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-rw-r--r--src/common.hpp114
-rw-r--r--src/game.cpp6
-rw-r--r--src/interface.cpp10
-rw-r--r--src/main.cpp9
-rw-r--r--src/procgen.cpp87
-rw-r--r--src/render.cpp8
-rw-r--r--src/world.cpp64
7 files changed, 244 insertions, 54 deletions
diff --git a/src/common.hpp b/src/common.hpp
index aaf1cad..2dd7c45 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -2,16 +2,37 @@
#include <cstdint>
#include <cmath>
#include <map>
+#include <unordered_set>
#include <SFML/Graphics.hpp>
-namespace game {
- class entity_t {
- virtual void render(sf::RenderWindow *window) = 0;
+namespace procgen {
+ class prng_t {
+ uint32_t state = 0;
+
+ public:
+ void seed(uint32_t seed);
+ uint32_t next(void);
+ float next_float(void);
+ void unit_vec(float out[2]);
+
+ };
+
+ class perlin_noise_t {
+ size_t size;
+ float (*table)[2] = nullptr;
+
+ float table_dot(size_t nx, size_t ny, float dx, float dy);
+
+ public:
+ ~perlin_noise_t();
+
+ void generate(prng_t *prng, size_t size);
+ float get(float x, float y, float scale);
};
}
namespace world {
- #define SECTOR_SIZE 16
+ #define SECTOR_SIZE 8
class tile_t {
public:
@@ -27,30 +48,59 @@ namespace world {
bool operator<(sector_index_t B) const;
};
+ class entity_t;
+
class sector_t {
- std::vector<game::entity_t*> entities;
public:
+ sf::FloatRect bounds;
+ std::unordered_set<entity_t*> ents;
+
bool empty = true;
tile_t tiles[SECTOR_SIZE * SECTOR_SIZE];
-
- void generate(sector_index_t index);
};
class world_t {
+ procgen::prng_t prng;
+ procgen::perlin_noise_t perlin;
std::map<sector_index_t, sector_t> sectors;
+ void generate(sector_t *sector, sector_index_t index);
+
public:
+ world_t(void);
sector_t *get_sector(sector_index_t index);
tile_t *get_tile(ssize_t x, ssize_t y);
- void link(game::entity_t *entity);
- void unlink(game::entity_t *entity);
void render(sf::RenderWindow *window);
};
+
+ class entity_t {
+ world_t *parent_world;
+ std::vector<sector_t*> parents;
+
+ public:
+ sf::Vector2f origin, size;
+
+ void link(world_t *world);
+ void unlink();
+ };
+}
+
+namespace game {
+ class state_t {
+ world::world_t world;
+
+ public:
+ void tick(void);
+ void render(sf::RenderWindow *window_);
+ };
}
namespace interface {
class state_t {
+ sf::RenderWindow *window;
+ game::state_t *game;
+
struct {
sf::Vector2f center;
int target_zoom = 3;
@@ -60,11 +110,49 @@ namespace interface {
} camera;
public:
- sf::RenderWindow *window;
- world::world_t *world;
-
- state_t(sf::RenderWindow *window_, world::world_t *world_);
+ state_t(sf::RenderWindow *window_, game::state_t *game);
void tick(void);
void render(void);
};
}
+
+// Divide and round to minus infinity.
+template <typename T>
+T divide_rmi(T x, T y, T *rem)
+{
+ T rv;
+
+ if (x >= 0) {
+ *rem = x % y;
+ return x / y;
+ }
+
+ rv = (x + 1) / y - 1;
+ *rem = x - rv * y;
+ return rv;
+}
+
+// Modulo operation. y is expected to be positive.
+template <typename T>
+T mod(T x, T y)
+{
+ return (x % y) + (x < 0 ? y : 0);
+}
+
+// Linear interpolation.
+template <typename T>
+T lerp(T a, T b, T x)
+{
+ return a * (1 - x) + b * x;
+}
+
+// Bilinear interpolation.
