Change building floor parameters for a sub-mesh.

BuildingSubMesh_FloorParams.cs

var subMesh = 0;
var vec = new Vector4(0.0f, 3.1f, 3.0f, 900.1f);

var asset = (ToolsModifierControl.toolController.m_editPrefabInfo as BuildingInfo).m_subMeshes[subMesh].m_subInfo;
asset.m_material.SetVector("_FloorParams", vec);