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* 3/24/87 |
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*/ |
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#include "standard.h" |
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#include "ray.h" |
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#include "color.h" |
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#include "rpaint.h" |
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#include <signal.h> |
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VIEW ourview = STDVIEW; /* viewing parameters */ |
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int hresolu, vresolu; /* image resolution */ |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
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int ndims = 0; /* number of sampling dimensions */ |
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int samplendx = 0; /* index for this sample */ |
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|
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int psample = 8; /* pixel sample size */ |
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double maxdiff = .15; /* max. sample difference */ |
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .1; /* shadow threshold */ |
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double shadcert = .25; /* shadow certainty */ |
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int directrelay = 0; /* number of source relays */ |
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int vspretest = 32; /* virtual source pretest density */ |
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int maxdepth = 4; /* maximum recursion depth */ |
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double minweight = 1e-2; /* minimum ray weight */ |
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RECT pframe; /* current frame boundaries */ |
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int pdepth; /* image depth in current frame */ |
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static char *reserve_mem = NULL; /* pre-allocated reserve memory */ |
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|
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#define RESERVE_AMT 8192 /* amount of memory to reserve */ |
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|
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#define CTRL(c) ('c'-'@') |
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char buf[32]; |
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devopen(devname); /* open device */ |
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newimage(); /* set up image */ |
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newimage(); /* start image (calls fillreserves) */ |
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for ( ; ; ) { /* quit in command() */ |
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while (hresolu <= 1<<pdepth && |
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vresolu <= 1<<pdepth) |
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while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth) |
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command("done: "); |
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if (hresolu <= psample<<pdepth && |
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vresolu <= psample<<pdepth) { |
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while (reserve_mem == NULL) |
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command("out of memory: "); |
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errno = 0; |
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if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) { |
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sprintf(buf, "%d sampling...\n", 1<<pdepth); |
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(*dev->comout)(buf); |
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rsample(); |
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(*dev->comout)(buf); |
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refine(&ptrunk, 0, 0, hresolu, vresolu, pdepth+1); |
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} |
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if (dev->inpready) |
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if (errno == ENOMEM) /* ran out of memory */ |
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freereserves(); |
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else if (dev->inpready) /* noticed some input */ |
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command(": "); |
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else |
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else /* finished this depth */ |
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pdepth++; |
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} |
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} |
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fillreserves() /* fill memory reserves */ |
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{ |
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if (reserve_mem != NULL) |
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return; |
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reserve_mem = malloc(RESERVE_AMT); |
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} |
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|
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|
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freereserves() /* free memory reserves */ |
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{ |
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if (reserve_mem == NULL) |
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return; |
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free(reserve_mem); |
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reserve_mem = NULL; |
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} |
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|
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command(prompt) /* get/execute command */ |
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char *prompt; |
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{ |
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xsiz = (((pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
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ysiz = (((pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
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rl = (RECT *)malloc(xsiz*sizeof(RECT)); |
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if (rl == NULL) |
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return; |
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pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
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if (rl == NULL || pl == NULL) |
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error(SYSTEM, "out of memory in rsample"); |
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if (pl == NULL) |
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return; |
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/* |
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* Initialize the bottom row. |
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*/ |
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if (p->kid == NULL) { /* subdivide */ |
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if ((p->kid = newptree()) == NULL) |
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error(SYSTEM, "out of memory in refine"); |
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return(growth); |
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/* |
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* The following paint order can leave a black pixel |
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* when redraw() is called in (*dev->paintr)(). |