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public:t-gede-15-1:lab3 [2015/01/25 17:41] – created marinopublic:t-gede-15-1:lab3 [2024/04/29 13:33] (current) – external edit 127.0.0.1
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 ===== Discussion ===== ===== Discussion =====
  
-Discussion thread for this lab is here: [[https://piazza.com/class/hq7dlipqggr2qe?cid=8|Lab 3 Discussion Thread]]+Discussion thread for this lab is here: [[https://piazza.com/class/i4l9of1fw8j3ew?cid=32|Lab 3 Discussion Thread]]
  
 ===== Goal ====== ===== Goal ======
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 } }
 </code> </code>
-  - **Instantiate Effect and Update from FrameListener** Now you have to create an instance of your effect, passing the Cube entity into it's constructor, giving it initial position and velocity values, and finally make sure to call this effect's update function in every frame, e.g. inside the FrameListener's ''frameStarted'' method (note that you'll have to pass a pointer to this effect into the FrameListener constructor so that it knows about it). Don't forget to delete your effect instance in the destructor of your application!+  - **Instantiate Effect and Update from FrameListener** Now you have to create an instance of your effect, passing the Cube entity into it's constructor, giving it initial position and velocity values, and finally make sure to call this effect's update function in every frame, e.g. inside the FrameListener's ''frameStarted'' method (note that you'll have to pass a pointer to this effect into the FrameListener constructor so that it knows about it). Don't forget to delete your effect instance in the destructor of your application!  
 +  - **Make the cube move in a non linear path**, Now the cube moves linearly upward rotating around Sinbad, make the cube move non linearly, explore the use of cosine function with time on the cubes radius, height or velocity for interesting results.
  
 +===== Bonus points! =====
 <box green 100% | **Bonus Pts!** > <box green 100% | **Bonus Pts!** >
   - **Activate Only when Facing Ogre** To know if an object is in front of the camera, you can apply a simple dot product test. Take the vector between the camera and the object (use vector subtraction) and call that **V**. Now take the dot product between **V** and the facing vector **F** of the camera (''Ogre::Vector3 F = _Cam->getDirection();''). If this dot product is greater than 0, you know the object is in front of the camera. Finally, why don't you also check to see if the object is relatively close to the camera (you can use the Ogre::Vector3::length() method). Now you can add this to your project such that the special effect only gets updated when these two checks are passed! :-)   - **Activate Only when Facing Ogre** To know if an object is in front of the camera, you can apply a simple dot product test. Take the vector between the camera and the object (use vector subtraction) and call that **V**. Now take the dot product between **V** and the facing vector **F** of the camera (''Ogre::Vector3 F = _Cam->getDirection();''). If this dot product is greater than 0, you know the object is in front of the camera. Finally, why don't you also check to see if the object is relatively close to the camera (you can use the Ogre::Vector3::length() method). Now you can add this to your project such that the special effect only gets updated when these two checks are passed! :-)
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 So the coordinate would be like (angle,radius,angle) = (Θ,r,α) So the coordinate would be like (angle,radius,angle) = (Θ,r,α)
 X coordinate = sin(α) times cos(Θ) times r X coordinate = sin(α) times cos(Θ) times r
-Y coordinate = cos(α) times r  // This was Cos of Θ, which was wrong :(+Y coordinate = cos(α) times r
 Z coordinate = sin(α) sin(Θ) times r Z coordinate = sin(α) sin(Θ) times r
 </code> And find some interesting way to make the spherical movement random :-) </code> And find some interesting way to make the spherical movement random :-)
/var/www/cadia.ru.is/wiki/data/attic/public/t-gede-15-1/lab3.1422207699.txt.gz · Last modified: 2024/04/29 13:32 (external edit)
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