Reflect images: Difference between revisions
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A WASSERMANN (talk | contribs) (Created page with "<jsxgraph width="500" height="600"> (function(){ var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-6,6,12,-6], axis:true}); })(); </jsxgraph> ===The JavaScript code==...") |
A WASSERMANN (talk | contribs) No edit summary |
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<jsxgraph width=" | <jsxgraph width="600" height="500"> | ||
(function(){ | (function(){ | ||
var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-6,6,12,-6], axis:true}); | var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-6,6,12,-6], axis:true}); | ||
var p0, p1, p2, p3, p4, p5 | |||
l1, l2, | |||
im1, im2, im3, | |||
t1, t2, | |||
imurl = "/distrib/images/uccellino.jpg", | |||
X, Y, W, H; // Functions defining the position, width and height of the original image. | |||
// Define two line through four points | |||
p0 = board.createElement('point', [0,3]); | |||
p1 = board.createElement('point', [1,1]); | |||
p2 = board.createElement('point', [-3,4]); | |||
p3 = board.createElement('point', [10,4]); | |||
l1 = board.createElement('line', [p0, p1]); | |||
l2 = board.createElement('line', [p2, p3]); | |||
p4 = board.createElement('point', [-2,-2]); | |||
p5 = board.createElement('point', [1,0]); | |||
X = function(){ return Math.min(p4.X(), p5.X()); }; | |||
Y = function(){ return Math.min(p4.Y(), p5.Y()); }; | |||
W = function(){ return Math.abs(p5.X() -p4.X()); }; | |||
H = function(){ return Math.abs(p5.Y() -p4.Y()); }; | |||
im1 = board.create('image',[imurl, [X, Y], [W, H]], {opacity:0.7}); | |||
im2 = board.create('image',[imurl, [X, Y], [W, H]], {opacity:0.7}); | |||
im3 = board.create('image',[imurl, [X, Y], [W, H]], {opacity:0.7}); | |||
t1 = board.createElement('transform', [l1], {type:'reflect'}); | |||
t2 = board.createElement('transform', [l2], {type:'reflect'}); | |||
// Reflect im2 on l1 | |||
t1.bindTo(im2); | |||
// Reflect im2 on l1 and on l2 | |||
t1.bindTo(im3); | |||
t2.bindTo(im3); | |||
board.update(); | |||
})(); | })(); | ||
Revision as of 11:50, 29 July 2011
The JavaScript code
Here is the complete code to accomplish this behaviour.
