diff options
Diffstat (limited to 'tools/mq_editor/utils.js')
| -rw-r--r-- | tools/mq_editor/utils.js | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/tools/mq_editor/utils.js b/tools/mq_editor/utils.js index ed34b8e..7ab274e 100644 --- a/tools/mq_editor/utils.js +++ b/tools/mq_editor/utils.js @@ -55,16 +55,29 @@ function getCanvasCoords(e, canvas) { // Build upper/lower band point arrays for a frequency curve. // factorAbove/factorBelow are fractional offsets (e.g. 0.02 = ±2%). +// freqMult: optional frequency scaling for harmonics (default 1.0). // Returns { upper: [[x,y],...], lower: [[x,y],...] } -function buildBandPoints(viewer, curve, factorAbove, factorBelow) { +function buildBandPoints(viewer, curve, factorAbove, factorBelow, freqMult = 1.0) { const STEPS = 60; const upper = [], lower = []; for (let i = 0; i <= STEPS; ++i) { const t = curve.t0 + (curve.t3 - curve.t0) * i / STEPS; if (t < viewer.t_view_min - 0.01 || t > viewer.t_view_max + 0.01) continue; - const f = evalBezier(curve, t); + const f = evalBezier(curve, t) * freqMult; upper.push([viewer.timeToX(t), viewer.freqToY(f * (1 + factorAbove))]); lower.push([viewer.timeToX(t), viewer.freqToY(f * (1 - factorBelow))]); } return { upper, lower }; } + +// Build center line points at freq * freqMult along the curve. +function buildCenterPoints(viewer, curve, freqMult = 1.0) { + const STEPS = 60; + const pts = []; + for (let i = 0; i <= STEPS; ++i) { + const t = curve.t0 + (curve.t3 - curve.t0) * i / STEPS; + if (t < viewer.t_view_min - 0.01 || t > viewer.t_view_max + 0.01) continue; + pts.push([viewer.timeToX(t), viewer.freqToY(evalBezier(curve, t) * freqMult)]); + } + return pts; +} |