three-stdlib
Version:
stand-alone library of threejs examples
70 lines (69 loc) • 2.9 kB
JavaScript
;
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
class PositionalAudioHelper extends THREE.Line {
constructor(audio, range = 1, divisionsInnerAngle = 16, divisionsOuterAngle = 2) {
const geometry = new THREE.BufferGeometry();
const divisions = divisionsInnerAngle + divisionsOuterAngle * 2;
const positions = new Float32Array((divisions * 3 + 3) * 3);
geometry.setAttribute("position", new THREE.BufferAttribute(positions, 3));
const materialInnerAngle = new THREE.LineBasicMaterial({ color: 65280 });
const materialOuterAngle = new THREE.LineBasicMaterial({ color: 16776960 });
super(geometry, [materialOuterAngle, materialInnerAngle]);
this.type = "PositionalAudioHelper";
this.audio = audio;
this.range = range;
this.divisionsInnerAngle = divisionsInnerAngle;
this.divisionsOuterAngle = divisionsOuterAngle;
this.update();
}
update() {
const audio = this.audio;
const range = this.range;
const divisionsInnerAngle = this.divisionsInnerAngle;
const divisionsOuterAngle = this.divisionsOuterAngle;
const coneInnerAngle = THREE.MathUtils.degToRad(audio.panner.coneInnerAngle);
const coneOuterAngle = THREE.MathUtils.degToRad(audio.panner.coneOuterAngle);
const halfConeInnerAngle = coneInnerAngle / 2;
const halfConeOuterAngle = coneOuterAngle / 2;
let start = 0;
let count = 0;
let i, stride;
const geometry = this.geometry;
const positionAttribute = geometry.attributes.position;
geometry.clearGroups();
function generateSegment(from, to, divisions, materialIndex) {
const step = (to - from) / divisions;
positionAttribute.setXYZ(start, 0, 0, 0);
count++;
for (i = from; i < to; i += step) {
stride = start + count;
positionAttribute.setXYZ(stride, Math.sin(i) * range, 0, Math.cos(i) * range);
positionAttribute.setXYZ(
stride + 1,
Math.sin(Math.min(i + step, to)) * range,
0,
Math.cos(Math.min(i + step, to)) * range
);
positionAttribute.setXYZ(stride + 2, 0, 0, 0);
count += 3;
}
geometry.addGroup(start, count, materialIndex);
start += count;
count = 0;
}
generateSegment(-halfConeOuterAngle, -halfConeInnerAngle, divisionsOuterAngle, 0);
generateSegment(-halfConeInnerAngle, halfConeInnerAngle, divisionsInnerAngle, 1);
generateSegment(halfConeInnerAngle, halfConeOuterAngle, divisionsOuterAngle, 0);
positionAttribute.needsUpdate = true;
if (coneInnerAngle === coneOuterAngle)
this.material[0].visible = false;
}
dispose() {
this.geometry.dispose();
this.material[0].dispose();
this.material[1].dispose();
}
}
exports.PositionalAudioHelper = PositionalAudioHelper;
//# sourceMappingURL=PositionalAudioHelper.cjs.map