mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-16 19:17:57 +01:00
120 lines
2.2 KiB
JavaScript
Executable File
120 lines
2.2 KiB
JavaScript
Executable File
/*
|
|
* @author zz85 / http://github.com/zz85
|
|
* @author WestLangley / http://github.com/WestLangley
|
|
*
|
|
* tool for "unwrapping" and debugging three.js
|
|
* geometries UV mapping
|
|
*
|
|
* Sample usage:
|
|
* document.body.appendChild(
|
|
* THREE.UVsDebug(
|
|
* new THREE.SphereGeometry(10,10,10,10));
|
|
*
|
|
*/
|
|
|
|
THREE.UVsDebug = function( geometry, size ) {
|
|
|
|
// handles wrapping of uv.x > 1 only
|
|
|
|
var abc = 'abcd';
|
|
|
|
var uv, u, ax, ay;
|
|
var i, il, j, jl;
|
|
var vnum;
|
|
|
|
var a = new THREE.Vector2();
|
|
var b = new THREE.Vector2();
|
|
|
|
var faces = geometry.faces;
|
|
var uvs = geometry.faceVertexUvs[ 0 ];
|
|
|
|
var canvas = document.createElement( 'canvas' );
|
|
var width = size || 1024; // power of 2 required for wrapping
|
|
var height = size || 1024;
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
|
|
var ctx = canvas.getContext( '2d' );
|
|
ctx.lineWidth = 2;
|
|
ctx.strokeStyle = 'rgba( 0, 0, 0, 1.0 )';
|
|
ctx.textAlign = 'center';
|
|
|
|
// paint background white
|
|
|
|
ctx.fillStyle = 'rgba( 255, 255, 255, 1.0 )';
|
|
ctx.fillRect( 0, 0, width, height );
|
|
|
|
for ( i = 0, il = uvs.length; i < il; i ++ ) {
|
|
|
|
uv = uvs[ i ];
|
|
|
|
// draw lines
|
|
|
|
ctx.beginPath();
|
|
|
|
a.set( 0, 0 );
|
|
|
|
for ( j = 0, jl = uv.length; j < jl; j ++ ) {
|
|
|
|
u = uv[ j ];
|
|
|
|
a.x += u.x;
|
|
a.y += u.y;
|
|
|
|
if ( j == 0 ) {
|
|
|
|
ctx.moveTo( u.x * width, ( 1 - u.y ) * height );
|
|
|
|
} else {
|
|
|
|
ctx.lineTo( u.x * width, ( 1 - u.y ) * height );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ctx.closePath();
|
|
ctx.stroke();
|
|
|
|
a.divideScalar( jl );
|
|
|
|
// label the face number
|
|
|
|
ctx.font = "12pt Arial bold";
|
|
ctx.fillStyle = 'rgba( 0, 0, 0, 1.0 )';
|
|
ctx.fillText( i, a.x * width, ( 1 - a.y ) * height );
|
|
|
|
if ( a.x > 0.95 ) { // wrap x // 0.95 is arbitrary
|
|
|
|
ctx.fillText( i, ( a.x % 1 ) * width, ( 1 - a.y ) * height );
|
|
|
|
}
|
|
|
|
ctx.font = "8pt Arial bold";
|
|
ctx.fillStyle = 'rgba( 0, 0, 0, 1.0 )';
|
|
|
|
// label uv edge orders
|
|
|
|
for ( j = 0, jl = uv.length; j < jl; j ++ ) {
|
|
|
|
u = uv[ j ];
|
|
b.addVectors( a, u ).divideScalar( 2 );
|
|
|
|
vnum = faces[ i ][ abc[ j ] ];
|
|
ctx.fillText( abc[ j ] + vnum, b.x * width, ( 1 - b.y ) * height );
|
|
|
|
if ( b.x > 0.95 ) { // wrap x
|
|
|
|
ctx.fillText( abc[ j ] + vnum, ( b.x % 1 ) * width, ( 1 - b.y ) * height );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return canvas;
|
|
|
|
}
|
|
|