Comments on: 22. OpenGL Camera http://www.swiftless.com/tutorials/opengl/camera.html Game Programming and Computer Graphics Tutorials Wed, 01 Feb 2012 09:19:36 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Oskar http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-4193 Oskar Fri, 06 Jan 2012 13:32:06 +0000 http://swiftless.com/wordpress/?p=189#comment-4193 Hi how do change the sensetivity? Hi how do change the sensetivity?

]]> By: Asyx http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-3880 Asyx Sat, 24 Dec 2011 17:36:47 +0000 http://swiftless.com/wordpress/?p=189#comment-3880 Shouldn't "-positionx[i+1]" be an error? It would be out of range in the last round. Shouldn’t “-positionx[i+1]” be an error? It would be out of range in the last round.

]]> By: DukeH http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-2047 DukeH Tue, 09 Aug 2011 09:11:44 +0000 http://swiftless.com/wordpress/?p=189#comment-2047 Zilot, his calculation works because it creates a new position vector that is pointing the same direction as the old. If you were to simply add 0.9 then you wouldn't be traveling in the same direction that the camera is facing. To see what I mean, try adding a larger number like 10 instead... the camera rotates instead of moving forward as intended. A problem I see is that the speed in which the camera moves varies depending on the values of yrot and xrot to a small extent, it isn't significant for this program but if the camera's speed is ever to be scaled up then it may become more noticeable. An alternative would be to add one unit vector in the direction the camera is facing, ie divide the position vector by it's magnitude then add that vector to the original position vector. That way it's easier to program the exact speed you want and avoids using sine and cosine. The drawback is more CPU calculations are required, however. Thanks for the tutorial, Swiftless, it made much more sense then everything else I've found. Zilot, his calculation works because it creates a new position vector that is pointing the same direction as the old. If you were to simply add 0.9 then you wouldn’t be traveling in the same direction that the camera is facing. To see what I mean, try adding a larger number like 10 instead… the camera rotates instead of moving forward as intended.

A problem I see is that the speed in which the camera moves varies depending on the values of yrot and xrot to a small extent, it isn’t significant for this program but if the camera’s speed is ever to be scaled up then it may become more noticeable.

An alternative would be to add one unit vector in the direction the camera is facing, ie divide the position vector by it’s magnitude then add that vector to the original position vector. That way it’s easier to program the exact speed you want and avoids using sine and cosine. The drawback is more CPU calculations are required, however.

Thanks for the tutorial, Swiftless, it made much more sense then everything else I’ve found.

]]> By: 10 Camera Html Sites | Digital Cameras Online http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1807 10 Camera Html Sites | Digital Cameras Online Mon, 20 Jun 2011 09:07:48 +0000 http://swiftless.com/wordpress/?p=189#comment-1807 [...] 22. OpenGL Camera | Swiftless TutorialsIf you look at making any game where the scene is larger than can be displayed in the window at once, [...] [...] 22. OpenGL Camera | Swiftless TutorialsIf you look at making any game where the scene is larger than can be displayed in the window at once, [...]

]]> By: zilot http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1773 zilot Mon, 13 Jun 2011 12:15:29 +0000 http://swiftless.com/wordpress/?p=189#comment-1773 also when i changed this line zpos -= float(cos(yrotrad)) ; by this one zpos -= 0.9 ; only difference is speed i don't know why we need to put trigonometry? also when i changed this line zpos -= float(cos(yrotrad)) ; by this one zpos -= 0.9 ; only difference is speed
i don’t know why we need to put trigonometry?

]]> By: zilot http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1772 zilot Mon, 13 Jun 2011 12:10:24 +0000 http://swiftless.com/wordpress/?p=189#comment-1772 hi swifless first thx for this tutorial i m a bit confused when press w and s button and when i removed this lines from the code xpos += float(sin(yrotrad)) ; ypos -= float(sin(xrotrad)) ; it really gave the same result as when they exist i haven't understand their role? hi swifless first thx for this tutorial
i m a bit confused when press w and s button and when i removed this lines from the code
xpos += float(sin(yrotrad)) ;
ypos -= float(sin(xrotrad)) ;
it really gave the same result as when they exist i haven’t understand their role?

]]> By: Simple OpenGL Keyboard and Mouse FPS Controls | r3dux.org http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1646 Simple OpenGL Keyboard and Mouse FPS Controls | r3dux.org Fri, 13 May 2011 00:15:52 +0000 http://swiftless.com/wordpress/?p=189#comment-1646 [...] OpenGL SuperBible and did some googling, where I came across Swiftless‘ camera tutorials (Part 1, Part 2, Part 3) which gave me a really good start (Thank you, Swiftless!) on how to manipulate the [...] [...] OpenGL SuperBible and did some googling, where I came across Swiftless‘ camera tutorials (Part 1, Part 2, Part 3) which gave me a really good start (Thank you, Swiftless!) on how to manipulate the [...]

]]> By: triplea http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1631 triplea Thu, 28 Apr 2011 09:15:37 +0000 http://swiftless.com/wordpress/?p=189#comment-1631 i hope you can post some screenshot for each tutorial so that we can understand more clearly what it does...:) i hope you can post some screenshot for each tutorial so that we can understand more clearly what it does…:)

]]> By: Dr. Pepper http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1570 Dr. Pepper Thu, 17 Mar 2011 01:17:25 +0000 http://swiftless.com/wordpress/?p=189#comment-1570 Just wanted to say thanks for this tutorial. I completely overlooked using radians, and everything was acting weird. Thanks! Just wanted to say thanks for this tutorial. I completely overlooked using radians, and everything was acting weird. Thanks!

]]> By: coderbill http://www.swiftless.com/tutorials/opengl/camera.html/comment-page-1#comment-1538 coderbill Wed, 02 Mar 2011 03:57:03 +0000 http://swiftless.com/wordpress/?p=189#comment-1538 Thanks so much! Got this running in no time. Thanks for sharing... it's so refreshing.. Thanks so much! Got this running in no time. Thanks for sharing… it’s so refreshing..

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