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| author | Fabian Guerra <fabian.guerra@mapbox.com> | 2018-02-15 11:54:51 -0500 |
|---|---|---|
| committer | Fabian Guerra <fabian.guerra@mapbox.com> | 2018-02-15 11:54:51 -0500 |
| commit | 903e7989ec3438a605bafbf5938de38cdb868e4a (patch) | |
| tree | a2f8ba01fd8bf41503396605b993f9e38b77e131 /src/mbgl/shaders/hillshade_prepare.cpp | |
| parent | c83dc310aa656132638a66e65ba8aa274b5e969f (diff) | |
| parent | 82de856c94bbc090ba30186011610da5e233e277 (diff) | |
| download | qtlocation-mapboxgl-903e7989ec3438a605bafbf5938de38cdb868e4a.tar.gz | |
Merge branch 'master' into release-boba
# Conflicts:
# platform/android/CHANGELOG.md
# platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/Mapbox.java
# platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/widgets/CompassView.java
# platform/android/scripts/exclude-activity-gen.json
# platform/ios/CHANGELOG.md
# platform/ios/Mapbox-iOS-SDK-nightly-dynamic.podspec
# platform/ios/Mapbox-iOS-SDK-symbols.podspec
# platform/ios/Mapbox-iOS-SDK.podspec
# platform/macos/CHANGELOG.md
Diffstat (limited to 'src/mbgl/shaders/hillshade_prepare.cpp')
| -rw-r--r-- | src/mbgl/shaders/hillshade_prepare.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/mbgl/shaders/hillshade_prepare.cpp b/src/mbgl/shaders/hillshade_prepare.cpp index 733658435e..8d0571f6a4 100644 --- a/src/mbgl/shaders/hillshade_prepare.cpp +++ b/src/mbgl/shaders/hillshade_prepare.cpp @@ -29,6 +29,7 @@ uniform sampler2D u_image; varying vec2 v_pos; uniform vec2 u_dimension; uniform float u_zoom; +uniform float u_maxzoom; float getElevation(vec2 coord, float bias) { // Convert encoded elevation value to meters @@ -71,16 +72,16 @@ void main() { // which can be reduced to: pow(2, 19.25619978527 - u_zoom) // we want to vertically exaggerate the hillshading though, because otherwise // it is barely noticeable at low zooms. to do this, we multiply this by some - // scale factor pow(2, (u_zoom - 14) * a) where a is an arbitrary value and 14 is the - // maxzoom of the tile source. here we use a=0.3 which works out to the - // expression below. see nickidlugash's awesome breakdown for more info + // scale factor pow(2, (u_zoom - u_maxzoom) * a) where a is an arbitrary value + // Here we use a=0.3 which works out to the expression below. see + // nickidlugash's awesome breakdown for more info // https://github.com/mapbox/mapbox-gl-js/pull/5286#discussion_r148419556 float exaggeration = u_zoom < 2.0 ? 0.4 : u_zoom < 4.5 ? 0.35 : 0.3; vec2 deriv = vec2( (c + f + f + i) - (a + d + d + g), (g + h + h + i) - (a + b + b + c) - ) / pow(2.0, (u_zoom - 14.0) * exaggeration + 19.2562 - u_zoom); + ) / pow(2.0, (u_zoom - u_maxzoom) * exaggeration + 19.2562 - u_zoom); gl_FragColor = clamp(vec4( deriv.x / 2.0 + 0.5, |