fastled_prompt_ai_example

fastled example prompts

one day
=======

 "I'd like to add the 2nd order smoothstep function to a few places in the SousaVFX.ino cpp file.\r\rHere is the function:\r\r```cpp\rfloat smootherstep(float edge0, float edge1, float x) {\r  // Scale, and clamp x to 0..1 range\r  x = clamp((x - edge0) / (edge1 - edge0));\r\r  return x * x * x * (x * (6.0f * x - 15.0f) + 10.0f);\r}\r\rfloat clamp(float x, float lowerlimit = 0.0f, float upperlimit = 1.0f) {\r  if (x < lowerlimit) return lowerlimit;\r  if (x > upperlimit) return upperlimit;\r  return x;\r}\r```\r\rAnd I'd like it to be utilized in a couple places where there are linear fades, to smooth the linearity. Namely, here on line 189\r\r```SousaVFX.ino\r      // Calculate fade out above certain radius\r      float radiiFade;\r      if (radHiRez >= (radiusCutoffEnd)) {\r        radiiFade = 0.0f;\r      } else if (radHiRez > radiusCutoff) {\r        radiiFade = (radiusCutoffSlope * ((radHiRez * radiiNorm) - radiusCutoffNorm) + 1.0f);\r      } else {\r        radiiFade = 1.0f;\r      }\r```\r\rand here on line 183:\r\r```SousaVFX.ino\r      // Calculate pinwheel division's fade ins and outs\r      int32_t deltaFixed = static_cast<int32_t>(normalizedPos16) - static_cast<int32_t>(peakPosFixed);\r      float currentSlope = (normalizedPos16 < peakPosFixed) ? adjSlopeIn : adjSlopeOut;\r      float fade = (deltaFixed * currentSlope) + 255.0f;\r      float dimmermask = (normalizedPos16 < divisionWidthFixed && fade > 0.0f) ? fade : 0.0f;\r```",

 "Rename the clamp helper to avoid the FastLED clamp template collision",

 "Apply smootherstep to the palette nblend transition for smoother color crossfades",

 "This works, but the teensy seems to be struggling processing-wise. Is there something that could be done to make it less computationally expensive?",

 "This is a Teensy 3.2, so let's add a LUT",

 "Well, I've updated my libraries just for the heck of it, and now I see this error when compiling:\n\nMultiple libraries were found for \"FastLED.h\"\r  Used: /Users/jbaylies/Documents/Arduino/libraries/FastLED\r  Not used: /Users/jbaylies/Library/Arduino15/packages/teensy/hardware/avr/1.62.0/libraries/FastLED\rexit status 1\r\rCompilation error: 'FASTLED_USING_NAMESPACE' does not name a type",

 "this compiled successfully and seems to be working well on the teensy 3.2, thanks! There are the errors that appeared in the console, but they may be ignorable:",

 "For the sake of me learning new things, could you explain where lerp8 comes from and how it works?",

 "I believe you mentioned at some point that there was a possible division by 0 somewhere that would skip the calculation. Where was that?",

 "Since we're using a lookup table now, let's try the 7th order smoothstep function, shown here: https://en.wikipedia.org/wiki/Smoothstep#7th-order_equation",

 "Beautiful, thanks! Out of curiosity, how does doing this improve performance? \n\n  float t2 = t * t;\r  float t4 = t2 * t2;\n\nin this function\n\nfloat smootherstep01(float t) {\r  t = clampFloat(t);\r\r  float t2 = t * t;\r  float t4 = t2 * t2;\r  // -20t^7 + 70t^6 - 84t^5 + 35t^4 = t^4 * (35 - 84t + 70t^2 - 20t^3)\r  float inner = 35.0f - t * (84.0f - t * (70.0f - 20.0f * t));\r  return t4 * inner;\r}",