/// <summary>
/// Transform a 3d point coordinate into its screen position.
/// </summary>
/// <param name="point">3D model coordinate</param>
/// <returns>2D screen coordinate</returns>
public Coord3d ModelToScreen(Coord3d point)
{
Vector4d screencoord = default(Vector4d);
if (!Glut.Glut.Project(new Vector4d(point.x, point.y, point.z, 0), getModelViewAsMatrix4d(), getProjectionAsMatrix4d(), getViewPortAsDouble(), ref screencoord))
{
FailedProjection("Could not retrieve model coordinates in screen " + point.ToString() + ".");
}
return(new Coord3d(screencoord.X, screencoord.Y, screencoord.Z));
}
public override Maths.BoundingBox3d drawText(Rendering.View.Camera cam, string s, Maths.Coord3d position, Align.Halign halign, Align.Valign valign, Colors.Color color, Maths.Coord2d screenOffset, Maths.Coord3d sceneOffset)
{
GL.Color3(color.r, color.g, color.b);
Coord3d posScreen = cam.ModelToScreen(position);
float strlen = Glut.Glut.BitmapLength(_font, s);
float x = 0;
float y = 0;
switch (halign)
{
case Align.Halign.RIGHT:
x = (float)posScreen.x;
break;
case Align.Halign.CENTER:
x = (float)(posScreen.x - strlen / 2);
break;
case Align.Halign.LEFT:
x = (float)(posScreen.x - strlen);
break;
default:
throw new Exception("Unsupported halign value");
}
switch (valign)
{
case Align.Valign.TOP:
y = (float)(posScreen.y);
break;
case Align.Valign.GROUND:
y = (float)(posScreen.y);
break;
case Align.Valign.CENTER:
y = (float)(posScreen.y - _fontHeight / 2);
break;
case Align.Valign.BOTTOM:
y = (float)(posScreen.y - _fontHeight);
break;
default:
throw new Exception("Unsupported valign value");
}
Coord3d posScreenShifted = new Coord3d(x + screenOffset.x, y + screenOffset.y, posScreen.z);
Coord3d posReal = default(Coord3d);
try {
posReal = cam.ScreenToModel(posScreenShifted);
// TODO: really solve this bug due to a Camera.PERSPECTIVE mode
} catch (Exception ex) {
Console.WriteLine("TextBitmap.drawText(): could not process text position: " + posScreen.ToString() + " " + posScreenShifted.ToString());
return(new BoundingBox3d());
}
// Draw actual string
GL.RasterPos3(posReal.x + sceneOffset.x, posReal.y + sceneOffset.y, posReal.z + sceneOffset.z);
Glut.Glut.BitmapString(_font, s);
// Compute bounds of text
Coord3d botLeft = new Coord3d();
Coord3d topRight = new Coord3d();
botLeft.x = posScreenShifted.x;
botLeft.y = posScreenShifted.y;
botLeft.z = posScreenShifted.z;
topRight.x = botLeft.x + strlen;
topRight.y = botLeft.y + _fontHeight;
topRight.z = botLeft.z;
BoundingBox3d txtBounds = new BoundingBox3d();
txtBounds.@add(cam.ScreenToModel(botLeft));
txtBounds.@add(cam.ScreenToModel(topRight));
return(txtBounds);
}
public string toString(int depth)
{
return(Utils.blanks(depth) + "(Point) coord={" + _xyz.ToString() + "}, color={" + _rgb.ToString() + "}");
}
public override string ToString()
{
return("(Scale)" + _scale.ToString());
}
