Develop Reference

How to change Shader color in ThreeJS

I'm new to Three Js and i do not know how to change the color of my material when i press a button on the html page.
Do you have any suggestion? I'll attach here the code
here is how i declare my material:
var color2= new THREE.Color(0xff0000)
var customMaterial = new THREE.ShaderMaterial(
{
uniforms: {
p: { type: "f", value: 2 },
glowColor: { type: "c", value: color2 },
},
vertexShader: $('#vertexShader').text,
fragmentShader: $('#fragmentShader').text,
side: THREE.DoubleSide,
blending: THREE.AdditiveBlending,
transparent: true,
depthWrite: false
});
here is how i update my color:
function render() {
renderer.render(scene, camera);
document.getElementById("colore").onclick= function(){
console.log("prova caramella");
var customMaterial = new THREE.ShaderMaterial(
{
uniforms: {
p: { type: "f", value: 2 },
glowColor: { type: "c", value: new THREE.Color(0x00ff00) },
},
vertexShader: $('#vertexShader').text,
fragmentShader: $('#fragmentShader').text,
side: THREE.DoubleSide,
blending: THREE.AdditiveBlending,
transparent: true,
depthWrite: false
});
customMaterial.needsUpdate = true
}
and lastly this is how i link the material to my 3d model:
function petali2(){
var loaderpetali = new THREE.ColladaLoader();
loaderpetali.load('petali3.dae', function (collada) {
petali = collada.scene;
petali.traverse( function ( child ) {
if (child instanceof THREE.Mesh) {
console.log(child);
child.material = customMaterial;
}
} );
petali.scale.x = 2;
petali.scale.y = 2;
petali.scale.z = 2;
//flower = dae;
scene.add(petali);
});
}

When updating the color, it's sufficient to do this:
customMaterial.uniforms.glowColor.value.set( 0x00ff00 );
There is no need to create a new material.
Besides, when using a latest version of three.js, it's not necessary to define the type for a uniform. The type is automatically derived from the compiled shader. On app level, it's sufficient to do.
uniforms: {
p: { value: 2 },
glowColor: { value: new THREE.Color(0x00ff00) },
},

How can I create a custom THREE.MeshStandardMaterial?

I'm looking to create a material with three.js identical to MeshStandardMaterial.
I want to do this because I need all of its features except with small changes to the GLSL code.
I attempted to recreate MeshStandardMaterial using ShaderMaterial.
WAFFLE.StandardMaterial = function( parameters ) {
parameters.uniforms = THREE.UniformsUtils.merge( [
THREE.UniformsLib.common,
THREE.UniformsLib.aomap,
THREE.UniformsLib.lightmap,
THREE.UniformsLib.emissivemap,
THREE.UniformsLib.bumpmap,
THREE.UniformsLib.normalmap,
THREE.UniformsLib.displacementmap,
THREE.UniformsLib.roughnessmap,
THREE.UniformsLib.metalnessmap,
THREE.UniformsLib.fog,
THREE.UniformsLib.lights,
{
emissive: { value: new THREE.Color( 0x000000 ) },
roughness: { value: 0.5 },
metalness: { value: 0 },
envMapIntensity: { value: 1 } // temporary
}
] );
parameters.vertexShader = THREE.ShaderChunk.meshphysical_vert;
parameters.fragmentShader = THREE.ShaderChunk.meshphysical_frag;
THREE.ShaderMaterial.call( this, parameters );
}
WAFFLE.StandardMaterial.prototype = Object.create( THREE.ShaderMaterial.prototype );
WAFFLE.StandardMaterial.prototype.constructor = WAFFLE.StandardMaterial;
I haven't been successful thus far.
How can I recreate MeshStandardMaterial?

