        next;           // next in sorted list
        char *                  ofname;         // output file name
        uint32                  rowCountPos;    // row count position in header
        void *                  rowp;           // current row memory
        bool                    NewHeader(const RcontribSimulManager *rcp);
        int                     CheckHeader(const RcontribSimulManager *rcp);
public:
        RdataShare *            rData;          // data sharing object
        size_t                  rowBytes;       // byte count per row
        const char *            omod;           // single modifier (or NULL)
        int32                   obin;           // single output bin (or -1)
        uint32                  begData;        // start of data (type-aligned)
        int32                   curRow;         // current output row
        uint32                  nRows;          // total number of rows
                                RcontribOutput(const char *fnm = NULL) {
                                        next = NULL;
                                        omod = NULL;
                                        obin = -1;
                                        rData = NULL;
                                        ofname = savqstr(fnm);
                                        rowBytes = 0;
                                        nRows = 0;
                                        rowp = NULL; curRow = -1;
                                }
                                ~RcontribOutput() {
                                        DoneRow();
                                        delete rData;
                                        delete next;
                                        freeqstr(ofname);
                                }
                                /// Return output channel name
        const char *            GetName() const {
                                        if (rData) return rData->GetName();
                                        return ofname;
                                }
                                /// Update output row count
        bool                    SetRowsDone(int r) {
                                        if (!rData | (0 >= r) | (r > nRows)) return false;
                                        char *  rbuf = (char *)rData->GetMemory(rowCountPos, 17, 0);
                                        sprintf(rbuf, "%-16d", r);
                                        rbuf[16] = '\n';        // replaces nul byte
                                        return rData->ReleaseMemory(rbuf, RDSwrite);
                                }
                                /// Get buffer for indicated row (contents may be random)
        void *                  GetRow(int r) {
                                        if (!rData | (r < 0)) return NULL;
                                        if (r != curRow) {
                                                DoneRow();
                                                if (r < nRows)
                                                        rowp = rData->GetMemory(begData + r*rowBytes,
                                                                                 rowBytes, 0);
                                                if (rowp) curRow = r;
                                        }
                                        return rowp;
                                }
                                /// Current row with byte offset
        void *                  InsertionP(int coffset) const {
                                        if (!rowp | (coffset < 0) | (coffset >= rowBytes))
                                                return NULL;
                                        return (char *)rowp + coffset;
                                }
                                /// Release current row, writing contents
        void                    DoneRow() {
                                        if (rowp) rData->ReleaseMemory(rowp, RDSwrite);
                                        rowp = NULL; curRow = -1;
                                }
                                /// Get next in list
        const RcontribOutput *  Next() const {
                                        return next;
                                }
        RcontribOutput *        Next() {
                                        return next;
                                }
                                /// RcontribSimulManager gets full access
        friend class            RcontribSimulManager;
};

typedef double          DCOLORV;        // color accumulator type

/// Modifier channel for recording contributions (no constructor/destructor)
struct RcontribMod;

/// Allocate rcontrib accumulator
extern RcontribMod *    NewRcMod(const char *prms = NULL, const char *binexpr = NULL, int ncbins = 1);
/// Free an RcontribMod
extern lut_free_t       FreeRcMod;

/*
 * General RcontribSimulManager class operation:
 *
 *  1)  Call LoadOctree(), then alter the header as desired
 *  2)  Set number of spectral samples (NCSAMP) and call SetDataFormat()
 *  3)  Set xres and yres to desired dimensions (xres>0 for picture output)
 *  4)  Call AddModifier() and AddModFile() to indicate tracked modifiers
 *  5)  Set outOp and cdsF according to desired output/recovery
 *  6)  Set desired computation flags via SetFlag()
 *  7)  Call PrepOutput() to open output channels
 *  8)  Call SetThreadCount() to fork children if desired
 *  9)  Set accum to the number of ray samples per record
 * 10)  Call ComputeRecord() with accum ray samples
 * 11)  Continue until GetRowMax() records have been sent
 * 12)  Call Cleanup()
 *
 * The order of some of these calls may be changed.  Technically, the octree
 * may be loaded anytime before PrepOutput() is called.  Also, SetThreadCount()
 * may be called anytime *after* PrepOutput(), and may be interleaved with
 * calls to ComputeRecord().  The accum setting may be changed at any time.
 * Finally, it is possible to restart the output using ResetRow(), and
 * a zero argument will rewind to the beginning, whence all records
 * may be recalculated.  The previous output rows are not zeroed or deleted,
 * but are overwritten as the calculation proceeds from the new starting point.
 * However, the output file(s) will indicate in the NROWS= line in the header
 * that only the newly calculated rows are present.  If you wish to start over
 * with a different set of modifiers or outputs, call ClearModifiers() instead,
 * which keeps the current octree in memory.  This call also returns to single
 * process mode if any children were running.
 *
 * It is not possible to write to standard output, but the output
 * model is quite flexible thanks to the RdataShare polymorphic class.
 * The current default output class creates a shared, memory-mapped file,
 * which is the most efficient object on most systems.
 *
 * ASCII output is not supported, so full data recovery is.
 */

