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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ SGI" */ |
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/* RCSid: $Id$ */ |
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/* |
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* Header file for object display routines for rholo drivers. |
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*/ |
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#define DO_NCMDS 10 /* number of object display commands */ |
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/* commands entered on stdin only */ |
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#define DO_INIT {"load","unload","xform","move","unmove","dup",\ |
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#define DO_INIT {"load","clear","xform","move","unmove","dup",\ |
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"show","light","hide","object"} |
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/******************************************************************* |
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dobj_command(cmd, args) : check/run object display command |
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char *cmd, *args; : command name and argument string |
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Check to see if this is an object display command, and return the command |
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number after running it if it is, or -1 if it isn't. Error messages should |
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Check to see if this is an object display command, and return -1 if |
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it isn't. If it is a valid command that results in some visible |
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change, return non-zero, otherwise return 0. Error messages should |
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be printed with error(COMMAND,err). |
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double |
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dobj_trace(rorg, rdir) : check for ray intersection with objects |
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dobj_trace(nm, rorg, rdir) : check for ray intersection with objects |
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char nm[]; : object name (modified) |
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FVECT rorg, rdir; : ray origin and direction |
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Check to see if the given ray intersects any of the visible objects, |
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Check to see if the given ray intersects the given object, |
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returning the distance the ray traveled if it did, or FHUGE if it didn't. |
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If nm contains "*", then all visible objects are checked and the name |
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of the intersected object is returned, or "" if none. If nm is NULL, |
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then all visible objects are checked, but the name is not returned. |
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void |
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int |
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dobj_render() : render visible objects to OpenGL |
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Renders all display objects using OpenGL, assuming desired view has |
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been set. This routine also assumes that the tone-mapping library |
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is being used to set exposure, and it queries this information to |
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adjust light sources as necessary for illuminated objects. |
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adjust light sources as necessary for illuminated objects. Returns |
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the number of objects rendered. |
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void |