+template <typename T>
+T bilerp(T a, T b, T c, T d, T x, T y)
+{
+ T ab, cd;
+
+ ab = lerp(a, b, x);
+ cd = lerp(c, d, x);
+ return lerp(ab, cd, y);
+}
diff --git a/src/game.cpp b/src/game.cpp
index 9ce0a82..05b0139 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -2,6 +2,12 @@
namespace game {
+class entity_t : world::entity_t {
+ virtual void render(sf::RenderWindow *window) = 0;
+};
+void state_t::tick(void)
+{
+}
} //namespace game
diff --git a/src/interface.cpp b/src/interface.cpp
index aacc4b0..16fc77d 100644
--- a/src/interface.cpp
+++ b/src/interface.cpp
@@ -2,10 +2,10 @@
namespace interface {
-state_t::state_t(sf::RenderWindow *window_, world::world_t *world_)
+state_t::state_t(sf::RenderWindow *window_, game::state_t *game_)
{
window = window_;
- world = world_;
+ game = game_;
}
static sf::Vector2f compute_drag(sf::RenderWindow *window, sf::Vector2f drag_ref)
@@ -48,12 +48,6 @@ void state_t::tick(void)
return;
case sf::Event::MouseButtonPressed:
- if (event.mouseButton.button == 0) {
- sf::Vector2f vmouse = window->mapPixelToCoords(
- sf::Vector2i(event.mouseButton.x,
- event.mouseButton.y));
- world->get_tile(vmouse.x, vmouse.y)->type = 0;
- }
if (event.mouseButton.button == 1) {
camera.dragging = true;
camera.drag_ref = window->mapPixelToCoords(
diff --git a/src/main.cpp b/src/main.cpp
index 1f69582..d1afc2f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,19 +2,20 @@
int main()
{
- sf::RenderWindow window(sf::VideoMode(800, 600), "SFML");
- world::world_t world;
- interface::state_t interface(&window, &world);
+ sf::RenderWindow window(sf::VideoMode(800, 600), "Minitrem");
+ game::state_t game;
+ interface::state_t interface(&window, &game);
window.setVerticalSyncEnabled(true);
while (1) {
+ game.tick();
interface.tick();
if (!window.isOpen())
break;
window.clear();
- world.render(&window);
+ game.render(&window);
interface.render();
window.display();
}
diff --git a/src/procgen.cpp b/src/procgen.cpp
new file mode 100644
index 0000000..09ccae5
--- /dev/null
+++ b/src/procgen.cpp
@@ -0,0 +1,87 @@
+#include "common.hpp"
+#include <cmath>
+
+namespace procgen {
+
+void prng_t::seed(uint32_t seed)
+{
+ state = seed;
+ next();
+ next();
+}
+
+uint32_t prng_t::next(void)
+{
+ // glibc's LCG parameters (with m = 2^32 - 1).
+ state *= 1103515245;
+ state += 12345;
+ return state;
+}
+
+float prng_t::next_float(void)
+{
+ return (float)next() / 4294967295.0f;
+}
+
+void prng_t::unit_vec(float out[2])
+{
+ float t;
+
+ t = next_float() * 2.0f * M_PI;
+ out[0] = cos(t);
+ out[1] = sin(t);
+}
+
+void perlin_noise_t::generate(prng_t *prng, size_t size_)
+{
+ if (table)
+ delete table;
+
+ size = size_;
+ table = new float[size * size][2];
+
+ for (size_t y = 0; y < size; y++)
+ for (size_t x = 0; x < size; x++)
+ prng->unit_vec(table[y * size + x]);
+}
+
+float perlin_noise_t::table_dot(size_t nx, size_t ny, float dx, float dy)
+{
+ return table[ny * size + nx][0] * dx + table[ny * size + nx][1] * dy;
+}
+
+static float smooth_step(float x)
+{
+ return 3 * x * x - 2 * x * x * x;
+}
+
+float perlin_noise_t::get(float x, float y, float scale)
+{
+ size_t nx, ny, nx1, ny1;
+ float s, t, a, b, c, d;
+
+ x /= scale;
+ y /= scale;
+
+ nx = mod<ssize_t>(floor(x), size);
+ ny = mod<ssize_t>(floor(y), size);
+ nx1 = (nx == size - 1 ? 0 : nx + 1);
+ ny1 = (ny == size - 1 ? 0 : ny + 1);
+
+ s = smooth_step(x - floor(x));
+ t = smooth_step(y - floor(y));
+
+ a = table_dot(nx, ny, -s, -t);
+ b = table_dot(nx1, ny, -s + 1.0f, -t);
+ c = table_dot(nx, ny1, -s, -t + 1.0f);
+ d = table_dot(nx1, ny1, -s + 1.0f, -t + 1.0f);
+
+ return bilerp(a, b, c, d, s, t);
+}
+
+perlin_noise_t::~perlin_noise_t()
+{
+ delete table;
+}
+
+} // namespace procgen
diff --git a/src/render.cpp b/src/render.cpp
index 218dff0..05785ae 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -7,7 +7,7 @@ static void draw_tile(sf::RenderWindow *window, float x, float y,
