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extern struct driver { |
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char *name; /* holodeck name or title */ |
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VIEW v; /* preferred view parameters */ |
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int hres, vres; /* device resolution */ |
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VIEW v; /* base view parameters */ |
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int hres, vres; /* base view resolution */ |
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int ifd; /* input file descriptor (for select) */ |
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} odev; /* our open device */ |
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|
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/* dev_input() return flags */ |
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#define DEV_SHUTDOWN 01 /* user shutdown request */ |
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#define DEV_NEWVIEW 02 /* view change (new view in odev.v) */ |
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#define DEV_NEWSIZE 04 /* device resolution change */ |
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#define DEV_WAIT 010 /* pause computation and wait for input */ |
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#define DEV_RESUME 020 /* resume after pause */ |
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#define DEV_REDRAW 040 /* redraw from server */ |
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#define DEV_PUTVIEW 0100 /* print out current view */ |
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#define DEV_LASTVIEW 0200 /* restore previous view */ |
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extern int imm_mode; /* bundles are being delivered immediately */ |
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|
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/* user commands */ |
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#define DC_SETVIEW 0 /* set the base view */ |
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#define DC_GETVIEW 1 /* print the current base view */ |
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#define DC_LASTVIEW 2 /* restore previous view */ |
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#define DC_PAUSE 3 /* pause the current calculation */ |
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#define DC_RESUME 4 /* resume the calculation */ |
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#define DC_REDRAW 5 /* redraw from server */ |
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#define DC_KILL 6 /* kill rtrace process(es) */ |
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#define DC_RESTART 7 /* restart rtrace process(es) */ |
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#define DC_CLOBBER 8 /* clobber holodeck file */ |
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#define DC_QUIT 9 /* quit the program */ |
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|
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#define DC_NCMDS 10 /* number of commands */ |
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|
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/* dev_input() returns flags from above */ |
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#define DFL(dc) (1<<(dc)) |
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|
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#define CTRL(c) ((c)-'@') |
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/* commands entered in display window */ |
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#define DV_INIT {'\0','v','l','p','\r',CTRL('L'),'K','R','C','q'} |
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/* commands entered on stdin */ |
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#define DC_INIT {"VIEW=","where","last","pause","resume","redraw",\ |
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"kill","restart","clobber","quit"} |
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|
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|
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/************************************************************************ |
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* Driver routines (all are required): |
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|
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char *nm; : appropriate title bar annotation |
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|
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Sets fields of odev structure and prepares the display for i/o. |
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The view type, horizontal and vertical view angles and other default |
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< |
parameters in odev.v should also be assigned. |
54 |
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The base view type, horizontal and vertical view angles and other |
55 |
> |
default parameters in odev.v should also be assigned. |
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|
57 |
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|
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int |
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dev_view(nv) : set display view parameters |
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dev_view(nv) : set base view parameters |
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VIEW *nv; : the new view |
61 |
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|
62 |
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Updates the display for the given view change. |
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Updates the display for the given base view change. |
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Look for nv==&odev.v when making view current after dev_input() |
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returns DEV_NEWVIEW flag. Return 1 on success, or 0 if the |
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new view would conflict with device requirements. In the latter |
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69 |
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|
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void |
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dev_clear() : clear device memory |
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|
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Clear the device memory in preparation for fresh data. Clearing |
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the screen is optional. |
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|
76 |
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|
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void |
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dev_value(c, p, v) : register new point of light |
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COLR c; : pixel color (RGBE) |
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FVECT p; : world intersection point |
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FVECT v; : ray direction vector |
82 |
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|
83 |
< |
Add the given color point to the display output queue. |
83 |
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Add the given color point to the display output queue. If imm_mode is |
84 |
> |
non-zero, then values are being sent in rapid succession. |
85 |
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|
86 |
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|
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int |
96 |
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|
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Called when odev struct file descriptor shows input is ready. |
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Returns flags indicating actions to take in the control process. |
99 |
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If the DEV_NEWVIEW or DEV_NEWSIZE flag is returned, the odev |
99 |
> |
If the DC_VIEW or DC_RESIZE flag is returned, the odev |
100 |
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structure must be updated beforehand. |
101 |
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|
102 |
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|
103 |
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VIEW * |
104 |
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dev_auxview(n, hv) : return nth auxiliary view |
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int n; : auxiliary view number |
106 |
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int hv[2]; : returned horiz. and vert. image resolution |
107 |
+ |
|
108 |
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Return the nth auxiliary view associated with the current base view. |
109 |
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The hv entries are assigned the horizontal and vertical view resolution, |
110 |
+ |
respectively. Function returns NULL if there are no more auxiliary |
111 |
+ |
views. The zeroeth auxiliary view is the base view itself. |
112 |
+ |
|
113 |
+ |
|
114 |
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void |
115 |
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dev_close() : close the display |
116 |
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|
119 |
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|
120 |
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|
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************************************************************************/ |
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|
123 |
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|
124 |
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extern VIEW *dev_auxview(); |