<% Option Explicit Rem ���ò��� Dim nImgWidth,nImgHeight Const nSaturation = 100 ' ɫ�ʱ��Ͷ� Const nBlankNoisyDotOdds = 0.0 ' �հ״������ Const nColorNoisyDotOdds = 0.0 ' ��ɫ������� Const nNoisyLineCount =3 ' ���������� Const nCharMin = 5 ' ��������С�ַ����� Const nCharMax = 5 ' ����������ַ����� Const nSpaceX = 2 ' �������ߵĿհ��� Const nSpaceY = 2 ' �������ߵĿհ��� IF Isnumeric(Request("t0")) And Request("t0")<>"" Then nImgWidth =Request("t0") Else nImgWidth=64 ' ���������� IF Isnumeric(Request("t1")) And Request("t1")<>"" Then nImgHeight=Request("t1") Else nImgHeight=18 ' �������߶� Const nCharWidthRandom = 16 ' �ַ���������� Const nCharHeightRandom = 16 ' �ַ��߶������ Const nPositionXRandom =0 ' ����λ������� Const nPositionYRandom =0 ' ����λ������� Const nAngleRandom = 0 ' �ʻ��Ƕ������ Const nLengthRandom = 0 ' �ʻ����������(�ٷֱ�) Const nColorHue = -2 ' ��ʾ��֤���ɫ��(-1��ʾ���ɫ��, -2��ʾ�Ҷ�ɫ��) Const cCharSet = "0123456789" ' ������֤����ַ��� Rem --------------------- Randomize Dim Buf(), DigtalStr Dim Lines(), LineCount Dim CursorX, CursorY, DirX, DirY, nCharCount, nPixelWidth, nPixelHeight, PicWidth, PicHeight nCharCount = nCharMin + CInt(Rnd * (nCharMax - nCharMin)) PicWidth = nImgWidth + 2 * nSpaceX PicHeight = nImgHeight + 2 * nSpaceY Call CreatValidCode("zengscode") Sub CDGen_Reset() ' ��λʸ���ʺͻ������� LineCount = 0 CursorX = 0 CursorY = 0 ' ��ʼ�Ĺ�ʷ����Ǵ�ֱ���� DirX = 0 DirY = 1 End Sub Sub CDGen_Clear() ' ���λͼ���� Dim i, j ReDim Buf(PicHeight - 1, PicWidth - 1) For j = 0 To PicHeight - 1 For i = 0 To PicWidth - 1 Buf(j, i) = 0 Next Next End Sub Sub CDGen_PSet(X, Y) ' ��λͼ�����ϻ��� If X >= 0 And X < PicWidth And Y >= 0 And Y < PicHeight Then Buf(Y, X) = 1 End Sub Sub CDGen_Line(X1, Y1, X2, Y2) ' ��λͼ�����ϻ��� Dim DX, DY, DeltaT, i DX = X2 - X1 DY = Y2 - Y1 If Abs(DX) > Abs(DY) Then DeltaT = Abs(DX) Else DeltaT = Abs(DY) If DeltaT = 0 Then CDGen_PSet CInt(X1),CInt(Y1) Else For i = 0 To DeltaT CDGen_PSet CInt(X1 + DX * i / DeltaT), CInt(Y1 + DY * i / DeltaT) Next End If End Sub Sub CDGen_FowardDraw(nLength) ' ����ǰ��ʷ������ָ�����Ȳ��ƶ���ʣ�������ʾ��������/�������»��ƣ�������ʾ��������/�������ϻ��� nLength = nLength * (1 + (Rnd * 2 - 1) * nLengthRandom / 100) ReDim Preserve Lines(3, LineCount) Lines(0, LineCount) = CursorX Lines(1, LineCount) = CursorY CursorX = CursorX + DirX * nLength CursorY = CursorY + DirY * nLength Lines(2, LineCount) = CursorX Lines(3, LineCount) = CursorY LineCount = LineCount + 1 End Sub Sub CDGen_SetDirection(nAngle) ' ��ָ���Ƕ��趨���ʷ���, ������ʾ��Ե�ǰ����˳ʱ��ı䷽������ʾ��Ե�ǰ������ʱ��ı䷽�� Dim DX, DY nAngle = (nAngle + (Rnd * 2 - 1) * nAngleRandom) / 180 * 3.1415926 DX = DirX DY = DirY DirX = DX * Cos(nAngle) - DY * Sin(nAngle) DirY = DX * Sin(nAngle) + DY * Cos(nAngle) End