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/* Copyright (c) 1995 Regents of the University of California */ |
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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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char *modname = m->oargs.sarg[foreground ? 0 : 1]; |
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if (!strcmp(modname, VOIDID)) |
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omod = OVOID; |
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else if ((omod = modifier(modname)) == OVOID) { |
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else if ((omod = lastmod(objndx(m), modname)) == OVOID) { |
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sprintf(errmsg, "undefined modifier \"%s\"", modname); |
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objerror(m, USER, errmsg); |
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} |
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/* compute vectors */ |
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fcross(DxR, D, R); |
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fcross(t->right, DxR, D); |
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d = DOT(D,D)/DOT(t->right,t->right); |
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d = DOT(t->right,t->right); |
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if (d <= FTINY*FTINY*FTINY*FTINY) |
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objerror(tm, USER, "illegal motion vector"); |
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d = DOT(D,D)/d; |
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for (i = 0; i < 3; i++) |
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t->right[i] *= d; |
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fcross(t->down, R, DxR); |
