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giz_volume.html
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giz_volume.html
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<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title></title></head><body>
<script type="module">
//#region IMPORTS
import Starter, { THREE } from './_lib/Starter.js';
import facedCube from './_lib/FacedCube.js';
import ShapePointsMesh from './_lib/ShapePointsMesh.js';
import DynLineMesh from './_lib/DynLineMesh.js';
import Ray from '../src/Ray';
import intersectTri from '../src/intersects/intersectTri';
import intersectPlane from '../src/intersects/intersectPlane';
import nearPoint from '../src/intersects/nearPoint';
import { intersectSphere } from '../src/intersects/intersectSphere';
import { nearSegment, NearSegmentResult }
from '../src/intersects/nearSegment';
import { from3JSScreenProjection } from './_lib/UtilRay.js';
import { vec3, quat } from 'oito';
//#endregion
//#region MAIN
let App;
let Debug = {};
let Ref = {};
function onRender( dt=0, et=0 ){
Ref.rend.update( Ref.data );
App.orbit.enabled = !Ref.data.isDragging;
}
window.addEventListener( "load", async _=>{
App = new Starter( { webgl2:true, grid:true } );
App.setCamera( 0, 20, 4, [0,0.8,0] );
App.onRender = onRender;
// App.add( ( Debug.pnt = new ShapePointsMesh() ) );
// App.add( ( Debug.ln = new DynLineMesh() ) );
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
const data = new VolumeData();
const rend = new VolumeRender();
data.setPosition( [0, 0.6, 0] );
rend.toScene( App );
rend.update( data );
Ref.data = data;
Ref.rend = rend;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
App.render();
});
window.addEventListener( "pointermove", e=>{
//if( e.button != 2 ) return;
const ray = from3JSScreenProjection( new Ray(), e.layerX, e.layerY, App );
if( !Ref.data.isDragging ) Ref.data.onRayHover( ray );
else Ref.data.onRayMove( ray );
} );
window.addEventListener( "pointerdown", e=>{
//if( e.button != 2 ) return;
const ray = from3JSScreenProjection( new Ray(), e.layerX, e.layerY, App );
Ref.data.onRayDown( ray );
} );
window.addEventListener( "pointerup", e=>{
if( Ref.data.isDragging ) Ref.data._stopDrag();
} );
//#endregion
//#region LOREM
class VolumeData{
// #region MAIN
minPntDistance = 0.035;
minFaceDistance = 0.1;
hasUpdated = true;
isDragging = false;
position = [0,0,0];
minBound = [Infinity,Infinity,Infinity];
maxBound = [-Infinity,-Infinity,-Infinity];
activeFace = -1;
faces = [
{ dir:[ 0, 0, 1], len:0.5, pos:[0,0,0] },
{ dir:[ 0, 0,-1], len:0.5, pos:[0,0,0] },
{ dir:[ 0, 1, 0], len:0.5, pos:[0,0,0] },
{ dir:[ 0,-1, 0], len:0.5, pos:[0,0,0] },
{ dir:[ 1, 0, 0], len:0.5, pos:[0,0,0] },
{ dir:[-1, 0, 0], len:0.5, pos:[0,0,0] },
];
traceStep = 0.1;
traceLine = { isActive:false, a:[0,0,0], b:[0,0,0], dir:[0,0,0] };
onDragStart = null;
onDragEnd = null;
constructor(){
this._recomputePositions();
}
// #endregion
// #region SETTERS
setPosition( pos ){
vec3.copy( pos, this.position );
this._recomputePositions();
return this;
}
// #endregion
// #region DRAGGING
_startDrag(){
this.isDragging = true;
console.log( 'start Drag' );
if( this.onDragStart ) this.onDragStart();
}
_stopDrag(){
this.isDragging = false;
if( this.onDragEnd ) this.onDragEnd();
}
onRayDown( ray ){
if( this._rayIntersect( ray ) ){
this._startDrag();
return true;
}
return false
}
onRayHover( ray ){
return ( !this.isDragging )? this._rayIntersect( ray ) : false;
