math

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When drawing a square inside a circle, can you assume the width of the square is 4/3 of the circle radius? [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow.[详细]

2023-04-08 04:28 分类：问答
3d orthogonal projection on a plane

I have a point in 3d P(x,y,z) and a plane of view Ax+By+Cz+d=0 . A point in plane is E.Now i want to project that 3d point to that plane and get 2d coordinates of the projected point relative to the p[详细]

2023-04-08 03:56 分类：问答
Subtraction of 2 negative integer (two's complement) never overflowing

I 开发者_JAVA技巧came across this in a computer architecture textbook: Subtracting a strictly negative integer from another strictly negative integer (in two\'s complement) will never overflow.[详细]

2023-04-08 02:09 分类：问答
Rotate a vector about another vector

I am writing a 3d vector class for OpenGL.How do I rotate a vector v1 about another v开发者_Python百科ector v2 by an angle A?You may find quaternions to be a more elegant and efficient solution.[详细]

2023-04-08 01:11 分类：问答
Why does -2 % 360 give -2 instead of 358 in c#

Microsoft Mathematics and Google\'s calculator give me 358 for -2 % 360, but C# andwin开发者_StackOverflow中文版dows calculator are outputting -2 ... which is the right answer ?The C# compiler is doin[详细]

2023-04-08 00:24 分类：问答
Detecting if you are one kilometre from point of interest

I have an interesting question. I have a latitude value of 51.445376 and a longitude value of -0.190624 (as an example, say this was recieved by an androids location listener). This particular locatio[详细]

2023-04-07 23:12 分类：问答
Calculating Reciprocals: n**(-1) or (1/n)?

In random.py\'s source code, there is the following constant definition: BPF = 53# Number of bits in a float[详细]

2023-04-07 21:29 分类：问答
Detecting a small curve

Suppose you have a contour made of lines, arcs, etc. It can be of any size from 1e-6 to 1e+6. How can I detect tiny useless curves inside it? At the moment we are taking the diagonal of the contour bo[详细]

2023-04-07 19:55 分类：问答
Calculate entropy of probability distribution of two data sets- text analysis & sentiment in C#

I\'m using a 1.6M tweet corpus to train a naive bayes sentiment engine. I have two Dictionaries of n-grams (Dictionary<string,int> where the string is my n-gram and the int is the # of occurre[详细]

2023-04-07 14:38 分类：问答
SQL or PHP mistake? Distance calculation

I have a problem with my file. I\'m making Travian Clone script and we went really far. Now we decided to add artefacts into game.[详细]

2023-04-07 14:06 分类：问答