Make a Global Scope of a mesh using Three.js

I am making my first steps coding with JavaScript and playing with Three.js too.
In my code I made this function:
var loader = new THREE.BinaryLoader();
loader.load( "sources/obj/mmlogo/mm_logo.js", function ( geometry ) {
uniforms = {
color: {
type: "c",
value: new THREE.Color(0x000000),
},
envMap: {
type: "t",
value: reflectionCube
},
fresnelBias: {
type: "f",
value: 0.1
},
fresnelScale: {
type: "f",
value: 1.0
},
fresnelPower: {
type: 'f',
value: 2.0
}
};
material = new THREE.ShaderMaterial( {
uniforms : uniforms,
vertexShader : vertexShader,
fragmentShader : fragmentShader,
wireframe: false,
side: THREE.DoubleSide,
});
monogram = new THREE.Mesh( geometry, material );
monogram.scale.set( 1, 1, 1 );
monogram.position.z = -9;
scene.add( monogram );
});
and then I made this render function:
function render() {
frame += 0.1/3;
monogram.scale.z += Math.sin(frame)/600;
TWEEN.update();
targetX = mouseX * .0005;
targetY = mouseY * .0005;
if ( monogram ) {
monogram.rotation.y += 0.05 * ( targetX - monogram.rotation.y );
monogram.rotation.x += 0.05 * ( targetY - monogram.rotation.x );
}
renderer.render( scene, camera );
}
I can see everything and everything works ok. But my console says that there is an error: Uncaught ReferenceError: monogram is not defined.
I think that I have to make a Global Scope of monogram. So I wrote var before monogram and it doesnt work, then I wrote
monogram = new THREE.Mesh( geometry, material );
monogram.scale.set( 1, 1, 1 );
monogram.position.z = -9;
scene.add( monogram );
outside my function and it doesnt work.
Do you have some suggestion? My app works, even if the console says that there is n error, I think that is better if my console says that everything is ok.

