public void Draw(float max)
{
Matrix4 transform = CanvasManager.ViewportTransform;
GL.Enable(EnableCap.ScissorTest);
transform = Matrix4.Scale(1, 2 / max, 1) * Matrix4.CreateTranslation(0, -1, 0) *
CanvasManager.ViewportTransform;
GL.UniformMatrix4(_shaderProgram.UniformTransform, false, ref transform);
GL.Uniform4(_shaderProgram.UniformColor, Color4.Gray);
//GL.LineWidth(1f);
GL.Disable(EnableCap.ScissorTest);
//transform = Matrix4.CreateTranslation(0, pos.Y, 0) * Matrix4.Scale(1, scale.Y, 1) * CanvasManager.ViewportTransform;
//GL.UniformMatrix4(_uniformTransform, false, ref transform);
GL.LineWidth(2f);
GL.Scissor(CanvasManager.TickSize, CanvasManager.BorderSize + CanvasManager.TickSize - 1, CanvasManager.ControlWidth - CanvasManager.TickSize,
CanvasManager.ControlHeight - 2 * (CanvasManager.BorderSize + CanvasManager.TickSize) + 2);
GL.Enable(EnableCap.ScissorTest);
YTicks.BeginDraw();
YTicks.Draw(BeginMode.Lines);
YTicks.EndDraw();
GL.Disable(EnableCap.ScissorTest);
}
public void GenerateAxis(long height)
{
//generate y ticks data
//Note - need allow different axis modes (count, data)
var digits = (int)Math.Floor(Math.Log10(height));
var yTickSpacing = (int)Math.Pow(10, digits - 1);
var max = (int)((((height / Math.Pow(10, digits)) + 1) * Math.Pow(10, digits)) / yTickSpacing);
var data = new List <Vector2>();
for (var k = 0; k <= max; k++)
{
var tickScale = 0.5f;
var y = k * yTickSpacing;
if (k % 10 == 0)
{
tickScale = 1;
}
data.Add(new Vector2(-1, y));
data.Add(new Vector2(-1 - CanvasManager.TickSize * tickScale * CanvasManager.PixelSize.X, y));
}
YTicksData = data.ToArray();
YTicks.BindData(YTicksData, BufferUsageHint.StaticDraw);
}
