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Examples: Simplify webgl2_rendertarget_texture2darray. #21520

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Mar 25, 2021
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Examples: Simplify webgl2_rendertarget_texture2darray. #21520

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52 changes: 12 additions & 40 deletions examples/webgl2_rendertarget_texture2darray.html
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Original file line number Diff line number Diff line change
Expand Up @@ -33,13 +33,12 @@

uniform sampler2DArray uTexture;
uniform int uDepth;
uniform float uSampleLeft;
uniform float uSampleWidth;
uniform float uIntensity;

void main()
{
float voxel = texture(uTexture, vec3( vUv, uDepth )).r;
gl_FragColor.r = (voxel - uSampleLeft) / uSampleWidth;
gl_FragColor.r = voxel * uIntensity;
}

</script>
Expand Down Expand Up @@ -87,8 +86,7 @@

<p>
This example shows how to render to an array of 2D texture.</br>
WebGL2 allows to render to specific "layers" in 3D texture and array of textures.</br>
You can use the mouse left click to change the intensity of the render target.
WebGL2 allows to render to specific "layers" in 3D texture and array of textures.
</p>

Scanned head data by
Expand All @@ -103,6 +101,7 @@

import Stats from './jsm/libs/stats.module.js';
import { unzipSync } from './jsm/libs/fflate.module.min.js';
import { GUI } from './jsm/libs/dat.gui.module.js';

import { WEBGL } from './jsm/WebGL.js';

Expand All @@ -118,8 +117,8 @@
depth: 109
};

const App = {
mousePrevious: new THREE.Vector2()
const params = {
intensity: 1
};

/** Post-processing objects */
Expand All @@ -139,8 +138,7 @@
uniforms: {
uTexture: { value: null },
uDepth: { value: 55 },
uSampleLeft: { value: 0 },
uSampleWidth: { value: 1.0 },
uIntensity: { value: 1.0 }
},
vertexShader: document.getElementById( 'vertex-postprocess' ).textContent.trim(),
fragmentShader: document.getElementById( 'fragment-postprocess' ).textContent.trim()
Expand Down Expand Up @@ -178,13 +176,16 @@
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );

renderer.domElement.addEventListener( 'mousedown', onMouseDown );

stats = new Stats();
container.appendChild( stats.dom );

window.addEventListener( 'resize', onWindowResize, false );

const gui = new GUI();

gui.add( params, 'intensity', 0, 1 ).step( 0.01 ).onChange( value => postProcessMaterial.uniforms.uIntensity.value = value );
gui.open();

// width 256, height 256, depth 109, 8-bit, zip archived raw data

new THREE.FileLoader()
Expand Down Expand Up @@ -222,35 +223,6 @@

}

function onMouseDown(e) {

renderer.domElement.addEventListener('mouseup', onMouseUp);
renderer.domElement.addEventListener('mousemove', onMouseMove);

App.mousePrevious.set(e.clientX, e.clientY);

}

function onMouseUp() {

renderer.domElement.removeEventListener('mousemove', onMouseMove);
renderer.domElement.removeEventListener('mouseup', onMouseUp);

}

function onMouseMove(e) {

const x = e.clientX;
const y = e.clientY;
const deltaX = ( x - App.mousePrevious.x ) * 0.001;
const deltaY = ( y - App.mousePrevious.y ) * 0.001;
postProcessMaterial.uniforms.uSampleLeft.value += deltaX;
postProcessMaterial.uniforms.uSampleWidth.value += deltaY;

App.mousePrevious.set( x, y );

}

function onWindowResize() {

camera.aspect = window.innerWidth / window.innerHeight;
Expand Down