/// Color Scale
private void DrawColorScale(object sender, SharpGL.WPF.OpenGLRoutedEventArgs args)
{
OpenGL gl = ColorScaleControl.OpenGL;
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
float w = (float)ColorScaleControl.ActualWidth;
float h = (float)ColorScaleControl.ActualHeight;
gl.Viewport(0, 0, (int)w, (int)h);
gl.MatrixMode(MatrixMode.Projection);
gl.LoadIdentity();
gl.MatrixMode(MatrixMode.Modelview);
gl.LoadIdentity();
gl.Begin(BeginMode.QuadStrip);
gl.Color(0.0f, 0.0f, 1.0f); // Blue
gl.Vertex(-0.05f, 0.0f, 0.0f);
gl.Vertex(-0.05f, 1.0f, 0.0f);
gl.Color(0.0f, 1.0f, 1.0f); // Cyan
gl.Vertex(0.15f, 0.0f, 0.0f);
gl.Vertex(0.15f, 1.0f, 0.0f);
gl.Color(0.0f, 1.0f, 0.0f); // Green
gl.Vertex(0.35f, 0.0f, 0.0f);
gl.Vertex(0.35f, 1.0f, 0.0f);
gl.Color(1.0f, 1.0f, 0.0f); // Yellow
gl.Vertex(0.55f, 0.0f, 0.0f);
gl.Vertex(0.55f, 1.0f, 0.0f);
gl.Color(1.0f, 0.5f, 0.0f); // Orange
gl.Vertex(0.75f, 0.0f, 0.0f);
gl.Vertex(0.75f, 1.0f, 0.0f);
gl.Color(1.0f, 0.0f, 0.0f); // Red
gl.Vertex(0.95f, 0.0f, 0.0f);
gl.Vertex(0.95f, 1.0f, 0.0f);
gl.End();
gl.Begin(BeginMode.Lines);
gl.Color(1.0f, 1.0f, 1.0f); // White
gl.Vertex(-0.05f, -0.2f, 0.0f);
gl.Vertex(-0.05f, -0.7f, 0.0f);
gl.Vertex(0.95f, -0.2f, 0.0f);
gl.Vertex(0.95f, -0.7f, 0.0f);
gl.Vertex(-0.05f, -0.4f, 0.0f);
gl.Vertex(0.95f, -0.4f, 0.0f);
//gl.DrawText(-1, 0, 128.0f, 128.0f, 128.0f, "Arial", 1.0f, "Drawing maze");
gl.End();
gl.Flush();
}
/// Main OpenGL program
private void OpenGLDraw(object sender, SharpGL.WPF.OpenGLRoutedEventArgs args)
{
// Enable finish button
if (openFileOk && dispCBOk)
{
finish_btn.IsEnabled = true;
}
else
{
finish_btn.IsEnabled = false;
}
// Get the OpenGL object
OpenGL gl = GLControl.OpenGL;
// Set The Material Color
float[] glfMaterialColor = new float[] { 0.4f, 0.2f, 0.8f, 1.0f };
float w = (float)GLControl.ActualWidth;
float h = (float)GLControl.ActualHeight;
// Perspective projection
gl.Viewport(0, 0, (int)w, (int)h);
gl.Ortho(0, w, 0, h, -100, 100);
// Clear The Screen And The Depth Buffer
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
gl.Material(OpenGL.GL_FRONT_AND_BACK, OpenGL.GL_AMBIENT_AND_DIFFUSE, glfMaterialColor);
gl.MatrixMode(MatrixMode.Modelview);
gl.LoadIdentity();
gl.Scale(scale, scale, 1);
// Camera Position
gl.LookAt(_position[0], _position[1], _position[2],
_viewPoint[0], _viewPoint[1], _viewPoint[2],
_upVector[0], _upVector[1], _upVector[2]);
// Draw the helix
float[][] points = vertexes.ToArray();
Helix(points.Length, points);
}