Cocos Creator - I have a node that I want to rotate towards another node, here is the code I'm using:
update: function (dt) {
this.rotate();
},
rotate: function () {
var diff = this.target.position - this.node.position;
var angle = Math.atan2(diff.x, diff.y);
this.node.rotation = cc.radiansToDegress(angle);
},
But it's not rotating at all, I tried to search the docs but couldn't find anything helpful.
var diff = this.target.position - this.node.position;
You're basically trying to subtract an object from an object. Check
{'x':2, 'y':3} - {'x':4, 'y':6}
in your JS console. The result is NaN
You need to subtract each dimension manually.
var diff = {
'x' : this.target.position.x - this.node.position.x,
'y':this.target.position.y - this.node.position.y
};
Apologies to necro this question, but since this is a top search result I just wanted to add that the problem here is that the signature of Math.atan2 takes it's coordinates backwards:
Syntax:
Math.atan2(y, x)
Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/atan2
Related
I'm trying to do some re-factoring on my charts to make them re-usable using this as a guide: http://bost.ocks.org/mike/chart/
I'm having problems drawing the lines in my multi-line graph though - specifically passing the data to the x and y values. If I hard code the element names it works, but if I try to use the xValue and yValue objects this does not work. I'm assuming that this is because I'm trying to call a function within the parameter of an other object, but I'm not sure how to get around this. In the exmaple Mike uses d[0] and d[1], but this won't work with JSON data (or I'm not sure how to make it work).
I've posted this JSFiddle so you can see the code. The problem lines are 125 to 131 which in turn is being called from line 165.
var main_line = d3.svg.line()
.interpolate("cardinal")
// Hard coding the elements works
//.x(function(d) { return main_x(d.date); })
//.y(function(d) { return main_y(d.buildFixTime); });
// Passing xValue and yValue does not work
.x(function(d) { return main_x(xValue); })
.y(function(d) { return main_y(yValue); });
http://jsfiddle.net/goodspeedj/fDyLY/
Thank you in advance.
You need to redefine your accessor method within .x() and .y(). The accessor method defines the way that a datum is pulled out of the data that is bound to the selection that you call the line generator on.
Suppose you have a relatively flat data structure such as the following.
data = [{x : 1, y : 2}, {x:1, y:3}, {x:4, y:5}];
You then bind the data to a selection with the following statement
d3.select("body").datum(data).append("path").attr("d",lineGenerator);
Quite a bit is going on underneath this statement. I'll give you a bit more of a walkthrough after showing you a commonly used example.
The important aspect to understand is that similarly to other calls in d3 such as
var exampleRectangles = d3.select("body")
.data(data).enter()
.append("rect")
.attr("width",2)
.attr("height", 3)
.attr("x",function(datum){return datum.x}) // pay attention to this line
.attr("y",0);
d3 is implicitly iterating over each element in your data. For each datum in your data array, in this case there is a total of three datum, you are going to add a rectangle to the dom.
In the line that I tell you to pay attention to you notice that you're defining an anonymous (unnamed) function. What is that datum parameter coming from? It's implicitly being passed to your anonymous function.
So each rectangle has it's own corresponding datum {x : 1, y : 2}, {x:1, y:3}, {x:4, y:5} respectively. Each rectangle's x coordinate is defined by the respective datum.x attribute. Under the sheets, d3 is implicitly looping over the data array that you've defined. A similar approach to the example d3 code could be written as above.
for (var i = 0; i < data.length; i++)
{
d3.select("body").append("rect")
.attr("width",2)
.attr("height", 3)
.attr("x",data[i].x)
.attr("y",0);
}
This follows from the notion of data driven documents (d3). For each item added (a rectangle in the above example a piece of data is tied to it. In the above example you see that there is something kind of similar to your .x() and .y() accessor functions :
.attr("x",function(datum){return datum.x})
This function is telling d3 how to filter over the total datum that's being passed to the .attr() accessor method.
So, you need to determine which data you need to get a hold of to make your .attr("d", lineGenerator)call make sense. The difference between your.datum(data)call and the typical.data(data)call is that instead of parceling the data that's being passed to.data(data)`, the whole array is given as a single piece of data to the line generator function (similar to main_line(data), wherein it will again implicitly loop over the points to construct your path.
So, what you need to do is determine what a single datum will be defined as for your function to operate on.
I'm not going to define that as I don't seem to know quite which information you are operating on, but I would hazard a guess at something like.
.x(xAccessor)
.y(yAccessor)
function xAccessor(datum)
{
return xScale(datum._id.month);
}
function yAccessor(datum)
{
return yScale(datum.buildFixTime);
}
The way you have it set up, xValue and yValue are functions; you have to actually execute them on something to get a value back.
.x(function(d) { return main_x( xValue(d) ); })
.y(function(d) { return main_y( yValue(d) ); });
If you weren't using a scale, you could use
.x(xValue)
.y(yValue);
but only because if you pass in a function d3 executes it for you with the data as a parameter. And that only works for d3 methods that expect functions as possible input -- the scale functions expect data values as input.
I wrote a long piece work for another user last week that you may find useful, explaining methods that accept functions as parameters.
There is an element that get updates using DWR comet command in server side
Like this
Util.setValue("newnumber", number);
So in Client Side I can get it like in simple command like
<div id = newnumber></div>
Now I want to add the data in HighCharts' live chart. My question is there any event command that says that the "newnumber" value is updated so that I can add the new data in highchart series?
Ok, I figured it out.
The only way to get value in dwr
var xx = dwr.util.getValue(newnumber);
And I used periodic function to get latest value add in series of Highcharts
setInterval(function() {
var yy = parseInt(xx);
var x = (new Date()).getTime(), // current time
y = yy;
series.addPoint([x, y], true, true);
}, 1000);
I am currently having some issues configuring a simple graph using Google App Scripts. I seem to be unable to find the correct documentation in order to progress any further!
