three
Version:
JavaScript 3D library
41 lines (22 loc) • 722 B
JavaScript
import UniformNode from '../core/UniformNode.js';
import { NodeUpdateType } from '../core/constants.js';
class MaxMipLevelNode extends UniformNode {
constructor( textureNode ) {
super( 0 );
this.textureNode = textureNode;
this.updateType = NodeUpdateType.FRAME;
}
get texture() {
return this.textureNode.value;
}
update() {
const texture = this.texture;
const images = texture.images;
const image = ( images && images.length > 0 ) ? ( ( images[ 0 ] && images[ 0 ].image ) || images[ 0 ] ) : texture.image;
if ( image && image.width !== undefined ) {
const { width, height } = image;
this.value = Math.log2( Math.max( width, height ) );
}
}
}
export default MaxMipLevelNode;