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Terrain raycast example: cleanup #14719

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Aug 20, 2018
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Terrain raycast example: cleanup #14719

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52 changes: 27 additions & 25 deletions examples/webgl_geometry_terrain_raycast.html
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Original file line number Diff line number Diff line change
Expand Up @@ -44,12 +44,7 @@

<script>

if ( ! Detector.webgl ) {

Detector.addGetWebGLMessage();
document.getElementById( 'container' ).innerHTML = "";

}
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

var container, stats;

Expand All @@ -58,7 +53,7 @@
var mesh, texture;

var worldWidth = 256, worldDepth = 256,
worldHalfWidth = worldWidth / 2, worldHalfDepth = worldDepth / 2;
worldHalfWidth = worldWidth / 2, worldHalfDepth = worldDepth / 2;

var clock = new THREE.Clock();

Expand All @@ -73,21 +68,31 @@
function init() {

container = document.getElementById( 'container' );
container.innerHTML = "";

camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 20000 );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );

scene = new THREE.Scene();
scene.background = new THREE.Color( 0xbfd1e5 );

controls = new THREE.OrbitControls(camera);
controls.target.set( 0.0, 100.0, 0.0 );
controls.userPanSpeed = 100;
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 10, 20000 );

controls = new THREE.OrbitControls( camera, renderer.domElement );
controls.minDistance = 1000;
controls.maxDistance = 10000;
controls.maxPolarAngle = Math.PI / 2;

//

var data = generateHeight( worldWidth, worldDepth );

controls.target.y = data[ worldHalfWidth + worldHalfDepth * worldWidth ] + 500;
camera.position.y = controls.target.y + 2000;
camera.position.y = controls.target.y + 2000;
camera.position.x = 2000;
controls.update();

var geometry = new THREE.PlaneBufferGeometry( 7500, 7500, worldWidth - 1, worldDepth - 1 );
geometry.rotateX( - Math.PI / 2 );
Expand All @@ -100,7 +105,9 @@

}

geometry.computeFaceNormals();
geometry.computeFaceNormals(); // needed for helper

//

texture = new THREE.CanvasTexture( generateTexture( data, worldWidth, worldDepth ) );
texture.wrapS = THREE.ClampToEdgeWrapping;
Expand All @@ -115,13 +122,6 @@
helper = new THREE.Mesh( geometry, new THREE.MeshNormalMaterial() );
scene.add( helper );

renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );

container.innerHTML = "";

container.appendChild( renderer.domElement );
container.addEventListener( 'mousemove', onMouseMove, false );

stats = new Stats();
Expand All @@ -145,13 +145,13 @@
function generateHeight( width, height ) {

var size = width * height, data = new Uint8Array( size ),
perlin = new ImprovedNoise(), quality = 1, z = Math.random() * 100;
perlin = new ImprovedNoise(), quality = 1, z = Math.random() * 100;

for ( var j = 0; j < 4; j ++ ) {

for ( var i = 0; i < size; i ++ ) {

var x = i % width, y = ~~ ( i / width );
var x = i % width, y = ~ ~ ( i / width );
data[ i ] += Math.abs( perlin.noise( x / quality, y / quality, z ) * quality * 1.75 );

}
Expand All @@ -166,8 +166,10 @@

function generateTexture( data, width, height ) {

// bake lighting into texture

var canvas, canvasScaled, context, image, imageData,
level, diff, vector3, sun, shade;
level, diff, vector3, sun, shade;

vector3 = new THREE.Vector3( 0, 0, 0 );

Expand Down Expand Up @@ -197,6 +199,7 @@
imageData[ i ] = ( 96 + shade * 128 ) * ( 0.5 + data[ j ] * 0.007 );
imageData[ i + 1 ] = ( 32 + shade * 96 ) * ( 0.5 + data[ j ] * 0.007 );
imageData[ i + 2 ] = ( shade * 96 ) * ( 0.5 + data[ j ] * 0.007 );

}

context.putImageData( image, 0, 0 );
Expand All @@ -216,7 +219,7 @@

for ( var i = 0, l = imageData.length; i < l; i += 4 ) {

var v = ~~ ( Math.random() * 5 );
var v = ~ ~ ( Math.random() * 5 );

imageData[ i ] += v;
imageData[ i + 1 ] += v;
Expand All @@ -243,7 +246,6 @@

function render() {

controls.update();
renderer.render( scene, camera );

}
Expand Down