map.c++

namespace map {

	 // Check if a point can be reached via jump (no obstacles)
	 // See notes
	bool can_reach_with_jump (Vec from, Vec vel, Vec to, float float_time) {
		float t = (to.x - from.x) / vel.x;
		float height = 
		  t <= float_time
		    ?   vel.y                  * t
		      + (gravity/float_time/6) * t*t*t
		    :   vel.y*float_time
			  + (gravity/6)*float_time*float_time
		      + (vel.y + gravity/2*float_time*float_time) * (t-float_time)
		      + (gravity/2)                               * (t-float_time)*(t-float_time);
		return (to.y - from.y) < height;
	}




	void load_room (room::Def* r) {
		uint offset = 0;
		for (uint ry=0; ry < r->height; ry++)
		for (uint rx=0; rx < r->width; rx++) {
			uint x = rx + r->pos.x;
			uint y = ry + r->pos.y;
			uint16 tileid = r->tile(rx + offset, r->height - ry - 1);
			if (tileid == 0x8000) {  // Double tile
				at(x, y).tile1 = r->tile(rx + offset + 1, r->height - ry - 1);
				at(x, y).tile2 = r->tile(rx + offset + 2, r->height - ry - 1);
				offset += 2;
			}
			else at(x, y).tile1 = tileid;
		}
	}
	void unload_room (room::Def* r) {
		for (uint y=r->pos.y; y < r->pos.y + r->height; y++)
		for (uint x=r->pos.x; x < r->pos.x + r->width; x++)
			at(x, y) = Tile();
	}

}