CSharpGL.ZeroIndexBuffer.Render C# (CSharp) Method

        public override void Render(RenderEventArgs arg)
        {
            uint mode = 0;
            if (arg.PickingGeometryType == PickingGeometryType.Point
                && this.Mode.ToGeometryType() == PickingGeometryType.Line)// picking point from a line
            {
                // this maybe render points that should not appear.
                // so need to select by another picking.
                mode = (uint)DrawMode.Points;
            }
            else
            {
                mode = (uint)this.Mode;
            }

            int primCount = this.PrimCount;
            if (primCount < 1) { throw new Exception("error: primCount is less than 1."); }
            else if (primCount == 1)
            {
                OpenGL.DrawArrays(mode, this.FirstVertex, this.RenderingVertexCount);
            }
            else
            {
                if (glDrawArraysInstanced == null)
                { glDrawArraysInstanced = OpenGL.GetDelegateFor<OpenGL.glDrawArraysInstanced>(); }

                glDrawArraysInstanced(mode, this.FirstVertex, this.RenderingVertexCount, primCount);
            }
        }