Sub Sub CDGen_MoveToMiddle(nActionIndex, nPercent) ' �����ʹ���ƶ���ָ���������м���ϣ�nPercentΪ�м�λ�õİٷֱ� Dim DeltaX, DeltaY DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex) DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex) CursorX = Lines(0, nActionIndex) + DeltaX * nPercent / 100 CursorY = Lines(1, nActionIndex) + DeltaY * Abs(DeltaY) * nPercent / 100 End Sub Sub CDGen_MoveCursor(nActionIndex) ' �����ʹ���ƶ���ָ����������ʼ���� CursorX = Lines(0, nActionIndex) CursorY = Lines(1, nActionIndex) End Sub Sub CDGen_Close(nActionIndex) ' ����ǰ���λ����ָ����������ʼ��պϲ��ƶ���� ReDim Preserve Lines(3, LineCount) Lines(0, LineCount) = CursorX Lines(1, LineCount) = CursorY CursorX = Lines(0, nActionIndex) CursorY = Lines(1, nActionIndex) Lines(2, LineCount) = CursorX Lines(3, LineCount) = CursorY LineCount = LineCount + 1 End Sub Sub CDGen_CloseToMiddle(nActionIndex, nPercent) ' ����ǰ���λ����ָ���������м��պϲ��ƶ���ʣ�nPercentΪ�м�λ�õİٷֱ� Dim DeltaX, DeltaY ReDim Preserve Lines(3, LineCount) Lines(0, LineCount) = CursorX Lines(1, LineCount) = CursorY DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex) DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex) CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100 CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100 Lines(2, LineCount) = CursorX Lines(3, LineCount) = CursorY LineCount = LineCount + 1 End Sub Sub CDGen_Flush(X0, Y0) ' ���յ�ǰ�Ļ��ʶ������л���λͼ���� Dim MaxX, MinX, MaxY, MinY Dim DeltaX, DeltaY, StepX, StepY, OffsetX, OffsetY Dim i MaxX = MinX = MaxY = MinY = 0 For i = 0 To LineCount - 1 If MaxX < Lines(0, i) Then MaxX = Lines(0, i) If MaxX < Lines(2, i) Then MaxX = Lines(2, i) If MinX > Lines(0, i) Then MinX = Lines(0, i) If MinX > Lines(2, i) Then MinX = Lines(2, i) If MaxY < Lines(1, i) Then MaxY = Lines(1, i) If MaxY < Lines(3, i) Then MaxY = Lines(3, i) If MinY > Lines(1, i) Then MinY = Lines(1, i) If MinY > Lines(3, i) Then MinY = Lines(3, i) Next DeltaX = MaxX - MinX DeltaY = MaxY - MinY If DeltaX = 0 Then DeltaX = 1 If DeltaY = 0 Then DeltaY = 1 MaxX = MinX MaxY = MinY If DeltaX > DeltaY Then StepX = (nPixelWidth - 2) / DeltaX StepY = (nPixelHeight - 2) / DeltaX OffsetX = 0 OffsetY = (DeltaX - DeltaY) / 2 Else StepX = (nPixelWidth - 2) / DeltaY StepY = (nPixelHeight - 2) / DeltaY OffsetX = (DeltaY - DeltaX) / 2 OffsetY = 0 End If For i = 0 To LineCount - 1 Lines(0, i) = Round((Lines(0, i) - MaxX + OffsetX) * StepX, 0) Lines(1, i) = Round((Lines(1, i) - MaxY + OffsetY) * StepY, 0) Lines(2, i) = Round((Lines(2, i) - MinX + OffsetX) * StepX, 0) Lines(3, i) = Round((Lines(3, i) - MinY + OffsetY) * StepY, 0) CDGen_Line Lines(0, i) + X0 + 1, Lines(1, i) + Y0 + 1, Lines(2, i) + X0 + 1, Lines(3, i) + Y0 + 1 Next End Sub Sub CDGen_Char(cChar, X0, Y0) ' ��ָ�����괦����ָ���ַ���λͼ���� CDGen_Reset Select Case cChar Case "0" CDGen_SetDirection -60 ' ��ʱ��60��(����ڴ�ֱ��) CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection -60 ' ��ʱ��60�� CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 1.5 ' ����1.5����λ CDGen_SetDirection -60 ' ��ʱ��60�� CDGen_FowardDraw 0.7 ' ����0.7����λ CDGen_SetDirection -60 ' ˳ʱ��120�� CDGen_FowardDraw 0.7 ' ����0.7����λ CDGen_Close 0 ' ��յ�ǰ�����0��(0��ʼ) Case "1" CDGen_SetDirection -90 ' ��ʱ��90��(����ڴ�ֱ��) CDGen_FowardDraw 0.5 ' ����0.5����λ CDGen_MoveToMiddle 0, 50 ' �ƶ����ʵ�λ�õ���0��(0��ʼ)��50%�� CDGen_SetDirection 90 ' ��ʱ��90�� CDGen_FowardDraw -1.4 ' ���������1.4����λ CDGen_SetDirection 30 ' ��ʱ��30�� CDGen_FowardDraw 0.4 ' ����0.4����λ Case "2" CDGen_SetDirection 45 ' ˳ʱ��45��(����ڴ�ֱ��) CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection -120 ' ��ʱ��120�� CDGen_FowardDraw 0.4 ' ����0.4����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.6 ' ����0.6����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 1.6 ' ����1.6����λ CDGen_SetDirection -135 ' ��ʱ��135�� CDGen_FowardDraw 1.0 ' ����1.0����λ Case "3" CDGen_SetDirection -90 ' ��ʱ��90��(����ڴ�ֱ��) CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection 135 ' ˳ʱ��135�� CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection -120 ' ��ʱ��120�� CDGen_FowardDraw 0.6 ' ����0.6����λ CDGen_SetDirection 80 ' ˳ʱ��80�� CDGen_FowardDraw 0.5 ' ����0.5����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.5 ' ����0.5����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.5 ' ����0.5����λ Case "4" CDGen_SetDirection 20 ' ˳ʱ��20��(����ڴ�ֱ��) CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection -110 ' ��ʱ��110�� CDGen_FowardDraw 1.2 ' ����1.2����λ CDGen_MoveToMiddle 1, 60 ' �ƶ����ʵ�λ�õ���1��(0��ʼ)��60%�� CDGen_SetDirection 90 ' ˳ʱ��90�� CDGen_FowardDraw 0.7 ' ����0.7����λ CDGen_MoveCursor 2 ' �ƶ����ʵ���2��(0��ʼ)�Ŀ�ʼ�� CDGen_FowardDraw -1.5 ' ���������1.5����λ Case "5" CDGen_SetDirection 90 ' ˳ʱ��90��(����ڴ�ֱ��) CDGen_FowardDraw 1.0 ' ����1.0����λ CDGen_SetDirection -90 ' ��ʱ��90�� CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection -90 ' ��ʱ��90�� CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection 30 ' ˳ʱ��30�� CDGen_FowardDraw 0.4 ' ����0.4����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.4 ' ����0.4����λ CDGen_SetDirection 30 ' ˳ʱ��30�� CDGen_FowardDraw 0.5 ' ����0.5����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.8 ' ����0.8����λ Case "6" CDGen_SetDirection -60 ' ��ʱ��60��(����ڴ�ֱ��) CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection -60 ' ��ʱ��60�� CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 