function Game(canv_width,canv_height){
//set the canvas attributes
this.width=canv_width,
this.height=canv_height,
//create canvas elements
this.canvas=document.createElement("CANVAS"),
//set canvas width
this.canvas.width=this.width,
//set canvas height
this.canvas.height=this.height,
//push created <canvas> tag in <body>
document.body.appendChild(this.canvas),
//get the context
this.context=this.canvas.getContext('2d')
};
//Image object with draw function without else properties
//path-path to image file
function HImage(path){
//create new Image and set path to file
this.img=new Image(),
this.img.src=path,
//flag of loading image
this.isLoad=false,
//when image is load
this.setToTrue=function(){
//set flag to true
this.isLoad=true;
},
this.img.onload=this.setToTrue(),
//drawing image in position px,py. game_object - object of Game class
this.draw=function(game_object,px,py){
//if image is load
if (this.isLoad==true){
//draw the image in position
//game_object.context.fillStyle='#FFCCFF';
//game_object.context.fillRect(0,0,100,100);
game_object.context.drawImage(this.img,px,py);
}
}
};
var game=new Game(800,600);
image=new HImage('img.png');
image.draw(game,200,200);
function Game(canv_width,canv_height){
//set the canvas attributes
this.width=canv_width,
this.height=canv_height,
//create canvas elements
this.canvas=document.createElement("CANVAS"),
//set canvas width
this.canvas.width=this.width,
//set canvas height
this.canvas.height=this.height,
//push created <canvas> tag in <body>
document.body.appendChild(this.canvas),
//get the context
this.context=this.canvas.getContext('2d')
};
//Image object with draw function without else properties
//path-path to image file
function HImage(path){
//create new Image and set path to file
this.img=new Image();
this.img.src=path;
var _this = this;//Добавил тут кое-что
//flag of loading image
this.isLoad=false;
//when image is load
this.setToTrue=function(){
//set flag to true
this.isLoad=true;
},
this.img.onload=this.setToTrue();
//drawing image in position px,py. game_object - object of Game class
this.draw=function(game_object,px,py){
//if image is load
if (this.isLoad==true){
//draw the image in position
//game_object.context.fillStyle='#FFCCFF';
//game_object.context.fillRect(0,0,100,100);
game_object.context.drawImage(_this.img,px,py);//И тут заменил this На _this созданный ранее, так как в функции это не тот this о котором ты подумал
}
}
};
var game=new Game(800,600);
image=new HImage('http://facebookcovers.piz18.com/wp-content/uploads/2012/04/Audi-R8-Super-Car.jpg');
image.draw(game,200,200);