/// Output channel opening options: new/exclusive, overwrite if exists, or recover data
enum RCOutputOp {RCOnew=0, RCOforce, RCOrecover};

/// Converts above to RdataShare open flags (may be adjusted by calling program)
extern int      RSDOflags[];

/// Call-back function type to create named data channel (freed using "delete" operator)
typedef RdataShare *    RcreateDataShareF(const char *name, RCOutputOp op, size_t siz);

/// Our default data share function
extern RcreateDataShareF        defDataShare;

/// Modifiable ray-tracing flags for rcontrib
#define RCcontrib               (RTmask+1)      // compute contributions? (r.t. coefficients)
#define RCmask                  (RTlimDist|RTimmIrrad|RCcontrib)

/// rcontrib-like simulation manager (at most one such object)
class RcontribSimulManager : protected RtraceSimulManager {
protected:
        static RayReportCall    RctCall;        // our callback for traced rays
        ABitMap                 rowsDone;       // bit mask of completed rows
        uint32                  rInPos;         // which row (record) is next on input?
        uby8                    nChan;          // NCSAMP setting for this calculation
        char                    dtyp;           // data type ('f', 'd', or 'c')
        uint16                  dsiz;           // N-component element size in bytes
        RcontribOutput *        outList;        // ordered list of output channels
        LUTAB                   modLUT;         // modifier lookup table
        SUBPROC *               kid;            // array of child processes
        int32 *                 kidRow;         // row assigned to each child
        int                     nkids;          // child process count (-1 in child)
        bool                    UpdateRowsDone(int r);
        int                     GetChild(bool forceWait = false);
        bool                    StartKids(int n2go);
        int                     StopKids(int n2end = 0);
        void                    RunChild();
public:
        RCOutputOp              outOp;          // output operation
        RcreateDataShareF *     cdsF;           // data share creator
        int                     xres, yres;     // output (picture) size
        uint32                  accum;          // # rays to accumulate per record
                                RcontribSimulManager(const char *octn = NULL)
                                                : RtraceSimulManager(NULL, NULL, octn) {
                                        rInPos = 0;
                                        nChan = 0;
                                        dtyp = 'f';
                                        dsiz = 0;
                                        outList = NULL;
                                        memset(&modLUT, 0, sizeof(modLUT));
                                        modLUT.hashf = lu_shash;
                                        modLUT.keycmp = strcmp;
                                        modLUT.freek = efree;
                                        modLUT.freed = FreeRcMod;
                                        kid = NULL; kidRow = NULL; nkids = 0;
                                        rtFlags = RTtraceSources;
                                        SetTraceCall(&RctCall, this);
                                        outOp = RCOnew;
                                        cdsF = &defDataShare;
                                        xres = yres = 0;
                                        accum = 1;
                                }
                                ~RcontribSimulManager() {
                                        if (nkids >= 0) ClearModifiers();
                                }
                                /// Check modifiable ray-tracing computation flag(s)
        bool                    HasFlag(int fl) const {
                                        return ((rtFlags & RCmask & fl) != 0);
                                }
                                /// Set/reset modifiable ray-tracing computation flag(s)
        bool                    SetFlag(int fl, bool val = true) {
                                        if (!(fl &= RCmask)) return false;
                                        if (val) rtFlags |= fl;
                                        else rtFlags &= ~fl;
                                        return true;
                                }
                                /// Load octree and prepare renderer
        bool                    LoadOctree(const char *octn) {
                                        return RtraceSimulManager::LoadOctree(octn);
                                }
                                /// Prepare header from previous input (or clear)
        bool                    NewHeader(const char *inspec=NULL) {
                                        return RtraceSimulManager::NewHeader(inspec);
                                }
                                /// Add a string to header (adds newline if none)
        bool                    AddHeader(const char *str) {
                                        return RtraceSimulManager::AddHeader(str);
                                }
                                /// Append program line to header
        bool                    AddHeader(int ac, char *av[]) {
                                        return RtraceSimulManager::AddHeader(ac, av);
                                }
                                /// Get current header length in bytes
        int                     GetHeadLen() const {
                                        return RtraceSimulManager::GetHeadLen();
