| 1 |
gregl |
3.1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
| 2 |
|
|
|
| 3 |
|
|
/* SCCSid "$SunId$ SGI" */ |
| 4 |
|
|
|
| 5 |
|
|
/* |
| 6 |
|
|
* Quadtree data structures for holodeck display drivers. |
| 7 |
|
|
*/ |
| 8 |
|
|
|
| 9 |
|
|
#include "tonemap.h" |
| 10 |
|
|
#include "rhdriver.h" |
| 11 |
|
|
/* quantity of leaves to free at a time */ |
| 12 |
|
|
#ifndef LFREEPCT |
| 13 |
|
|
#define LFREEPCT 15 |
| 14 |
|
|
#endif |
| 15 |
|
|
/* child ordering */ |
| 16 |
|
|
#define DL 0 /* down left */ |
| 17 |
|
|
#define DR 1 /* down right */ |
| 18 |
|
|
#define UL 2 /* up left */ |
| 19 |
|
|
#define UR 3 /* up right */ |
| 20 |
|
|
|
| 21 |
gregl |
3.3 |
#define BRF(i) (0x1<<(i)) /* branch flag bit */ |
| 22 |
|
|
#define LFF(i) (0x10<<(i)) /* leaf flag bit */ |
| 23 |
|
|
#define CHF(i) (0x100<<(i)) /* change flag bit */ |
| 24 |
|
|
#define CHBRF(i) (0x101<<(i)) /* changed branch bit */ |
| 25 |
|
|
#define CHLFF(i) (0x110<<(i)) /* changed leaf bit */ |
| 26 |
|
|
#define BR_ANY 0xf /* flags for any branches */ |
| 27 |
|
|
#define LF_ANY 0xf0 /* flags for any leaves */ |
| 28 |
|
|
#define CH_ANY 0xf00 /* flags for any change */ |
| 29 |
gregl |
3.1 |
|
| 30 |
|
|
typedef struct rtree { |
| 31 |
gregl |
3.3 |
short flgs; /* content flags (defined above) */ |
| 32 |
gregl |
3.1 |
union { |
| 33 |
|
|
struct rtree *b; /* if branch */ |
| 34 |
gregl |
3.3 |
int li; /* if leaf */ |
| 35 |
gregl |
3.1 |
} k[4]; /* children */ |
| 36 |
|
|
} RTREE; |
| 37 |
|
|
|
| 38 |
gregl |
3.3 |
extern struct rleaves { |
| 39 |
|
|
float (*wp)[3]; /* world intersection point array */ |
| 40 |
|
|
TMbright *brt; /* encoded brightness array */ |
| 41 |
|
|
BYTE (*chr)[3]; /* encoded chrominance array */ |
| 42 |
|
|
BYTE (*rgb)[3]; /* tone-mapped color array */ |
| 43 |
|
|
int nl; /* count of leaves in our pile */ |
| 44 |
|
|
int bl, tl; /* bottom and top (next) leaf index */ |
| 45 |
|
|
int tml; /* next leaf needing tone-mapping */ |
| 46 |
|
|
char *base; /* base of allocated memory */ |
| 47 |
|
|
} qtL; /* our pile of leaves */ |
| 48 |
|
|
|
| 49 |
gregl |
3.1 |
extern RTREE qtrunk; /* trunk of quadtree */ |
| 50 |
|
|
extern double qtDepthEps; /* epsilon to compare depths (z fraction) */ |
| 51 |
|
|
extern int qtMinNodesiz; /* minimum node dimension (pixels) */ |
| 52 |
gregl |
3.2 |
|
| 53 |
gregl |
3.1 |
|
| 54 |
|
|
/************************************************************************ |
| 55 |
|
|
* These driver support routines implement the dev_value() call, but |
| 56 |
|
|
* require the following callbacks: |
| 57 |
|
|
|
| 58 |
|
|
dev_paintr(rgb, x0, y0, x1, y1) : paint a rectangle |
| 59 |
|
|
BYTE rgb[3]; : rectangle color |
| 60 |
|
|
int x0, y0, x1, y1; : rectangle boundaries |
| 61 |
|
|
|
| 62 |
|
|
Draws an open rectangle between [x0,x1) and [y0,y1) with the color rgb. |
| 63 |
|
|
This function is called many times by qtUpdate(), qtRedraw() and qtReplant(). |
| 64 |
|
|
|
| 65 |
|
|
************************************************************************/ |
