It looks like you're new here. If you want to get involved, click one of these buttons!

- 141K All Categories
- 103.7K Programming Languages
- 6.5K Assembler Developer
- 1.9K Basic
- 40K C and C++
- 2.9K C#
- 7.9K Delphi and Kylix
- 4 Haskell
- 9.7K Java
- 4.1K Pascal
- 1.3K Perl
- 2K PHP
- 550 Python
- 37 Ruby
- 4.4K VB.NET
- 1.6K VBA
- 20.9K Visual Basic
- 2.6K Game programming
- 317 Console programming
- 92 DirectX Game dev
- 1 Minecraft
- 112 Newbie Game Programmers
- 2 Oculus Rift
- 9K Applications
- 1.8K Computer Graphics
- 742 Computer Hardware
- 3.4K Database & SQL
- 535 Electronics development
- 1.6K Matlab
- 628 Sound & Music
- 258 XML Development
- 3.3K Classifieds
- 199 Co-operative Projects
- 198 For sale
- 190 FreeLance Software City
- 1.9K Jobs Available
- 603 Jobs Wanted
- 209 Wanted
- 2.9K Microsoft .NET
- 1.8K ASP.NET
- 1.1K .NET General
- 3.4K Miscellaneous
- 8 Join the Team
- 355 Comments on this site
- 70 Computer Emulators
- 2.1K General programming
- 187 New programming languages
- 627 Off topic board
- 209 Mobile & Wireless
- 81 Android
- 126 Palm Pilot
- 339 Multimedia
- 155 Demo programming
- 184 MP3 programming
- Bash scripts
- 27 Cloud Computing
- 53 FreeBSD
- 1.7K LINUX programming
- 370 MS-DOS
- Shell scripting
- 321 Windows CE & Pocket PC
- 4.1K Windows programming
- 942 Software Development
- 417 Algorithms
- 68 Object Orientation
- 92 Project Management
- 95 Quality & Testing
- 269 Security
- 7.7K WEB-Development
- 1.8K Active Server Pages
- 62 AJAX
- 4 Bootstrap Themes
- 55 CGI Development
- 28 ColdFusion
- 224 Flash development
- 1.4K HTML & WEB-Design
- 1.4K Internet Development
- 2.2K JavaScript
- 37 JQuery
- 307 WEB Servers
- 150 WEB-Services / SOAP

TheGreenFalcon
Member Posts: **7**

Hi, here's my problem

i have a point (x,y,z) which is a look-from point of a camera

and the angles around the axis (AngX,AngY,AngZ). I want to determine the vector of the direction of where the camera look, or the lookAt point.

I'm not good at all in mathematics

Help me Please

i hope my english is not too bad

Thkx

i have a point (x,y,z) which is a look-from point of a camera

and the angles around the axis (AngX,AngY,AngZ). I want to determine the vector of the direction of where the camera look, or the lookAt point.

I'm not good at all in mathematics

Help me Please

i hope my english is not too bad

Thkx

Terms of use / Privacy statement / Publisher: Lars Hagelin

Programmers Heaven articles / Programmers Heaven files / Programmers Heaven uploaded content / Programmers Heaven C Sharp ebook / Operated by CommunityHeaven

© 1997-2015 Programmersheaven.com - All rights reserved.

## Comments

272If you have a point (x,y,z), and you also know the direction that it is facing,

then you can express the entire statement as a single equation:

r = (x, y, z) + t(a, b, c)

where the (a, b, c) is a vector that describes the direction that the camera is

facing, from the origin (0, 0, 0).

So once you have worked out the simplest direction vector for the camera, then

you have an equation of a line for the camera's view, and you can use that

equation to find the point that is seen by the camera.

To find any general point, then just replace t with a number and you will get a

point, and if you have a point, see if it can fit into the equation, and if it can

then the camera can see it.

If you have any more problems with this, send an e-mail to

yizk_man@hotmail.com

42:

: i have a point (x,y,z) which is a look-from point of a camera

: and the angles around the axis (AngX,AngY,AngZ). I want to determine the vector of the direction of where the camera look, or the lookAt point.

: I'm not good at all in mathematics

: Help me Please

: i hope my english is not too bad

: Thkx

:

There's an angle that doesn't affect the looking point, which is called roll angle. You must know the rotation order because this can affect the final result, and the axis system is important too because each one gives a different result. So you can give more details on your axis system and angles description and rotation order. For example the earth can be described with spherical coordinates system, and you can imagine the center is the look-from point of your camera, and one city in the surface is the looking point, so longitude and lattitude can give you the vector, for example the projection of that vector in the vertical axis of the earth gives you the Y component of your vector, so it can be

R * sin ( latitude )