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Thread: Help wanted on how to achieve a Left to Right page turning effect (Book Flip script)

  1. #1
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    Default Help wanted on how to achieve a Left to Right page turning effect (Book Flip script)

    From: Luiz Antonio S. Pereira

    (June, 05)



    I am a teacher, with no programming knowledge, Can you help me?


    Could you apply the necessary changes to the beneath code to
    achieve a LEFT to RIGHT page turning effect.




    P.S.: The beneath code is a (full working) short version from the
    original code. (The focus here is only the page turning effect.)





    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

    <!-- saved from url=(0055)http://www.dynamicdrive.com/dynamicindex14/bookflip.htm -->

    <HTML>
    <HEAD>
    <META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
    </HEAD>

    <BODY onload=ImageBook()>


    <SCRIPT type=text/javascript>/*(c) Ger Versluis 2003*/


    var B_LI;
    var B_MI;
    var B_RI;
    var B_MSz;
    var B_Angle=0;
    var B_CrImg=6;
    var B_Direction=1;
    var Book_Speed=15;
    var Book_Vertical_Turn=0;
    var Book_Image_Width=140;
    var Book_Image_Height=225;


    Book_Image_Sources=new Array
    (
    "photo1.jpg","",
    "photo2.jpg","",
    "photo3.jpg","",
    "photo4.jpg",""
    );


    var B_Pre_Img=new Array(Book_Image_Sources.length);



    function ImageBook()
    {

    if(document.getElementById)
    {
    for(i=0;i<Book_Image_Sources.length;i+=2)
    {
    B_Pre_Img[i]=new Image();
    B_Pre_Img[i].src=Book_Image_Sources[i]
    }


    Book_Div=document.getElementById("Book");


    B_LI=document.createElement("img");Book_Div.appendChild(B_LI);
    B_RI=document.createElement("img");Book_Div.appendChild(B_RI);
    B_MI=document.createElement("img");Book_Div.appendChild(B_MI);


    B_LI.style.position=B_MI.style.position=B_RI.style.position="absolute";
    B_LI.style.zIndex=0; B_MI.style.zIndex=1; B_RI.style.zIndex=0;
    B_LI.style.top=(Book_Vertical_Turn?Book_Image_Height+1:0)+"px"; B_MI.style.top=0+"px"; B_RI.style.top=0+"px";
    B_LI.style.left=0+"px";
    B_MI.style.left=(Book_Vertical_Turn?0:Book_Image_Width+1)+"px";
    B_RI.style.left=(Book_Vertical_Turn?0:Book_Image_Width+1)+"px";
    B_LI.style.height=B_MI.style.height=B_RI.style.height=Book_Image_Height+"px";
    B_LI.style.width=B_MI.style.width=B_RI.style.width=Book_Image_Width+"px";


    B_LI.style.borderStyle=B_MI.style.borderStyle=B_RI.style.borderStyle="solid";
    B_LI.style.borderWidth=B_MI.style.borderWidth=B_RI.style.borderWidth=1+"px";
    B_LI.style.borderColor=B_MI.style.borderColor=B_RI.style.borderColor="gray";


    B_LI.src=B_Pre_Img[0].src; B_MI.src=B_Pre_Img[2].src; B_RI.src=B_Pre_Img[4].src;


    BookImages()
    }

    }




    function BookImages()
    {

    B_MSz=Math.abs(Math.round(Math.cos(B_Angle)*Book_Image_Width));
    MidOffset=B_Direction?Book_Image_Width+1:Book_Image_Width-B_MSz;
    B_MI.style.left=MidOffset+"px";
    B_MI.style.width=B_MSz+"px";


    B_Angle+=Book_Speed/720*Math.PI;


    if(B_Angle>=Math.PI/2&&B_Direction)
    {
    B_Direction=0;
    if(B_CrImg==Book_Image_Sources.length)B_CrImg=0;
    B_MI.src=B_Pre_Img[B_CrImg].src;
    B_MI.lnk=Book_Image_Sources[B_CrImg+1];
    B_CrImg+=2;
    }


    if(B_Angle>=Math.PI)
    {


    }

    else setTimeout("BookImages()",50)

    }


    </SCRIPT>


    <DIV id=Book style="POSITION: relative"><IMG height=227 src="placeholder.gif" width=144> </DIV>


    </BODY>
    </HTML>

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