void setTriangleIndices(int triangle, int v1, int v2, int v3)

Set the corresponding vertices for the triangle indices.

Source

void setTriangleIndices(int triangle, int v1, int v2, int v3) {
  var offset = triangle * 3;
  ixList[offset + 0] = v1;
  ixList[offset + 1] = v2;
  ixList[offset + 2] = v3;
}