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Enable selecting highest resolution tile from a TileProviderGroup

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This commit is contained in:
Erik Broberg
2016-07-14 01:00:21 -04:00
parent 938843cda4
commit 7e2e2cf2f4
2 changed files with 21 additions and 0 deletions
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19
modules/globebrowsing/tile/tileselector.cpp
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@@ -70,6 +70,25 @@ namespace openspace {
return{ Tile::TileUnavailable, uvTransform };
}
TileAndTransform TileSelector::getHighestResolutionTile(const TileProviderGroup& tileProviderGroup, ChunkIndex chunkIndex) {
TileAndTransform mostHighResolution;
mostHighResolution.tile = Tile::TileUnavailable;
mostHighResolution.uvTransform.uvScale.x = 0;
auto activeProviders = tileProviderGroup.getActiveTileProviders();
for (size_t i = 0; i < activeProviders.size(); i++) {
TileAndTransform tileAndTransform = getHighestResolutionTile(activeProviders[i].get(), chunkIndex);
bool tileIsOk = tileAndTransform.tile.status == Tile::Status::OK;
bool tileHasPreprocessData = tileAndTransform.tile.preprocessData != nullptr;
bool tileIsHigherResolution = tileAndTransform.uvTransform.uvScale.x > mostHighResolution.uvTransform.uvScale.x;
if (tileIsOk && tileHasPreprocessData && tileIsHigherResolution) {
mostHighResolution = tileAndTransform;
}
}
return mostHighResolution;
}
void TileSelector::ascendToParent(ChunkIndex& chunkIndex, TileUvTransform& uv) {
uv.uvOffset *= 0.5;
uv.uvScale *= 0.5;

2
modules/globebrowsing/tile/tileselector.h
View File

@@ -29,6 +29,7 @@
#include <modules/globebrowsing/chunk/chunkindex.h>
#include <modules/globebrowsing/tile/tileprovider.h>
#include <modules/globebrowsing/tile/tileprovidermanager.h>
@@ -48,6 +49,7 @@ namespace openspace {
class TileSelector {
public:
static TileAndTransform getHighestResolutionTile(TileProvider* tileProvider, ChunkIndex chunkIndex, int parents = 0);
static TileAndTransform getHighestResolutionTile(const TileProviderGroup& tileProviderGroup, ChunkIndex chunkIndex);
private:
static void ascendToParent(ChunkIndex& chunkIndex, TileUvTransform& uv);
};