Mesh Generation with loaders

Brabbit_640 · November 11, 2018, 7:38am

Hi,
When a model is loaded with any loader, (PLYLoader.js, GLTFLoader.js, etc…) is there a way to differentiate between each object in the model?
For example, what steps should I follow to make a three.js app, where I can change the color of each dolphin using dat.gui.js in this example?
Thank you very much

prisoner849 · November 11, 2018, 10:24am

Hi!

AFAIK, there is no easy way to split dolphins in Three.js.
You have to find/develop/research your own algorithm. Or, maybe it’s possible to loat PLY-file into a modelling software, split it there and export back as PLY or another format. (I’m not an expert in it, it’s just a thought).

As you can see, THREE.PLYLoader() loads a single geometry:

github.com

mrdoob/three.js/blob/8409f9f58bab55a3ebb71bfb051d1ba926bae569/examples/webgl_loader_ply.html#L97


				plane.rotation.x = - Math.PI / 2;
				plane.position.y = - 0.5;
				scene.add( plane );


				plane.receiveShadow = true;




				// PLY file


				var loader = new THREE.PLYLoader();
				loader.load( './models/ply/ascii/dolphins.ply', function ( geometry ) {


					geometry.computeVertexNormals();


					var material = new THREE.MeshStandardMaterial( { color: 0x0055ff, flatShading: true } );
					var mesh = new THREE.Mesh( geometry, material );


					mesh.position.y = - 0.2;
					mesh.position.z = 0.3;
					mesh.rotation.x = - Math.PI / 2;
					mesh.scale.multiplyScalar( 0.001 );

Brabbit_640 · November 11, 2018, 10:29am

Alright. Thanks for clarification. I think the best way is to split the file as you mentioned.

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Mesh Generation with loaders

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