I have balls bouncing around and each time they collide their speed vector is reduced by the Coefficient of Restitution. Right now my balls CoR for my balls is .80 . So after many bounces my balls have "stopped" rolling because their speed has becoming some ridiculously small number. In what stage is it appropriate to check if a spee...
Are there any lower bounds for floating point types in C? Like there are lower bounds for integral types (int being at least 16 bits)? ...
http://msdn.microsoft.com/en-us/library/system.double.epsilon.aspx If you create a custom algorithm that determines whether two floating-point numbers can be considered equal, you must use a value that is greater than the Epsilon constant to establish the acceptable absolute margin of difference for the two values to be ...
To make the problem short let's say I want to compute expression: a / (b - c) on float's. To make sure the result is meaningful, I can check if 'b' and 'c' are inequal: float EPS = std::numeric_limits<float>::epsilon(); if ((b - c) > EPS || (c - b) > EPS) { return a / (b - c); } but my tests show it is not enough to guarantee eit...
I have a method that deals with some geographic coordinates in .NET, and I have a struct that stores a coordinate pair such that if 256 is passed in for one of the coordinates, it becomes 0. However, in one particular instance a value of approximately 255.99999998 is calculated, and thus stored in the struct. When it's printed in ToStrin...
This is a follow-up to Testing for floating-point value equality: Is there a standard name for the “precision” constant?. There is a very similar question Double.Epsilon for equality, greater than, less than, less than or equal to, greater than or equal to. It is well known that an equality test for two floating-point values x and y s...
The text book teaches us to write regular expressions using the epsilon (ε) symbol, but how can I translate that symbol directly to code without having to completely rework my regular expression? For instance, how would I write this regex which would catch all lowercase strings that either begin or end in a (or both). Not 100% sure thi...
I am doing some floating point arithmetic and having precision problems. The resulting value is different on two machines for the same input. I read the post @ http://stackoverflow.com/questions/3031143/why-cant-i-multiply-a-float and also read other material on the web & understood that it is got to do with binary representation of floa...