float MapMode::GetScreenXCoordinate(float tile_position_x) const
{
tile_position_x = (tile_position_x - _map_frame.screen_edges.left)
* VIDEO_STANDARD_RES_WIDTH / SCREEN_GRID_X_LENGTH;
tile_position_x = FloorToFloatMultiple(tile_position_x, GetMapPixelXLength());
return tile_position_x;
}
float MapMode::GetScreenYCoordinate(float tile_position_y) const
{
tile_position_y = (tile_position_y - _map_frame.screen_edges.top)
* VIDEO_STANDARD_RES_HEIGHT / SCREEN_GRID_Y_LENGTH;
tile_position_y = FloorToFloatMultiple(tile_position_y, GetMapPixelYLength());
return tile_position_y;
}
bool MapZone::_ShouldDraw(const ZoneSection& section) {
MapMode *map = MapMode::CurrentInstance();
// If the context is not in one of the active context, don't display it.
if (!(_active_contexts & map->GetCurrentContext()))
return false;
MapRectangle rect;
rect.top = section.top_row;
rect.bottom = section.bottom_row;
rect.left = section.left_col;
rect.right = section.right_col;
// Determine if the sprite is off-screen and if so, don't draw it.
if (!MapRectangle::CheckIntersection(rect, map->GetMapFrame().screen_edges))
return false;
// Determine the center position coordinates for the camera
float x_pos, y_pos; // Holds the final X, Y coordinates of the camera
float x_pixel_length, y_pixel_length; // The X and Y length values that coorespond to a single pixel in the current coodinate system
float rounded_x_offset, rounded_y_offset; // The X and Y position offsets of the object, rounded to perfectly align on a pixel boundary
// TODO: the call to GetPixelSize() will return the same result every time so long as the coordinate system did not change. If we never
// change the coordinate system in map mode, then this should be done only once and the calculated values should be saved for re-use.
// However, we've discussed the possiblity of adding a zoom feature to maps, in which case we need to continually re-calculate the pixel size
x_pos = rect.left + (rect.right - rect.left) / 2;
y_pos = rect.top + (rect.bottom - rect.top);
hoa_video::VideoManager->GetPixelSize(x_pixel_length, y_pixel_length);
rounded_x_offset = FloorToFloatMultiple(GetFloatFraction(x_pos), x_pixel_length);
rounded_y_offset = FloorToFloatMultiple(GetFloatFraction(y_pos), y_pixel_length);
x_pos = static_cast<float>(GetFloatInteger(x_pos)) + rounded_x_offset;
y_pos = static_cast<float>(GetFloatInteger(y_pos)) + rounded_y_offset;
// Move the drawing cursor to the appropriate coordinates for this sprite
hoa_video::VideoManager->Move(x_pos - map->GetMapFrame().screen_edges.left,
y_pos - map->GetMapFrame().screen_edges.top);
return true;
}