E-book comb.as

function topLeft() {

w = (width-margin*2)/2; h = height-margin*2; ox = margin+w; oy = margin;

// Get mouse coords relative to book middle, reverse ox x = ox-_xmouse; y = _ymouse-oy;

// constrain mouse to radius W a = Math.atan2(y,x); r = Math.sqrt(x*x+y*y); if (r>w) r=w; x = Math.cos(a)*r; y = Math.sin(a)*r;

// Calculate point Z and dy,dx of line C dx = w-x; dy = y; Zx = x+dx/2; Zy = y-dy/2;

// Calculate line D Px = Zx-Zy*dy/dx; Py = 0; Qx = w;

if (dy*dy<1) { a = 0; Qx = x; Qy = Ry = h; Rx = (x+w)/2; } else { Qy = Zy+(w-Zx)*dx/dy; if (Qy>h || Qy<0) { a = Math.atan2(Qy-y,Qx-x); if (Qy<0) a += Math.PI; Qx = x+Math.cos(a)*h; Qy = y+Math.sin(a)*h; Rx = Qx+(Qy-h)/(y-Py)*(Px-x); Ry = h; } else { Rx = Qx; Ry = Qy; } if (Qy==0) Rx = w-Qx; if (Rx<0) return; }

// Draw page clear(); lineStyle(3,0); moveTo(ox,oy); lineTo(ox,oy+h); moveTo(ox+w,oy); lineTo(ox-Px,oy+Py); lineTo(ox-Rx,oy+Ry); lineTo(ox-Rx,oy+h); lineTo(ox+w,oy+h); lineTo(ox+w,oy);

// Draw fold beginFill(0xdddddd,100); moveTo(ox-x,oy+y); lineTo(ox-Px,oy+Py); lineTo(ox-Rx,oy+Ry); lineTo(ox-Qx,oy+Qy); lineTo(ox-x,oy+y); endFill();

// orient right_next page _root.left_next._x = ox-x; _root.left_next._y = oy+y; _root.left_next._rotation = -a*57.29578;

}