                                }
                                /// Get header lines if any
        const char *            GetHeadStr() const {
                                        return RtraceSimulManager::GetHeadStr();
                                }
                                /// Look for specific header keyword, return value
        const char *            GetHeadStr(const char *key, bool inOK = false) const {
                                        return RtraceSimulManager::GetHeadStr(key, inOK);
                                }
                                /// Set output format ('f', 'd', or 'c'), call before mods
        bool                    SetDataFormat(int ty);
                                /// Get current format (and element size in bytes)
        int                     GetFormat(int *siz = NULL) const {
                                        if (siz) *siz = dsiz;
                                        return dtyp;
                                }
                                /// Add a modifier and arguments, create output(s)
        bool                    AddModifier(const char *modn, const char *outspec,
                                                const char *prms = NULL,
                                                const char *binval = NULL, int bincnt = 1);
                                /// Add a file of modifiers with associated arguments
        bool                    AddModFile(const char *modfn, const char *outspec,
                                                const char *prms = NULL,
                                                const char *binval = NULL, int bincnt = 1);
                                /// Get named rcontrib output (or list)
        const RcontribOutput *  GetOutput(const char *nm = NULL) const {
                                        if (!nm) return outList;
                                        const RcontribOutput *  op = outList;
                                        while (op && strcmp(op->GetName(), nm))
                                                op = op->next;
                                        return op;
                                }
                                /// Open output channels and return # completed rows
        int                     PrepOutput();
                                /// Are we ready to compute some records?
        bool                    Ready() const {
                                        return (rowsDone.Length() > 0) & (accum > 0);
                                }
                                /// Set number of computation threads (0 => #cores)
        int                     SetThreadCount(int nt = 0);
                                /// Check thread count (1 means no multi-processing)
        int                     NThreads() const {
                                        return nkids + !nkids;
                                }
                                /// What is maximum row?
        int                     GetRowMax() const {
                                        if (!outList) return yres * (xres + !xres);
                                        return outList->nRows;
                                }
                                /// Get current row count (# rows sent for computation)
        int                     GetRowCount() const {
                                        return rInPos;
                                }
                                /// Get # rows completed
        int                     GetRowFinished() const {
                                        if (!nkids) return rInPos;
                                        uint32  nDone = rowsDone.Find(0, false);
                                        if (nDone == ABMend)
                                                return rowsDone.Length();
                                        return nDone;
                                }
                                /// Add a ray/bundle to compute next record (n=accum)
        int                     ComputeRecord(const FVECT orig_direc[]);
                                /// Finish pending rays if multi-processing
        bool                    FlushQueue() {
                                        if (nkids <= 0) return true;
                                        while (GetChild(true) >= 0)
                                                ;
                                        return true;
                                }
                                /// Rewind calculation (previous results unchanged)
        bool                    ResetRow(int r);
                                /// Clear the modifiers and close all outputs
        void                    ClearModifiers() {
                                        if (rowsDone.Length()) {
                                                SetThreadCount(1);
                                                cow_doneshare();
                                                rowsDone.NewBitMap(0);
                                        }
                                        lu_done(&modLUT);
                                        delete outList; outList = NULL;
                                        nChan = 0;
                                }
                                /// Close octree, free data, return status
        int                     Cleanup(bool everything = false) {
                                        ClearModifiers();
                                        return RtraceSimulManager::Cleanup(everything);
                                }
};

