I am facing an issue while trying to showcase images on all faces of a polyhedron using three.js r71. I am creating the geometry by loading a JSON file containing the necessary data. Additionally, I have placed a plane beneath the polyhedron. However, upon execution, I encounter an error and I seek assistance in understanding its meaning or identifying any mistakes in my approach. Here is the error message that appears in the JavaScript console:
[.WebGLRenderingContext-0888D200]GL ERROR :GL_INVALID_OPERATION : glDrawElements: attempt to access out of range vertices in attribute 1
WebGL: too many errors, no more errors will be reported to the console for this context.
Below is the relevant JavaScript code snippet:
var four;
var meshFour;
var scene = new THREE.Scene();
function init() {
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
var renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0));
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMapEnabled = true;
var planeGeometry = new THREE.PlaneGeometry(60, 40, 1, 1);
var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff});
var plane = new THREE.Mesh(planeGeometry, planeMaterial);
plane.receiveShadow = true;
plane.rotation.x = -0.5 * Math.PI;
plane.position.x = 0;
plane.position.y = 0;
plane.position.z = 0;
//LOADING GEOMETRY
var loaderFour = new THREE.JSONLoader();
var materialsArray = [];
materialsArray.push(new THREE.MeshBasicMaterial( { map: THREE.ImageUtils.loadTexture("./resources/images/IPT.PNG")}));
materialsArray.push(new THREE.MeshBasicMaterial( { map: THREE.ImageUtils.loadTexture("./resources/images/Alerts.png")}));
materialsArray.push(new THREE.MeshBasicMaterial( { map: THREE.ImageUtils.loadTexture("./resources/images/action-item-tracking.png")}));
materialsArray.push(new THREE.MeshBasicMaterial( { map: THREE.ImageUtils.loadTexture("./resources/images/admin.png"}));
for(var i = 0; i <= 3; i++) {
materialsArray[i].map.minFilter = THREE.LinearFilter;
}
loaderFour.load("./resources/json/tetrahedron-try.json", function (model) {
var materialFour = new THREE.MeshFaceMaterial(materialsArray);
four = new THREE.Mesh(model, materialFour);//issue according to three.js
four.translateY(1);
four.scale = new THREE.Vector3(3, 3, 3);
meshFour = THREE.SceneUtils.createMultiMaterialObject(four, materialFour);
scene.add(four);
});
camera.position.x = 20;
camera.position.y = 20;
camera.position.z = 20;
camera.lookAt(new THREE.Vector3(0, 0, 0));
var spotLight = new THREE.SpotLight(0xffffff);
spotLight.position.set(-40, 60, 10);
spotLight.castShadow = true;
scene.add(spotLight);
scene.add(plane);
document.getElementById("WebGL-output").appendChild(renderer.domElement);
render();
function render() {
requestAnimationFrame(render);
renderer.render(scene, camera);
}
}
window.onload = init();
The contents of the JSON file used for defining the shape are displayed below:
{
"metadata": {
"type": "Geometry",
"vertices": 4,
"uvs": 1,
"faces": 4,
"generator": "io_three",
"version": 3,
"normals": 4
},
"uvs": [[0.250046,0.433025,0.749954,0.433025,0.5,0.865958,0.999907,0.865957,9.3e-05,0.865957,0.5,9.3e-05]],
"faces": [40,0,1,2,0,1,2,0,1,2,40,3,2,1,3,2,1,3,2,1,40,3,0,2,4,0,2,3,0,2,40,3,1,0,5,1,0,3,1,0],
"normals": [-0.471389,-0.333323,0.816492,-0.471389,-0.333323,-0.816492,0.942808,-0.333323,0,0,1,0],
"vertices": [-2.42416,0,4.19877,-2.42416,-0,-4.19877,4.84832,0,-0,-0,6.85655,-0],
"name": "Tetrahedron.001Geometry.3"
}