I have everything hooked up pulling data from a couple of spreadsheets, so that aspect is fine!
I see that there are various ways in order to customise the looks of a chart and there are tools available for example:
http://imagecharteditor.appspot.com/
http://code.google.com/apis/ajax/playground/?type=visualization
I wish to add colours to my bar charts like in this example
http://code.google.com/apis/ajax/playground/?type=visualization#image_multicolor_bar_chart
Additionally in the first link there are options to create sections using the range marker tool. I was hoping that with these tools I could copy the code across to use in my App Script Chart.
The only way I can see this working is using .setOption(string, object)
I've tried this...
var data = Charts.newDataTable()
.addColumn(Charts.ColumnType.STRING, 'Month')
.addColumn(Charts.ColumnType.NUMBER, 'Mark Achieved')
for(var x=0; x < ChartData.length;x++){
data.addRow(ChartData[x]);
}
data.build();
var chart = Charts.newColumnChart()
.setDataTable(data)
.setDimensions(1000, 600)
.setRange(0, 100)
.setTitle('Test Scores')
.setLegendPosition(Charts.Position.BOTTOM)
.setOption('options',{cht: 'bvs', chco: 'A2C180,3D7930', max: 100})
.build();
app.add(chart);
any help would be much appreciated!
EDIT
The options you are trying to use are applicable to the static image charts (which are now deprecated), and won't work with ColumnCharts. ColumnCharts color the bars by series, not by data point, so if you want multi-colored bars, you have to separate them out into different data series. I wrote a hack that does this (see on jsfiddle for the standard javascript version). My reading of the AppsScript implementation of the Visualization API seems to preclude using calculated columns in the DataViews, but it is possible that the documentation is incomplete here. Try creating a view like this:
// add one calculated column for each month
var dataViewDefinition = Charts.newDataViewDefinition().setColumns([0, {
type: Charts.ColumnType.NUMBER,
label: 'Mark Achieved',
calc: function (dt, row) {
if (dt.getValue(row, 0) == 'January') ? dt.getValue(row, 1) : null;
}
}, {
type: Charts.ColumnType.NUMBER,
label: 'Mark Achieved',
calc: function (dt, row) {
if (dt.getValue(row, 0) == 'February') ? dt.getValue(row, 1) : null;
}
}/*...*/]);
It is probable that this needs to be tweaked, and possible that it won't work at all, in which case you would have to either change the query of the spreadsheet or rearrange the structure of the spreadsheet.
As far as adding the ranges to the chart, can you elaborate more on what you would like those to look like?
I am using Vectors in Flash 10 for the first time, and I want to create it in the same way I used to do with Arrays, e.g:
var urlList : Array = [url1, url2, url3];
I have tried various different methods but none seem to work, and I have settled on the following as a solution:
var urlList : Vector.<String> = new Vector.<String>();
urlList.push(url1, url2, url3);
Is this even possible?
When it doubt, check the AS3 docs. :)
var urlList : Vector.<String> = new <String>["str1", "str2", "str3"];
trace(urlList);
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/Vector.html#Vector()
Direct quote of the line I adapted this from in the documentation:
To create a pre-populated Vector instance, use the following syntax instead of using the parameters specified below:
// var v:Vector.<T> = new <T>[E0, ..., En-1 ,];
// For example:
var v:Vector.<int> = new <int>[0,1,2,];
You coerce an array to a Vector:
var urlList:Vector.<String> = Vector.<String>([url1, url2, url3]);
I was trying to make a similar thing with the game SameGame (ie. the block above the removed blocks fall downward). Before trying this with an Array that contains MovieClips, this code worked (tried it with int values). With MovieClips on the array, it seems not working the same way.
With int values, example:
popUp(0, 4): Before: 1,2,3,4,5,6,7,8,9,10; After: 1,2,3,4,6,7,8,9,10
But with MovieClips:
popUp(0, 4): Before: 1,2,3,4,5,6,7,8,9,10; After; 1,2,3,4
// Assume the numbers are movieclips XD
Basically, it strips everything else, rather than just the said block >_<
Here's the whole method. Basically, two extra arrays juggle the values above the soon-to-be removed value, remove the value, then re-stack it to the original array.
What could be wrong with this? And am I doing the right thing for what I really wanted to emulate?
function popUp(col:uint, row:uint)
{
var tempStack:Array = new Array();
var extraStack:Array = new Array();
tempStack = IndexArray[col];
removeChild(tempStack[0]);
for(var ctr:uint = tempStack.length-(row+1); ctr > 0; ctr--)
{
removeChild(tempStack[ctr]);
extraStack.push(tempStack.pop());
trace(extraStack);
}
tempStack.pop();
for(ctr = extraStack.length; ctr > 0; ctr--)
{
tempStack.push(extraStack.pop());
//addChild(tempStack[ctr]);
}
IndexArray[col] = tempStack;
}
PS: If it's not too much to ask, are there free step-by-step guides on making a SameGame in AS3 (I fear I might not be doing things right)? Thanks in advance =)
I think you just want to remove an element and have everything after that index shift down a place to fill what you removed. There's an inbuilt function for this called splice(start:uint, length:uint);
Parameters:
start - the index to start removing elements from
length - the amount of elements to remove
var ar:Array = ["hello","there","sir"];
ar.splice(1, 1);
ar is now -> ["hello", "sir"];
As per question:
Here's an example with different types of elements:
var ar:Array = [new MovieClip(), "some string", new Sprite(), 8];
ar.splice(2, 1);
trace(ar); // [object MovieClip], some string, 8
And further example to display the indexes being changed:
trace(ar[2]); // was [object Sprite], is now 8