-// This code written in 2010 by Forest Hale (lordhavoc ghdigital com), and placed into public domain.
+// This code written in 2010 by Ashley Rose Hale (LadyHavoc) (darkplacesengine gmail com), and placed into public domain.
// Based on information in http://zach.in.tu-clausthal.de/papers/vrst02.html (in particular vrst02_boxtree.pdf)
#ifndef BIH_H
#define BIH_H
+#define BIH_MAXUNORDEREDCHILDREN 8
+
typedef enum biherror_e
{
BIHERROR_OK, // no error, be happy
- BIHERROR_OUT_OF_NODES, // could not produce complete hierarchy, maxnodes too low (should be roughly half of numleafs)
+ BIHERROR_OUT_OF_NODES // could not produce complete hierarchy, maxnodes too low (should be roughly half of numleafs)
}
biherror_t;
BIH_SPLITX = 0,
BIH_SPLITY = 1,
BIH_SPLITZ = 2,
- BIH_LEAF = 3,
+ BIH_UNORDERED = 3,
}
bih_nodetype_t;
+typedef enum bih_leaftype_e
+{
+ BIH_BRUSH = 4,
+ BIH_COLLISIONTRIANGLE = 5,
+ BIH_RENDERTRIANGLE = 6
+}
+bih_leaftype_t;
+
typedef struct bih_node_s
{
bih_nodetype_t type; // = BIH_SPLITX and similar values
// TODO: move bounds data to parent node and remove it from leafs?
float mins[3];
float maxs[3];
- // < 0 is a leaf index (-1-leafindex), >= 0 is another node index (always >= this node's index)
+ // node indexes of children (always > this node's index)
int front;
int back;
// interval of children
float frontmin; // children[0]
float backmax; // children[1]
+ // BIH_UNORDERED uses this for a list of leafindex (all >= 0), -1 = end of list
+ int children[BIH_MAXUNORDEREDCHILDREN];
}
bih_node_t;
typedef struct bih_leaf_s
{
- bih_nodetype_t type; // = BIH_LEAF
+ bih_leaftype_t type; // = BIH_BRUSH And similar values
float mins[3];
float maxs[3];
// data past this point is generic and entirely up to the caller...
int textureindex;
+ int surfaceindex;
int itemindex; // triangle or brush index
}
bih_leaf_t;
int BIH_Build(bih_t *bih, int numleafs, bih_leaf_t *leafs, int maxnodes, bih_node_t *nodes, int *temp_leafsort, int *temp_leafsortscratch);
+int BIH_GetTriangleListForBox(const bih_t *bih, int maxtriangles, int *trianglelist_idx, int *trianglelist_surf, const float *mins, const float *maxs);
+
#endif