function loadObjXml(gl,url)
{
    if(gl.obj == undefined) gl.obj = new Object();
    var xmlChara = new Object();
    xmlChara = parseObj(url);
    for (var name in xmlChara)
	{
            gl.obj[name] = makeXmlObj(gl, xmlChara[name]);
            gl.obj[name].texture = loadImageTexture(gl, xmlChara[name].image);
	}
}

function PutSpriteF(ctx, x, y, scale, glObj)
{
    PutSpriteA(ctx,x,y,10, scale, 0, glObj);
}


function PutSpriteA(ctx, x, y, z, scale, angle,  glObj)
{
    // setup VBOs
    ctx.enableVertexAttribArray(0);
    ctx.enableVertexAttribArray(1);
    ctx.enableVertexAttribArray(2);
				
    ctx.bindBuffer(ctx.ARRAY_BUFFER, glObj.vertexObject);
    ctx.vertexAttribPointer(2, 3, ctx.FLOAT, false, 0, 0);
    ctx.bindBuffer(ctx.ARRAY_BUFFER, glObj.normalObject);
    ctx.vertexAttribPointer(0, 3, ctx.FLOAT, false, 0, 0);
    
    ctx.bindBuffer(ctx.ARRAY_BUFFER, glObj.texCoordObject);
    ctx.vertexAttribPointer(1, 2, ctx.FLOAT, false, 0, 0);
				
    ctx.bindBuffer(ctx.ELEMENT_ARRAY_BUFFER, glObj.indexObject);

    // generate the model-view matrix
    var mvMatrix = new J3DIMatrix4();
    mvMatrix.translate( x, y, z);
    mvMatrix.scale(scale, scale, scale);
    mvMatrix.rotate(angle, 0, 0, 1);
    
    // construct the normal matrix from the model-view matrix
    var normalMatrix = new J3DIMatrix4(mvMatrix);
    normalMatrix.invert();
    normalMatrix.transpose();
    normalMatrix.setUniform(ctx, ctx.getUniformLocation(ctx.program, "u_normalMatrix"), false);
    
    // construct the model-view * projection matrix
    var mvpMatrix = new J3DIMatrix4(ctx.perspectiveMatrix);
    mvpMatrix.multiply(mvMatrix);
     mvpMatrix.setUniform(ctx, ctx.getUniformLocation(ctx.program, "u_modelViewProjMatrix"), false);

    
    ctx.bindTexture(ctx.TEXTURE_2D, glObj.texture);
    ctx.drawElements(ctx.TRIANGLES, glObj.numIndices, ctx.UNSIGNED_SHORT, 0);
 
}



// matrix version
function PutSpriteV(ctx, x, y, z, scale, matrix, glObj)
{
    // setup VBOs
    ctx.enableVertexAttribArray(0);
    ctx.enableVertexAttribArray(1);
    ctx.enableVertexAttribArray(2);
		
    ctx.bindBuffer(ctx.ARRAY_BUFFER, glObj.vertexObject);
    ctx.vertexAttribPointer(2, 3, ctx.FLOAT, false, 0, 0);
    ctx.bindBuffer(ctx.ARRAY_BUFFER, glObj.normalObject);
    ctx.vertexAttribPointer(0, 3, ctx.FLOAT, false, 0, 0);
    
    ctx.bindBuffer(ctx.ARRAY_BUFFER, glObj.texCoordObject);
    ctx.vertexAttribPointer(1, 2, ctx.FLOAT, false, 0, 0);
				
    ctx.bindBuffer(ctx.ELEMENT_ARRAY_BUFFER, glObj.indexObject);

    // generate the model-view matrix
    var mvMatrix = new J3DIMatrix4();
    mvMatrix.translate( x, y, z);
    mvMatrix.scale(scale, scale, scale);
    mvMatrix.multiply(matrix);
    
    // construct the normal matrix from the model-view matrix
    var normalMatrix = new J3DIMatrix4(mvMatrix);
    normalMatrix.invert();
    normalMatrix.transpose();
    normalMatrix.setUniform(ctx, ctx.getUniformLocation(ctx.program, "u_normalMatrix"), false);
    
    // construct the model-view * projection matrix
    var mvpMatrix = new J3DIMatrix4(ctx.perspectiveMatrix);
    mvpMatrix.multiply(mvMatrix);
     mvpMatrix.setUniform(ctx, ctx.getUniformLocation(ctx.program, "u_modelViewProjMatrix"), false);

    
    ctx.bindTexture(ctx.TEXTURE_2D, glObj.texture);
    ctx.drawElements(ctx.TRIANGLES, glObj.numIndices, ctx.UNSIGNED_SHORT, 0);
 
}