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en:math_guide_conversions [2021/05/01 04:28]
JSCAD Editor [Conversions of Radius to Segments] 		en:math_guide_conversions [2022/04/16 04:28] (current)
rozek included "require" statements
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 Convert the given angle (degrees) to radians. Convert the given angle (degrees) to radians.
  
-degToRad+<code javascript> 
 +const { degToRad } = require('@jscad/modeling').utils 
 +let radians = degToRad(90) // PI / 2 radians 
 +</code>
  
 Convert the given angle (radians) to degrees. Convert the given angle (radians) to degrees.
  
-radToDeg+<code javascript> 
 +const { radToDeg } = require('@jscad/modeling').utils 
 +let degrees = radToDeg(Math.PI / 2) // 90 degrees 
 +</code>
  
 ==== Conversions of Radius to Segments ==== ==== Conversions of Radius to Segments ====
  
-Calculate the number of segments from the given radius based on minimum length or angle. There are various round shapes that+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> <code javascript>
 +const { radiusToSegments } = require('@jscad/modeling').utils
 +
 let segments = radiusToSegments(3.5, 0.1, 0) /* use minimum length */ let segments = radiusToSegments(3.5, 0.1, 0) /* use minimum length */
 +let segments = radiusToSegments(3.5, 0, Math.PI * 2 / 300) /* use minimum angle */ 
 </code> </code>
 +
 +//NOTE: The number of segments can become large depending on the 'precision' requirements. Testing designs with a lower number of segments is recommended.//