Made multiple imguis possible

src/lava-vr/VRImgui.cc

@@ -112,6 +112,7 @@ void VRImgui::update(const glm::mat4 &screenPose,
     vmouse.z *= mHeight * pixels_per_meter;
     mVMouse = vmouse;
 
+    mImgui->makeCurrent();
     auto& io = ::ImGui::GetIO();
 
     if (pointer.y > -0.1f && pointer.y < 0.1f) {
@@ -153,7 +154,7 @@ bool VRImgui::visible() const
 
 bool VRImgui::enabled() const
 {
-    return mCurrentOpacity > 0.5f && mTargetOpacity > 0.5f;
+    return !mBlocked && mCurrentOpacity > 0.5f && mTargetOpacity > 0.5f;
 }
 
 } // namespace vr

src/lava-vr/VRImgui.hh

@@ -47,9 +47,11 @@ class VRImgui {
     /// you can skip recording widgets if this returns false
     bool visible() const;
 
-    /// returns true if the ImGui is accepting input (due to fading state)
+    /// returns true if the ImGui is accepting input (due to fading state, or being blocked)
     bool enabled() const;
 
+    void setBlocked(bool val) { mBlocked = val; };
+
   protected:
     SharedGraphicsPipeline mPipeline;
     SharedDescriptorSet mDescriptor;
@@ -57,6 +59,7 @@ class VRImgui {
     float mCurrentOpacity = 1.0f, mTargetOpacity = 1.0f;
     glm::mat4 mPose;
     glm::vec3 mVMouse;
+    bool mBlocked = false;
 
     imgui::UniqueImGui mImgui;
 };