private bool GetScreenspaceCoords(MovableObject mo, Camera camera, out Vector2 result)
{
result = Vector2.ZERO;
//if (!mo.IsInScene)
//{
// return false;
//}
var optimizedAabb = mo.WorldAabbUpdated;
var aabb = new AxisAlignedBox(optimizedAabb.Minimum, optimizedAabb.Maximum);
var point = this.offset
+ (aabb.GetCorner(AxisAlignedBox.CornerEnum.FAR_LEFT_BOTTOM)
+ aabb.GetCorner(AxisAlignedBox.CornerEnum.FAR_RIGHT_BOTTOM)
+ aabb.GetCorner(AxisAlignedBox.CornerEnum.NEAR_LEFT_BOTTOM)
+ aabb.GetCorner(AxisAlignedBox.CornerEnum.NEAR_RIGHT_BOTTOM)) / 4;
// Is the camera facing that point? If not, return false
var cameraPlane = new Plane(camera.DerivedOrientation.ZAxis, camera.DerivedPosition);
if (cameraPlane.GetSide(point) != Plane.Side.NEGATIVE_SIDE)
{
return(false);
}
// Transform the 3D point into screen space
point = camera.ProjectionMatrix * (camera.ViewMatrix * point);
// Transform from coordinate space [-1, 1] to [0, 1] and update in-value
result.x = (point.x / 2) + 0.5f;
result.y = 1 - ((point.y / 2) + 0.5f);
return(true);
}
