Hello Sandro,
Wednesday, December 6, 2006, 1:48:51 PM, you wrote:
SS> void clear_invalidated() {
SS> m_invalidated = false;
SS> + // Is it correct to set old bounds to null ?
SS> + // Why are we doing so ?
SS> m_old_invalidated_bounds.set_null();
SS> }
Yes, it's corrent. m_old_invalidated_bounds is used to keep track of
the character's position prior to any visual change.
For example, when you move a character horizontally, then
m_old_invalidated_bounds will contain the bounding rect prior to the
movement and get_invalidated_bounds() will internally get the bounding
rect of the new position. But since both positions need to be redrawn
both rects need to be unified.
+----------------------------------+
|............. ooooooooooooo|
|. . o o|
|. . -> o o|
|. . o o|
|............. ooooooooooooo|
+----------------------------------+
.... = old position
oooo = new position
---- = combined invalidated rect (what's being re-rendered)
Udo
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