#endif /* RcontribSimulManager_h */
Revision:	2.7
Committed:	Fri Nov 8 15:49:34 2024 UTC (11 months, 4 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.6:	+14 -8 lines
Log Message:	feat(rxcontrib): Added ClearModifiers() call to restart with same octree
#	User	Rev	Content
1	greg	2.7	/* RCSid $Id: RcontribSimulManager.h,v 2.6 2024/11/06 19:45:59 greg Exp $ */
2	greg	2.1	/*
3			* RcontribSimulManager.h
4			*
5			* Rcontrib simulation manager class declaration
6			*
7			* Created by Greg Ward on 10/11/2024.
8			*/
9
10			#ifndef RcontribSimulManager_h
11			#define RcontribSimulManager_h
12
13			#include "RtraceSimulManager.h"
14			#include "RdataShare.h"
15			#include "lookup.h"
16			#include "rtprocess.h"
17
18			/*
19			* As with other single-object classes, many global variable affect
20			* behavior. Besides rendering parameters, there are spectral parameters
21			* and output dimensions taken from the environment.
22			*
23			* NOTE: "record" and "row" are used interchangeably throughout.
24			*/
25
26			extern char RCCONTEXT[]; // global rcontrib context
27
28	greg	2.2	class RcontribSimulManager; // need forward decl
29	greg	2.1
30			/// Shared data object for record output (includes header; may be write-only)
31			class RcontribOutput {
32			RcontribOutput * next; // next in sorted list
33			char * ofname; // output file name
34			uint32 rowCountPos; // row count position in header
35			void * rowp; // current row memory
36			bool NewHeader(const RcontribSimulManager *rcp);
37			int CheckHeader(const RcontribSimulManager *rcp);
38			public:
39			RdataShare * rData; // data sharing object
40			size_t rowBytes; // byte count per row
41			const char * omod; // single modifier (or NULL)
42			int32 obin; // single output bin (or -1)
43			uint32 begData; // start of data (type-aligned)
44			int32 curRow; // current output row
45			uint32 nRows; // total number of rows
46			RcontribOutput(const char *fnm = NULL) {
47			next = NULL;
48			omod = NULL;
49			obin = -1;
50			rData = NULL;
51			ofname = savqstr(fnm);
52			rowBytes = 0;
53			nRows = 0;
54			rowp = NULL; curRow = -1;
55			}
56			~RcontribOutput() {
57			DoneRow();
58			delete rData;
59			delete next;
60			freeqstr(ofname);
61			}
62			/// Return output channel name
63			const char * GetName() const {
64			if (rData) return rData->GetName();
65			return ofname;
66			}
67			/// Update output row count
68			bool SetRowsDone(int r) {
69			if (!rData \| (0 >= r) \| (r > nRows)) return false;
70			char * rbuf = (char *)rData->GetMemory(rowCountPos, 17, 0);
71			sprintf(rbuf, "%-16d", r);
72			rbuf[16] = '\n'; // replaces nul byte
73			return rData->ReleaseMemory(rbuf, RDSwrite);
74			}
75			/// Get buffer for indicated row (contents may be random)
76			void * GetRow(int r) {
77			if (!rData \| (r < 0)) return NULL;
78			if (r != curRow) {
79			DoneRow();
80			if (r < nRows)
81			rowp = rData->GetMemory(begData + r*rowBytes,
82			rowBytes, 0);
83			if (rowp) curRow = r;
84			}
85			return rowp;
86			}
87			/// Current row with byte offset
88			void * InsertionP(int coffset) const {
89			if (!rowp \| (coffset < 0) \| (coffset >= rowBytes))
90			return NULL;
91			return (char *)rowp + coffset;
92			}
93			/// Release current row, writing contents
94			void DoneRow() {
95			if (rowp) rData->ReleaseMemory(rowp, RDSwrite);
96			rowp = NULL; curRow = -1;
97			}
98			/// Get next in list
99			const RcontribOutput * Next() const {
100			return next;
101			}
102			RcontribOutput * Next() {
103			return next;
104			}
105			/// RcontribSimulManager gets full access
106			friend class RcontribSimulManager;
107			};
108
109			typedef double DCOLORV; // color accumulator type
110
111			/// Modifier channel for recording contributions (no constructor/destructor)
112			struct RcontribMod;
113
114			/// Allocate rcontrib accumulator
115			extern RcontribMod * NewRcMod(const char prms = NULL, const char binexpr = NULL, int ncbins = 1);
116			/// Free an RcontribMod
117			extern lut_free_t FreeRcMod;
118
119			/*
120			* General RcontribSimulManager class operation:
121			*
122			* 1) Call LoadOctree(), then alter the header as desired
123			* 2) Set number of spectral samples (NCSAMP) and call SetDataFormat()
124	greg	2.6	* 3) Set xres and yres to desired dimensions (xres>0 for picture output)
125			* 4) Call AddModifier() and AddModFile() to indicate tracked modifiers
