/** A small helper function to initialize the terrain */
static void TgenSetTileHeight(TileIndex tile, int height)
{
SetTileHeight(tile, height);
/* Only clear the tiles within the map area. */
if (IsInnerTile(tile)) {
MakeClear(tile, CLEAR_GRASS, 3);
}
}
/** A small helper function to initialize the terrain */
static void TgenSetTileHeight(TileIndex tile, int height)
{
SetTileHeight(tile, height);
/* Only clear the tiles within the map area. */
if (TileX(tile) != MapMaxX() && TileY(tile) != MapMaxY() &&
(!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0))) {
MakeClear(tile, CLEAR_GRASS, 3);
}
}
/**
* Converts a given grayscale map to something that fits in OTTD map system
* and create a map of that data.
* @param img_width the with of the image in pixels/tiles
* @param img_height the height of the image in pixels/tiles
* @param map the input map
*/
static void GrayscaleToMapHeights(uint img_width, uint img_height, byte *map)
{
/* Defines the detail of the aspect ratio (to avoid doubles) */
const uint num_div = 16384;
uint width, height;
uint row, col;
uint row_pad = 0, col_pad = 0;
uint img_scale;
uint img_row, img_col;
TileIndex tile;
/* Get map size and calculate scale and padding values */
switch (_settings_game.game_creation.heightmap_rotation) {
default: NOT_REACHED();
case HM_COUNTER_CLOCKWISE:
width = MapSizeX();
height = MapSizeY();
break;
case HM_CLOCKWISE:
width = MapSizeY();
height = MapSizeX();
break;
}
if ((img_width * num_div) / img_height > ((width * num_div) / height)) {
/* Image is wider than map - center vertically */
img_scale = (width * num_div) / img_width;
row_pad = (1 + height - ((img_height * img_scale) / num_div)) / 2;
} else {
/* Image is taller than map - center horizontally */
img_scale = (height * num_div) / img_height;
col_pad = (1 + width - ((img_width * img_scale) / num_div)) / 2;
}
if (_settings_game.construction.freeform_edges) {
for (uint x = 0; x < MapSizeX(); x++) MakeVoid(TileXY(x, 0));
for (uint y = 0; y < MapSizeY(); y++) MakeVoid(TileXY(0, y));
}
/* Form the landscape */
for (row = 0; row < height; row++) {
for (col = 0; col < width; col++) {
switch (_settings_game.game_creation.heightmap_rotation) {
default: NOT_REACHED();
case HM_COUNTER_CLOCKWISE: tile = TileXY(col, row); break;
case HM_CLOCKWISE: tile = TileXY(row, col); break;
}
/* Check if current tile is within the 1-pixel map edge or padding regions */
if ((!_settings_game.construction.freeform_edges && DistanceFromEdge(tile) <= 1) ||
(row < row_pad) || (row >= (height - row_pad - (_settings_game.construction.freeform_edges ? 0 : 1))) ||
(col < col_pad) || (col >= (width - col_pad - (_settings_game.construction.freeform_edges ? 0 : 1)))) {
SetTileHeight(tile, 0);
} else {
/* Use nearest neighbor resizing to scale map data.
* We rotate the map 45 degrees (counter)clockwise */
img_row = (((row - row_pad) * num_div) / img_scale);
switch (_settings_game.game_creation.heightmap_rotation) {
default: NOT_REACHED();
case HM_COUNTER_CLOCKWISE:
img_col = (((width - 1 - col - col_pad) * num_div) / img_scale);
break;
case HM_CLOCKWISE:
img_col = (((col - col_pad) * num_div) / img_scale);
break;
}
assert(img_row < img_height);
assert(img_col < img_width);
/* Colour scales from 0 to 255, OpenTTD height scales from 0 to 15 */
SetTileHeight(tile, map[img_row * img_width + img_col] / 16);
}
/* Only clear the tiles within the map area. */
if (TileX(tile) != MapMaxX() && TileY(tile) != MapMaxY() &&
(!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0))) {
MakeClear(tile, CLEAR_GRASS, 3);
}
}
}
}
static void TileLoop_Clear(TileIndex tile)
{
/* If the tile is at any edge flood it to prevent maps without water. */
if (_settings_game.construction.freeform_edges && DistanceFromEdge(tile) == 1) {
int z;
if (IsTileFlat(tile, &z) && z == 0) {
DoFloodTile(tile);
MarkTileDirtyByTile(tile);
return;
}
}
AmbientSoundEffect(tile);
switch (_settings_game.game_creation.landscape) {
