Calculate fog opacity in terrain raster fragment shader when zero exa…

…ggeration is used
mapbox · Nov 30, 2022 · 5914011 · 5914011
1 parent d12e8f9
commit 5914011
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diff --git a/src/shaders/terrain_raster.fragment.glsl b/src/shaders/terrain_raster.fragment.glsl
@@ -19,7 +19,11 @@ void main() {
 #endif
 
 #ifdef FOG
+#ifdef ZERO_EXAGGERATION
+    color = fog_dither(fog_apply_premultiplied(color, v_fog_pos));
+#else
     color = fog_dither(fog_apply_from_vert(color, v_fog_opacity));
+#endif
 #endif
     gl_FragColor = color;
 #ifdef TERRAIN_WIREFRAME

diff --git a/src/shaders/terrain_raster.vertex.glsl b/src/shaders/terrain_raster.vertex.glsl
@@ -32,8 +32,12 @@ void main() {
     gl_Position = u_matrix * vec4(decodedPos, elevation, 1.0);
 
 #ifdef FOG
+#ifdef ZERO_EXAGGERATION
+    v_fog_pos = fog_position(decodedPos);
+#else
     v_fog_opacity = fog(fog_position(vec3(decodedPos, elevation)));
 #endif
+#endif
 
 #ifdef RENDER_SHADOWS
     vec3 pos = vec3(decodedPos, elevation);