1.5 ' ����1.5����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 0.7 ' ����0.7����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 0.5 ' ����0.5����λ CDGen_CloseToMiddle 2, 50 ' ����ǰ����λ�����2��(0��ʼ)��50%����� Case "7" CDGen_SetDirection 180 ' ˳ʱ��180��(����ڴ�ֱ��) CDGen_FowardDraw 0.3 ' ����0.3����λ CDGen_SetDirection 90 ' ˳ʱ��90�� CDGen_FowardDraw 0.9 ' ����0.9����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 1.3 ' ����1.3����λ Case "8" CDGen_SetDirection -60 ' ��ʱ��60��(����ڴ�ֱ��) CDGen_FowardDraw -0.8 ' ���������0.8����λ CDGen_SetDirection -60 ' ��ʱ��60�� CDGen_FowardDraw -0.8 ' ���������0.8����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection 110 ' ˳ʱ��110�� CDGen_FowardDraw -1.5 ' ���������1.5����λ CDGen_SetDirection -110 ' ��ʱ��110�� CDGen_FowardDraw 0.9 ' ����0.9����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.8 ' ����0.8����λ CDGen_SetDirection 60 ' ˳ʱ��60�� CDGen_FowardDraw 0.9 ' ����0.9����λ CDGen_SetDirection 70 ' ˳ʱ��70�� CDGen_FowardDraw 1.5 ' ����1.5����λ CDGen_Close 0 ' ��յ�ǰ�����0��(0��ʼ) Case "9" CDGen_SetDirection 120 ' ��ʱ��60��(����ڴ�ֱ��) CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection -60 ' ��ʱ��60�� CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection -60 ' ˳ʱ��120�� CDGen_FowardDraw -1.5 ' ����1.5����λ CDGen_SetDirection -60 ' ˳ʱ��120�� CDGen_FowardDraw -0.7 ' ���������0.7����λ CDGen_SetDirection -60 ' ˳ʱ��120�� CDGen_FowardDraw -0.7 ' ����0.7����λ CDGen_SetDirection 120 ' ˳ʱ��120�� CDGen_FowardDraw 0.7 ' ���������0.7����λ CDGen_SetDirection -60 ' ˳ʱ��120�� CDGen_FowardDraw 0.5 ' ����0.5����λ CDGen_CloseToMiddle 2, 50 ' ����ǰ����λ�����2��(0��ʼ)��50%����� End Select CDGen_Flush X0, Y0 End Sub Sub CDGen_Blur() ' �Բ�����λͼ�����ữ���� Dim i, j For j = 1 To PicHeight - 2 For i = 1 To PicWidth - 2 If Buf(j, i) = 0 Then If ((Buf(j, i - 1) Or Buf(j + 1, i)) And 1) <> 0 Then ' �����ǰ���ǿհ㣬�����������ĸ�������һ��������ɫ�㣬��õ����ữ���� Buf(j, i) = 2 End If End If Next Next End Sub Sub CDGen_NoisyLine() Dim i For i=1 To nNoisyLineCount CDGen_Line Rnd * PicWidth, Rnd * PicHeight, Rnd * PicWidth, Rnd * PicHeight Next End Sub Sub CDGen_NoisyDot() ' �Բ�����λͼ������㴦�� Dim i, j, NoisyDot, CurDot For j = 0 To PicHeight - 1 For i = 0 To PicWidth - 1 If Buf(j, i) <> 0 Then If Rnd < nColorNoisyDotOdds Then Buf(j, i) = 0 Else Buf(j, i) = nSaturation End If Else If Rnd < nBlankNoisyDotOdds Then Buf(j, i) = nSaturation Else Buf(j, i) = 0 End If End If Next Next End Sub Sub CDGen() ' ����λͼ���� Dim i, Ch, w, x, y DigtalStr = "" CDGen_Clear w = nImgWidth / nCharCount For i = 0 To nCharCount - 1 nPixelWidth = w * (1 + (Rnd * 2 - 1) * nCharWidthRandom / 100) nPixelHeight = nImgHeight * (1 - Rnd * nCharHeightRandom / 