case LT_TROPIC: TileLoopClearDesert(tile); break;
case LT_ARCTIC: TileLoopClearAlps(tile); break;
}
switch (GetClearGround(tile)) {
case CLEAR_GRASS:
if (GetClearDensity(tile) == 3) return;
if (_game_mode != GM_EDITOR) {
if (GetClearCounter(tile) < 7) {
AddClearCounter(tile, 1);
return;
} else {
SetClearCounter(tile, 0);
AddClearDensity(tile, 1);
}
} else {
SetClearGroundDensity(tile, GB(Random(), 0, 8) > 21 ? CLEAR_GRASS : CLEAR_ROUGH, 3);
}
break;
case CLEAR_FIELDS:
UpdateFences(tile);
if (_game_mode == GM_EDITOR) return;
if (GetClearCounter(tile) < 7) {
AddClearCounter(tile, 1);
return;
} else {
SetClearCounter(tile, 0);
}
if (GetIndustryIndexOfField(tile) == INVALID_INDUSTRY && GetFieldType(tile) >= 7) {
/* This farmfield is no longer farmfield, so make it grass again */
MakeClear(tile, CLEAR_GRASS, 2);
} else {
uint field_type = GetFieldType(tile);
field_type = (field_type < 8) ? field_type + 1 : 0;
SetFieldType(tile, field_type);
}
break;
default:
return;
}
MarkTileDirtyByTile(tile);
}
static void TileLoop_Trees(TileIndex tile)
{
if (GetTreeGround(tile) == TREE_GROUND_SHORE) {
TileLoop_Water(tile);
} else {
switch (_settings_game.game_creation.landscape) {
case LT_TROPIC: TileLoopTreesDesert(tile); break;
case LT_ARCTIC: TileLoopTreesAlps(tile); break;
}
}
TileLoopClearHelper(tile);
uint treeCounter = GetTreeCounter(tile);
/* Handle growth of grass (under trees/on MP_TREES tiles) at every 8th processings, like it's done for grass on MP_CLEAR tiles. */
if ((treeCounter & 7) == 7 && GetTreeGround(tile) == TREE_GROUND_GRASS) {
uint density = GetTreeDensity(tile);
if (density < 3) {
SetTreeGroundDensity(tile, TREE_GROUND_GRASS, density + 1);
MarkTileDirtyByTile(tile);
}
}
if (GetTreeCounter(tile) < 15) {
AddTreeCounter(tile, 1);
return;
}
SetTreeCounter(tile, 0);
switch (GetTreeGrowth(tile)) {
case 3: // regular sized tree
if (_settings_game.game_creation.landscape == LT_TROPIC &&
GetTreeType(tile) != TREE_CACTUS &&
GetTropicZone(tile) == TROPICZONE_DESERT) {
AddTreeGrowth(tile, 1);
} else {
switch (GB(Random(), 0, 3)) {
case 0: // start destructing
AddTreeGrowth(tile, 1);
break;
case 1: // add a tree
if (GetTreeCount(tile) < 4) {
AddTreeCount(tile, 1);
SetTreeGrowth(tile, 0);
break;
}
/* FALL THROUGH */
case 2: { // add a neighbouring tree
/* Don't plant extra trees if that's not allowed. */
if ((_settings_game.game_creation.landscape == LT_TROPIC && GetTropicZone(tile) == TROPICZONE_RAINFOREST) ?
_settings_game.construction.extra_tree_placement == ETP_NONE :
_settings_game.construction.extra_tree_placement != ETP_ALL) {
break;
}
TreeType treetype = GetTreeType(tile);
tile += TileOffsByDir((Direction)(Random() & 7));
/* Cacti don't spread */
if (!CanPlantTreesOnTile(tile, false)) return;
/* Don't plant trees, if ground was freshly cleared */
if (IsTileType(tile, MP_CLEAR) && GetClearGround(tile) == CLEAR_GRASS && GetClearDensity(tile) != 3) return;
PlantTreesOnTile(tile, treetype, 0, 0);
break;
}
default:
return;
}
}
break;
case 6: // final stage of tree destruction
if (GetTreeCount(tile) > 1) {
/* more than one tree, delete it */
AddTreeCount(tile, -1);
SetTreeGrowth(tile, 3);
} else {
/* just one tree, change type into MP_CLEAR */
switch (GetTreeGround(tile)) {
case TREE_GROUND_SHORE: MakeShore(tile); break;
case TREE_GROUND_GRASS: MakeClear(tile, CLEAR_GRASS, GetTreeDensity(tile)); break;
case TREE_GROUND_ROUGH: MakeClear(tile, CLEAR_ROUGH, 3); break;
case TREE_GROUND_ROUGH_SNOW: {
uint density = GetTreeDensity(tile);
MakeClear(tile, CLEAR_ROUGH, 3);
MakeSnow(tile, density);
break;
}
default: // snow or desert
if (_settings_game.game_creation.landscape == LT_TROPIC) {
MakeClear(tile, CLEAR_DESERT, GetTreeDensity(tile));
} else {
uint density = GetTreeDensity(tile);
MakeClear(tile, CLEAR_GRASS, 3);
MakeSnow(tile, density);
}
break;
}
}
break;
default:
AddTreeGrowth(tile, 1);
break;
}
MarkTileDirtyByTile(tile);
}
