Dmitry87

Thanks. All work great. I just din't understand part with. args || arguments; and obj || window Is "||" logical or? What it does in those parts?

Hi,I'm writing some demos on JavaScript and get into some problems that can't understand how it works.I create a constructor function and define it variables and functions.But in InitBuffer function I'm calling onload image function and I'd like to be able to use this. variables but not what I did below. I create new variables image and sampTexture. Maybe I should pass that parameters in this onload function. But wasn't able to do that. function window(objectsSource){ this.xmlsource=objectsSource; this.indexbuffer = null; this.texelbuffer = null; this.initbuffer = InitBuffer; function InitBuffer(){ var texels = getTexelsFromXML(this.xmlsource); this.texelbuffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, this.texelbuffer); gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(texels), gl.STATIC_DRAW); this.texelbuffer.itemSize = texels.itemSize; this.texelbuffer.nItems = texels.nItems; gl.vertexAttribPointer(shaderProgram.vertexTextureAttribute, this.texelbuffer.itemSize, gl.FLOAT, false, 0, 0); this.texelbuffer.imageArray = gl.createTexture(); sampTexture = this.texelbuffer.imageArray; this.texelbuffer.imageArray.image = new Image(); image = this.texelbuffer.imageArray.image; this.texelbuffer.imageArray.image.onload = function(){ try{ gl.bindTexture(gl.TEXTURE_2D, sampTexture); gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_NEAREST); gl.generateMipmap(gl.TEXTURE_2D); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); } catch(e){ alert("!!!"); } image.src=texels.imageArray[0];