When you are taking photos in low-light situations, you will fi nd that the camera’s autofocus doesn’t always work. But before you can properly and consistently fi nd focus in these instances, you need to understand how your camera’s...
Many of today’s Canon lenses come with a feature called image stabilization (IS). If you happen to have one of these lenses, you have a little extra help keeping your lens stable while doing any type of handheld photography....
If you’re fi nding that ISO 6400 just isn’t high enough for you, you have the option of increasing it to the next level, ISO 12800. This setting won’t appear as a number, but as an “H” on your...
Capturing moments in low-light situations is easy with digital cameras—just raise the ISO. Adjusting the ISO on the fl y is easy; simply press the ISO button on the top of the camera and change the ISO number by...
Mapping a tapped location to 3D
To pick an object in a 3D game is relevant in terms of real-time strategy. For example, in StarCraft2, you can choose a construction from a 2D panel, then a semi-transparent 3D model will...
Detecting the intersection of line segments
Basically, line segments' intersection is a mathematical concept. To detect the intersection of two line segments, find their intersection points. For 2D games, it is very helpful when an explosion animation appears at a...
