How to resolve the algorithm Polyspiral step by step in the AutoHotkey programming language

Published on 12 May 2024 09:40 PM
#Autohotkey

How to resolve the algorithm Polyspiral step by step in the AutoHotkey programming language

Table of Contents

Problem Statement

A Polyspiral is a spiral made of multiple line segments, whereby each segment is larger (or smaller) than the previous one by a given amount. Each segment also changes direction at a given angle.

Animate a series of polyspirals, by drawing a complete spiral then incrementing the angle, and (after clearing the background) drawing the next, and so on. Every spiral will be a frame of the animation. The animation may stop as it goes full circle or continue indefinitely. The given input values may be varied. If animation is not practical in your programming environment, you may show a single frame instead.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Polyspiral step by step in the AutoHotkey programming language

Source code in the autohotkey programming language

If !pToken := Gdip_Startup()
{
    MsgBox, 48, gdiplus error!, Gdiplus failed to start. Please ensure you have gdiplus on your system
    ExitApp
}
 
OnExit, Exit
gdip1()
 
incr := 0
π := 3.141592653589793
loop
{
    incr := Mod(incr + 0.05, 360)
    x1 := Width/2
    y1 := Height/2
    length := 5
    angle := incr
    Gdip_FillRoundedRectangle(G, pBrush, 0, 0, Width, Height, 0)
    loop 150
    {
        x2 := x1 + length * Cos(angle * π/180)
        y2 := y1 + length * Sin(angle * π/180)
        Gdip_DrawLine(G, pPen, x1, y1, x2, y2)
        x1 := x2
        y1 := y2
        length := length + 3
        angle := Mod(angle + incr, 360)
    }
    UpdateLayeredWindow(hwnd1, hdc, -1, -1, Width, Height)
    Sleep 25
}
return
;----------------------------------------------------------------
Esc:: Pause, toggle
^Esc::ExitApp
;----------------------------------------------------------------
gdip1(){
    global
    Width := A_ScreenWidth+1, Height := A_ScreenHeight+1
    Gui, 1: -Caption +E0x80000 +LastFound +OwnDialogs +Owner +AlwaysOnTop
    Gui, 1: Show, NA
    hwnd1 := WinExist()
    hbm := CreateDIBSection(Width, Height)
    hdc := CreateCompatibleDC()
    obm := SelectObject(hdc, hbm)
    G := Gdip_GraphicsFromHDC(hdc)
    Gdip_SetSmoothingMode(G, 4)
    pBrush := Gdip_BrushCreateSolid("0xFF000000")
    pPen := Gdip_CreatePen("0xFF00FF00", 1)
}
;----------------------------------------------------------------
gdip2(){
    global
    Gdip_DeletePen(pPen)
    Gdip_DeleteBrush(pBrush)
    SelectObject(hdc, obm)
    DeleteObject(hbm)
    DeleteDC(hdc)
    Gdip_DeleteGraphics(G)
}
;----------------------------------------------------------------
Exit:
gdip2()
Gdip_Shutdown(pToken)
ExitApp
Return
;----------------------------------------------------------------

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