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en:math_guide_conversions [2020/11/29 07:25]
JSCAD Editor created 		en:math_guide_conversions [2022/04/16 04:28] (current)
rozek included "require" statements
Line 1: Line 1:
 ===== Conversions ===== ===== Conversions =====
  
-degToRad+==== Conversions between Degrees and Radians ====
  
-radToDeg+Convert the given angle (degrees) to radians.
  
-radiusToSegments+<code javascript> 
 +const { degToRad } = require('@jscad/modeling').utils 
 +let radians = degToRad(90) // PI / 2 radians 
 +</code>
  
 +Convert the given angle (radians) to degrees.
 +
 +<code javascript>
 +const { radToDeg } = require('@jscad/modeling').utils
 +let degrees = radToDeg(Math.PI / 2) // 90 degrees
 +</code>
 +
 +==== Conversions of Radius to Segments ====
 +
 +Calculate the number of segments to complete the given radius (full rotation), using either minimum length or minimum angle.
 +
 +There are various round shapes that support the 'segments' option. However, designs may require a specific 'precision' for specific shapes. For example, an arc as part of a path requires specific length segments for proper laser cutting.
 +
 +This function can be used to calculate the appropriate number of segments based on the radius of the rounded shape.
 +
 +Using the above example, the arc has a radius of 3.5 mm (units are typically mm). The laser printer requires 0.1 mm segments or more while moving. The segments can be calculated, and supplied when creating the arc.
 +
 +<code javascript>
 +const { radiusToSegments } = require('@jscad/modeling').utils
 +
 +let segments = radiusToSegments(3.5, 0.1, 0) /* use minimum length */
 +let segments = radiusToSegments(3.5, 0, Math.PI * 2 / 300) /* use minimum angle */ 
 +</code>
 +
 +//NOTE: The number of segments can become large depending on the 'precision' requirements. Testing designs with a lower number of segments is recommended.//