ScreenBounds

Struct

Source: ProjectedMapBounds.h

Description

Half-open screen-space bounding box accumulated across one or more expandProjectedMapBounds calls.

right and bottom are one PAST the last covered pixel -- the same convention a tile blit uses ([drawX, drawX + width)), so right - left and bottom - top are exact pixel widths/heights with no off-by-one at the edge.

valid distinguishes "never seeded" from the representable real box {0, 0, 0, 0} (e.g. a single-cell map at the origin with a zero-reach tileset). false means the next expandProjectedMapBounds call seeds the box directly from its own extent; true means it widens the existing box to the union. A default-constructed ScreenBounds{} is always the correct value to seed a fresh accumulation with.

Properties

Name	Type	Description
left	int	Leftmost covered screen X, in pixels.
top	int	Topmost covered screen Y, in pixels.
right	int	One past the rightmost covered screen X, in pixels.
bottom	int	One past the bottommost covered screen Y, in pixels.
valid	bool	false until the first successful expand call.