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en:math_guide_conversions [2021/05/01 04:36]
JSCAD Editor 		en:math_guide_conversions [2022/04/16 04:28] (current)
rozek included "require" statements
Line 6: Line 6:
  
 <code javascript> <code javascript>
 +const { degToRad } = require('@jscad/modeling').utils
 let radians = degToRad(90) // PI / 2 radians let radians = degToRad(90) // PI / 2 radians
 </code> </code>
Line 12: Line 13:
  
 <code javascript> <code javascript>
 +const { radToDeg } = require('@jscad/modeling').utils
 let degrees = radToDeg(Math.PI / 2) // 90 degrees let degrees = radToDeg(Math.PI / 2) // 90 degrees
 </code> </code>
Line 17: Line 19:
 ==== 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.+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. Often times, a design requires a specific precision for each segment. This function assists by calculating the appropriate number of segments based on radius, as well as 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 */  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.//