Lattices: Difference between revisions

Revision as of 07:29, 20 April 2009

@@ Line 3: / Line 3: @@
 var b1 = brd.createElement('point', [1,0], {style:6,name:''});
 var b2 = brd.createElement('point', [0,1], {style:6,name:''});
-//var v1 = brd.createElement('vector', [[0,0],b1]);
-//var v2 = brd.createElement('vector', ['Origin',b2]);
 var i, j;
 for (i=-5;i<6;i++) for (j=-5;j<6;j++) {
@@ Line 13: / Line 11: @@
         ], {name:'',style:4});
 }}
+</jsxgraph>
+<jsxgraph height="500" width="600" board="board"  box="box2">
+brd2 = JXG.JSXGraph.initBoard('box2', {originX: 250, originY: 250, unitX: 50, unitY: 50, axis:true});
+var b3 = brd2.createElement('point', [1,0], {style:6,name:''});
+var b4 = brd2.createElement('point', [0,1], {style:6,name:''});
+var i, j;
+var p = [];
+for (i=-5;i<6;i++) for (j=-5;j<6;j++) {
+  if (!(i==1&&j==0) && !(i==0&&j==1)) {
+  p[i*11+j] = brd2.createElement('point',[
+       function(x,y){ return function(){ return x*b3.X()+y*b4.X(); };}(i,j),
+       function(x,y){ return function(){ return x*b3.Y()+y*b4.Y(); };}(i,j)
+       ], {name:'',style:4});
+  brd2.createElement('point',[p[i*11+j],0.5]);
+}}
 </jsxgraph>
 [[Category:Examples]]