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2014/10/15 ¤U¤È 10:11:19

iphone Programming Glossary: maths

Drifting yaw angle after moving fast

http://stackoverflow.com/questions/13613239/drifting-yaw-angle-after-moving-fast

with the gravity vector rather than CMAttitude.quaternion because most people are not that amused about quaternion maths Thus any future bugs related to the gravity vector will probably be fixed during the beta phase because of a larger number..

finding a coordinate at some distance from the source

http://stackoverflow.com/questions/14398378/finding-a-coordinate-at-some-distance-from-the-source

this is correct place for this question or i need to find some other section where I can find questions related to maths. Any help will be great. Thanks Pankaj iphone math map coordinates share improve this question If Earth's circumference..

SQL Query for Performing Radius Search based on Latitude Longitude

http://stackoverflow.com/questions/1727137/sql-query-for-performing-radius-search-based-on-latitude-longitude

question IS THERE ANYTHING WRONG With this query In my opinion the WHERE clause is going to be slow because of the maths involved and the use of functions in the WHERE clause will prevent the database using an index to speed the query so in.. index to speed the query so in effect you will examine every restaurant in the database and perform the great circle maths on every row every time you make a query. Personally I would calculate the TopLeft and BottomRight co ordinates of a square..

Using quaternion instead of roll, pitch and yaw to track device motion

http://stackoverflow.com/questions/19239482/using-quaternion-instead-of-roll-pitch-and-yaw-to-track-device-motion

Random Sprite Destinations

http://stackoverflow.com/questions/3817637/random-sprite-destinations

in the x position of that. The arc4random function generates a random number. What you need to do is a little bit of maths to make sure it picks a x position that will still show up on your screen and feed that to your move action. int randomX..

Skybox OpenGL ES iPhone and iPad

http://stackoverflow.com/questions/4110893/skybox-opengl-es-iphone-and-ipad

how touches are delivered in Cocoa Touch. Once you've done everything else this bit should be quite easy. Notably the maths I had to implement was extremely simple. Just the touch tracking really. Assuming you wanted a Google Maps type view meant..

Change the speed of setContentOffset:animated:?

http://stackoverflow.com/questions/4404745/change-the-speed-of-setcontentoffsetanimated

own. For example move 1px every 1 10 second should simulate a very slow scroll animation. Since its a linear animation maths are very easy If you want to get more realistic or fancy and simulate easy in easy off effect then you need some maths to.. maths are very easy If you want to get more realistic or fancy and simulate easy in easy off effect then you need some maths to calculate a bezier path so you can know the exact position at every 1 10 second for example At least the first approach..

OpenGL ES, OpenFrameworks, Cinder and IOS creative development

http://stackoverflow.com/questions/5776839/opengl-es-openframeworks-cinder-and-ios-creative-development

base application like Cinder for example you can create your own contexts and what not and just use the framework's 3d maths libraries or its image library or whatever other part you want. Just include the relevant headers you want. Alternatively..

GLSL: Built-in attributes not accessible for iPhone Apps?

http://stackoverflow.com/questions/8205501/glsl-built-in-attributes-not-accessible-for-iphone-apps

variables as gl_Position gl_PointSize gl_FragCoord gl_FrontFacing gl_PointCoord gl_FragColor gl_FragData n GLKit's maths stuff is really good because it inlines and uses the ARM's NEON SIMD unit. I consider it a sufficient reason to specify..

How can I use a 3-D texture in iOS?

http://stackoverflow.com/questions/9241583/how-can-i-use-a-3-d-texture-in-ios

coordinate to your fragment shader exactly as if there were a way to index 3d textures natively but do a quick bit of maths to collapse it to 2d. So in the 128x128x128 example you'd do something like coded here as I talk untested texPos.x sourceVarying.x..