public override ILPoint3Df Screen2World2D(int x, int y)
{
Vector3 tmp;
Glu.UnProject(new Vector3(x, y, 0), m_modelViewMatrix, m_projMatrix, m_viewMatrix, out tmp);
return(new ILPoint3Df(tmp.X, tmp.Y, m_clippingView.CenterF.Z));
}
/// <summary>
/// transform from screen space into world space using OpenGL
/// </summary>
/// <param name="x">screen X</param>
/// <param name="y">screen Y</param>
/// <returns>world coord</returns>
public override void Screen2World(int x, int y, out ILPoint3Df nearClip, out ILPoint3Df farClip)
{
// TODO: check the Z coord values. 0.68 here was result of trial only!
Vector3 far, near;
Glu.UnProject(new Vector3(x, y, 0.0f), m_modelViewMatrix, m_projMatrix, m_viewMatrix, out near);
Glu.UnProject(new Vector3(x, y, 1.0f), m_modelViewMatrix, m_projMatrix, m_viewMatrix, out far);
// transform back from unit cube to clipping view
farClip = new ILPoint3Df(far.X, far.Y, far.Z); //m_clippingView.Map(far.X, far.Y, far.Z);
nearClip = new ILPoint3Df(near.X, near.Y, near.Z); //m_clippingView.Map(near.X, near.Y, near.Z);
}
public void GetScreenPoint(int x, int y, Matrix4 model, out Vector3 p1, out Vector3 p2)
{
LoadTransformation(model);
double[] modelMatrix = new double[16];
double[] projmatrix = new double[16];
int[] viewport = new int[4];
GL.GetInteger(GetPName.Viewport, viewport);
GL.GetDouble(GetPName.ModelviewMatrix, modelMatrix);
GL.GetDouble(GetPName.ProjectionMatrix, projmatrix);
y = height - y; // OpenGL renders with (0,0) on bottom, mouse reports with (0,0) on top
Glu.UnProject(new Vector3(x, y, 0.1f), modelMatrix, projmatrix, viewport, out p1);
Glu.UnProject(new Vector3(x, y, 1.0f), modelMatrix, projmatrix, viewport, out p2);
}
