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#include "transform_system.h"
#include "game.h"
#include "map.h"
void TransformSystem::initSprite(int spriteId, vec2i loc) {
Sprite& sprite = game_.getSprite(spriteId);
sprite.loc = loc;
spritesByY_.emplace(loc.y(), spriteId);
}
void TransformSystem::moveSprite(int spriteId, vec2i newLoc) {
Sprite& sprite = game_.getSprite(spriteId);
bool changedY = (sprite.loc.y() != newLoc.y());
if (changedY) {
spritesByY_.erase(std::make_tuple(sprite.loc.y(), spriteId));
}
sprite.loc = newLoc;
if (changedY) {
spritesByY_.emplace(newLoc.y(), spriteId);
}
}
CollisionResult TransformSystem::checkCollision(int spriteId, vec2i newLoc, Direction dir) {
CollisionResult result;
Sprite& sprite = game_.getSprite(spriteId);
const Map& map = game_.getMap();
bool blocked = false;
const vec2i UL_COL_BOX = { 8, 8 };
const vec2i DR_COL_BOX = { 4, 0 };
vec2i oldColPosUL = (sprite.loc - UL_COL_BOX) / map.getTileSize();
vec2i newColPosUL = (newLoc - UL_COL_BOX) / map.getTileSize();
vec2i oldColPosDR = (sprite.loc + DR_COL_BOX) / map.getTileSize();
vec2i newColPosDR = (newLoc + DR_COL_BOX) / map.getTileSize();
if (dirHasDir(sprite.dir, Direction::right) &&
newColPosDR.x() > oldColPosDR.x()) {
for (int y = newColPosUL.y(); y <= newColPosDR.y(); y++) {
if (map.isBlocked(newColPosDR.x(), y)) {
result.horiz.blocked = true;
result.horiz.dir = Direction::right;
break;
}
}
}
if (dirHasDir(sprite.dir, Direction::left) &&
newColPosUL.x() < oldColPosUL.x()) {
for (int y = newColPosUL.y(); y <= newColPosDR.y(); y++) {
if (map.isBlocked(newColPosUL.x(), y)) {
result.horiz.blocked = true;
result.horiz.dir = Direction::left;
break;
}
}
}
if (dirHasDir(sprite.dir, Direction::down) &&
newColPosDR.y() > oldColPosDR.y()) {
for (int x = newColPosUL.x(); x <= newColPosDR.x(); x++) {
if (map.isBlocked(x, newColPosDR.y())) {
result.vert.blocked = true;
result.vert.dir = Direction::down;
break;
}
}
}
if (dirHasDir(sprite.dir, Direction::up) &&
newColPosUL.y() < oldColPosUL.y()) {
for (int x = newColPosUL.x(); x <= newColPosDR.x(); x++) {
if (map.isBlocked(x, newColPosUL.y())) {
result.vert.blocked = true;
result.vert.dir = Direction::up;
break;
}
}
}
return result;
}
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