65 lines
1.3 KiB
JavaScript
65 lines
1.3 KiB
JavaScript
import { IsLower } from '../geometry/geometry.js';
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export function NameFromLine (line, startIndex, commentChar)
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{
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let name = line.substr (startIndex);
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let commentStart = name.indexOf (commentChar);
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if (commentStart !== -1) {
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name = name.substr (0, commentStart);
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}
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return name.trim ();
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}
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export function ParametersFromLine (line, commentChar)
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{
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if (commentChar !== null) {
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let commentStart = line.indexOf (commentChar);
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if (commentStart !== -1) {
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line = line.substr (0, commentStart).trim ();
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}
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}
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return line.split (/\s+/u);
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}
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export function ReadLines (str, onLine)
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{
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function LineFound (line, onLine)
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{
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let trimmed = line.trim ();
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if (trimmed.length > 0) {
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onLine (trimmed);
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}
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}
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let cursor = 0;
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let next = str.indexOf ('\n', cursor);
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while (next !== -1) {
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LineFound (str.substr (cursor, next - cursor), onLine);
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cursor = next + 1;
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next = str.indexOf ('\n', cursor);
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}
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LineFound (str.substr (cursor), onLine);
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}
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export function IsPowerOfTwo (x)
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{
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return (x & (x - 1)) === 0;
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}
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export function NextPowerOfTwo (x)
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{
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if (IsPowerOfTwo (x)) {
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return x;
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}
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let npot = Math.pow (2, Math.ceil (Math.log (x) / Math.log (2)));
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return parseInt (npot, 10);
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}
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export function UpdateMaterialTransparency (material)
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{
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material.transparent = false;
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if (IsLower (material.opacity, 1.0)) {
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material.transparent = true;
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}
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}
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