|
|
@@ -1,7 +1,7 @@
|
|
|
<!DOCTYPE html>
|
|
|
<html lang="en">
|
|
|
<head>
|
|
|
- <title>three.js webgl - instancing test</title>
|
|
|
+ <title>three.js webgl - instancing test (meshes)</title>
|
|
|
<meta charset="utf-8">
|
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
|
|
<style>
|
|
|
@@ -27,10 +27,6 @@
|
|
|
color: #ffffff;
|
|
|
}
|
|
|
|
|
|
- #oldie a {
|
|
|
- color: #da0;
|
|
|
- }
|
|
|
-
|
|
|
#notSupported {
|
|
|
width: 50%;
|
|
|
margin: auto;
|
|
|
@@ -44,7 +40,7 @@
|
|
|
|
|
|
<div id="container"></div>
|
|
|
<div id="info">
|
|
|
- <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - instancing demo
|
|
|
+ <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - instancing test (meshes)
|
|
|
<div id="notSupported" style="display:none">Sorry your graphics card + browser does not support hardware instancing</div>
|
|
|
</div>
|
|
|
|
|
|
@@ -61,6 +57,8 @@
|
|
|
attribute vec4 instanceQuaternion;
|
|
|
attribute vec3 instanceScale;
|
|
|
|
|
|
+ varying vec3 vColor;
|
|
|
+
|
|
|
vec3 applyTRS( vec3 position, vec3 translation, vec4 quaternion, vec3 scale ) {
|
|
|
|
|
|
position *= scale;
|
|
|
@@ -69,9 +67,6 @@
|
|
|
|
|
|
}
|
|
|
|
|
|
- attribute vec3 color;
|
|
|
- varying vec3 vColor;
|
|
|
-
|
|
|
void main(){
|
|
|
|
|
|
vColor = color;
|
|
|
@@ -99,7 +94,7 @@
|
|
|
|
|
|
<script>
|
|
|
|
|
|
- if ( !Detector.webgl ) Detector.addGetWebGLMessage();
|
|
|
+ if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
|
|
|
|
|
|
var container, stats;
|
|
|
|
|
|
@@ -120,11 +115,9 @@
|
|
|
controls = new THREE.TrackballControls( camera );
|
|
|
|
|
|
scene = new THREE.Scene();
|
|
|
- scene.background = new THREE.Color( 0x101010 );
|
|
|
|
|
|
//
|
|
|
|
|
|
- // var geometry = new THREE.BoxBufferGeometry( 0.01, 0.01, 0.01 );
|
|
|
var geometry = new THREE.IcosahedronBufferGeometry( 0.1, 1 );
|
|
|
|
|
|
var colors = [];
|
|
|
@@ -139,20 +132,19 @@
|
|
|
|
|
|
var material = new THREE.MeshBasicMaterial( { color: 0xff0000, vertexColors: THREE.VertexColors } );
|
|
|
|
|
|
- var mesh = new THREE.Mesh( geometry, material );
|
|
|
- // scene.add( mesh );
|
|
|
-
|
|
|
//
|
|
|
|
|
|
- var INSTANCE_COUNT = 100;
|
|
|
-
|
|
|
- var geometry2 = new THREE.InstancedBufferGeometry().copy( geometry );
|
|
|
+ var instances = 100;
|
|
|
|
|
|
var instancePositions = [];
|
|
|
var instanceQuaternions = [];
|
|
|
var instanceScales = [];
|
|
|
|
|
|
- for ( var i = 0; i < INSTANCE_COUNT; i ++ ) {
|
|
|
+ // we create for each mesh a counterpart in our instanced geometry data
|
|
|
+
|
|
|
+ for ( var i = 0; i < instances; i ++ ) {
|
|
|
+
|
|
|
+ // the red meshes are drawn with separate draw calls
|
|
|
|
|
|
var mesh = new THREE.Mesh( geometry, material );
|
|
|
scene.add( mesh );
|
|
|
@@ -168,47 +160,60 @@
|
|
|
|
|
|
scale.set( Math.random() * 2, Math.random() * 2, Math.random() * 2 );
|
|
|
|
|
|
+ // instanced attribute data
|
|
|
+
|
|
|
instancePositions.push( position.x, position.y, position.z );
|
|
|
