Custom geometry using vertex arrays not rendering

[Siddharth Vaghela]

Hi,

This is what I am trying out:

//******************************************************************

/*global variables*/

var circle_tri_fan_vert;

var circle_tri_fan_ind;

var circle_tri_fan_colors;

function hardCodedTriangles() {

circle_tri_fan_vert = new Array();

circle_tri_fan_ind = new Array();

circle_tri_fan_colors = new Array();

//first vertex

circle_tri_fan_ind.push(0);

circle_tri_fan_vert.push(1);

circle_tri_fan_vert.push(0);

circle_tri_fan_vert.push(0);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(1);

//second vertex

circle_tri_fan_ind.push(1);

circle_tri_fan_vert.push(-1);

circle_tri_fan_vert.push(0);

circle_tri_fan_vert.push(0);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(1);

//third vertex

circle_tri_fan_ind.push(2);

circle_tri_fan_vert.push(0);

circle_tri_fan_vert.push(1);

circle_tri_fan_vert.push(0);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(0.5);

circle_tri_fan_colors.push(1);

}

hardCodedTriangles();

/*Create the Scenegraph for the gauge*/

SceneJS.createScene( {

id: "gauge",

canvasId: "viewport",

loggingElementId: "theLoggingDiv",

nodes: [

        {

            type: "lookAt",

            id: "my-lookat",

            eye: { z: 100 },

            look: { z: 0 },

            nodes: [

{

type: "scale",

id: "root",

x: 1,

y: 1,

z: 0,

nodes: [

{

type: "geometry",

id: "gauge_bg_circle",

primitive: "triangles",

positions: circle_tri_fan_vert,

indices: circle_tri_fan_ind,

colors: circle_tri_fan_colors

}

]

}

            ]

}

    ]

});

var canvas = document.getElementById("viewport");

var scene = SceneJS.scene("gauge");

scene.start();

//****************************************************************************

Now, SceneJS loads everything properly but does not render anything! Only one black square appears in the canvas.

can anyone help?

regards,

Siddharth