Tile* Chunk::GetTileAt(int x,int y) {
if (x >= SIZE) {
Chunk* current = m_WorldPtr->GetChunkAt(m_X+1, m_Y);
if (current == nullptr)
return nullptr;
return current->GetTileAt(x-SIZE, y);
}
if (x < 0) {
Chunk* current = m_WorldPtr->GetChunkAt(m_X-1, m_Y);
if (current == nullptr)
return nullptr;
return current->GetTileAt(x+ SIZE, y );
}
if (y >= SIZE) {
Chunk* current = m_WorldPtr->GetChunkAt(m_X, m_Y + 1);
if (current == nullptr)
return nullptr;
return current->GetTileAt(x, y - SIZE);
}
if(y < 0) {
Chunk* current = m_WorldPtr->GetChunkAt(m_X, m_Y - 1);
if (current == nullptr)
return nullptr;
return current->GetTileAt(x, y + SIZE);
}
return m_TileArrPtr[x*SIZE + y];
}
void ItemEntity::DoCollision(World* world, double deltaTime) {
m_pos.x += m_motion.x;
m_pos.y += m_motion.y;
int toprightX = (int)(m_pos.x - m_size.x / 2.0);
int toprightY = (int)(m_pos.y - m_size.y / 2.0);
Chunk* chunkPtr = world->GetChunkAt(toprightX / (Chunk::TILESIZE*Chunk::SIZE), toprightY / (Chunk::TILESIZE*Chunk::SIZE));
if (chunkPtr == nullptr) {
m_motion.y += 1 * deltaTime;
return;
}
int blockposX = toprightX / (Chunk::TILESIZE) - chunkPtr->GetX()*Chunk::SIZE;
int blockposY = (toprightY + m_size.y/2.0) / (Chunk::TILESIZE) - chunkPtr->GetY()*Chunk::SIZE;
Tile* tilePtr = chunkPtr->GetTileAt(blockposX, blockposY);
double topRightLocX = toprightX - chunkPtr->GetX()* Chunk::TILESIZE* Chunk::SIZE;
double topRightLocY = toprightY - chunkPtr->GetY()* Chunk::TILESIZE* Chunk::SIZE;
if (tilePtr != nullptr) {
if (tilePtr->type != Chunk::Type::AIR) {
m_pos.y = blockposY * Chunk::TILESIZE + chunkPtr->GetY()* Chunk::TILESIZE* Chunk::SIZE - m_size.y / 2;
m_motion.y = 0;
} else {
m_motion.y += 1 * deltaTime;
}
}
}