所以我有一个wordpress页面正在运行一个页面,让用户可以构建一个小漫画,生成3个代表漫画的图像。
用户可以自定义头发,眼睛,T恤等5个场景之间的选择,然后再根据场景的结果选择3个选项......
...最终的输出是3张图片,或者更确切地说是3张分层的png图像 - 分层的图像当然是选择的头发,眼睛,T恤等,以及任何情景选择的背景。< / p>
这个分层的图像集需要成为一个可共享的图像,所以我决定使用html2canvas渲染所有可能的图像,这些图像可以从1260的选择组合中创建。
我正在尝试预先生成所有这些图像,因为html2canvas对于实时使用来说有点冒犯,所以我试图以编程方式执行此操作。
图像生成贯穿我的1260种可能的组合阵列,直到大约一半我突然得到拆分未定义错误,我的代码首先输出所有1260个索引,所以我可以检查所有值都很好,一切似乎都没问题但我是真是难倒。
JS代码如下
// THIS 2D ARRAY IS A REPRESENTATION OF THE POSSIBLE VALUES A USER CAN CHOOSE PER HTML PANEL, AS A USER MAKES A CHOICE THE CURRENT PANEL HIDES AND REVEALS THE NEXT
var allArrays = [['0','1','2','3','4','5','6'], ['1','2'], ['0','1','2','3','4','5'], ['1','2','3','4','5'], ['1','2','3']];
// THIS FUNCTION BELOW USES RECURSION TO RUN THROUGH THE ABOVE ARRAY AND FIND ALL POSSIBLE UNIQUE COMBINATIONS A USER COULD SELECT OF WHICH THERE ARE 1260
function allPossibleCases(arr) {
if (arr.length == 1) {
return arr[0];
} else {
var result = [];
var allCasesOfRest = allPossibleCases(arr.slice(1));
for (var i = 0; i < allCasesOfRest.length; i++) {
for (var j = 0; j < arr[0].length; j++) {
result.push(arr[0][j] + " " + allCasesOfRest[i]);
}
}
return result;
}
}
// BEGIN THE RECURSION AND RETURN 2D ARRAY OF THE RESULTS
var uniqueIds = allPossibleCases(allArrays);
// THE BELOW FLATTENS THE RESULTING 2D ARRAY OUTPUT FROM THE 'allPossibleCases' FUNCTION TO A SINGLE ARRAY WITH ALL 1260
// EACH 1260 INDICES CONTAINS A UNIQUE COMBINATION OF THE NUMBERS BUT AS A STRING WITH SPACES e.g. "0 1 0 1 1", "1 1 0 1 1", "2 1 0 1 1"
var merged = [];
merged = merged.concat.apply(merged, uniqueIds);
// OUTPUT THE FLATTEND ARRAY WITH ALL 1260 VALUES
console.log(merged);
var id1 = 0;
var id2 = 0;
var id3 = 0;
var id4 = 0;
var id5 = 0;
// INCREMENTATION VALUE FOR myTimer FUNCTION
var i = 0;
// THE FUNCTION BELOW STEPS THROUGH EACH OF THE ARRAY ITEMS IN THE 'merged' ARRAY ALL 1260 USING i AS THE INCREMENTOR
function myTimer() {
// FOR EACH INDEX IN THE ARRAY I NEED TO TAKE THE FIVE INDIVIDUAL STRING INTEGERS AND PUSH THEM INTO INDIVIDUAL
// TEXT INPUTS ON MY WEBSITES FRONTEND TO PROGRAMMATICALLY SIMULATE A USER HAVING GONE THROUGH AND MANUALLY MADE THESE CHOICES
// I NEED TO USE JAVASCRIPT SPLIT TO PULL OUT EACH STRING INTEGER SO THAT I CAN USE IT ON MY FRONTEND AND ACHIEVE THIS USER FAKING
var str = merged[i];
console.log('Current render increment = '+i);
console.log('The arrays current increment = '+str);
var res = str.split(" ");
// I CAST THE SPLIT STRING INTEGERS TO PROPER INTEGERS
id1 = parseInt(res[0]);
id2 = parseInt(res[1]);
id3 = parseInt(res[2]);
id4 = parseInt(res[3]);
id5 = parseInt(res[4]);
// NOW I PUSH EACH OF THESE VALUES INTO MY FORM TO FAKE A USER HAVING MADE ONE OF A POTENTIAL 1260 SET OF CHOICES
$('.manualImageGen .hair').val(id1);
$('.manualImageGen .eyes').val(id2);
$('.manualImageGen .outfit').val(id3);
$('.manualImageGen .scenario').val(id4);
$('.manualImageGen .resolution').val(id5);
// THIS LINE FORCES ANGULAR TO UPDATE ITS UI
$('.manualImageGen input').trigger('input');
// THIS IS USED TO TAG THE IMAGE GENERATED BY HTML2CANVAS WITH A UNIQUE ID RELATING TO ONE OF THE 1260
var fileid = res[0]+res[1]+res[2]+res[3]+res[4];
// HTML2CANVAS TAKES A SCREEN SHOT OF THE FINAL IMAGE GENERATED AS A RESULT OF FAKING THE CHOICES THAT WERE GENERATED
html2canvas($('.finalImages'), {
onrendered: function(canvas) {
var data = canvas.toDataURL();
$.ajax({
type: "POST",
url: ajaxurl,
data: {
'action':'nopriv_ra_addrelationstick',
'relStick' : data,
'fileid' : fileid
}
})
.done(function( msg ) {
if( msg == "false" )
{
alert('Sorry but you need to log in to save your R Stick');
}
});
}
});
if(i <= merged.length-1){
i++;
console.log("Items left to render = "+merged.length--);
}else{
clearInterval(myVar);
}
}
// TRIGGER THE SETTIMEOUT LOOP ONCE PER SECOND TO STOP BROWSER FREEZING AND GIVE HTML2CANVAS TIME TO DO ITS THING
var myVar = setInterval(function () {myTimer()}, 1000);
答案 0 :(得分:0)
万一你的域名中有这些图片,这是我的解决方案:
var layer0 = document.getElementById('input_layer0').value;
var layer1 = document.getElementById('input_layer1').value;
var layer2 = document.getElementById('input_layer2').value;
...
var panel = [layers[0][layer0],layers[1][layer1],layers[2][layer2]...];
var c = document.createElement('canvas').getContext('2d');
c.canvas.width = 200;
c.canvas.height = 200;
c.clearRect(0,0,200,200);
for(var i=0;i<panel.length;i++)
c.drawImage(panel[i],0,0);
document.getElementById('result_image').src = c.canvas.toDataURL();
其中“layers”是不同图层的图像数组数组。
i = new Image();
i.src = 'bg1.jpg';
layers[0].push(i);
i = new Image();
i.src = 'bg2.jpg';
layers[0].push(i);
i = new Image();
i.src = 'body_sitting.png';
layers[1].push(i);
i = new Image();
i.src = 'body_standing.png';
layers[1].push(i);
等