shithub: asif

ref: 3dc9559c9770afbc525a7e1d5eb24f7b25567904
dir: /app/path/map.c/

#include <u.h>
#include <libc.h>
#include "asif.h"
#include "path.h"
#include "dat.h"
#include "fns.h"

int movemode;
int	(*pathfn)(Node*, Node*);

static int gotscen;

Vertex
n2s(Node *n)
{
	Vertex v;

	v = n2p(n);
	v.x = v.x * Nodesz + 1;
	v.y = v.y * Nodesz + 1;
	return v;
}

int
setparm(int mmode, int alg, int dist)
{
	switch(mmode){
	case Move8: /* wet floor */
	case Move4: movemode = mmode; break;
	default: sysfatal("setparm: unknown move mode %d", mmode);
	}
	switch(alg){
	case Pa∗: pathfn = a∗findpath; break;
	case Pbfs: pathfn = bfsfindpath; break;
	case Pdijkstra: pathfn = dijkstrafindpath; break;
	default: sysfatal("setparm: unknown algo type %d", alg);
	}
	switch(dist){
	case Deuclid: distfn = eucdist; break;
	case Dmanhattan: distfn = manhdist; break;
	case Doctile: distfn = octdist; break;
	default: sysfatal("setparm: unknown distance function %d", dist);
	}
	clearmap();
	return 0;
}

void
clearmap(void)
{
	start = goal = nil;
	if(grid == nil || gotscen)
		return;
	cleargrid();
}

static void
defaults(Vertex v)
{
	initgrid(v.x, v.y);
	setparm(Move8, Pa∗, Doctile);
}

int
initmap(char *scen, Vertex v, int m, int a, int d)
{
	if(scen == nil){
		defaults(v);
		return 0;
	}
	if(readscen(scen, &v, &m, &a, &d) < 0)
		sysfatal("readscen: %r");
	gotscen = 1;
	setparm(m, a, d);
	return 0;
}