/// <summary>
/// Create device and renderbuffer, initialize NV_DX_interop and start rendering.
/// </summary>
private void StartRendering()
{
_gl = new OpenGL();
_hwnd = new HwndSource(0, 0, 0, 0, 0, "test", IntPtr.Zero).Handle;
_gl.Create(SharpGL.Version.OpenGLVersion.OpenGL2_1, RenderContextType.HiddenWindow, 1, 1, 32, _hwnd);
// Set the most basic OpenGL styles.
_gl.ShadeModel(OpenGL.GL_SMOOTH);
_gl.ClearColor(0.0f, 0.0f, 0.0f, 1.0f);
_gl.ClearDepth(1.0f);
_gl.Enable(OpenGL.GL_BLEND);
_gl.Disable(OpenGL.GL_DEPTH_TEST);
_gl.Enable(OpenGL.GL_TEXTURE_2D);
_gl.TexEnv(OpenGL.GL_TEXTURE_ENV, OpenGL.GL_TEXTURE_ENV_MODE, OpenGL.GL_REPLACE);
_gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
//_gl.Enable(OpenGL.GL_MULTISAMPLE);
//_gl.Enable(OpenGL.GL_MULTISAMPLE_ARB);
_gl.Hint(0x8534, OpenGL.GL_FASTEST);
ResizeRendering();
// leverage the Rendering event of WPF's composition target to
// update the custom D3D scene
CompositionTarget.Rendering += OnRenderOpenGL;
if (GLInitialize != null)
GLInitialize(this, new EventArgs());
}
protected void BeforeRendering(OpenGL gl, RenderMode renderMode)
{
IScientificCamera camera = this.camera;
if (camera != null)
{
if (camera.CameraType == CameraTypes.Perspecitive)
{
IPerspectiveViewCamera perspective = camera;
this.projectionMatrix = perspective.GetProjectionMat4();
this.viewMatrix = perspective.GetViewMat4();
}
else if (camera.CameraType == CameraTypes.Ortho)
{
IOrthoViewCamera ortho = camera;
this.projectionMatrix = ortho.GetProjectionMat4();
this.viewMatrix = ortho.GetViewMat4();
}
else
{ throw new NotImplementedException(); }
}
modelMatrix = glm.scale(mat4.identity(), new vec3(1, 1, this.ZAxisScale));
gl.Enable(OpenGL.GL_VERTEX_PROGRAM_POINT_SIZE);
gl.Enable(OpenGL.GL_POINT_SPRITE_ARB);
gl.TexEnv(OpenGL.GL_POINT_SPRITE_ARB, OpenGL.GL_COORD_REPLACE_ARB, OpenGL.GL_TRUE);
gl.Enable(OpenGL.GL_POINT_SMOOTH);
gl.Hint(OpenGL.GL_POINT_SMOOTH_HINT, OpenGL.GL_NICEST);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendEquation(OpenGL.GL_FUNC_ADD_EXT);
gl.BlendFuncSeparate(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA, OpenGL.GL_ONE, OpenGL.GL_ONE);
ShaderProgram shaderProgram = this.shaderProgram;
int[] viewport = new int[4];
gl.GetInteger(OpenGL.GL_VIEWPORT, viewport);
shaderProgram.Bind(gl);
shaderProgram.SetUniformMatrix4(gl, "projectionMatrix", projectionMatrix.to_array());
shaderProgram.SetUniformMatrix4(gl, "viewMatrix", viewMatrix.to_array());
shaderProgram.SetUniformMatrix4(gl, "modelMatrix", modelMatrix.to_array());
shaderProgram.SetUniform1(gl, "canvasWidth", viewport[2] + 0.0f);
shaderProgram.SetUniform1(gl, "canvasHeight", viewport[3] + 0.0f);
shaderProgram.SetUniform1(gl, "opacity", this.Opacity);
this.texture.Bind(gl);
shaderProgram.SetUniform1(gl, "tex", this.texture.TextureName);
shaderProgram.SetUniform1(gl, "brightness", this.Brightness);
}