@ue-too/board / index / angleSpan

関数: angleSpan()

angleSpan(from, to): number

定義: packages/board/src/camera/utils/rotation.ts:274

Calculates the signed angular distance between two angles, taking the shorter path.

パラメータ

from

number

Starting angle in radians

to

number

Target angle in radians

戻り値

number

Signed angular difference in radians, in the range (-π, π]

Remarks

Returns the shortest angular path from from to to:

• Positive value: rotate counter-clockwise (positive direction)
• Negative value: rotate clockwise (negative direction)
• Always returns the smaller of the two possible paths

例

angleSpan(0, Math.PI/2);        // π/2 (90° ccw)
angleSpan(Math.PI/2, 0);        // -π/2 (90° cw)
angleSpan(0, 3*Math.PI/2);      // -π/2 (shorter to go cw)
angleSpan(3*Math.PI/2, 0);      // π/2 (shorter to go ccw)
angleSpan(0, Math.PI);          // π (180°, ambiguous)