47 lines
938 B
JavaScript
47 lines
938 B
JavaScript
import UniformNode from '../core/UniformNode.js';
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import { NodeUpdateType } from '../core/constants.js';
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import { nodeProxy } from '../shadernode/ShaderNode.js';
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import { addNodeClass } from '../core/Node.js';
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class MaxMipLevelNode extends UniformNode {
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constructor( textureNode ) {
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super( 0 );
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this.textureNode = textureNode;
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this.updateType = NodeUpdateType.FRAME;
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}
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get texture() {
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return this.textureNode.value;
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}
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update() {
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const texture = this.texture;
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const images = texture.images;
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const image = ( images && images.length > 0 ) ? ( ( images[ 0 ] && images[ 0 ].image ) || images[ 0 ] ) : texture.image;
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if ( image && image.width !== undefined ) {
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const { width, height } = image;
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this.value = Math.log2( Math.max( width, height ) );
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}
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}
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}
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export default MaxMipLevelNode;
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export const maxMipLevel = nodeProxy( MaxMipLevelNode );
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addNodeClass( 'MaxMipLevelNode', MaxMipLevelNode );
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