instanceQuaternions.push( quaternion.x, quaternion.y, quaternion.z, quaternion.w );
|
|
|
instanceScales.push( scale.x, scale.y, scale.z );
|
|
|
|
|
|
}
|
|
|
|
|
|
- var attribute = new THREE.InstancedBufferAttribute( new Float32Array( instancePositions ), 3 );
|
|
|
- geometry2.addAttribute( 'instancePosition', attribute );
|
|
|
+ var instancedGeometry = new THREE.InstancedBufferGeometry();
|
|
|
+ instancedGeometry.attributes.position = geometry.attributes.position;
|
|
|
+ instancedGeometry.attributes.color = geometry.attributes.color;
|
|
|
|
|
|
- var attribute = new THREE.InstancedBufferAttribute( new Float32Array( instanceQuaternions ), 4 );
|
|
|
- geometry2.addAttribute( 'instanceQuaternion', attribute );
|
|
|
+ instancedGeometry.addAttribute( 'instancePosition', new THREE.InstancedBufferAttribute( new Float32Array( instancePositions ), 3 ) );
|
|
|
+ instancedGeometry.addAttribute( 'instanceQuaternion', new THREE.InstancedBufferAttribute( new Float32Array( instanceQuaternions ), 4 ) );
|
|
|
+ instancedGeometry.addAttribute( 'instanceScale', new THREE.InstancedBufferAttribute( new Float32Array( instanceScales ), 3 ) );
|
|
|
|
|
|
- var attribute = new THREE.InstancedBufferAttribute( new Float32Array( instanceScales ), 3 );
|
|
|
- geometry2.addAttribute( 'instanceScale', attribute );
|
|
|
+ //
|
|
|
|
|
|
- var material = new THREE.ShaderMaterial( {
|
|
|
+ var shaderMaterial = new THREE.ShaderMaterial( {
|
|
|
|
|
|
uniforms: {},
|
|
|
vertexShader: document.getElementById( 'vertexShader' ).textContent,
|
|
|
- fragmentShader: document.getElementById( 'fragmentShader' ).textContent
|
|
|
+ fragmentShader: document.getElementById( 'fragmentShader' ).textContent,
|
|
|
+ vertexColors: true
|
|
|
|
|
|
} );
|
|
|
|
|
|
- var mesh2 = new THREE.Mesh( geometry2, material );
|
|
|
- mesh2.position.x = 0.1;
|
|
|
- scene.add( mesh2 );
|
|
|
+ // counterparts are drawn all at once with a single draw call (via instanced rendering)
|
|
|
+
|
|
|
+ var instancedMesh = new THREE.Mesh( instancedGeometry, shaderMaterial );
|
|
|
+ instancedMesh.position.x = 0.1;
|
|
|
+ scene.add( instancedMesh );
|
|
|
+
|
|
|
+ //
|
|
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
|
+ renderer.setPixelRatio( window.devicePixelRatio );
|
|
|
+ renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
+ container.appendChild( renderer.domElement );
|
|
|
|
|
|
if ( renderer.extensions.get( 'ANGLE_instanced_arrays' ) === false ) {
|
|
|
- document.getElementById( "notSupported" ).style.display = "";
|
|
|
+
|
|
|
+ document.getElementById( 'notSupported' ).style.display = '';
|
|
|
return;
|
|
|
+
|
|
|
}
|
|
|
|
|
|
- renderer.setPixelRatio( window.devicePixelRatio );
|
|
|
- renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
- container.appendChild( renderer.domElement );
|
|
|
+ //
|
|
|
|
|
|
stats = new Stats();
|
|
|
container.appendChild( stats.dom );
|
|
|
|
|
|
+ //
|
|
|
+
|
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
|
|
|
|
|
}
|
Mr.doob