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Improved random map generation.

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This commit is contained in:
Felix Ableitner 2013-04-18 10:05:17 +02:00
parent 59b6885b15
commit ef3553f74e
3 changed files with 43 additions and 36 deletions
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2
source/Game.cpp
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@ -27,7 +27,7 @@ Game::Game(sf::RenderWindow& window) :
mWindow.setKeyRepeatEnabled(true);
Generator generator;
generator.generateTiles(mTileManager, sf::IntRect(-20, -20, 40, 40));
generator.generateTiles(mTileManager, sf::IntRect(-16, -16, 32, 32));
mPlayer = std::shared_ptr<Player>(new Player(mWorld, mTileManager,
sf::Vector2f(0.0f, 0.0f), Yaml("player.yaml")));
mWorld.insertCharacter(mPlayer);

69
source/generator/Generator.cpp
View file

@ -7,10 +7,12 @@
#include "Generator.h"
#include <assert.h>
#include <bitset>
#include "simplexnoise.h"
#include "../sprites/TileManager.h"
#include "../util/Log.h"
/// For usage with simplexnoise.h
uint8_t perm[512];
@ -33,23 +35,27 @@ Generator::Generator() {
* True means wall, false means floor.
*
* @param tm TileManager instance to set tiles in.
* @param area Size and position of area to generate tiles for.
* @param area Size and position of area to generate tiles for. Must be
* power of two.
*/
void
Generator::generateTiles(TileManager& tm, const sf::IntRect& area) const {
// Check if width and height are power of two.
assert(area.width && !(area.width & (area.width - 1)));
assert(area.height && !(area.height & (area.height - 1)));
std::vector<std::vector<bool> >
noise(area.width, std::vector<bool>(area.height));
std::vector<std::vector<bool> >
filtered(area.width, std::vector<bool>(area.height, false));
for (int x = area.left; x < area.left+area.width; x++) {
for (int y = area.top; y < area.top+area.height; y++) {
for (int x = area.left; x < area.left + area.width; x++) {
for (int y = area.top; y < area.top + area.height; y++) {
noise[x-area.left][y-area.top] =
(scaled_octave_noise_2d(2, 2, 0.0015f, 0.5f, -0.5f, x, y) +
scaled_octave_noise_2d(3, 3, 0.01f, -1, 1, x, y)) < 0.05f;
}
}
for (int x = 0; x < (int) noise.size(); x+=5) {
for (int y = 0; y < (int) noise[x].size(); y+=5) {
filterWalls(noise, filtered, x, y, 10, 5, 0);
@ -57,12 +63,11 @@ Generator::generateTiles(TileManager& tm, const sf::IntRect& area) const {
filterWalls(noise, filtered, x, y, 50, 5, 20);
}
}
for (int x = area.left; x < area.left+area.width; x++) {
for (int y = area.top; y < area.top+area.height; y++) {
tm.insertTile(TileManager::TilePosition(x, y),
for (int x = area.left; x < area.left + area.width; x++) {
for (int y = area.top; y < area.top + area.height; y++) {
(filtered[x-area.left][y-area.top])
? TileManager::Type::WALL : TileManager::Type::FLOOR);
? tm.insertTile(TileManager::TilePosition(x, y), TileManager::Type::WALL)
: tm.insertTile(TileManager::TilePosition(x, y), TileManager::Type::FLOOR);
}
}
}
@ -87,12 +92,27 @@ Generator::fill(std::vector<std::vector<bool> >& image,
}
/**
* Finds rectangles of specific size in in and puts them into out.
* Returns the number of walls (fields with value true) in the area in tiles.
*
* True means wall, false means floor.
* @param area The area to count in.
* @param tiles Array of tile values (walls).
*/
int Generator::countWalls(const sf::IntRect& area,
std::vector<std::vector<bool> >& tiles) {
int count = 0;
for (int x = area.left; x < area.left + area.width; x++) {
for (int y = area.top; y < area.top + area.height; y++)
count += (int) tiles[x][y];
}
return count;
}
/**
* Finds rectangles of specific size inside vector in and
* puts them into vector out.
*
* @param[in] in Rectangular map of walls.
* @param[out] out Rectangular map of walls.
* @param[in] in Rectangular map of tiles.
* @param[out] out Rectangular map of tiles.
* @param x Position to check from (top left corner for rectangle).
* @param y Position to check from (top left corner for rectangle).
* @param longside Length of the longer side of the rectangle.
@ -110,26 +130,11 @@ Generator::filterWalls(std::vector<std::vector<bool> >& in,
return;
// Filter in horizontal direction.
if (x % longside == 0 && y % shortside == 0) {
int count = 0;
for (int x2 = x; x2 < x + longside; x2++) {
for (int y2 = y; y2 < y + shortside; y2++) {
count += (int) in[x2][y2];
}
}
if (count >= shortside * longside - subtract)
if (countWalls(sf::IntRect(x, y, longside, shortside), in) >=
shortside * longside - subtract)
fill(out, sf::IntRect(x, y, longside, shortside), true);
}
// Filter in vertical direction.
if (x % shortside == 0 && y % longside == 0) {
int count = 0;
for (int x2 = x; x2 < x + shortside; x2++) {
for (int y2 = y; y2 < y + longside; y2++)
count += (int) in[x2][y2];
}
if (count >= shortside * longside - subtract)
if (countWalls(sf::IntRect(x, y, shortside, longside), in) >=
shortside * longside - subtract)
fill(out, sf::IntRect(x, y, shortside, longside), true);
}
}

2
source/generator/Generator.h
View file

@ -25,6 +25,8 @@ private:
static void filterWalls(std::vector<std::vector<bool> >& in,
std::vector<std::vector<bool> >& out,
int x, int y, int longside, int shortside, int subtract);
static int countWalls(const sf::IntRect& area,
std::vector<std::vector<bool> >& tiles);
};
#endif /* DG_GENERATOR_H_ */