SDLPP: add collider IDs

sdlpp/sdlpp_collision.cpp

@@ -9,6 +9,12 @@ CollisionPolygon::CollisionPolygon( const Vec2D< double > &input ) {
     original = input;
     position = { 0, 0 };
 }
+CollisionPolygon::CollisionPolygon( double x, double y, uint64_t id )
+        : CollisionPolygon( Vec2D< double >( x, y ), id ) {}
+CollisionPolygon::CollisionPolygon( const Vec2D< double > &input, uint64_t id )
+        : CollisionPolygon( input ) {
+    _id = id;
+}
 
 bool CollisionPolygon::isInfinite() const {
     return infinite;
@@ -17,7 +23,10 @@ void CollisionPolygon::setInfinite() {
     infinite = true;
 }
 
-void CollisionPolygon::updateCollision( int x, int y, int w, int h ) {
+void CollisionPolygon::updateCollision( int x, int y, int w, int h,
+                                        uint64_t id ) {
+    if ( _id == static_cast< uint64_t >( -1 ) )
+        _id = id;
     position = Vec2D< int >( original.getX() * w + x, original.getY() * h + y );
 }
 
@@ -34,6 +43,12 @@ void CollisionPolygon::setColor( const std::string &color ) {
 void CollisionPolygon::setOutlineColor( const std::string &color ) {
     sdl_outline = getSDLColorHEX( color );
 }
+void CollisionPolygon::setId( uint64_t id ) {
+    _id = id;
+}
+uint64_t CollisionPolygon::getId() {
+    return _id;
+}
 
 bool infinityIntersection( const SDLPP::CollisionPolygon &infinite,
                            const SDLPP::CollisionPolygon &other ) {