mirror of
https://github.com/FellippeHeitor/InForm.git
synced 2024-05-12 06:50:12 +00:00
270 lines
9 KiB
QBasic
270 lines
9 KiB
QBasic
': Find if Cursor is Inside or Outside of a Drawn Triangle by Qwerkey 20/06/20
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': After problem set by STxAxTIC
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': This program uses
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': InForm - GUI library for QB64 - v1.1
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': Fellippe Heitor, 2016-2019 - fellippe@qb64.org - @fellippeheitor
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': https://github.com/FellippeHeitor/InForm
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'-----------------------------------------------------------
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': Controls' IDs: ------------------------------------------------------------------
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DIM SHARED InsideOutsideTriangle AS LONG
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DIM SHARED PictureBox1 AS LONG
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DIM SHARED XLB AS LONG
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DIM SHARED YLB AS LONG
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DIM SHARED Pos1LB AS LONG
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DIM SHARED Pos2LB AS LONG
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DIM SHARED Pos3LB AS LONG
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DIM SHARED X1LB AS LONG
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DIM SHARED Y1LB AS LONG
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DIM SHARED X2LB AS LONG
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DIM SHARED Y2LB AS LONG
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DIM SHARED X3LB AS LONG
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DIM SHARED Y3LB AS LONG
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DIM SHARED ExitBT AS LONG
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DIM SHARED RestartBT AS LONG
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DIM SHARED InsideOutsideLB AS LONG
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DIM SHARED ClickFrame AS LONG
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DIM SHARED Click1LB AS LONG
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DIM SHARED Click2LB AS LONG
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DIM SHARED PictureBox2 AS LONG
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DIM SHARED CXLB AS LONG
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DIM SHARED CYLB AS LONG
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CONST SmallErr# = 1E-11 'Need SmallErr to check sum is close to zero (would be exactly zero if no calculation errors)
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DIM SHARED ClickCount%, Vertices%(3, 1), A#, B#, C#, XMouse%, YMouse%
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': External modules: ---------------------------------------------------------------
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'$INCLUDE:'../../InForm/InForm.bi'
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'$INCLUDE:'Inside-Outside Triangle.frm'
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'$INCLUDE:'../../InForm/InForm.ui'
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': Functions: ---------------------------------------------------------------------
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FUNCTION SideLength# (X1#, Y1#, X2#, Y2#)
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'Calculates Side Length from Vertices
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SideLength# = SQR((X1# - X2#) * (X1# - X2#) + (Y1# - Y2#) * (Y1# - Y2#))
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END FUNCTION
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FUNCTION Angle# (L1#, L2#, L3#)
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'Derives vertex angle from 3 sides and rule of cosines
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Angle# = _ACOS(((L2# * L2#) + (L3# * L3#) - (L1# * L1#)) / (2 * L2# * L3#))
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END FUNCTION
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FUNCTION AtCorner%%
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'This function avoids trig divide by zero difficulty at triangle corners
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IF (Vertices%(3, 0) = Vertices%(0, 0) AND Vertices%(3, 1) = Vertices%(0, 1)) OR (Vertices%(3, 0) = Vertices%(1, 0) AND Vertices%(3, 1) = Vertices%(1, 1)) OR (Vertices%(3, 0) = Vertices%(2, 0) AND Vertices%(3, 1) = Vertices%(2, 1)) THEN
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AtCorner%% = TRUE
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ELSE
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AtCorner%% = FALSE
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END IF
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END FUNCTION
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FUNCTION InPicture%%
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'True if cursor is in PictureBox1
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IF XMouse% > 0 AND XMouse% < 650 AND YMouse% > 0 AND YMouse% < 540 THEN
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InPicture%% = TRUE
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ELSE
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InPicture%% = FALSE
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END IF
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END FUNCTION
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': Event procedures: ---------------------------------------------------------------
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SUB __UI_BeforeInit
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A# = 1
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B# = 1
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C# = 1
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FOR N%% = 0 TO 2
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FOR M%% = 0 TO 1
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Vertices%(N%%, M%%) = 1
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NEXT M%%
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NEXT N%%
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END SUB
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SUB __UI_OnLoad
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Control(InsideOutsideLB).Hidden = TRUE
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BeginDraw PictureBox1
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'Drawing code goes here
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COLOR _RGB32(0, 0, 0), _RGB32(255, 255, 255)
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CLS
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EndDraw PictureBox1
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BeginDraw PictureBox2
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_PUTIMAGE , _LOADIMAGE("cursor.png", 32)
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EndDraw PictureBox2
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END SUB
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SUB __UI_BeforeUpdateDisplay
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'This event occurs at approximately 30 frames per second.
