keep invisible opcs in lod to enable fast switching, see #484 & versi…

…on bump
pro3d-space · Jan 5, 2025 · 21cd88f · 21cd88f
1 parent 21b874d
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diff --git a/TEST_RELEASE_NOTES.md b/TEST_RELEASE_NOTES.md
@@ -1,3 +1,6 @@
+## 4.27.0-prerelease2
+- fixed lod when switching surfaces visible/invisible (keep invisible opcs in lod, to make fast switching possible)
+
 ## 4.27.0-prerelease1
 - coordinate frames as scale bars
 - fixed memory leak for high focal length fulcra

diff --git a/src/PRo3D.Core/Surface/Surface.Sg.fs b/src/PRo3D.Core/Surface/Surface.Sg.fs
@@ -175,8 +175,10 @@ module Sg =
         (isActive    : aval<bool>)
         =
 
-        let isRenderingActive = isActive.GetValue self
-        if isRenderingActive then
+        let isRenderingActive = 
+            //isActive.GetValue self, using isActive (actually is invisible) is not possible here, see https://github.com/pro3d-space/PRo3D/issues/484
+            true
+        if isRenderingActive  then
             let lodParams = lodParams.GetValue self
             let viewTrafo = viewTrafo.GetValue self
             let model = preTrafo * renderPatch.trafo.GetValue self