{
wot_rect.setSize(sf::Vector2f(1.0f, 1.0f));
wot_rect.setPosition(sf::Vector2f(x, y));
- wot_rect.setFillColor(sf::Color(tile->type, 255 - tile->type, tile->type + 128));
+ wot_rect.setFillColor(sf::Color(tile->type, tile->type, tile->type));
wot_rect.setOutlineColor(sf::Color::Transparent);
window->draw(wot_rect);
}
@@ -28,14 +28,14 @@ static void draw_sector(sf::RenderWindow *window, world::world_t *world,
}
wot_rect.setSize(sf::Vector2f(SECTOR_SIZE, SECTOR_SIZE));
- wot_rect.setPosition(sf::Vector2f(index.x * 16, index.y * 16));
+ wot_rect.setPosition(sf::Vector2f(index.x * SECTOR_SIZE, index.y * SECTOR_SIZE));
wot_rect.setOutlineColor(sf::Color::Yellow);
wot_rect.setOutlineThickness(0.06f);
wot_rect.setFillColor(sf::Color::Transparent);
window->draw(wot_rect);
}
-void world::world_t::render(sf::RenderWindow *window)
+void game::state_t::render(sf::RenderWindow *window)
{
sf::Vector2u size = window->getSize();
sf::Vector2f A, B, C, D;
@@ -59,7 +59,7 @@ void world::world_t::render(sf::RenderWindow *window)
for (ssize_t y = index_box.top; y < index_box.height; y++)
for (ssize_t x = index_box.left; x < index_box.width; x++)
- draw_sector(window, this, world::sector_index_t(x, y));
+ draw_sector(window, &world, world::sector_index_t(x, y));
}
void interface::state_t::render()
diff --git a/src/world.cpp b/src/world.cpp
index b5aeea2..dc25f66 100644
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -23,21 +23,39 @@ bool sector_index_t::operator<(sector_index_t B) const
return false;
}
-void sector_t::generate(sector_index_t index)
+world_t::world_t(void)
{
+ prng.seed(124);
+ perlin.generate(&prng, 32);
+}
+
+void world_t::generate(sector_t *sector, sector_index_t index)
+{
+ sector->bounds.left = index.x * SECTOR_SIZE;
+ sector->bounds.top = index.y * SECTOR_SIZE;
+ sector->bounds.width = SECTOR_SIZE;
+ sector->bounds.height = SECTOR_SIZE;
+
std::cout << "generating (" << index.x << ", " << index.y << ")\n";
for (ssize_t ly = 0; ly < SECTOR_SIZE; ly++)
for (ssize_t lx = 0; lx < SECTOR_SIZE; lx++) {
ssize_t x, y;
+ float noise;
x = index.x * SECTOR_SIZE + lx;
y = index.y * SECTOR_SIZE + ly;
- tiles[ly * SECTOR_SIZE + lx].type = (x ^ y) * 151;
+ noise = perlin.get(x, y, 30.0f) * 0.6f +
+ perlin.get(x, y, 15.0f) * 0.25f +
+ perlin.get(x, y, 7.0f) * 0.1f +
+ perlin.get(x, y, 3.0f) * 0.05f;
+
+ sector->tiles[ly * SECTOR_SIZE + lx].type =
+ (noise + 1) * 100;
}
- empty = false;
+ sector->empty = false;
}
sector_t *world_t::get_sector(sector_index_t index)
@@ -47,40 +65,36 @@ sector_t *world_t::get_sector(sector_index_t index)
sector = &sectors[index];
if (sector->empty)
- sector->generate(index);
+ generate(sector, index);
return sector;
}
-// divide and round to minus infinity
-static ssize_t divide_rmi(ssize_t x, ssize_t y, size_t *rem)
-{
- ssize_t rv;
-
- if (x >= 0) {
- *rem = x % y;
- return x / y;
- }
-
- rv = (x + 1) / y - 1;
- *rem = x - rv * y;
- return rv;
-}
-
tile_t *world_t::get_tile(ssize_t x, ssize_t y)
{
sector_index_t index;
sector_t *sector;
- size_t tx, ty;
+ ssize_t tx, ty;
- index.x = divide_rmi(x, SECTOR_SIZE, &tx);
- index.y = divide_rmi(y, SECTOR_SIZE, &ty);
- printf("get_tile(%zd, %zd)\n", x, y);
- printf("\tsector is (%zd, %zd)\n", index.x, index.y);
+ index.x = divide_rmi(x, (ssize_t)SECTOR_SIZE, &tx);
+ index.y = divide_rmi(y, (ssize_t)SECTOR_SIZE, &ty);
sector = get_sector(index);
- printf("\ttile is (%zd, %zd)\n", tx, ty);
return sector->tiles + ty * SECTOR_SIZE + tx;
}
+void entity_t::link(world_t *world)
+{
+ // TODO
+}
+
+void entity_t::unlink(void)
+{
+ for (sector_t *sector : parents)
+ sector->ents.erase(sector->ents.find(this));
+
+ parents.clear();
+ parent_world = nullptr;
}
+
+} // namespace world
generated by cgit (git 2.34.1) at 2024-12-25 18:12:05 +0000