| 1428 |
|
static int bsdfPhotonScatter (OBJREC *mat, RAY *rayIn) |
| 1429 |
|
/* Generate new photon ray for BSDF modifier and recurse. */ |
| 1430 |
|
{ |
| 1431 |
+ |
int hasthick = (mat->otype == MAT_BSDF); |
| 1432 |
|
int hitFront; |
| 1433 |
|
SDError err; |
| 1434 |
|
SDValue bsdfVal; |
| 1444 |
|
|
| 1445 |
|
/* Following code adapted from m_bsdf() */ |
| 1446 |
|
/* Check arguments */ |
| 1447 |
< |
if (mat -> oargs.nsargs < 6 || mat -> oargs.nfargs > 9 || |
| 1447 |
> |
if (mat -> oargs.nsargs < hasthick+5 || mat -> oargs.nfargs > 9 || |
| 1448 |
|
mat -> oargs.nfargs % 3) |
| 1449 |
|
objerror(mat, USER, "bad # arguments"); |
| 1450 |
|
|
| 1451 |
< |
hitFront = (rayIn -> rod > 0); |
| 1451 |
> |
hitFront = (rayIn -> rod > 0); |
| 1452 |
|
|
| 1453 |
< |
/* Load cal file */ |
| 1454 |
< |
mf = getfunc(mat, 5, 0x1d, 1); |
| 1455 |
< |
|
| 1456 |
< |
/* Get thickness */ |
| 1453 |
> |
/* Load cal file */ |
| 1454 |
> |
mf = hasthick ? getfunc(mat, 5, 0x1d, 1) : getfunc(mat, 4, 0xe, 1); |
| 1455 |
> |
|
| 1456 |
> |
/* Get thickness */ |
| 1457 |
> |
nd.thick = 0; |
| 1458 |
> |
if (hasthick) { |
| 1459 |
|
nd.thick = evalue(mf -> ep [0]); |
| 1460 |
|
if ((-FTINY <= nd.thick) & (nd.thick <= FTINY)) |
| 1461 |
|
nd.thick = .0; |
| 1462 |
+ |
} |
| 1463 |
|
|
| 1464 |
|
/* Get BSDF data */ |
| 1465 |
< |
nd.sd = loadBSDF(mat -> oargs.sarg [1]); |
| 1465 |
> |
nd.sd = loadBSDF(mat -> oargs.sarg [hasthick]); |
| 1466 |
|
|
| 1467 |
|
/* Extra diffuse reflectance from material def */ |
| 1468 |
|
if (hitFront) { |
| 1483 |
|
else setcolor(nd.rdiff, mat -> oargs.farg [3], mat -> oargs.farg [4], |
| 1484 |
|
mat -> oargs.farg [5]); |
| 1485 |
|
|
| 1486 |
< |
/* Extra diffuse transmittance from material def */ |
| 1487 |
< |
if (mat -> oargs.nfargs < 9) |
| 1488 |
< |
setcolor(nd.tdiff, .0, .0, .0); |
| 1486 |
> |
/* Extra diffuse transmittance from material def */ |
| 1487 |
> |
if (mat -> oargs.nfargs < 9) |
| 1488 |
> |
setcolor(nd.tdiff, .0, .0, .0); |
| 1489 |
|
else setcolor(nd.tdiff, mat -> oargs.farg [6], mat -> oargs.farg [7], |
| 1490 |
|
mat -> oargs.farg [8]); |
| 1491 |
|
|
| 1492 |
|
nd.mp = mat; |
| 1493 |
|
nd.pr = rayIn; |
| 1494 |
< |
|
| 1494 |
> |
|
| 1495 |
|
/* Get modifiers */ |
| 1496 |
|
raytexture(rayIn, mat -> omod); |
| 1497 |
|
|
| 1498 |
|
/* Modify diffuse values */ |
| 1499 |
|
multcolor(nd.rdiff, rayIn -> pcol); |
| 1500 |
|
multcolor(nd.tdiff, rayIn -> pcol); |
| 1501 |
< |
|
| 1501 |
> |
|
| 1502 |
|
/* Get up vector & xform to world coords */ |
