adding bounding sphere to renderabeltrailtrajectory

modules/base/rendering/renderabletrailtrajectory.cpp

@@ -333,6 +333,25 @@ void RenderableTrailTrajectory::update(const UpdateData& data) {
     }
 
     glBindVertexArray(0);
+
+    // Updating bounding sphere
+    glm::vec3 maxVertex(-std::numeric_limits<float>::max());
+    glm::vec3 minVertex(std::numeric_limits<float>::max());
+
+    auto setMax = [&maxVertex, &minVertex](const TrailVBOLayout& vertexData) {
+        maxVertex.x = std::max(maxVertex.x, vertexData.x);
+        maxVertex.y = std::max(maxVertex.y, vertexData.y);
+        maxVertex.z = std::max(maxVertex.z, vertexData.z);
+
+        minVertex.x = std::min(minVertex.x, vertexData.x);
+        minVertex.y = std::min(minVertex.y, vertexData.y);
+        minVertex.z = std::min(minVertex.z, vertexData.z);
+    };
+
+    std::for_each(_vertexArray.begin(), _vertexArray.end(), setMax);
+
+    setBoundingSphere(glm::distance(maxVertex, minVertex) / 2.0);
+
 }
 
 } // namespace openspace