Three.js - include mesh data in code

I have this Three.js code with JSON loader loading mesh from file /models/mountain.json:
var Three = new function () {
this.scene = new THREE.Scene()
this.camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 1000)
this.camera.position.set(20, 52, 20);
this.camera.rotation.order = 'YXZ';
this.camera.rotation.y = -Math.PI / 4;
this.camera.rotation.x = Math.atan(-1 / Math.sqrt(2));
this.camera.scale.addScalar(1);
this.renderer = new THREE.WebGLRenderer()
this.renderer.setSize(window.innerWidth, window.innerHeight);
var ground = new THREE.Mesh(
new THREE.PlaneBufferGeometry(436, 624),
new THREE.MeshLambertMaterial({color: '#808080'}));
ground.rotation.x = -Math.PI / 2; //-90 degrees around the x axis
this.scene.add(ground);
var light = new THREE.PointLight(0xFFFFDD);
light.position.set(-1000, 1000, 1000);
this.scene.add(light);
var loader = new THREE.JSONLoader();
this.loadMountain = function (x, y) {
loader.load('/models/mountain.json', Three.getGeomHandler('#808080', x, y, 1))
}
this.loadFields = function () {
for (var i=0;i<4000;i++) {
Three.loadMountain(x, y)
}
}
this.getGeomHandler = function (color, x, y, scale) {
return function (geometry) {
var mesh = new THREE.Mesh(geometry, new THREE.MeshLambertMaterial({color: color}));
mesh.scale.set(scale, scale, scale);
mesh.position.set(x, 0, y);
Three.scene.add(mesh);
};
}
this.init = function () {
$('body').append(Three.renderer.domElement);
Three.loadFields()
Three.render();
}
this.render = function () {
requestAnimationFrame(Three.render);
Three.renderer.render(Three.scene, Three.camera);
};
}
$(document).ready(function () {
Three.init();
});
and this is /models/mountain.json content:
{
"metadata": {
"formatVersion" : 3.1,
"generatedBy" : "Blender 2.7 Exporter",
"vertices" : 39,
"faces" : 62,
"normals" : 36,
"colors" : 0,
"uvs" : [],
"materials" : 1,
"morphTargets" : 0,
"bones" : 0
},
"scale" : 1.000000,
"vertices" : [2.47941e-07,-1.13504e-07,-2.59668,-2.41031,-6.2081e-08,-1.42025,-2.2107,4.55942e-08,1.04307,2.16045,1.84802,0.183901,-0.427399,1.11956e-07,2.56126,1.23588,9.98242e-08,2.28371,2.50387,4.55942e-08,1.04307,2.58781,9.37308e-09,0.214431,2.17385,-0.0483214,-1.42025,1.40026,-0.0483214,-1.74566,1.50645e-07,2.13114,-1.9421,-0.6306,2.13114,-1.52968,-1.04238,2.48498,-1.06715,-1.23632,3,-0.856474,-1.5574,2.62306,-0.476759,-1.68478,2.74775,0.160378,-1.20001,3,0.780135,-1.14654,3,1.41015,-0.31966,3,1.91562,0.31966,2.48498,1.46763,0.92434,3,1.70803,0.754272,2.73835,0.751422,1.90443,2.61032,0.780134,1.52632,2.76301,0.160377,1.78144,2.69402,-0.47676,1.9564,3,-1.06223,0.807846,2.13114,-1.68984,1.32727,3.09213,-1.10549,1.13568,1.38919,-1.21096,1.98255,0.969716,-1.07503,0.529022,2.81989,0.43993,0.969891,3.32801,-1.43745,-0.39848,2.2361,-1.12285,-1.00579,1.31316,2.27174,-0.789081,1.31316,2.34614,0.888122,0.684588,2.17543,0.568656,2.07869,1.615,2.13863,1.49103,1.32889,2.52981,0.924307,0.978923],
"faces" : [34,0,11,10,0,0,1,2,34,1,13,12,0,3,4,5,34,0,12,11,0,0,5,1,34,0,1,12,0,0,3,5,34,38,3,37,0,6,7,8,34,9,31,28,0,9,10,11,34,0,10,26,0,0,2,12,34,9,26,31,0,9,12,10,34,9,0,26,0,9,0,12,35,18,17,33,34,0,13,14,15,16,35,37,3,23,22,0,8,7,17,18,34,29,27,25,0,19,20,21,34,28,31,27,0,11,10,20,34,29,28,27,0,19,11,20,34,12,19,20,0,5,22,23,34,5,6,20,0,24,25,23,34,6,38,37,0,25,6,8,34,37,22,21,0,8,18,26,34,30,27,31,0,26,20,10,34,6,37,20,0,25,8,23,34,30,31,32,0,26,10,27,34,37,21,20,0,8,26,23,34,30,32,26,0,26,27,12,34,21,30,20,0,26,26,23,34,11,12,20,0,1,5,23,34,26,10,11,0,12,2,1,34,30,11,20,0,26,1,23,34,30,26,11,0,26,12,1,34,20,35,5,0,23,28,24,34,20,19,36,0,23,22,28,34,20,36,35,0,23,28,28,35,6,7,3,38,0,25,29,7,6,34,7,23,3,0,29,17,7,34,29,25,24,0,19,21,30,34,7,24,23,0,29,30,17,34,7,8,29,0,29,31,19,34,7,29,24,0,29,19,30,34,18,36,19,0,13,28,22,34,4,5,35,0,32,24,28,34,18,35,36,0,13,28,28,34,18,34,4,0,13,16,32,34,18,4,35,0,13,32,28,35,13,14,15,16,0,4,33,33,34,34,30,25,27,0,26,21,20,34,23,24,25,0,17,30,21,34,21,22,23,0,26,18,17,34,30,21,25,0,26,26,21,34,21,23,25,0,26,17,21,35,8,9,28,29,0,31,9,11,19,34,26,32,31,0,12,27,10,34,2,16,15,0,35,34,33,34,14,13,1,0,33,4,3,34,14,2,15,0,33,35,33,34,14,1,2,0,33,3,35,34,2,17,16,0,35,14,34,34,4,34,33,0,32,16,15,34,2,33,17,0,35,15,14,34,2,4,33,0,35,32,15,34,16,12,13,0,34,5,4,34,18,19,12,0,13,22,5,34,16,17,18,0,34,14,13,34,16,18,12,0,34,13,5],
"uvs" : [],
"normals" : [0.094028,0.298624,-0.949705,-0.162755,0.939238,-0.302133,0.228248,0.832942,-0.504044,-0.822016,0.351848,-0.447707,-0.253456,0.911466,-0.323923,-0.004059,0.913785,-0.40614,0.788598,0.576983,0.21247,0.952086,0.29432,-0.082797,0.625996,0.719138,0.301553,0.474441,0.29017,-0.83105,0.255501,0.796655,-0.547746,0.441328,0.166265,-0.881802,0.221656,0.483047,-0.847041,0.192999,0.761406,0.618824,-0.352977,0.778008,0.5197,-0.653584,0.252663,0.713401,-0.29136,0.293313,0.91052,0.688314,0.722556,0.063967,0.612629,0.761834,0.210364,0.718711,0.280313,-0.63625,0.370495,0.893033,-0.255287,0.629627,0.578692,-0.518326,0.229896,0.680258,0.695944,-0.064241,0.589251,0.805353,0.205145,0.606586,0.768059,0.734519,0.631458,0.24839,0.211341,0.910367,0.355693,-0.135533,0.925748,-0.352916,-0.03061,0.231269,0.972381,0.975982,0.184362,-0.11594,0.694266,0.717338,0.058412,0.712027,0.350871,-0.608173,-0.201483,0.259865,0.944365,-0.820185,0.572069,-0.001556,-0.322733,0.944334,0.063509,-0.922117,0.223151,0.315958],
"skinIndices" : [],
"skinWeights" : [],
"morphTargets" : [],
"bones" : [],
"animations" : [],
"colors" : [],
"materials" : [
{
"DbgColor": 15658734,
"DbgIndex": 0,
"DbgName": "default",
"vertexColors": false
}
]
}
Is it possible to use this content in code as a variable and add it to scane?

