projection

I am trying some code out from a NH 3.0 Cookbook, and wondering why I can't get the code below to compile. I think the QueryProjectionBuilder that should make this work is in "NHibernate.Criterion.Lambda" but the using directive for it doesn't help. The problems are the SelectGroup and SelectAvg parts. Assuming the syntax from the book is correct, can anyone see a missing reference here? namespace Queries.Implementations { using System; using System.Collections.Generic; using System.Linq; using Eg.Core; using NHibernate; using NHibernate.Criterion; using NHibernate.Criterion.Lambda; public

I have a JPA tree structure @Entity public class Document { @Id @GeneratedValue(strategy = GenerationType.AUTO) private int id; private String text; @ManyToOne @JoinColumn(name = "parent") Document parent; @OneToMany(mappedBy = "parent", fetch = FetchType.EAGER) Set<Document> children; (getters and setters) } and a projection @Projection(name = "all", types = Document.class) public interface AllDocumentsProjection { int getId(); String getText(); Set<Document> getChildren(); } When I make a GET request with url localhost:8080/documents/1?projection=all I only get the first children of the root

I am confused about perspective projection. Here is the scenario that is confusing me. My frustrum's front plane is basically positioned at at positive z-axis and the back plane at a negative axis and rotated about some deg along the posive z-axis. Now, whenever I go through examples I see that the near and the far plane are all present in the negative z axis. My approach in this case was basically something like: glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustrum(-xval,+xval,-yval,+yval,-10,+10); gluLookAt(); // some point lying on this axis of symmetry about the point glMatrixMode(GL

I have problem or well, I do not know how to transform 3d point with x,y,z values to 2d point, I have to draw projection, where I do have x,y,z values for points but I don't know how to transform them into 2d so I can move them onto my axis. I have been looking around wiki and google, howevever I'm not quite sure which matrix transformations should I use to get wanted result. Let's first assume the camera looking at your scene is centered at the origin, and looking at the -z direction. Then: a perspective projection is given by: x' = x/z y' = y/z an orthographic projection is given by: x' = x

Normally the definition of a projection matrix P is the 3x4 matrix which projects point from world coordinates to image/pixel coordinates. The projection matrix can be split up into: K : a 3x4 camera matrix K with the intrinsic parameters T : a 4x4 transformation matrix with the extrinsic parameters The projection matrix is then P = K * T . What are the clear definitions of the following input to OpenCV's stereoRectify: cameraMatrix1 – First camera matrix (I assume it is the instrinsic K part of the projection matrix, correct?) . R – Rotation matrix between the coordinate systems of the first