/******************************************************************************\
Selects a terrain index for a tile depending on its region.
\******************************************************************************/
static int tile_terrain(int tile)
{
int i, j, base, base_num, trans, terrain, vert_terrain[3], offset;
base = R_terrain_base(r_tiles[tile].terrain);
if (base >= R_T_BASES - 1)
return r_tiles[tile].terrain;
/* If we are not using transition tiles, just return the base */
if (!r_globe_transitions.value.n)
return base;
/* Each tile vertex can only have up to two base terrains on it, we
need to find out if the dominant one is present */
base_num = 0;
for (i = 0; i < 3; i++) {
j = r_globe_verts[3 * tile + i].next;
vert_terrain[i] = base;
while (j != 3 * tile + i) {
terrain = R_terrain_base(r_tiles[j / 3].terrain);
if (terrain > vert_terrain[i])
trans = vert_terrain[i] = terrain;
j = r_globe_verts[j].next;
}
if (vert_terrain[i] == base)
base_num++;
}
if (base_num > 2)
return r_tiles[tile].terrain;
/* Swap the base and single terrain if the base only appears once */
offset = 2 * base;
if (base_num == 1) {
trans = base;
offset++;
}
/* Find the lone terrain and assign the transition tile */
for (i = 0; i < 3; i++)
if (vert_terrain[i] == trans)
break;
/* Flipped tiles need reversing */
if (tile < flip_limit) {
if (i == 1)
i = 2;
else if (i == 2)
i = 1;
}
return R_T_TRANSITION + offset * 3 + i;
}
/******************************************************************************\
Place starter buildings.
\******************************************************************************/
static void initial_buildings(void)
{
int i;
for (i = 0; i < r_tiles_max; i++) {
if (R_terrain_base(r_tiles[i].terrain) != R_T_GROUND)
continue;
if (C_rand_real() < g_forest.value.f)
G_tile_build(i, G_BT_TREE, G_NN_NONE);
}
}