| 1503 |
< |
upvec [0] = evalue(mf -> ep [1]); |
| 1504 |
< |
upvec [1] = evalue(mf -> ep [2]); |
| 1505 |
< |
upvec [2] = evalue(mf -> ep [3]); |
| 1503 |
> |
upvec [0] = evalue(mf -> ep [hasthick+0]); |
| 1504 |
> |
upvec [1] = evalue(mf -> ep [hasthick+1]); |
| 1505 |
> |
upvec [2] = evalue(mf -> ep [hasthick+2]); |
| 1506 |
|
|
| 1507 |
|
if (mf -> fxp != &unitxf) { |
| 1508 |
|
multv3(upvec, upvec, mf -> fxp -> xfm); |
| 1545 |
|
nd.sr_vpsa [1] = sqrt(nd.sr_vpsa [1]); |
| 1546 |
|
|
| 1547 |
|
/* Orient perturbed normal towards incident side */ |
| 1548 |
< |
if (!hitFront) { |
| 1548 |
> |
if (!hitFront) { |
| 1549 |
|
nd.pnorm [0] = -nd.pnorm [0]; |
| 1550 |
|
nd.pnorm [1] = -nd.pnorm [1]; |
| 1551 |
|
nd.pnorm [2] = -nd.pnorm [2]; |
| 1589 |
|
|
| 1590 |
|
else if ((xi -= ptDiff) <= 0) { |
| 1591 |
|
/* Diffuse transmission (extra component in material def) */ |
| 1588 |
– |
flipsurface(rayIn); |
| 1589 |
– |
nd.thick = -nd.thick; |
| 1592 |
|
photonRay(rayIn, &rayOut, PMAP_DIFFTRANS, nd.tdiff); |
| 1593 |
|
diffPhotonScatter(nd.pnorm, &rayOut); |
| 1594 |
|
transmitted = 1; |
| 1617 |
|
ccy2rgb(&bsdfVal.spec, bsdfVal.cieY, bsdfRGB); |
| 1618 |
|
multcolor(bsdfRGB, rayIn -> pcol); |
| 1619 |
|
addcolor(bsdfRGB, nd.tdiff); |
| 1618 |
– |
flipsurface(rayIn); /* Necessary? */ |
| 1619 |
– |
nd.thick = -nd.thick; |
| 1620 |
|
photonRay(rayIn, &rayOut, PMAP_DIFFTRANS, bsdfRGB); |
| 1621 |
|
transmitted = 1; |
| 1622 |
|
} |
| 1640 |
|
/* Apply pattern to spectral component */ |
| 1641 |
|
ccy2rgb(&bsdfVal.spec, bsdfVal.cieY, bsdfRGB); |
| 1642 |
|
multcolor(bsdfRGB, rayIn -> pcol); |
| 1643 |
– |
flipsurface(rayIn); /* Necessary? */ |
| 1644 |
– |
nd.thick = -nd.thick; |
| 1643 |
|
photonRay(rayIn, &rayOut, PMAP_SPECTRANS, bsdfRGB); |
| 1644 |
|
transmitted = 1; |
| 1645 |
|
} |
| 1654 |
|
/* Clean up */ |
| 1655 |
|
SDfreeCache(nd.sd); |
| 1656 |
|
|
| 1657 |
< |
/* Need to offset ray origin to get past detail geometry? */ |
| 1657 |
> |
/* Offset outgoing photon origin by thickness to bypass proxy geometry */ |
| 1658 |
|
if (transmitted && nd.thick != 0) |
| 1659 |
|
VSUM(rayOut.rorg, rayOut.rorg, rayIn -> ron, -nd.thick); |
| 1660 |
|
|
| 1707 |
|
photonScatter [TEX_DATA] = pattexPhotonScatter; |
| 1708 |
|
|
| 1709 |
|
photonScatter [MOD_ALIAS] = aliasPhotonScatter; |
| 1710 |
< |
photonScatter [MAT_BSDF] = bsdfPhotonScatter; |
| 1710 |
> |
photonScatter [MAT_BSDF] = |
| 1711 |
> |
photonScatter [MAT_ABSDF] = bsdfPhotonScatter; |
| 1712 |
|
} |
