File size: 2,755 Bytes
b797337 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | import { CubeReflectionMapping, CubeRefractionMapping, EquirectangularReflectionMapping, EquirectangularRefractionMapping } from '../../constants.js';
import { PMREMGenerator } from '../../extras/PMREMGenerator.js';
function WebGLCubeUVMaps( renderer ) {
let cubeUVmaps = new WeakMap();
let pmremGenerator = null;
function get( texture ) {
if ( texture && texture.isTexture ) {
const mapping = texture.mapping;
const isEquirectMap = ( mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping );
const isCubeMap = ( mapping === CubeReflectionMapping || mapping === CubeRefractionMapping );
// equirect/cube map to cubeUV conversion
if ( isEquirectMap || isCubeMap ) {
if ( texture.isRenderTargetTexture && texture.needsPMREMUpdate === true ) {
texture.needsPMREMUpdate = false;
let renderTarget = cubeUVmaps.get( texture );
if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture, renderTarget ) : pmremGenerator.fromCubemap( texture, renderTarget );
cubeUVmaps.set( texture, renderTarget );
return renderTarget.texture;
} else {
if ( cubeUVmaps.has( texture ) ) {
return cubeUVmaps.get( texture ).texture;
} else {
const image = texture.image;
if ( ( isEquirectMap && image && image.height > 0 ) || ( isCubeMap && image && isCubeTextureComplete( image ) ) ) {
if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
const renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture ) : pmremGenerator.fromCubemap( texture );
cubeUVmaps.set( texture, renderTarget );
texture.addEventListener( 'dispose', onTextureDispose );
return renderTarget.texture;
} else {
// image not yet ready. try the conversion next frame
return null;
}
}
}
}
}
return texture;
}
function isCubeTextureComplete( image ) {
let count = 0;
const length = 6;
for ( let i = 0; i < length; i ++ ) {
if ( image[ i ] !== undefined ) count ++;
}
return count === length;
}
function onTextureDispose( event ) {
const texture = event.target;
texture.removeEventListener( 'dispose', onTextureDispose );
const cubemapUV = cubeUVmaps.get( texture );
if ( cubemapUV !== undefined ) {
cubeUVmaps.delete( texture );
cubemapUV.dispose();
}
}
function dispose() {
cubeUVmaps = new WeakMap();
if ( pmremGenerator !== null ) {
pmremGenerator.dispose();
pmremGenerator = null;
}
}
return {
get: get,
dispose: dispose
};
}
export { WebGLCubeUVMaps };
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