Increase size of output vertex buffer

QTProject/subdivision.cpp

@@ -726,7 +726,7 @@ Subdivision::Result Subdivision::runShader(Input input, Tables &tables) {
     GLuint output_handle;
     f->glGenBuffers(1, &output_handle);
     f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, output_handle);
-    f->glBufferData(GL_SHADER_STORAGE_BUFFER, (input.vertex_buffer.size() + tables.edge_indices.size() / 4) * sizeof(Vertex), NULL, GL_DYNAMIC_DRAW);
+    f->glBufferData(GL_SHADER_STORAGE_BUFFER, (input.vertex_buffer.size() + tables.edge_indices.size() / 4 + (tables.vertex_offsets.size() - 1)) * sizeof(Vertex), NULL, GL_DYNAMIC_DRAW);
     result.vb_handle = output_handle;
 
     f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);