orthographics parallel projection

This is a discussion on orthographics parallel projection within the Game Programming forums, part of the General Programming Boards category; I am trying to draw a bezier surface using orthographic paralle projection to view the surface. VRP (0,0,0) and VPN ...

  1. #1
    Registered User
    Join Date
    Jan 2011
    Posts
    141

    orthographics parallel projection

    I am trying to draw a bezier surface using orthographic paralle projection to view the surface. VRP (0,0,0) and VPN is (0,0,-1).

    I'm just trying to see where my eyes are located and in which direction Im viewing the object

    Is the following figure correct? My eyes are located at VRP (0,0,0) (red circle) looking at the -z side. VPN is in green. Object is yellow.

    http://i45.tinypic.com/i4pc35.png

  2. #2
    Programming Wraith GReaper's Avatar
    Join Date
    Apr 2009
    Location
    Greece
    Posts
    1,602
    When orthographically projecting you collapse all points on a surface. If that surface is the (0, 0, +/-1), all you have to do is make the Z coords zero.
    Devoted my life to programming...

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Matrices Confusion (MODELVIEW / PROJECTION)
    By Jake.c in forum Game Programming
    Replies: 1
    Last Post: 08-21-2009, 09:09 PM
  2. understanding projection matrix elements
    By Anddos in forum Game Programming
    Replies: 3
    Last Post: 07-26-2009, 03:35 PM
  3. Movie Theatre projection technology
    By VirtualAce in forum A Brief History of Cprogramming.com
    Replies: 3
    Last Post: 04-09-2007, 02:56 AM
  4. direct x creating projection matrix
    By Rune Hunter in forum Game Programming
    Replies: 2
    Last Post: 11-05-2005, 08:09 PM
  5. Astral projection & lucid dreaming
    By Series X4 1.0 in forum A Brief History of Cprogramming.com
    Replies: 3
    Last Post: 01-18-2002, 07:39 AM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21