public void Render(ShaderColorXY shader, RectangleF view, Size areaInPixels, TimeStamp offset)
{
if (_vbo.Length == 0)
{
return;
}
// TODO: this should be done in Add
// as the buffer will be reloaded for every frame.
// Not much data to be copied, but still unnecessary.
var lastVertex = _vbo[_vbo.Length - 1];
_vbo.AddVertex(float.MaxValue, lastVertex.Y);
_vbo.IndexFromLength();
_vbo.Reload();
shader.SetTranslateMatrix(Matrix4.Identity);
shader.SetShaderColor(LineColor);
var trsl = Matrix4.CreateTranslation(-offset.ToRate(SamplesPerSecond), 0, 0);
shader.SetTranslateMatrix(trsl);
GL.LineWidth(Selected ? 3.0f : 1.0f);
_vbo.DrawMode = BeginMode.LineStrip;
_vbo.BindAndDraw(shader);
GL.PointSize(Selected ? 8.0f : 6.0f);
_vbo.DrawMode = BeginMode.Points;
_vbo.BindAndDraw(shader);
_vbo.PopVertex();
}
private void BuildGridLineBuffer()
{
_gridLines.Clear();
foreach (var tick in AxisY.MajorTicks)
{
_gridLines.AddVertex(0, (float)tick);
_gridLines.AddVertex(1, (float)tick);
}
foreach (var tick in AxisX.MajorTicks)
{
_gridLines.AddVertex((float)((tick - AxisX.VisibleMinimum) / AxisX.Range), (float)AxisY.VisibleMinimum);
_gridLines.AddVertex((float)((tick - AxisX.VisibleMinimum) / AxisX.Range), (float)AxisY.VisibleMaximum);
}
_gridLines.IndexFromLength();
_gridLines.Reload();
}
