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#include <inventory.hpp>
#include <common.hpp>
#include <error.hpp>
#include <render.hpp>
#include <ui.hpp>
#include <forward_list>
#include <unordered_map>
#include <tinyxml2.h>
using namespace tinyxml2;
extern vec2 offset;
static std::unordered_map<std::string, Item> itemList;
constexpr const char* itemsPath = "config/items.xml";
static bool fullInventory = false;
constexpr int entrySize = 70;
constexpr int hotbarSize = 4;
constexpr float inventoryZ = -6.0f;
constexpr unsigned int rowSize = 8;
void InventorySystem::configure(entityx::EventManager &ev)
{
ev.subscribe<KeyDownEvent>(*this);
ev.subscribe<MouseClickEvent>(*this);
}
void InventorySystem::loadItems(void) {
XMLDocument doc;
doc.LoadFile(itemsPath);
auto item = doc.FirstChildElement("item");
if (item == nullptr)
UserError("No items found");
do {
itemList.emplace(item->StrAttribute("name"), item);
item = item->NextSiblingElement("item");
} while (item != nullptr);
}
void InventorySystem::update(entityx::EntityManager &en, entityx::EventManager &ev, entityx::TimeDelta dt)
{
(void)en;
(void)ev;
(void)dt;
}
void InventorySystem::render(void)
{
int size = items.size();
// calculate positions
items.front().loc = vec2(offset.x - entrySize / 2 * hotbarSize, offset.y + game::SCREEN_HEIGHT / 2 - entrySize);
for (unsigned int i = 1; i < hotbarSize; i++)
items[i].loc = vec2(items[i - 1].loc.x + entrySize, items[i - 1].loc.y);
ui::drawNiceBox(items[0].loc - 10, items[hotbarSize - 1].loc + vec2(entrySize + 4, entrySize + 10), inventoryZ);
if (fullInventory) {
vec2 start (offset.x - entrySize * rowSize / 2, offset.y + game::SCREEN_HEIGHT / 2 - 180);
for (unsigned int i = hotbarSize; i < items.size(); i++) {
items[i].loc = vec2(start.x + entrySize * ((i - hotbarSize) % rowSize), start.y);
if ((i - hotbarSize) % rowSize == rowSize - 1)
start.y -= entrySize;
}
ui::drawNiceBox(items[items.size() - rowSize].loc - 10, items[hotbarSize + rowSize - 1].loc + (entrySize + 4), inventoryZ);
} else {
size = hotbarSize;
}
// draw items
for (int n = 0; n < size; n++) {
auto &i = items[n];
// draw the slot
Render::textShader.use();
Render::textShader.enable();
Colors::black.use();
glUniform4f(Render::textShader.uniform[WU_tex_color], 1, 1, 1, .6);
glVertexAttribPointer(Render::textShader.tex, 2, GL_FLOAT, GL_FALSE, 0, Colors::texCoord);
vec2 end = i.loc + entrySize - 6;
GLfloat coords[18] = {
i.loc.x, i.loc.y, inventoryZ - 0.1, end.x, i.loc.y, inventoryZ - 0.1, end.x, end.y, inventoryZ - 0.1,
end.x, end.y, inventoryZ - 0.1, i.loc.x, end.y, inventoryZ - 0.1, i.loc.x, i.loc.y, inventoryZ - 0.1
};
glVertexAttribPointer(Render::textShader.coord, 3, GL_FLOAT, GL_FALSE, 0, coords);
glDrawArrays(GL_TRIANGLES, 0, 6);
glUniform4f(Render::textShader.uniform[WU_tex_color], 1, 1, 1, 1);
// draw the item
if (i.item != nullptr) {
i.item->sprite.use();
static const GLfloat tex[12] = {0,1,1,1,1,0,1,0,0,0,0,1};
glVertexAttribPointer(Render::textShader.tex, 2, GL_FLOAT, GL_FALSE, 0, tex);
vec2 end = i.loc + i.item->sprite.getDim();
GLfloat coords[18] = {
i.loc.x, i.loc.y, inventoryZ - 0.2, end.x, i.loc.y, inventoryZ - 0.2, end.x, end.y, inventoryZ - 0.2,
end.x, end.y, inventoryZ - 0.2, i.loc.x, end.y, inventoryZ - 0.2, i.loc.x, i.loc.y, inventoryZ - 0.2
};
glVertexAttribPointer(Render::textShader.coord, 3, GL_FLOAT, GL_FALSE, 0, coords);
glDrawArrays(GL_TRIANGLES, 0, 6);
ui::setFontZ(-7.2); // TODO fix z's
ui::putText(i.loc.x, i.loc.y, std::to_string(i.count).c_str());
ui::setFontZ(-6);
}
}
Render::textShader.disable();
Render::textShader.unuse();
}
void InventorySystem::receive(const MouseClickEvent &mce)
{
(void)mce;
}
void InventorySystem::receive(const KeyDownEvent &kde)
{
if (kde.keycode == SDLK_e) {
fullInventory ^= true;
}
}
void InventorySystem::add(const std::string& name, int count)
{
auto i = std::find_if(items.begin(), items.end(),
[&name](const InventoryEntry& ie) {
// either matching item that isn't filled, or empty slow
return (ie.item != nullptr && ie.item->name == name && ie.count < ie.item->stackSize) || ie.count == 0;
});
if (i != items.end()) {
auto& ie = *i;
// update the slot
if (ie.item == nullptr) {
ie.item = &itemList[name];
ie.count = count;
} else {
ie.count += count;
}
// handle overflow
if (ie.count > ie.item->stackSize) {
int diff = ie.count - ie.item->stackSize;
ie.count = ie.item->stackSize;
add(name, diff);
}
}
}
bool InventorySystem::take(const std::string& name, int count)
{
using InvIter = std::vector<InventoryEntry>::iterator;
std::forward_list<InvIter> toDelete;
InvIter next = items.begin();
int taken = 0;
while (taken < count) {
auto i = std::find_if(next, items.end(),
[&name](const InventoryEntry& ie) {
return ie.item != nullptr && ie.item->name == name;
});
if (i == items.end())
break;
toDelete.push_front(i);
taken += i->count;
}
if (taken < count)
return false;
for (auto& ii : toDelete) {
if (count > ii->count) {
ii->item = nullptr;
count -= ii->count;
ii->count = 0;
} else {
ii->count -= count;
if (ii->count == 0)
ii->item = nullptr;
break;
}
}
return true;
}
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