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Examples: even more Geometry -> BufferGeometry #14579

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Jul 30, 2018
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Examples: even more Geometry -> BufferGeometry #14579

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c52260d
Geometry -> BufferGeometry
WestLangley Jul 30, 2018
368a0e4
Clean up
WestLangley Jul 30, 2018
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21 changes: 11 additions & 10 deletions examples/canvas_geometry_terrain.html
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Original file line number Diff line number Diff line change
Expand Up @@ -71,17 +71,19 @@

var data = generateHeight( 1024, 1024 );
var texture = new THREE.CanvasTexture( generateTexture( data, 1024, 1024 ) );
var material = new THREE.MeshBasicMaterial( { map: texture, overdraw: 0.5 } );
var material = new THREE.MeshBasicMaterial( { map: texture, side: THREE.DoubleSide, overdraw: 0.5 } );

var quality = 16, step = 1024 / quality;

var geometry = new THREE.PlaneGeometry( 2000, 2000, quality - 1, quality - 1 );
var geometry = new THREE.PlaneBufferGeometry( 2000, 2000, quality - 1, quality - 1 );
geometry.rotateX( - Math.PI / 2 );

for ( var i = 0, l = geometry.vertices.length; i < l; i ++ ) {
var positions = geometry.attributes.position;

for ( var i = 0, l = positions.count; i < l; i ++ ) {

var x = i % quality, y = Math.floor( i / quality );
geometry.vertices[ i ].y = data[ ( x * step ) + ( y * step ) * 1024 ] * 2 - 128;
positions.setY( i, data[ ( x * step ) + ( y * step ) * 1024 ] * 2 - 128 );

}

Expand Down Expand Up @@ -122,15 +124,15 @@
function generateHeight( width, height ) {

var data = new Uint8Array( width * height ), perlin = new ImprovedNoise(),
size = width * height, quality = 2, z = Math.random() * 100;
size = width * height, quality = 2, z = Math.random() * 100;

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

quality *= 4;

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 ) * 0.5 ) * quality + 10;

}
Expand All @@ -144,7 +146,7 @@
function generateTexture( data, width, height ) {

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

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

Expand All @@ -162,7 +164,7 @@
image = context.getImageData( 0, 0, width, height );
imageData = image.data;

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

vector3.x = data[ j - 1 ] - data[ j + 1 ];
vector3.y = 2;
Expand All @@ -183,7 +185,7 @@

}

function onDocumentMouseMove(event) {
function onDocumentMouseMove( event ) {

mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
Expand Down Expand Up @@ -211,7 +213,6 @@

}


</script>

</body>
Expand Down
43 changes: 23 additions & 20 deletions examples/canvas_lines_sphere.html
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Original file line number Diff line number Diff line change
Expand Up @@ -26,29 +26,28 @@
<script>

var SCREEN_WIDTH = window.innerWidth,
SCREEN_HEIGHT = window.innerHeight,
SCREEN_HEIGHT = window.innerHeight,

mouseX = 0, mouseY = 0,
mouseX = 0, mouseY = 0,

windowHalfX = window.innerWidth / 2,
windowHalfY = window.innerHeight / 2,
windowHalfX = window.innerWidth / 2,
windowHalfY = window.innerHeight / 2,

SEPARATION = 200,
AMOUNTX = 10,
AMOUNTY = 10,
SEPARATION = 200,
AMOUNTX = 10,
AMOUNTY = 10,

camera, scene, renderer;
camera, scene, renderer;

init();
animate();

function init() {

var container, separation = 100, amountX = 50, amountY = 50,
particles, particle;
var container, separation = 100, amountX = 50, amountY = 50, particles, particle;

container = document.createElement('div');
document.body.appendChild(container);
container = document.createElement( 'div' );
document.body.appendChild( container );

camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
camera.position.z = 1000;
Expand Down Expand Up @@ -83,33 +82,36 @@
particle.position.y = Math.random() * 2 - 1;
particle.position.z = Math.random() * 2 - 1;
particle.position.normalize();
particle.position.multiplyScalar( Math.random() * 10 + 450 );
particle.position.multiplyScalar( 450 );
particle.scale.multiplyScalar( 2 );
scene.add( particle );

}

// lines

for (var i = 0; i < 300; i++) {
var vertices = [];

var geometry = new THREE.Geometry();
for ( var i = 0; i < 300; i ++ ) {

var vertex = new THREE.Vector3( Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1 );
vertex.normalize();
vertex.multiplyScalar( 450 );

geometry.vertices.push( vertex );
vertices.push( vertex );

var vertex2 = vertex.clone();
vertex2.multiplyScalar( Math.random() * 0.3 + 1 );

geometry.vertices.push( vertex2 );
vertices.push( vertex2 );

var line = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0xffffff, opacity: Math.random() } ) );
scene.add( line );
}

var geometry = new THREE.BufferGeometry().setFromPoints( vertices );

var line = new THREE.LineSegments( geometry, new THREE.LineBasicMaterial( { color: 0xffffff } ) );
scene.add( line );

document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
Expand All @@ -134,10 +136,11 @@

//

function onDocumentMouseMove(event) {
function onDocumentMouseMove( event ) {

mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;

}

function onDocumentTouchStart( event ) {
Expand Down