Get Angle Of Two Lines?

Apr 21, 2010

Once again my math fails me, as I can't remember how to do this.

If I have two Lines, line1 and line2, and they both have the same X1 and Y1 properties, but different X2 and Y2 properties, how can I get the angle that is created between these lines.[code]...

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Restricting An Angle Between Two Lines?

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i am having a problem with either my algorithm for restricting an angle between lines. I have a diagram of my problem at the following linK: [URL] In the above diagram, i know the positions of the Points marked on the diagram. The Black lines represent where the lines are currently, i want to move the lines so that they are at right angles to one-an-other (i.e: they are perpendicular) if they are moved to not be so. This is represented by the gray lines.

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I am writing a program that needs the user to input three numbers (i.e. sides of a triangle) and based upon those numbers tell the user if the numbers they enter represent a right triangle or not. how to go about this mathematically and care to offer any suggestions on the syntax of the calculations.

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if i use

Dim Gr As Graphics = SomePanel.CreateGraphics()
Gr.Drawline(StartingPoint, EndingPoint)

I want to be able to have a line drawn from point a to b, but be able to rate it 90 degress based on user input so if the user inputs 70 I want it to rotate 30 degree's to simulate a 70 deg relationship to a horizontal line that it touches if that makes any sense. a is starting point b is the user inputs 70 and it draws it at 70 in relationship to the horizontal lineheres the image that i forgot to post above Attached image(s)

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Nov 10, 2011

I have a space ship that I want to turn to a destination angle. Currently it works like 90% of the time, but sometimes, it 'jumps' to the destination angle rather than moving smoothly. Here is my code:

a = System.Math.Sin(.destStoppingAngle + System.Math.PI)
b = System.Math.Cos(.destStoppingAngle + System.Math.PI)
c = System.Math.Sin(.msngFacing)
d = System.Math.Cos(.msngFacing)

[Code]...

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[2005 ] DrawString On An Angle?

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Is there a transformation function that can be applied to the Graphics.DrawString to output text on an angle?

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Apr 18, 2011

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a=pt(1).x
b=pt(1).y
c=pt(2).x
d=pt(2).y

z=math.atan2((c-a),(d-b))*(180/math.pi)

The issue is that the line im drawing is almost parallel to the x axis but its returning a value of roughly 90 degrees .It seems like it is giving me the angle in relation to the y axis, but not being super good at the math myself im not exactly sure what to change here.

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Oct 28, 2011

I have a form i have made to calculate angles, well, I have now added a check box to reverse the angle and have got it to reverse with no problems. The problem I have is, when I uncheck the checkbox, The line doesnt revert back to normal posistion.Here is the code if someone could point me in the right direction cause I am lost now.

Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data

[code].....

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What would I do to calculate this angle into a visual graphic?

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Is there a transformation function that can be applied to the Graphics.DrawString to output text on an angle?

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VS 2010 Draw A Line And Calculate The Angle?

Oct 20, 2011

I Have created a program (see below) that enables you to use you cam. You then draw a line and calculate the angle. The purpose is that I do alot of work with remote control cars and need to acuratley set toe and camber angles, it takes to long with the "old" method So I am creating this little program. ok, so, lets see what I want to do. Well, the first thing I would like to do is draw a line from top to bottom of my picture box dead center of left to right, this is dead center of the cam so the bottom of your item should be posistioned to meet the bottom of the centre line. I then draw a line from bottom to top of the objects angle. I then use the dead center line and the line I drew to calculate the angle.

[Code]...

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The program will open a text file and the program will do its stuff.

The text file will be like: I have 2 co-ordinates (X, Y) just contain numbers.[code]...

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example:

1-pauljaones
2-tommyperrry
3-marktoms
4-Jonessmith
5-paulwhite

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I have written a simple script to get a bunch of lines from a text file (they will be filenames eventually) which are split by new lines and puts each one into an array..

Dim ary() As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If My.Computer.FileSystem.FileExists("C:MenuFiles.txt") Then

[code]....

The only thing I can do for now is either use the substring function to remove the first character from all array values after 0 but I don't like that because it's messy and what if the split "works" as I want it to one one of the lines and knocks of the first character when I don't want it to.

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below are a few lines from my text file(10929 lines)I need to read each line and insert into MS Access. each line is a column in my table and the record changes on every 8th line or to be more specific(on every 8th line you will see a number [1,2,3,4,5,6,7,8,9.....] this is where another record starts,

[Code]...

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[Code]...

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I am trying to make a script to spit command lines to a bat file to compress a bunch of files singly and then delete the original ones. I am sure that is easy to most of you, but I living a ____ trying to do this. A have a file list like this one belo, which was created with a command -- Dir /b /s /a-D N: > filelist.txt

[Code]...

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Move From Point A To Point B Along An Angle?

Mar 14, 2009

I need to move an ellipse from a known point on the screen to another known point on the screen.

I've tried using For.....Loops with less than desired results.

I can't remember everything I've tried, a lot of trial and error has been layed to waste. Lol

I've ended up with this code after putting together what I've tried, what I've learned elsewhere, and a couple of posts I've read on here.

All I want to do is move the ellipse from one point to the other along a straight line that forms the angle between the two points (X1,Y1) and (X2,Y2), make it grow from 2 pixels at it's start, to about 80 pixels by the time it reaches half way, then shrink from 80 pixels back down to 2 pixels by the time it reaches the point (X2,Y2).

Easier said than done.

Here's what I have at the present.....

Dim W As Integer
Dim H As Integer
Dim Num As Integer

[Code].....

....This seems like such a simple task, yet it's been a week since I came up with the idea, and I've had little success.

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