public static Ray GetPickRay(int x, int y, ViewportF viewport, Matrix worldViewProjection)
{
Vector3 vector1 = new Vector3((float)x, (float)y, 0.0f);
Vector3 vector2 = new Vector3((float)x, (float)y, 1f);
Vector3 position = Vector3.Unproject(vector1, viewport.X, viewport.Y, viewport.Width, viewport.Height, viewport.MinDepth, viewport.MaxDepth, worldViewProjection);
Vector3 direction = Vector3.Unproject(vector2, viewport.X, viewport.Y, viewport.Width, viewport.Height, viewport.MinDepth, viewport.MaxDepth, worldViewProjection) - position;
direction.Normalize();
return(new Ray(position, direction));
}
/// <summary>
/// Calculates a world space <see cref="SharpDX.Ray"/> from 2d screen coordinates.
/// </summary>
/// <param name="x">X coordinate on 2d screen.</param>
/// <param name="y">Y coordinate on 2d screen.</param>
/// <param name="viewport"><see cref="SharpDX.ViewportF"/>.</param>
/// <param name="worldViewProjection">Transformation <see cref="SharpDX.Matrix"/>.</param>
/// <returns>Resulting <see cref="SharpDX.Ray"/>.</returns>
public static Ray GetPickRay(int x, int y, ViewportF viewport, Matrix worldViewProjection)
{
var nearPoint = new Vector3(x, y, 0);
var farPoint = new Vector3(x, y, 1);
nearPoint = Vector3.Unproject(nearPoint, viewport.X, viewport.Y, viewport.Width, viewport.Height, viewport.MinDepth,
viewport.MaxDepth, worldViewProjection);
farPoint = Vector3.Unproject(farPoint, viewport.X, viewport.Y, viewport.Width, viewport.Height, viewport.MinDepth,
viewport.MaxDepth, worldViewProjection);
Vector3 direction = farPoint - nearPoint;
direction.Normalize();
return(new Ray(nearPoint, direction));
}