[RESOLVED] 2D translate + scale + rotate
My ZoomPictureBox (see sig) provides image dragging and zooming, with zooming around an arbitrary point such as the mouse position. I'm now trying to do something similar in WPF, but with image...
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[RESOLVED] calculating vertices of a square
assuming i have a square: Attachment 91803 + i know the coordinates of point A + point C, or the coordinates of point B + point D... how can i find the coordinates of the other 2 points? Attached...
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[RESOLVED] calculating columnIndex, rowIndex from point
i have a picturebox that has a hexagon grid drawn on it: Attachment 91897 at runtime, as i move my mouse over the picturebox, i want to calculate the columnIndex + rowIndex that contains the...
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[RESOLVED] calculate largest rectangle that fits in ellipse
how can i calculate the largest rectangle that fits in an ellipse + the 4 points that describe that rectangle? see image... the green rectangle is what i'm looking for: Attachment 91973 Attached Images
View ArticleCalculate Inclination from Pitch and Roll
Hello! My english is not so good but I hope you can understand me. My problem is that I have values for pitch and roll angle (range: +90° ... -90°). pitch is inclination from vertical at x-direction,...
View ArticleCalculating the start index of a string
I'm creating a hangman game and I have everything working, but this one issue. What I'm doing is choosing a random word here: vb.net Code: 'Choose a randomword Dim r As New Random Dim int...
View Articlex ^ y Mod z
Hi, I was wondering if there's any general algorithm where you can calculate x^y Mod z assuming they're all positive integers without having to calculate x^y (since extremely large results don't keep...
View ArticleCombinations with different probability
Lets say I have 5 independent events (A-E): Pr(A) = 0,5 Pr(B) = 0,4 Pr(C) = 0,3 Pr(D) = 0,2 Pr(E) = 0,1 One "attempt" per event. I want to calculate the probability of three succesful events. I do it...
View ArticleBattery charge cycle math
According to Apple, an iPhone battery can go through 400 charge cycles before the capacity diminishes to 80%, assuming nothing happens that is known to degrade the battery's life (i.e, the temperature...
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Magic square, 5x5, even numbers from 2 to 50 totalling 130
My son got an assignment and I am trying to help him solve it but I am also unable to find the solution, can anyone here help me out? Google was not helpful also. He has got to solve a magic square and...
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[RESOLVED] Magic square, 5x5, even numbers from 2 to 50 totalling 130
My son got an assignment and I am trying to help him solve it but I am also unable to find the solution, can anyone here help me out? Google was not helpful also. He has got to solve a magic square and...
View ArticlePuzzle
1. Show that 30^239 + 239^30 is not prime. 2. Investigate when (p-1)^q + q^(p-1) is divisible by p, for primes p and q. Fermat's Little Theorem may be helpful.
View ArticleHow to Find R in formula??
hi all, am using DAO in VB6 and MS-Access as back hand. now, i have a formula, u can find out EMI for Loan with that formula. formula is as below. EMI = P * R * (1 + R)^N / ((1 + R)^N - 1) ----> Plz...
View Article[RESOLVED] How to Find R in formula??
hi all, am using DAO in VB6 and MS-Access as back hand. now, i have a formula, u can find out EMI for Loan with that formula. formula is as below. EMI = P * R * (1 + R)^N / ((1 + R)^N - 1) ----> Plz...
View ArticleExponential Moving Average
Does anyone having a function to calculate EMA that they would be willing to share? Would like to input an array of values & a period & get back the EMA value. Thanks if you can help...
View ArticleHolt-Winters Triple Exponential smoothing
I am trying to code Holt-Winters Triple Exponential smoothing in VB.NET. http://www.itl.nist.gov/div898/handb...on4/pmc435.htm The part I am struggling with is "alpha, beta and gamma are constants that...
View ArticleHow things add up
I got this wrong when it was said as a sentence: What is forty plus forty times zero plus one? I said one. The person that asked me said no it is forty one. I plugged that into a program as: Dim X as...
View ArticleTechniques on oral/mental math
My 9 year old son will compete on a mental/oral math competition next week, anyone here who can provide tips or provide a link for some tip and tricks? TIA
View Articleintersection point slightly off
the code i've posted is supposed to find the intersection point of 2 lines, but it's slightly wrong. i make the point of intersection 122,42, but i think getnode (i found this function on msdn) finds...
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[RESOLVED] calculate points on line
how can i calculate points 5 pixels from both ends on the 2 black lines in the attached image? Attachment 98299 the lines are parallel + spaced approximately 24 pixels apart. this is the code i used to...
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