williammalo/README.md

## README.md

      
    Raw
  

              README.md
            
          
    This function checks if a canvas pixel is black.
This is very useful for making pixel-perfect collisions in a javascript game.
argument x and y are for the coordinates of said pixel.
argument c is for the canvas context.

  
## annotated.js
function(x,y,c){return window[c].getImageData(x,y,1,1).data[1]<20}

## index.js
function(x,y,c){return window[c].getImageData(x,y,1,1).data[1]<20}

## package.json
{
  "name": "PixCheck",

  "description": "This function checks if a certain canvas pixel is black",

  "keywords": [
    "canvas",
    "collision",
    "pixel",
    "data",
    "html"
  ]
}

## test.html
<!DOCTYPE html>
<title>Foo</title>
<div>Expected value: <b>undefined</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>
  // write a small example that shows off the API for your example
  // and tests it in one fell swoop.

  var myFunction = function(){ /* the code here should be identical to the entry. */ }

  document.getElementById( "ret" ).innerHTML = myFunction()
</script>
	{
	"name": "PixCheck",

	"description": "This function checks if a certain canvas pixel is black",

	"keywords": [
	"canvas",
	"collision",
	"pixel",
	"data",
	"html"
	]
	}
	<!DOCTYPE html>
	<title>Foo</title>
	<div>Expected value: <b>undefined</b></div>
	<div>Actual value: <b id="ret"></b></div>
	<script>
	// write a small example that shows off the API for your example
	// and tests it in one fell swoop.

	var myFunction = function(){ /* the code here should be identical to the entry. */ }

	document.getElementById( "ret" ).innerHTML = myFunction()
	</script>