Generate strip geometry by a curve and a strip descriptor.
Supports taper, twist, dasharray and uvgen.
import { Strip, StripGeometry, UvPreset, StripHelper } from 'omega/dist/Strip.js'
Strip
const strip = new Strip(
new THREE.LineCurve3(..), // curve: curve3|curvepath
1, // radius?: number|fn (half breadth)
0, // tilt?: number|fn (twist around tangent)
)
strip.curve
strip.radius
strip.tilt
strip.computeFrames(nSegs) // rhanded coords frames
ex.
new Strip(
new THREE.LineCurve3(..),
(i, I) => 1 - i / I, // taper
(i, I) => i / I * Math.PI // twist
)
StripGeometry ( extends BufferGeometry )
new StripGeometry(
strip, // strip
100, // segments?: number|array
undefined // uvgen?: fn
);
ex.
new StripGeometry(
strip,
[10, [1,2,3], 1], // segments=10, dashArray?=[1,2,3], dashOffset?=1
UvPreset.dash[0] // dash-space uvgen
);
// If dashArray has odd number of values,
// it's repeated to yield even number of values,
// i.e. `[1,2,3,1,2,3]`
StripHelper ( extends LineSegments )
const helper = new StripHelper(
strip, // strip
100 // segments: number
1 // size?: axes size
0xff0000 // xColor?: xAxis color
0x00ff00 // yColor?: yAxis color
0x0000ff // zColor?: zAxis color
);
helper.strip
helper.segments
helper.size
helper.xColor
helper.yColor
helper.zColor
helper.update()
ex.
const helper = new StripHelper(strip, 10);
helper.xColor.setClassName("purple");
helper.segments *= 2;
helper.update();
UvPreset
UvPreset.dash; // arr of dash-space uvgen.
UvPreset.strip; // arr of strip-space uvgen.
ex.
new StripGeometry(strip, [100, [1, 2]], UvPreset.dash[0]);
new StripGeometry(strip, 100, UvPreset.strip[0]);