mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-11-26 05:51:20 +00:00
94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
#ifndef __P_BLOCKMAP_H
|
|
#define __P_BLOCKMAP_H
|
|
|
|
#include "doomtype.h"
|
|
|
|
class AActor;
|
|
|
|
// [RH] Like msecnode_t, but for the blockmap
|
|
struct FBlockNode
|
|
{
|
|
AActor *Me; // actor this node references
|
|
int BlockIndex; // index into blocklinks for the block this node is in
|
|
int Group; // portal group this link belongs to (can be different than the actor's own group
|
|
FBlockNode **PrevActor; // previous actor in this block
|
|
FBlockNode *NextActor; // next actor in this block
|
|
FBlockNode **PrevBlock; // previous block this actor is in
|
|
FBlockNode *NextBlock; // next block this actor is in
|
|
|
|
static FBlockNode *Create (AActor *who, int x, int y, int group = -1);
|
|
void Release ();
|
|
|
|
static FBlockNode *FreeBlocks;
|
|
};
|
|
|
|
// BLOCKMAP
|
|
// Created from axis aligned bounding box
|
|
// of the map, a rectangular array of
|
|
// blocks of size 128x128.
|
|
// Used to speed up collision detection
|
|
// by spatial subdivision in 2D.
|
|
//
|
|
|
|
struct FBlockmap
|
|
{
|
|
int* blockmaplump; // offsets in blockmap are from here
|
|
|
|
int* blockmap;
|
|
int bmapwidth;
|
|
int bmapheight; // in mapblocks
|
|
double bmaporgx;
|
|
double bmaporgy; // origin of block map
|
|
FBlockNode** blocklinks; // for thing chains
|
|
|
|
// mapblocks are used to check movement
|
|
// against lines and things
|
|
enum
|
|
{
|
|
MAPBLOCKUNITS = 128
|
|
};
|
|
|
|
inline int GetBlockX(double xpos)
|
|
{
|
|
return int((xpos - bmaporgx) / MAPBLOCKUNITS);
|
|
}
|
|
|
|
inline int GetBlockY(double ypos)
|
|
{
|
|
return int((ypos - bmaporgy) / MAPBLOCKUNITS);
|
|
}
|
|
|
|
inline bool isValidBlock(int x, int y) const
|
|
{
|
|
return ((unsigned int)x < (unsigned int)bmapwidth &&
|
|
(unsigned int)y < (unsigned int)bmapheight);
|
|
}
|
|
|
|
inline int *GetLines(int x, int y) const
|
|
{
|
|
// There is an extra entry at the beginning of every block.
|
|
// Apparently, id had originally intended for it to be used
|
|
// to keep track of things, but the final code does not do that.
|
|
int offset = y*bmapwidth + x;
|
|
return blockmaplump + *(blockmap + offset) + 1;
|
|
}
|
|
|
|
bool VerifyBlockMap(int count, unsigned numlines);
|
|
|
|
void Clear()
|
|
{
|
|
if (blockmaplump != NULL)
|
|
{
|
|
delete[] blockmaplump;
|
|
blockmaplump = NULL;
|
|
}
|
|
if (blocklinks != NULL)
|
|
{
|
|
delete[] blocklinks;
|
|
blocklinks = NULL;
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
#endif
|