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();
}
protected void DrawSelection()
{
if (SelectionVisible)
{
_shader.SetShaderColor(SelectionColor);
_selection.BindAndDraw(_shader);
}
}
protected void DrawGridLines()
{
_shader.SetShaderMatrix(
Matrix4.CreateOrthographicOffCenter(
0, 1,
(float)AxisY.VisibleMinimum,
(float)AxisY.VisibleMaximum,
-1, 1
)
);
_shader.SetTranslateMatrix(Matrix4.Identity);
_shader.SetShaderColor(Color.DarkGray);
GL.LineWidth(1.0f);
_gridLines.BindAndDraw(_shader);
}
