CL3D.Renderer.prototype.postInit =function(){
    var vs_shader_3ddrawing_coloronly =  ""+
    "#ifdef GL_ES                           \n"+
    "precision highp float;                     \n"+
    "#endif                                 \n"+
    "uniform mat4 worldviewproj;                "+
    "attribute vec4 vPosition;                  "+
    "attribute vec4 vNormal;                    "+
    "void main()                                "+
    "{                                      "+
    "   gl_Position = worldviewproj * vPosition;"+
    "}";
    this.Program3DDrawingColorOnly = this.createMaterialTypeInternal(vs_shader_3ddrawing_coloronly, this.fs_shader_simplecolor);
}
CL3D.Renderer.prototype.draw3dline(x1, y1, z1, x2, y2, z2, color, blend){

    if (this.width == 0 || this.height == 0) {
        return
    }
    var m = true;
    if (blend == false) {
        m = false
    }

    var d = this.gl;
    d.enableVertexAttribArray(0);
    d.disableVertexAttribArray(1);
    d.disableVertexAttribArray(2);
    d.disableVertexAttribArray(3);
    d.disableVertexAttribArray(4);

    var g = new WebGLFloatArray( 6 );
    var k = new WebGLUnsignedShortArray(2);
    var i = 2;

    g[0] = x1;
    g[1] = y1;
    g[2] = z1;
    g[3] = x2;
    g[4] = y2;
    g[5] = z2;

    k[0] = 0;
    k[1] = 1;

    var f = d.createBuffer();
    d.bindBuffer(d.ARRAY_BUFFER, f);
    d.bufferData(d.ARRAY_BUFFER, g, d.STATIC_DRAW);
    d.vertexAttribPointer(0, 3, d.FLOAT, false, 0, 0);
    var c = d.createBuffer();
    d.bindBuffer(d.ELEMENT_ARRAY_BUFFER, c);
    d.bufferData(d.ELEMENT_ARRAY_BUFFER, k, d.STATIC_DRAW);
    this.currentGLProgram = this.Program3DDrawingColorOnly ;
    d.useProgram(this.currentGLProgram);
    d.uniform4f(d.getUniformLocation(this.currentGLProgram, "vColor"), CL3D.getRed(color) / 255, CL3D.getGreen(color) / 255, CL3D.getBlue(color) / 255, m ? (CL3D.getAlpha(color) / 255) : 1);
    d.depthMask(false);
    d.disable(d.DEPTH_TEST);
    if (!m) {
        d.disable(d.BLEND)
    } else {
        d.enable(d.BLEND);
        d.blendFunc(d.SRC_ALPHA, d.ONE_MINUS_SRC_ALPHA)
    }
    d.drawElements(d.LINES, i, d.UNSIGNED_SHORT, 0);
    d.deleteBuffer(f);
    d.deleteBuffer(c)
}