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Tilemap: Fix map viewport calculation

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Calculation was completely off as it didn't take into
account the imposed viewport origin.

All in all, similar fixes as the previous ones to TilemapVX.
This commit is contained in:
Jonas Kulla 2015-07-19 17:30:25 +02:00
parent dd7545fcf2
commit 30465691ae
3 changed files with 27 additions and 49 deletions
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4
src/tilemapvx.cpp
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@ -186,9 +186,7 @@ struct TilemapVXPrivate : public ViewportElement, TileAtlasVX::Reader
const Vec2i combOrigin = origin + sceneGeo.orig;
const Vec2i geoSize = sceneGeo.rect.size();
/* Round the combined origin (which is in pixels) down to the nearest
* top left tile boundary, by masking off the lower 5 bits (2^5 = 32) */
newMvp.setPos((combOrigin & ~(32-1)) / 32);
newMvp.setPos(getTilePos(combOrigin));
/* Ensure that the size is big enough to cover the whole viewport,
* and add one tile row/column as a buffer for scrolling */