code_templates_sparkar

This is my snippets for Spark AR

UTILS.js

• getRand(low, high) - float between low - high

• getRandInt(low, high) - int between low - high. High is excluded.

• getRandBool() - bool with 1:1 ratio

• getRandSign() - get sign +/- with 1:1 ratio

• clamp(val, low, high) - fix value between

• sawToooth(signal) - triangle wave signal from input progress (0 - 1)

  1.00 ┤    ╭╮    
  0.75 ┤   ╭╯╰╮   
  0.50 ┤  ╭╯  ╰╮  
  0.25 ┤ ╭╯    ╰╮ 
  0.00 ┼─╯      ╰─ 
  

  • fractMod(signal, [mod=1]) - modulo which works for negative values. Default works like fract.

  1.00 ┼    ╭╮     ╭╮    ╭╮    ╭ 
  0.75 ┤   ╭╯│   ╭─╯│  ╭─╯│   ╭╯ 
  0.50 ┤  ╭╯ │ ╭─╯  │ ╭╯  │ ╭─╯  
  0.25 ┤╭─╯  │╭╯    │╭╯   │╭╯    
  0.00 ┼╯    ╰╯     ╰╯    ╰╯         
  

• deStep(signal, edge0, edge1) - short for double ended step.

  1.00 ┼   ╭───╮  
  0.00 ┼───╯   ╰─  
  

  If edge1 < edge0 it will flip:

  1.00 ┼───╮   ╭─ 
  0.00 ┤   ╰───╯   
  

• deSmoothStep(signal, edge0, edge1, delta, [mode="mid","in","out"]) - same as deStep, except smoothed. Default mode is "mid".

           |<---delta->|     
  1.00 ┼   |           |───────────────────────────╮                
  0.94 ┤   |          ╭╯                           ╰╮               
  0.88 ┤   |         ╭╯                             ╰╮              
  0.81 ┤   |         │                               ╰╮            
  0.75 ┤   |        ╭╯                                ╰╮            
  0.69 ┤   |       ╭╯                                  ╰╮            
  0.63 ┤   |      ╭╯                                    |           
  0.56 ┤   |      │                                     ╰╮          
  0.50 ┤   |     ╭╯                                      ╰╮         
  0.44 ┤   |    ╭|                                        │         
  0.38 ┤   |    │|                                        ╰╮        
  0.31 ┤   |   ╭╯|                                         ╰╮       
  0.25 ┤   |  ╭╯ |                                          │       
  0.19 ┤   | ╭╯  |                                          ╰╮      
  0.13 ┤   |╭╯   |                                           ╰╮     
  0.06 ┤   |╯    |                                            ╰─╮   
  0.00 ┼───╯     |                                              ╰── 
       |<--edge->|
  

todo: - minList() - maxList() - getVertex2MVP2d() - rayCastPlane() - smallFaceTransform() - getPersonEllipseMask() - getNormal() - rotateUV()