126			* 5) Set outOp and cdsF according to desired output/recovery
127			* 6) Set desired computation flags via SetFlag()
128			* 7) Call PrepOutput() to open output channels
129			* 8) Call SetThreadCount() to fork children if desired
130			* 9) Set accum to the number of ray samples per record
131			* 10) Call ComputeRecord() with accum ray samples
132			* 11) Continue until GetRowMax() records have been sent
133			* 12) Call Cleanup()
134	greg	2.1	*
135			* The order of some of these calls may be changed. Technically, the octree
136			* may be loaded anytime before PrepOutput() is called. Also, SetThreadCount()
137	greg	2.6	* may be called anytime after PrepOutput(), and may be interleaved with
138	greg	2.1	* calls to ComputeRecord(). The accum setting may be changed at any time.
139			* Finally, it is possible to restart the output using ResetRow(), and
140			* a zero argument will rewind to the beginning, whence all records
141			* may be recalculated. The previous output rows are not zeroed or deleted,
142			* but are overwritten as the calculation proceeds from the new starting point.
143			* However, the output file(s) will indicate in the NROWS= line in the header
144	greg	2.7	* that only the newly calculated rows are present. If you wish to start over
145			* with a different set of modifiers or outputs, call ClearModifiers() instead,
146			* which keeps the current octree in memory. This call also returns to single
147			* process mode if any children were running.
148	greg	2.1	*
149			* It is not possible to write to standard output, but the output
150			* model is quite flexible thanks to the RdataShare polymorphic class.
151			* The current default output class creates a shared, memory-mapped file,
152			* which is the most efficient object on most systems.
153			*
154			* ASCII output is not supported, so full data recovery is.
155			*/
156
157			/// Output channel opening options: new/exclusive, overwrite if exists, or recover data
158	greg	2.3	enum RCOutputOp {RCOnew=0, RCOforce, RCOrecover};
159	greg	2.1
160			/// Converts above to RdataShare open flags (may be adjusted by calling program)
161			extern int RSDOflags[];
162
163			/// Call-back function type to create named data channel (freed using "delete" operator)
164			typedef RdataShare * RcreateDataShareF(const char *name, RCOutputOp op, size_t siz);
165
166			/// Our default data share function
167			extern RcreateDataShareF defDataShare;
168
169	greg	2.2	/// Modifiable ray-tracing flags for rcontrib
170	greg	2.6	#define RCcontrib (RTmask+1) // compute contributions? (r.t. coefficients)
171			#define RCmask (RTlimDist\|RTimmIrrad\|RCcontrib)
172	greg	2.1
173			/// rcontrib-like simulation manager (at most one such object)
174			class RcontribSimulManager : protected RtraceSimulManager {
175			protected:
176			static RayReportCall RctCall; // our callback for traced rays
177			ABitMap rowsDone; // bit mask of completed rows
178			uint32 rInPos; // which row (record) is next on input?
179			uby8 nChan; // NCSAMP setting for this calculation
180			char dtyp; // data type ('f', 'd', or 'c')
181			uint16 dsiz; // N-component element size in bytes
182			RcontribOutput * outList; // ordered list of output channels
183			LUTAB modLUT; // modifier lookup table
184			SUBPROC * kid; // array of child processes
185			int32 * kidRow; // row assigned to each child
186			int nkids; // child process count (-1 in child)
187			bool UpdateRowsDone(int r);
188			int GetChild(bool forceWait = false);
189			bool StartKids(int n2go);
190			int StopKids(int n2end = 0);
191			void RunChild();
192			public:
193			RCOutputOp outOp; // output operation
194			RcreateDataShareF * cdsF; // data share creator
195	greg	2.6	int xres, yres; // output (picture) size
196	greg	2.1	uint32 accum; // # rays to accumulate per record
197			RcontribSimulManager(const char *octn = NULL)
198			: RtraceSimulManager(NULL, NULL, octn) {
199			rInPos = 0;
200			nChan = 0;
201			dtyp = 'f';
202			dsiz = 0;
203			outList = NULL;
204			memset(&modLUT, 0, sizeof(modLUT));
205			modLUT.hashf = lu_shash;
206			modLUT.keycmp = strcmp;
207			modLUT.freek = efree;
208			modLUT.freed = FreeRcMod;
209			kid = NULL; kidRow = NULL; nkids = 0;
210			rtFlags = RTtraceSources;
211			SetTraceCall(&RctCall, this);
212			outOp = RCOnew;
213			cdsF = &defDataShare;
214	greg	2.6	xres = yres = 0;
215	greg	2.1	accum = 1;