}
onRayMove( ray ){
if( !this.isDragging ) return false;
const segResult = new NearSegmentResult();
if( nearSegment( ray, this.traceLine.a, this.traceLine.b, segResult ) ){
const f = this.faces[ this.activeFace ];
f.len = Math.max( vec3.len( this.position, segResult.segPosition ), this.minFaceDistance );
this._recomputePositions();
return true;
}
return false;
}
// #endregion
// #region HELPERS
_setTraceLine( pos, iFace ){
this.traceLine.isActive = true;
const face = this.faces[ iFace ];
vec3.copy( pos, this.traceLine.a );
vec3.scaleThenAdd( face.dir, 1000, pos, this.traceLine.b );
}
// #endregion
// #region COMPUTE
_recomputePositions(){
this.hasUpdated = true;
// Reset Bounds
vec3.copy( [ Infinity, Infinity, Infinity], this.minBound );
vec3.copy( [-Infinity,-Infinity,-Infinity], this.maxBound );
// Compute face points & boundary area
let f;
for( f of this.faces ){
vec3.scaleThenAdd( f.dir, f.len, this.position, f.pos );
vec3.min( this.minBound, f.pos );
vec3.max( this.maxBound, f.pos );
}
}
// #endregion
// #region RAY INTERSECTION
_rayIntersect( ray ){
const lastState = this.activeFace;
this.activeFace = -1;
this.traceLine.isActive = false;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
let hit = this._testPoints( ray );
if( lastState !== this.activeFace ) this.hasUpdated = true;
return hit;
}
_testPoints( ray ){
let t = nearPoint( ray, this.position, this.minPntDistance );
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Test for origin,
// if( t !== null ){
// //this._setTraceLine( this.position );
// //console.log( 'origin' );
// this.activeFace = -2;
// return true;
// }
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
for( let i=0; i < this.faces.length; i++ ){
t = nearPoint( ray, this.faces[ i ].pos, this.minPntDistance );
if( t !== null ){
this._setTraceLine( this.position, i );
this.activeFace = i;
return true;
}
}
return false;
}
// #endregion
}
class VolumeRender{
meshLines = new DynLineMesh();
meshPoints = new ShapePointsMesh();
constructor(){}
toScene( scene ){
scene.add( this.meshLines );
scene.add( this.meshPoints );
}
update( data ){
if( !data.hasUpdated ) return;
data.hasUpdated = false;
// console.log( 'draw' );
const pnt = this.meshPoints.reset();
const ln = this.meshLines.reset();
// Origin Point
pnt.add( data.position, 0x909090, 4, 2 );
// Face Points
for( let f of data.faces ) pnt.add( f.pos, 0x909090, 2, 1 );
// TraceLine
if( data.traceLine.isActive ){
ln.add( data.traceLine.a, data.traceLine.b, 0x909090 );
}
// Box Lines
let col = 0x909090;
let isDash = true;
let x1 = data.minBound[0], y1 = data.minBound[1], z1 = data.minBound[2],
x2 = data.maxBound[0], y2 = data.maxBound[1], z2 = data.maxBound[2];
let a = [x1,y1,z1]; // bottom - top left corner - CCW
let b = [x1,y1,z2];
let c = [x2,y1,z2];
let d = [x2,y1,z1];
let e = [x1,y2,z1]; // bottom - top left corner - CCW
let f = [x1,y2,z2];
let g = [x2,y2,z2];
let h = [x2,y2,z1];
ln.add( a, b, col, null, isDash ); // Bottom
ln.add( b, c, col, null, isDash );
ln.add( c, d, col, null, isDash );
ln.add( d, a, col, null, isDash );
ln.add( e, f, col, null, isDash ); // Top
ln.add( f, g, col, null, isDash );
ln.add( g, h, col, null, isDash );
ln.add( h, e, col, null, isDash );
ln.add( a, e, col, null, isDash ); // Sides
ln.add( b, f, col, null, isDash );
ln.add( c, g, col, null, isDash );
ln.add( d, h, col, null, isDash );
ln._updateGeometry();
pnt._updateGeometry();
}
}
//#endregion
</script>
</body></html>