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#include "common.hpp"
namespace world {
sector_index_t::sector_index_t ()
{
}
sector_index_t::sector_index_t (int64_t x_, int64_t y_)
{
x = x_;
y = y_;
}
sector_index_t::sector_index_t (float x_, float y_)
{
x = (int64_t)floor(x_ / SECTOR_SIZE);
y = (int64_t)floor(y_ / SECTOR_SIZE);
}
bool sector_index_t::operator<(sector_index_t B) const
{
if (x < B.x)
return true;
if (x > B.x)
return false;
if (y < B.y)
return true;
return false;
}
world_t::world_t(void)
{
prng.seed(124);
perlin.generate(&prng, 32);
}
void world_t::generate_tile(ssize_t x, ssize_t y, tile_t *tile)
{
float waterlevel, height;
waterlevel = perlin.get(x, y, 100.0f) * 0.3f +
perlin.get(x, y, 50.0f) * 0.1f;
height = 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;
if (height < waterlevel - 0.2f)
tile->type = -1;
else if (height < waterlevel)
tile->type = 0;
else if (height < waterlevel + 0.05f)
tile->type = 1;
else {
if (perlin.get(x, y, 5.0f) > 0.0f)
tile->type = 3;
else
tile->type = 2;
}
}
void world_t::generate(sector_t *sector, sector_index_t index)
{
sector->index = 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++)
generate_tile(index.x * SECTOR_SIZE + lx,
index.y * SECTOR_SIZE + ly,
sector->tiles + ly * SECTOR_SIZE + lx);
sector->empty = false;
}
sector_t *world_t::get_sector(sector_index_t index)
{
sector_t *sector;
sector = §ors[index];
if (sector->empty)
generate(sector, index);
return sector;
}
tile_t *world_t::get_tile(ssize_t x, ssize_t y)
{
sector_index_t index;
sector_t *sector;
ssize_t tx, ty;
index.x = divide_rmi(x, (ssize_t)SECTOR_SIZE, &tx);
index.y = divide_rmi(y, (ssize_t)SECTOR_SIZE, &ty);
sector = get_sector(index);
return sector->tiles + ty * SECTOR_SIZE + tx;
}
std::list<sector_t*> world_t::get_sectors(sf::FloatRect rect)
{
sector_index_t base(rect.left, rect.top),
upper(rect.left + rect.width, rect.top + rect.height);
std::list<sector_t*> list;
for (int64_t y = base.y; y <= upper.y; y++)
for (int64_t x = base.x; x <= upper.x; x++) {
sector_index_t index(x, y);
list.push_back(get_sector(index));
}
return list;
}
std::list<entity_t*> world_t::get_entities(sf::FloatRect rect)
{
static size_t cookie = 0;
std::list<entity_t*> list;
cookie++;
for (sector_t *sector : get_sectors(rect))
for (entity_t *ent : sector->ents) {
if (ent->cookie == cookie)
continue;
if (!rect.intersects(ent->bounds))
continue;
ent->cookie = cookie;
list.push_back(ent);
}
return list;
}
void world_t::debug_point(sf::Vector2f point)
{
sector_index_t index(point.x, point.y);
printf("sector (%zd, %zd)\n", index.x, index.y);
}
void entity_t::link_to_sector(sector_t *sector)
{
parents.push_back(sector);
sector->ents.insert(this);
}
void entity_t::link(world_t *world)
{
float fx, fy;
sector_index_t base;
float xlip, ylip;
size_t xsecs, ysecs;
fx = floor(bounds.left);
fy = floor(bounds.top);
base = sector_index_t(fx, fy);
xlip = bounds.left + bounds.width - (base.x + 1) * SECTOR_SIZE;
ylip = bounds.top + bounds.height - (base.y + 1) * SECTOR_SIZE;
if (xlip > 0.0f)
xsecs = ceil(xlip / SECTOR_SIZE) + 1;
else
xsecs = 1;
if (ylip > 0.0f)
ysecs = ceil(ylip / SECTOR_SIZE) + 1;
else
ysecs = 1;
for (int64_t y = 0; y < (int64_t)ysecs; y++)
for (int64_t x = 0; x < (int64_t)xsecs; x++) {
sector_index_t index(base.x + x, base.y + y);
sector_t *sector;
sector = world->get_sector(index);
link_to_sector(sector);
}
}
void entity_t::unlink(void)
{
for (sector_t *sector : parents)
sector->ents.erase(sector->ents.find(this));
parents.clear();
parent_world = nullptr;
}
} // namespace world
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