216			}
217			~RcontribSimulManager() {
218	greg	2.7	if (nkids >= 0) ClearModifiers();
219	greg	2.1	}
220	greg	2.2	/// Check modifiable ray-tracing computation flag(s)
221			bool HasFlag(int fl) const {
222			return ((rtFlags & RCmask & fl) != 0);
223			}
224			/// Set/reset modifiable ray-tracing computation flag(s)
225			bool SetFlag(int fl, bool val = true) {
226			if (!(fl &= RCmask)) return false;
227			if (val) rtFlags \|= fl;
228			else rtFlags &= ~fl;
229			return true;
230			}
231	greg	2.1	/// Load octree and prepare renderer
232			bool LoadOctree(const char *octn) {
233			return RtraceSimulManager::LoadOctree(octn);
234			}
235			/// Prepare header from previous input (or clear)
236			bool NewHeader(const char *inspec=NULL) {
237			return RtraceSimulManager::NewHeader(inspec);
238			}
239			/// Add a string to header (adds newline if none)
240			bool AddHeader(const char *str) {
241			return RtraceSimulManager::AddHeader(str);
242			}
243			/// Append program line to header
244			bool AddHeader(int ac, char *av[]) {
245			return RtraceSimulManager::AddHeader(ac, av);
246			}
247			/// Get current header length in bytes
248			int GetHeadLen() const {
249			return RtraceSimulManager::GetHeadLen();
250			}
251			/// Get header lines if any
252			const char * GetHeadStr() const {
253			return RtraceSimulManager::GetHeadStr();
254			}
255			/// Look for specific header keyword, return value
256			const char * GetHeadStr(const char *key, bool inOK = false) const {
257			return RtraceSimulManager::GetHeadStr(key, inOK);
258			}
259			/// Set output format ('f', 'd', or 'c'), call before mods
260			bool SetDataFormat(int ty);
261			/// Get current format (and element size in bytes)
262			int GetFormat(int *siz = NULL) const {
263			if (siz) *siz = dsiz;
264			return dtyp;
265			}
266			/// Add a modifier and arguments, create output(s)
267			bool AddModifier(const char modn, const char outspec,
268			const char *prms = NULL,
269			const char *binval = NULL, int bincnt = 1);
270			/// Add a file of modifiers with associated arguments
271			bool AddModFile(const char modfn, const char outspec,
272			const char *prms = NULL,
273			const char *binval = NULL, int bincnt = 1);
274	greg	2.2	/// Get named rcontrib output (or list)
275			const RcontribOutput * GetOutput(const char *nm = NULL) const {
276			if (!nm) return outList;
277			const RcontribOutput * op = outList;
278			while (op && strcmp(op->GetName(), nm))
279			op = op->next;
280			return op;
281			}
282	greg	2.1	/// Open output channels and return # completed rows
283			int PrepOutput();
284			/// Are we ready to compute some records?
285			bool Ready() const {
286	greg	2.4	return (rowsDone.Length() > 0) & (accum > 0);
287	greg	2.1	}
288			/// Set number of computation threads (0 => #cores)
289			int SetThreadCount(int nt = 0);
290			/// Check thread count (1 means no multi-processing)
291			int NThreads() const {
292			return nkids + !nkids;
293			}
294			/// What is maximum row?
295			int GetRowMax() const {
296			if (!outList) return yres * (xres + !xres);
297			return outList->nRows;
298			}
299			/// Get current row count (# rows sent for computation)
300			int GetRowCount() const {
301			return rInPos;
302			}
303			/// Get # rows completed
304			int GetRowFinished() const {
305			if (!nkids) return rInPos;
306			uint32 nDone = rowsDone.Find(0, false);
307			if (nDone == ABMend)
308			return rowsDone.Length();
309			return nDone;
310			}
311			/// Add a ray/bundle to compute next record (n=accum)
312			int ComputeRecord(const FVECT orig_direc[]);
313			/// Finish pending rays if multi-processing
314			bool FlushQueue() {
315			if (nkids <= 0) return true;
316			while (GetChild(true) >= 0)
317			;
318			return true;
319			}
320	greg	2.7	/// Rewind calculation (previous results unchanged)
321			bool ResetRow(int r);
322			/// Clear the modifiers and close all outputs
323			void ClearModifiers() {
324	greg	2.1	if (rowsDone.Length()) {
325			SetThreadCount(1);
326			cow_doneshare();
327			rowsDone.NewBitMap(0);
328			}
329			lu_done(&modLUT);
330			delete outList; outList = NULL;
331			nChan = 0;
332	greg	2.7	}
333			/// Close octree, free data, return status
334			int Cleanup(bool everything = false) {
335			ClearModifiers();
336	greg	2.1	return RtraceSimulManager::Cleanup(everything);
337			}
338			};
339
340			#endif /* RcontribSimulManager_h */