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'You can change the update frequency by calling SetFrameRate DesiredRate%
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XMouse% = __UI_MouseLeft - 10
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YMouse% = __UI_MouseTop - 10
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IF InPicture%% THEN
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Vertices%(3, 0) = XMouse%
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Vertices%(3, 1) = YMouse%
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IF NOT AtCorner%% THEN
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'Calculate side lengths of triangle formed with cursor position and triangle vertices
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D# = SideLength#(Vertices%(3, 0), Vertices%(3, 1), Vertices%(1, 0), Vertices%(1, 1))
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E# = SideLength#(Vertices%(3, 0), Vertices%(3, 1), Vertices%(2, 0), Vertices%(2, 1))
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F# = SideLength#(Vertices%(3, 0), Vertices%(3, 1), Vertices%(0, 0), Vertices%(0, 1))
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AlphaDash# = Angle#(A#, E#, F#)
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BetaDash# = Angle#(B#, D#, F#)
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GammaDash# = Angle#(C#, D#, E#)
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IF ABS(AlphaDash# + BetaDash# + GammaDash# - _PI(2)) < SmallErr# THEN
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Caption(InsideOutsideLB) = "INSIDE"
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ELSE
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Caption(InsideOutsideLB) = "OUTSIDE"
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END IF
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END IF
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Caption(CXLB) = LTRIM$(STR$(Vertices%(3, 0)))
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Caption(CYLB) = LTRIM$(STR$(Vertices%(3, 1)))
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ELSE
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Caption(CXLB) = ""
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Caption(CYLB) = ""
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END IF
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END SUB
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SUB __UI_BeforeUnload
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'If you set __UI_UnloadSignal = False here you can
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'cancel the user's request to close.
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END SUB
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SUB __UI_Click (id AS LONG)
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SELECT CASE id
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CASE InsideOutsideTriangle
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CASE ClickFrame
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CASE XLB
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CASE YLB
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CASE Pos1LB
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CASE Pos2LB
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CASE Pos3LB
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CASE X1LB
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CASE Y1LB
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CASE X2LB
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CASE Y2LB
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CASE X3LB
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CASE Y3LB
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CASE InsideOutsideLB
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CASE Click1LB
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CASE Click2LB
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CASE PictureBox2
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CASE CXLB
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CASE CYLB
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CASE PictureBox1
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'Define Positions of Triangle Vertices
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IF InPicture%% THEN
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SELECT CASE ClickCount%
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CASE 0
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Vertices%(0, 0) = XMouse%
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Vertices%(0, 1) = YMouse%
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Caption(X1LB) = LTRIM$(STR$(XMouse%))
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Caption(Y1LB) = LTRIM$(STR$(YMouse%))
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ClickCount% = ClickCount% + 1
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BeginDraw PictureBox1
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LINE (Vertices%(0, 0) - 2, Vertices%(0, 1))-(Vertices%(0, 0) + 2, Vertices%(0, 1)) ', _RGB32(255, 255, 255), BF
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LINE (Vertices%(0, 0), Vertices%(0, 1) - 2)-(Vertices%(0, 0), Vertices%(0, 1) + 2)
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EndDraw PictureBox1
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Caption(Click2LB) = "Vertex 2"
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CASE 1
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Vertices%(1, 0) = XMouse%
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Vertices%(1, 1) = YMouse%
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Caption(X2LB) = LTRIM$(STR$(XMouse%))
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Caption(Y2LB) = LTRIM$(STR$(YMouse%))
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ClickCount% = ClickCount% + 1
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BeginDraw PictureBox1
