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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* cone.c - routines for making cones |
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* |
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* 2/12/86 |
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*/ |
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#include "copyright.h" |
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#include "standard.h" |
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#include "object.h" |
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co->ca = o->oargs.farg; |
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/* get radii */ |
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if (o->otype == OBJ_CYLINDER | o->otype == OBJ_TUBE) { |
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if ((o->otype == OBJ_CYLINDER) | (o->otype == OBJ_TUBE)) { |
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if (o->oargs.nfargs != 7) |
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goto argcerr; |
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if (co->ca[6] < -FTINY) { |
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else sgn1 = 0; |
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if (sgn0+sgn1 == 0) |
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goto raderr; |
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if (sgn0 < 0 | sgn1 < 0) { |
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if ((sgn0 < 0) | (sgn1 < 0)) { |
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objerror(o, o->otype==OBJ_RING?USER:WARNING, |
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"negative radii"); |
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o->otype = o->otype == OBJ_CONE ? |
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if (o->otype == OBJ_RING) { |
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co->al = 0.0; |
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co->sl = CO_R1(co) - CO_R0(co); |
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} else if (o->otype == OBJ_CONE | o->otype == OBJ_CUP) { |
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} else if ((o->otype == OBJ_CONE) | (o->otype == OBJ_CUP)) { |
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co->sl = co->ca[7] - co->ca[6]; |
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co->sl = sqrt(co->sl*co->sl + co->al*co->al); |
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} else { /* OBJ_CYLINDER or OBJ_TUBE */ |
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objerror(o, USER, "bad # arguments"); |
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raderr: |
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objerror(o, USER, "illegal radii"); |
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return NULL; /* pro forma return */ |
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} |
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void |
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freecone(o) /* free memory associated with cone */ |
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OBJREC *o; |
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{ |
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if (co == NULL) |
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return; |
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if (co->tm != NULL) |
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free((char *)co->tm); |
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free((char *)co); |
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free((void *)co->tm); |
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free((void *)co); |
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o->os = NULL; |
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} |
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void |
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conexform(co) /* get cone transformation matrix */ |
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register CONE *co; |
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{ |
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register double d; |
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register int i; |
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co->tm = (FLOAT (*)[4])malloc(sizeof(MAT4)); |
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co->tm = (RREAL (*)[4])malloc(sizeof(MAT4)); |
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if (co->tm == NULL) |
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error(SYSTEM, "out of memory in conexform"); |
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multmat4(co->tm, co->tm, m4); |
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/* scale z-axis */ |
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if (co->p0 != co->p1 & co->r0 != co->r1) { |
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if ((co->p0 != co->p1) & (co->r0 != co->r1)) { |
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setident4(m4); |
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m4[2][2] = (CO_R1(co) - CO_R0(co)) / co->al; |
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multmat4(co->tm, co->tm, m4); |