Drawing a predicted trejectory on screen

[Negative1]

Hi all,

I have the code and formulas to correctly predict bullet drop and trejectory of a projectile however how I would like to simulate it graphically. What would be the best / easiest way to draw a trejectory arc overtop of another window?

Thanks,

-1

[UEZ]

I made this awhile ago:

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;Coded by UEZ Build 2010-06-25
#AutoIt3Wrapper_Run_Obfuscator=y
#Obfuscator_Parameters=/sf /sv /om /cs=0 /cn=0
#AutoIt3Wrapper_UseUpx=n
#AutoIt3Wrapper_Run_After=del /f /q "GDI+ Ball Trajectory_Obfuscated.au3"
#AutoIt3Wrapper_Run_After=upx.exe --ultra-brute "%out%"

#include <GDIPlus.au3>
#Include <Misc.au3>
Opt("MustDeclareVars", 1)
Opt("GUIOnEventMode", 1)
Opt("MouseCoordMode", 2)
Local Const $width = 1024
Local Const $height = 600
Local $hGUI = GUICreate("GDI+ Ball Trajectory by UEZ 2010", $width, $height)
GUISetState()

_GDIPlus_Startup()
Local $hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI)
Local $hBitmap = _GDIPlus_BitmapCreateFromGraphics($width, $height, $hGraphics)
Local $hBuffer = _GDIPlus_ImageGetGraphicsContext($hBitmap)
_GDIPlus_GraphicsSetSmoothingMode($hBuffer, 2)
_GDIPlus_GraphicsClear($hBuffer, 0xFFF0F0F0)

Local $hPen = _GDIPlus_PenCreate(0xFF0000A0, 2)
Local $hBrush = _GDIPlus_BrushCreateSolid(0xA000A000)

GUISetOnEvent(-3, "_Exit")
Local $mpos, $d, $dx,$dy, $lx, $ly, $cl
Local Const $deg2rad = 180 / ACos(-1)
Local Const $rad2deg = ACos(-1) / 180
Local $lmb = 0
Local $angle = 0
Local $ball_x = 0
Local $ball_y = 0
Local Const $ball_r = 16
Local Const $ball_r2 = $ball_r / 2
Local $fire = 0
Local $power = 2
Local $power_scale = 0
Local Const $max_power = 30
Local Const $gravity = 1
Local Const $max_dist = 350
Local Const $min_dist = 100

While Sleep(30)
    _GDIPlus_GraphicsClear($hBuffer, 0xE0F0F0F0)
    $mpos = MouseGetPos()
    If _IsPressed("01") And $fire = 0 And WinActive($hGUI) Then
        $lmb = 1
        If $power < $max_power Then $power += 1
        _GDIPlus_PenSetWidth($hPen, $power)
        $d = Pixel_Distance(0, $height, $mpos[0], $mpos[1])
        If $d > $max_dist Then
            $angle = ATan(($height - $mpos[1]) / $mpos[0]) * $deg2rad
            $lx = Cos($angle * $rad2deg) * $max_dist
            $ly = Sin($angle * $rad2deg) * $max_dist
            _GDIPlus_GraphicsDrawLine($hBuffer, 0, $height, $lx, $height - $ly, $hPen)
            $ball_x = $lx
            $ball_y = $height - $ly
            $power_scale = 0.005 * $power
            $dx = -$lx * $power_scale
            $dy = $ly * $power_scale
        ElseIf $d < $min_dist Then
            $angle = ATan(($height - $mpos[1]) / $mpos[0]) * $deg2rad
            $lx = Cos($angle * $rad2deg) * $min_dist
            $ly = Sin($angle * $rad2deg) * $min_dist
            _GDIPlus_GraphicsDrawLine($hBuffer, 0, $height, $lx, $height - $ly, $hPen)
            $ball_x = $lx
            $ball_y = $height - $ly
            $power_scale = 0.005 * $power
            $dx = -$lx * $power_scale
            $dy = $ly * $power_scale
        Else
            _GDIPlus_GraphicsDrawLine($hBuffer, 0, $height, $mpos[0], $mpos[1], $hPen)
            $ball_x = $mpos[0]
            $ball_y = $mpos[1]
            $dx = -$mpos[0] * 0.005 * $power
            $dy = ($height - $mpos[1]) * 0.005 * $power
        EndIf
    Else
        If $lmb = 1 Then
            $fire = 1
            $lmb = 0
        EndIf
        $power = 2
        _GDIPlus_PenSetWidth($hPen, $power)
        $d = Pixel_Distance(0, $height, $mpos[0], $mpos[1])
        $angle = ATan(($height - $mpos[1]) / $mpos[0]) * $deg2rad
        If $d > $max_dist Then
            $lx = Cos($angle * $rad2deg) * $max_dist
            $ly = Sin($angle * $rad2deg) * $max_dist
            _GDIPlus_GraphicsDrawLine($hBuffer, 0, $height, $lx, $height - $ly, $hPen)
            $cl = Pixel_Distance(0, $height, $lx, $height - $ly)
        ElseIf $d < $min_dist Then
            $lx = Cos($angle * $rad2deg) * $min_dist
            $ly = Sin($angle * $rad2deg) * $min_dist
            _GDIPlus_GraphicsDrawLine($hBuffer, 0, $height, $lx, $height - $ly, $hPen)
            $cl = Pixel_Distance(0, $height, $lx, $height - $ly)
        Else
            _GDIPlus_GraphicsDrawLine($hBuffer, 0, $height, $mpos[0], $mpos[1], $hPen)
            $cl = Pixel_Distance(0, $height, $mpos[0], $mpos[1])
        EndIf
    EndIf
    ToolTip("Cannon Angle: " & Int($angle) & "°, Cannon Power: " & $power & ", Cannon Length: " & Int($cl) & ", Ball x: " & Int($ball_x) & ", Ball y: " & Int($ball_y))
    If $fire Then
        _GDIPlus_GraphicsFillEllipse($hBuffer, $ball_x - $ball_r2, $ball_y - $ball_r2, $ball_r, $ball_r, $hBrush)
        $ball_x -= $dx
        $ball_y -= $dy
        $dy -= $gravity
        If $ball_x > $width Or $ball_y > $height Or $ball_x < -$ball_r Then
            $fire = 0
            $ball_x = 0
            $ball_y = 0
        EndIf
    EndIf
    _GDIPlus_GraphicsDrawString($hBuffer, "Coded by UEZ 2010", $width - 105, $height - 15, "Arial", 8)
    _GDIPlus_GraphicsDrawImage($hGraphics, $hBitmap, 0, 0)
WEnd

Func _Exit()
    _GDIPlus_BrushDispose($hBrush)
    _GDIPlus_PenDispose($hPen)
    _GDIPlus_BitmapDispose($hBitmap)
    _GDIPlus_GraphicsDispose($hBuffer)
    _GDIPlus_Shutdown()
    GUIDelete($hGUI)
    Exit
EndFunc


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

Might be helpful for you.

Br,

UEZ

[smartee]

Hi all,

I have the code and formulas to correctly predict bullet drop and trejectory of a projectile however how I would like to simulate it graphically. What would be the best / easiest way to draw a trejectory arc overtop of another window?

Thanks,

-1

Have you tried using the GDIPlus functions?

EDIT: *sigh* beaten to it :|

Edited January 25, 2011 by smartee

[Negative1]

Thanks for the script.

I'm more looking for help on how to draw on an already open window eg. not my own GUI...

Thanks

-1