100) x = nSpaceX + w * (i + (Rnd * 2 - 1) * nPositionXRandom / 100) y = nSpaceY + nImgHeight * (Rnd * 2 - 1) * nPositionYRandom / 100 Ch = Mid(cCharSet, Int(Rnd * Len(cCharSet)) + 1, 1) DigtalStr = DigtalStr + Ch CDGen_Char Ch, x, y Next CDGen_Blur CDGen_NoisyLine CDGen_NoisyDot End Sub Function HSBToRGB(vH, vS, vB) ' ����ɫֵ��HSBת��ΪRGB Dim aRGB(3), RGB1st, RGB2nd, RGB3rd Dim nH, nS, nB Dim lH, nF, nP, nQ, nT vH = (vH Mod 360) If vS > 100 Then vS = 100 ElseIf vS < 0 Then vS = 0 End If If vB > 100 Then vB = 100 ElseIf vB < 0 Then vB = 0 End If If vS > 0 Then nH = vH / 60 nS = vS / 100 nB = vB / 100 lH = Int(nH) nF = nH - lH nP = nB * (1 - nS) nQ = nB * (1 - nS * nF) nT = nB * (1 - nS * (1 - nF)) Select Case lH Case 0 aRGB(0) = nB * 255 aRGB(1) = nT * 255 aRGB(2) = nP * 255 Case 1 aRGB(0) = nQ * 255 aRGB(1) = nB * 255 aRGB(2) = nP * 255 Case 2 aRGB(0) = nP * 255 aRGB(1) = nB * 255 aRGB(2) = nT * 255 Case 3 aRGB(0) = nP * 255 aRGB(1) = nQ * 255 aRGB(2) = nB * 255 Case 4 aRGB(0) = nT * 255 aRGB(1) = nP * 255 aRGB(2) = nB * 255 Case 5 aRGB(0) = nB * 255 aRGB(1) = nP * 255 aRGB(2) = nQ * 255 End Select Else aRGB(0) = (vB * 255) / 100 aRGB(1) = aRGB(0) aRGB(2) = aRGB(0) End If HSBToRGB = ChrB(Round(aRGB(2), 0)) & ChrB(Round(aRGB(1), 0)) & ChrB(Round(aRGB(0), 0)) End Function Sub CreatValidCode(pSN) Dim i, j, CurColorHue CDGen Session(pSN) = DigtalStr '��¼��Session Dim FileSize, PicDataSize PicDataSize = PicWidth * PicHeight * 3 FileSize = PicDataSize + 54 ' ���BMP�ļ���Ϣͷ Response.BinaryWrite ChrB(66) & ChrB(77) & ChrB(FileSize Mod 256) & ChrB((FileSize \ 256) Mod 256) & ChrB((FileSize \ 256 \ 256) Mod 256) & ChrB(FileSize \ 256 \ 256 \ 256) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0) ' ���BMPλͼ��Ϣͷ Response.BinaryWrite ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(PicWidth Mod 256) & ChrB((PicWidth \ 256) Mod 256) & ChrB((PicWidth \ 256 \ 256) Mod 256) & ChrB(PicWidth \ 256 \ 256 \ 256) & ChrB(PicHeight Mod 256) & ChrB((PicHeight \ 256) Mod 256) & ChrB((PicHeight \ 256 \ 256) Mod 256) & ChrB(PicHeight \ 256 \ 256 \ 256) & ChrB(1) & ChrB(0) & ChrB(24) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(PicDataSize Mod 256) & ChrB((PicDataSize \ 256) Mod 256) & ChrB((PicDataSize \ 256 \ 256) Mod 256) & ChrB(PicDataSize \ 256 \ 256 \ 256) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) ' ������λͼ���� If nColorHue = -1 Then CurColorHue = Int(Rnd * 360) ElseIf nColorHue <> -2 Then CurColorHue = nColorHue End If For j = 0 To PicHeight - 1 For i = 0 To PicWidth - 1 If nColorHue = -2 Then Response.BinaryWrite HSBToRGB(0, 0, 100 - Buf(PicHeight - 1 - j, i)) Else Response.BinaryWrite HSBToRGB(CurColorHue, Buf(PicHeight - 1 - j, i), 100) End If Next Next End Sub %>