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* m_clip.c - routine for clipped (cut) objects. |
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*/ |
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|
|
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< |
/* ==================================================================== |
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< |
* The Radiance Software License, Version 1.0 |
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< |
* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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< |
* |
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* Redistribution and use in source and binary forms, with or without |
| 15 |
< |
* modification, are permitted provided that the following conditions |
| 16 |
< |
* are met: |
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< |
* |
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< |
* 1. Redistributions of source code must retain the above copyright |
| 19 |
< |
* notice, this list of conditions and the following disclaimer. |
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< |
* |
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< |
* 2. Redistributions in binary form must reproduce the above copyright |
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< |
* notice, this list of conditions and the following disclaimer in |
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< |
* the documentation and/or other materials provided with the |
| 24 |
< |
* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
| 28 |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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< |
* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
| 36 |
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* and "The Regents of the University of California" must |
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< |
* not be used to endorse or promote products derived from this |
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< |
* software without prior written permission. For written |
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< |
* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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< |
* permission of Lawrence Berkeley National Laboratory. |
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* |
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< |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| 46 |
< |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 47 |
< |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 48 |
< |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
| 49 |
< |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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< |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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< |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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< |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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< |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 55 |
< |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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< |
* SUCH DAMAGE. |
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< |
* ==================================================================== |
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* |
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< |
* This software consists of voluntary contributions made by many |
| 60 |
< |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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< |
* information on Lawrence Berkeley National Laboratory, please see |
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< |
* <http://www.lbl.gov/>. |
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< |
*/ |
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> |
#include "copyright.h" |
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|
|
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|
#include "ray.h" |
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+ |
#include "rtotypes.h" |
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|
|
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/* |
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* Clipping objects permit holes and sections to be taken out |
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|
|
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|
|
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|
int |
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< |
m_clip(m, r) /* clip objects from ray */ |
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< |
register OBJREC *m; |
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< |
register RAY *r; |
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> |
m_clip( /* clip objects from ray */ |
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> |
OBJREC *m, |
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> |
RAY *r |
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> |
) |
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|
{ |
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|
OBJECT cset[MAXSET+1], *modset; |
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|
OBJECT obj, mod; |
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int entering; |
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< |
register int i; |
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> |
int i; |
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|
|
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|
obj = objndx(m); |
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|
if ((modset = (OBJECT *)m->os) == NULL) { |
| 55 |
|
} |
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m->os = (char *)modset; |
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|
} |
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+ |
if (r == NULL) |
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+ |
return(0); /* just initializing */ |
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|
if (r->clipset != NULL) |
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setcopy(cset, r->clipset); |
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|
else |
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|
cset[0] = 0; |
| 64 |
|
|
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< |
entering = r->rod > 0.0; /* entering clipped region? */ |
| 65 |
> |
entering = (r->rod > 0.0); /* entering clipped region? */ |
| 66 |
|
|
| 67 |
< |
for (i = modset[0]; i > 0; i--) { |
| 67 |
> |
for (i = modset[0]; i > 0; i--) |
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|
if (entering) { |
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|
if (!inset(cset, modset[i])) { |
| 70 |
|
if (cset[0] >= MAXSET) |
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|
error(INTERNAL, "set overflow in m_clip"); |
| 72 |
|
insertelem(cset, modset[i]); |
| 73 |
|
} |
| 74 |
< |
} else { |
| 75 |
< |
if (inset(cset, modset[i])) |
| 76 |
< |
deletelem(cset, modset[i]); |
| 128 |
< |
} |
| 129 |
< |
} |
| 74 |
> |
} else if (inset(cset, modset[i])) |
| 75 |
> |
deletelem(cset, modset[i]); |
| 76 |
> |
|
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|
/* compute ray value */ |
| 78 |
|
r->newcset = cset; |
| 79 |
|
if (strcmp(m->oargs.sarg[0], VOIDID)) { |
| 80 |
|
int inside = 0; |
| 81 |
< |
register RAY *rp; |
| 81 |
> |
const RAY *rp; |
| 82 |
|
/* check for penetration */ |
| 83 |
|
for (rp = r; rp->parent != NULL; rp = rp->parent) |
| 84 |
|
if (!(rp->rtype & RAYREFL) && rp->parent->ro != NULL |
| 85 |
< |
&& inset(modset, rp->parent->ro->omod)) |
| 85 |
> |
&& inset(modset, rp->parent->ro->omod)) { |
| 86 |
|
if (rp->parent->rod > 0.0) |
| 87 |
|
inside++; |
| 88 |
|
else |
| 89 |
|
inside--; |
| 90 |
+ |
} |
| 91 |
|
if (inside > 0) { /* we just hit the object */ |
| 92 |
|
flipsurface(r); |
| 93 |
|
return(rayshade(r, lastmod(obj, m->oargs.sarg[0]))); |
