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[USDZExporter] added flipY support #25559

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merged 2 commits into from
Feb 24, 2023
Merged

[USDZExporter] added flipY support #25559

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f316bfb
added flipY support
elalish Feb 23, 2023
18f6520
spaces -> tabs
elalish Feb 23, 2023
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12 changes: 10 additions & 2 deletions examples/jsm/exporters/USDZExporter.js
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Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,7 @@ class USDZExporter {
const color = id.split( '_' )[ 1 ];
const isRGBA = texture.format === 1023;

const canvas = imageToCanvas( texture.image, color );
const canvas = imageToCanvas( texture.image, color, texture.flipY );
const blob = await new Promise( resolve => canvas.toBlob( resolve, isRGBA ? 'image/png' : 'image/jpeg', 1 ) );

files[ `textures/Texture_${ id }.${ isRGBA ? 'png' : 'jpg' }` ] = new Uint8Array( await blob.arrayBuffer() );
Expand Down Expand Up @@ -122,7 +122,7 @@ class USDZExporter {

}

function imageToCanvas( image, color ) {
function imageToCanvas( image, color, flipY ) {

if ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||
( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||
Expand All @@ -136,6 +136,14 @@ function imageToCanvas( image, color ) {
canvas.height = image.height * Math.min( 1, scale );

const context = canvas.getContext( '2d' );

if ( flipY === true ) {

context.translate( 0, canvas.height );
context.scale( 1, - 1 );

}

context.drawImage( image, 0, 0, canvas.width, canvas.height );

if ( color !== undefined ) {
Expand Down