Can I dispose a WebGLRenderTarget without losing its texture?

Questions
1

I’m trying to do some GPGPU in Three.js and the title pretty much says it all :slight_smile:

Here’s a short version of my code:

var geometry = new THREE.PlaneBufferGeometry();
var camera = new THREE.OrthographicCamera( 0, 1, 1, 0, -1000, 1000 );

export function shade2(inTex, fragmentShader) {
	var uniforms = { tex: { value: inTex } };

	var material = new THREE.ShaderMaterial( {
		uniforms: uniforms,
		vertexShader: vertexShader,
		fragmentShader: fragmentShader,
		side: THREE.DoubleSide
		} );
	var mesh = new THREE.Mesh( geometry, material );

	mesh.position.set(.5, .5, 0);

	var scene = new THREE.Scene();
	var renderTarget = new THREE.WebGLRenderTarget(inTex.width, inTex.height);

	scene.add( mesh );

	renderer.setRenderTarget(renderTarget);
	renderer.render(scene, camera);

	material.dispose();
	renderTarget.dispose();

	return renderTarget.texture;
}

Of course, the texture returned by shade2 is invalid because renderTarget.dispose(); has already disposed that texture.

TIA! :slight_smile:

2

Nope, that’s not possible. When calling renderTarget.dispose(), you delete the respective frame and render buffers which actually hold the texture’s data.

1 Like