Here is the pattern to follow if you want to load a model by parsing a JSON data structure.
Modify your mountain.json file and give your data structure a name.
var mountain = {
"metadata": {
"formatVersion" : 3.1,
"generatedBy" : "Blender 2.7 Exporter",
... etc ...
}
Include the following code in your source:
<script src="mountain.js"></script>
Now you can load your model like so:
var loader = new THREE.JSONLoader();
var model = loader.parse( mountain );
mesh = new THREE.Mesh( model.geometry, model.materials[ 0 ] );
scene.add( mesh );
three.js r.70

three.js; Cannot read property 'position' of undefined and don't know why

I'm gonna make my SUN!!!!!!!!!!!!!!!!! SUNGOD!!! urg---!
..sorry.
It doesn't work as well.
Error message shown on console and it said;
// Uncaught TypeError: Cannot read property 'position' of undefined;
Here is source
// Constructing * The Solar *
var shape = new THREE.BufferGeometry();
shape.addAttribute('position', new THREE.Float32Attribute(6,3));
// console shows problem is here but I can't find any
shape.addAttribute('textureOrder', new THREE.Int8Attribute(6,1));
for(var i=0; i<6; i++) {
shape.attribute.position.setXYZ(i, 0, 0, 0);
shape.attribute.textureOrder.setX(i, i);
};
var d = new Date();
var mater = new THREE.ShaderMaterial({
uniforms: {
time: { type: 'f', value: d.getTime() },
tsun_core: { type: 't', value: loadTexture('./sun_core.png') },
tsun_innerglow: { type: 't', value: loadTexture('./sun_innerglow.png') },
tsun_starlight: { type: 't', value: loadTexture('./sun_starlight.png') },
tsun_outerglow: { type: 't', value: loadTexture('./sun_outerglow.png') },
tsun_shortjetlight: { type: 't', value: loadTexture('./sun_shortjetlight.png') },
tsun_longjetlight: { type: 't', value: loadTexture('./sun_longjetlight.png') }
},
vertexShader: document.getElementById('vs-sun').textContent,
fragmentShader: document.getElementById('fs-sun').textContent
});
mater.depthTest = false;
mater.vertexColor = true;
mater.transparent = true;
mater.blending = THREE.AdditiveBlending;
sun = new THREE.ParticleSystem(shape, mater);
scene.add(sun);
My goal is, change gl_FragColor opacity by uniform time in fragment shader so my sun(?) to be more dynamic...
My opinion, cause of problem be somewhere above source. Please guide me..

Calling the addAttribute method on a THREE.BufferGeometry instance creates properties under the attributes property, not attribute.
Replaces these lines
shape.attribute.position.setXYZ(i, 0, 0, 0);
shape.attribute.textureOrder.setX(i, i);
With the following lines
shape.attributes.position.setXYZ(i, 0, 0, 0);
shape.attributes.textureOrder.setX(i, i);