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LINE (Vertices%(1, 0) - 2, Vertices%(1, 1))-(Vertices%(1, 0) + 2, Vertices%(1, 1))
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LINE (Vertices%(1, 0), Vertices%(1, 1) - 2)-(Vertices%(1, 0), Vertices%(1, 1) + 2)
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LINE (Vertices%(0, 0), Vertices%(0, 1))-(Vertices%(1, 0), Vertices%(1, 1))
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EndDraw PictureBox1
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Caption(Click2LB) = "Vertex 3"
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CASE 2
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Vertices%(2, 0) = XMouse%
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Vertices%(2, 1) = YMouse%
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Caption(X3LB) = LTRIM$(STR$(XMouse%))
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Caption(Y3LB) = LTRIM$(STR$(YMouse%))
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ClickCount% = ClickCount% + 1
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BeginDraw PictureBox1
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LINE (Vertices%(2, 0) - 2, Vertices%(2, 1))-(Vertices%(2, 0) + 2, Vertices%(2, 1))
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LINE (Vertices%(2, 0), Vertices%(2, 1) - 2)-(Vertices%(2, 0), Vertices%(2, 1) + 2)
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LINE (Vertices%(1, 0), Vertices%(1, 1))-(Vertices%(2, 0), Vertices%(2, 1))
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LINE (Vertices%(2, 0), Vertices%(2, 1))-(Vertices%(0, 0), Vertices%(0, 1))
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EndDraw PictureBox1
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Caption(Click1LB) = "Move Cursor"
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Caption(Click2LB) = "Around"
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Control(InsideOutsideLB).Hidden = FALSE
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'Triangle Side Lengths
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A# = SideLength#(Vertices%(0, 0), Vertices%(0, 1), Vertices%(2, 0), Vertices%(2, 1))
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B# = SideLength#(Vertices%(1, 0), Vertices%(1, 1), Vertices%(0, 0), Vertices%(0, 1))
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C# = SideLength#(Vertices%(2, 0), Vertices%(2, 1), Vertices%(1, 0), Vertices%(1, 1))
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END SELECT
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END IF
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CASE ExitBT
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SYSTEM
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CASE RestartBT
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ClickCount% = 0
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BeginDraw PictureBox1
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COLOR _RGB32(0, 0, 0), _RGB32(255, 255, 255)
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CLS
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EndDraw PictureBox1
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Caption(X1LB) = ""
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Caption(Y1LB) = ""
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Caption(X2LB) = ""
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Caption(Y2LB) = ""
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Caption(X3LB) = ""
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Caption(Y3LB) = ""
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Control(InsideOutsideLB).Hidden = TRUE
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Caption(Click1LB) = "Click To Set"
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Caption(Click2LB) = "Vertex 1"
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END SELECT
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END SUB
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SUB __UI_MouseEnter (id AS LONG)
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END SUB
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SUB __UI_MouseLeave (id AS LONG)
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END SUB
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SUB __UI_FocusIn (id AS LONG)
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END SUB
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SUB __UI_FocusOut (id AS LONG)
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'This event occurs right before a control loses focus.
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'To prevent a control from losing focus, set __UI_KeepFocus = True below.
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END SUB
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SUB __UI_MouseDown (id AS LONG)
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END SUB
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SUB __UI_MouseUp (id AS LONG)
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END SUB
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SUB __UI_KeyPress (id AS LONG)
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'When this event is fired, __UI_KeyHit will contain the code of the key hit.
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'You can change it and even cancel it by making it = 0
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END SUB
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SUB __UI_TextChanged (id AS LONG)
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END SUB
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SUB __UI_ValueChanged (id AS LONG)
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END SUB
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SUB __UI_FormResized
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END SUB
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