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Updated tutorial_texscreen (markdown)

Juan Linietsky 2015-03-24 11:49:12 -03:00
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tutorial_texscreen.md

@ -60,5 +60,5 @@ So, to make it clearer, here's how the backbuffer copying logic works in Godot:
* If a node uses the texscreen(), the entire screen is copied to the back buffer before drawing that node. This only happens the first time, subsequent nodes do not trigger this.
* If a BackBufferCopy node was processed before the situation in the point above (even if texscreen() was not used), this behavior described in the point above does not happen. In other words, automatic copying of the entire screen only happens if texscreen() is used in a node for the first time and no BackBufferCopy node (not disabled) was found before in tree-order.
* BackBufferCopy can copy either the entire screen or a region. If your shader uses pixels not in the region copied, the result of that read is **undefined**. In other words, it's possible to use BackBufferCopy to copy back a region of the screen and then use texscreen() on a different region. Avoid this behavior!
* BackBufferCopy can copy either the entire screen or a region. If set to only a region (not the whole screen) and your shader uses pixels not in the region copied, the result of that read is **undefined** (most likely garbage from previous frames). In other words, it's possible to use BackBufferCopy to copy back a region of the screen and then use texscreen() on a different region. Avoid this behavior!