Multi-Origin vectors/triangles

[maestro]

Hi, I'm trying to make a graph calculator sort of thing that can take 2 points on a grid and find out what direction origin 2 is from origin 1.

For example, you have a point at 50,50 and another point at -10,70 (this should be somewhere between 270 and 360 for this example)

is there any way to have it fill into the graph, origin 2 is "X"degrees from origin 1.

No I know you can take origin2 X and subtract it from origin1 X, and do the same for the Y's, but then you are always getting a -90 to 90 value,

what I am looking for is something that can say for example if you wanted 210deg it would give you 210 rather then 30deg.

Thanks,

Ilmaestro.

[UEZ]

Maybe this example will help you...

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;Coded by UEZ Build 2010-06-21
#include <GDIPlus.au3>
Opt("GUIOnEventMode", 1)
Opt("MouseCoordMode", 2)
$width = 600
$height = $width
$w05 = $width / 2
$h05 = $height / 2
$180_div_pi = 180 / ACos(-1)
Local $mx = $w05, $my = $h05
$r = 100
$r2 = $r / 2
$angle = 0
$hGUI = GUICreate("GDI+ Trigonometrie by UEZ 2010", $width, $height)
GUISetState()

_GDIPlus_Startup()
$hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI)
$hBitmap = _GDIPlus_BitmapCreateFromGraphics($width, $height, $hGraphics)
$hBuffer = _GDIPlus_ImageGetGraphicsContext($hBitmap)
_GDIPlus_GraphicsSetSmoothingMode($hBuffer, 2)
_GDIPlus_GraphicsClear($hBuffer, 0xFFF0F0F0)
$hPen1 = _GDIPlus_PenCreate(0xFF0000A0, 2)
$hPen2 = _GDIPlus_PenCreate(0xA0000000, 1)
$hBrush1 = _GDIPlus_BrushCreateSolid(0x8000A000)
$hBrush2 = _GDIPlus_BrushCreateSolid(0x80A00000)

GUISetOnEvent(-3, "_Exit")

While Sleep(30)
    _GDIPlus_GraphicsClear($hBuffer, 0xA0F0F0F0)
    _GDIPlus_GraphicsDrawLine($hBuffer, 0, $h05, $width, $h05, $hPen2)
    _GDIPlus_GraphicsDrawLine($hBuffer, $w05, 0, $w05, $height, $hPen2)

    _GDIPlus_GraphicsDrawString($hBuffer, "X", $width - 15, $h05)
    _GDIPlus_GraphicsDrawString($hBuffer, "Y", $w05 - 15, 0)
    _GDIPlus_GraphicsDrawString($hBuffer, "-X", 2, $h05)
    _GDIPlus_GraphicsDrawString($hBuffer, "-Y", $w05 - 20, $height - 17)

    $mpos = MouseGetPos()
    $mwx = $mpos[0] - $w05
    $mwy = $h05 - $mpos[1]
    $pd = Pixel_Distance($w05, $h05, $mpos[0], $mpos[1])
    If $pd > 50 And $pd < $w05 - 10 Then
    $angle = -ATan($mwy / $mwx) * $180_div_pi
    If $mwx < 0 Then
    $angle = -180 + $angle
    ElseIf $mwx >= 0 And $mwy < 0 Then
    $angle = -360 + $angle
    EndIf
    _GDIPlus_GraphicsDrawString($hBuffer, StringFormat("%.2f", Abs($angle)) & "°", $mpos[0], $h05)
    _GDIPlus_GraphicsFillPie($hBuffer, $w05 - $r2, $h05 - $r2, $r, $r, 0, $angle, $hBrush1)
;~  _GDIPlus_GraphicsFillPie($hBuffer, $w05 - $r2, $h05 - $r2, $r, $r, -180, $angle, $hBrush2)
    _GDIPlus_GraphicsDrawLine($hBuffer, $width - $mpos[0], $height - $mpos[1], $mpos[0], $mpos[1], $hPen1)
    $mx = $mpos[0]
    $my = $mpos[1]
    Else
    _GDIPlus_GraphicsDrawString($hBuffer, StringFormat("%.2f", Abs($angle)) & "°", $mx, $h05)
    _GDIPlus_GraphicsFillPie($hBuffer, $w05 - $r2, $h05 - $r2, $r, $r, 0, $angle, $hBrush1)
;~  _GDIPlus_GraphicsFillPie($hBuffer, $w05 - $r2, $h05 - $r2, $r, $r, -180, $angle, $hBrush2)
    _GDIPlus_GraphicsDrawLine($hBuffer, $width - $mx, $height - $my, $mx, $my, $hPen1)
    EndIf
    _GDIPlus_GraphicsDrawImage($hGraphics, $hBitmap, 0, 0)
WEnd

Func Pixel_Distance($x1, $y1, $x2, $y2) ;Pythagoras theorem
    Local $a, $b, $c
    If $x2 = $x1 And $y2 = $y1 Then
    Return 0
    Else
    $a = $y2 - $y1
    $b = $x2 - $x1
    $c = Sqrt($a * $a + $b * $b)
    Return $c
    EndIf
EndFunc ;==>Pixel_Distance

Func _Exit()
    _GDIPlus_BrushDispose($hBrush1)
    _GDIPlus_BrushDispose($hBrush2)
    _GDIPlus_PenDispose($hPen1)
    _GDIPlus_PenDispose($hPen2)
    _GDIPlus_BitmapDispose($hBitmap)
    _GDIPlus_GraphicsDispose($hBuffer)
    _GDIPlus_Shutdown()
    GUIDelete($hGUI)
    Exit
EndFunc

Br,

UEZ

Edited August 29, 2010 by UEZ

[maestro]

Hey, that's a really cool user interface, but can you simplify it, taking out the section i would need, I don't need the GUI or anything just the math section of it and explain it a little better.

Thanks for the reply.

Edited August 31, 2010 by maestro