/// <summary>
/// Called when the 3D Engine wishes to render this element. This is where geometry must be drawn to the 3D scene
/// </summary>
/// <param name="e">The <see cref="IRenderPassInfo3D" /> containing parameters for the current render pass.</param>
public override void RenderScene(IRenderPassInfo3D e)
{
if (_font == null)
{
return;
}
var currentCamera = RootSceneEntity != null ? RootSceneEntity.Viewport3D.CameraController : null;
switch (_textDisplayMode)
{
case TextDisplayMode.Default:
{
// Just display text
_font.Begin();
_font.AddText(Text, _textColor, Location.X, Location.Y, Location.Z);
_font.End();
break;
}
case TextDisplayMode.FacingCameraAlways:
{
if (currentCamera == null)
{
goto case TextDisplayMode.Default;
}
// Display billboarded text using camera vectors
Vector3 cameraFwd = currentCamera.Forward;
Vector3 cameraUp = currentCamera.Up;
// Compute a side vector
Vector3 cameraSide = cameraFwd ^ cameraUp;
cameraSide.Normalize();
// Compute orthogonal up vector
cameraUp = cameraSide ^ cameraFwd;
cameraUp.Normalize();
// Display text billboarded using camera side, up vectors (text will always face camera)
_font.BeginBillboard(cameraSide, cameraUp);
_font.AddText(Text, _textColor, Location.X, Location.Y, Location.Z);
_font.End();
break;
}
case TextDisplayMode.SacreenSpace:
{
// Screen space text 2D
_font.BeginScreenSpace((float)RotationAngle, Location.X, Location.Y);
_font.AddText(Text, _textColor, Location.X, Location.Y, Location.Z);
_font.EndScreenSpace();
break;
}
default:
throw new ArgumentOutOfRangeException();
}
}
/// <summary>
/// Called when the 3D Engine wishes to render this element. This is where geometry must be drawn to the 3D scene
/// </summary>
/// <param name="rpi">The <see cref="IRenderPassInfo3D" /> containing parameters for the current render pass.</param>
public override void RenderScene(IRenderPassInfo3D rpi)
{
var currentCamera = RootSceneEntity != null ? RootSceneEntity.Viewport3D.CameraController : null;
var locX = Location.X;
var locY = Location.Y;
var locZ = Location.Z;
// Commented code belove is the example of treating the Location value
// as 3D point in Data Coordinates Space but not in World Coordinates Space
//locX = (float)e.XCalc.GetCoordinate(Location.X) - e.WorldDimensions.X / 2.0f;
//locY = (float)e.YCalc.GetCoordinate(Location.Y);
//locZ = (float)e.ZCalc.GetCoordinate(Location.Z) - e.WorldDimensions.Z / 2.0f;
switch (_textDisplayMode)
{
case TextDisplayMode.Default:
{
// Just display text
_font.Begin();
_font.AddText(Text, _textColor, locX, locY, locZ);
_font.End();
break;
}
case TextDisplayMode.FacingCameraAlways:
{
if (currentCamera == null)
{
goto case TextDisplayMode.Default;
}
// Display billboarded text using camera vectors
Vector3 cameraFwd = currentCamera.Forward;
Vector3 cameraUp = currentCamera.Up;
// Compute a side vector
Vector3 cameraSide = cameraFwd ^ cameraUp;
cameraSide.Normalize();
// Compute orthogonal up vector
cameraUp = cameraSide ^ cameraFwd;
cameraUp.Normalize();
// Display text billboarded using camera side, up vectors (text will always face camera)
_font.BeginBillboard(cameraSide, cameraUp);
_font.AddText(Text, _textColor, locX, locY, locZ);
_font.End();
break;
}
case TextDisplayMode.SacreenSpace:
{
// Screen space text 2D
_font.BeginScreenSpace((float)RotationAngle, Location.X, Location.Y);
_font.AddText(Text, _textColor, locX, locY, locZ);
_font.EndScreenSpace();
break;
}
default:
throw new ArgumentOutOfRangeException();
}
}