/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.UserControl.Load" /> event.
/// Sets all the properties up but only if the form is not in designer mode,
/// because OpenGL calls in the Designer cause errors.
/// </summary>
/// <param name="e">An <see cref="T:System.EventArgs" /> that contains the event data.</param>
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
_rect = new Rectangle(0, 0, this.Size.Width, this.Size.Height);
this.MakeCurrent();
if (!(IsInDesignerMode()))
{
_shaders = new Shaders(Resources.LineShader_vert, Resources.LineShader_frag, Resources.TextShader_vert, Resources.TextShader_frag);
_textInstance = new TextInstance(_shaders);
_graphPane = new GraphPane(_rect, _textInstance);
_graphPane.ReSize(new GLRectangleF(0, 0, (int)_rect.Width, (int)_rect.Height));
_textInstance.GenerateFontImage(_graphPane.Rect);
GL.ClearColor(1.0f, 1.0f, 1.0f, 0.0f);
_zoomPanState = new ZoomPanState(ref _graphPane);
_FrameTimer.Tick += FrameTimer_Tick;
_FrameTimer.Interval = 25;
_FrameTimer.Start();
_stopwatch = new Stopwatch();
_stopwatch2 = new Stopwatch();
_stopwatch.Reset();
_stopwatch2.Reset();
_stopwatch.Start();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="GL_Border"/> class.
/// </summary>
/// <param name="color">The color.</param>
/// <param name="shaders">The shaders.</param>
public GL_Border(Color color, Shaders shaders)
{
float db = 0.9995000f;
_border = new float[8]
{// border not at 1/-1 because it gets clipped by OpenGL otherwise
1.0f * db, 1.0f * db,
1.0f * db, -1.0f * db,
-1.0f * db, -1.0f * db,
-1.0f * db, 1.0f * db
};
_VBO = GL.GenBuffer();//Set up Shaders, VBO and VAO
_VAO = GL.GenVertexArray();
_shaders = shaders;
_shaders.LineShader.Use();
GL.BindVertexArray(_VAO);
GL.EnableVertexAttribArray(_shaders.LineShader.VertexLocation);
GL.BindBuffer(BufferTarget.ArrayBuffer, _VBO); // bind the VBO and put in the Vertices.
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(sizeof(float) * _border.Length), _border, BufferUsageHint.StaticDraw);
_mat = Matrix4.Identity; //set the transformation to "no transformation"
GL.UniformMatrix4(_shaders.LineShader.MatrixLocation, false, ref _mat);
//set the Attribpointer for Vertex interpretation
GL.VertexAttribPointer(_shaders.LineShader.VertexLocation, 2, VertexAttribPointerType.Float, false, 2 * sizeof(float), 0);
GL.BindVertexArray(0);
_shaders.LineShader.StopUse();
_color = color;
}
/// <summary>
/// Initializes a new instance of the <see cref="TextInstance"/> class.
/// </summary>
/// <param name="shaders">The shaders.</param>
public TextInstance(Shaders shaders)
{
_fontBitmapFilename = "Font_bitmap.png";
_glyphsPerLine = 16;
_glyphLineCount = 16;
_atlasOffsetX = -3;
_atlasOffsetY = -1;
_fontSize = 24;
_glyphWidth = (int)(0.7 * _fontSize);
_glyphHeight = (int)(1.5 * _fontSize);
_bitmapFont = false;
_fontName = "Consolas";
_charXSpacing = _glyphWidth - 1;
_shaders = shaders;
}
/// <summary>
/// Initializes a new instance of the <see cref="Chart"/> class.
/// </summary>
/// <param name="shaders">The shaders.</param>
public Chart(Shaders shaders)
{
_glBorder = new GL_Border(Color.Black, shaders);
}