src/gfx/chain-data.js
function LineChainData(chain, gl, numVerts, float32Allocator) {
  VertexArray.call(this, gl, numVerts, float32Allocator);
  this._chain = chain;
}
function LineChainData(chain, gl, numVerts, float32Allocator) {
  VertexArray.call(this, gl, numVerts, float32Allocator);
  this._chain = chain;
}
function LineChainData ( chain , gl , numVerts , float32Allocator ) { VertexArray . call ( this , gl , numVerts , float32Allocator ) ; this . _chain = chain ; }
LineChainData and MeshChainData are two internal classes that add molecule- specific attributes and functionality to the IndexedVertexArray and VertexArray classes.
LineChainData and MeshChainData are two internal classes that add molecule - specific attributes and functionality to the IndexedVertexArray and VertexArray classes .