9 #ifndef pixie_utility_h
10 #define pixie_utility_h
19 -2, -2, -2, -2, -2, -2, -2,
20 -2, -2, -2, -2, -2, -2, -2,
21 -2, -1, -1, -1, -1, -1, -2,
22 -2, -1, -1, -1, -1, -1, -2,
23 -2, -1, -1, -1, -1, -1, -2,
24 -2, -1, -1, -1, -1, -1, -2,
25 -2, -1, -1, -1, -1, -1, -2,
26 -2, -1, -1, -1, -1, -1, -2,
27 -2, -1, -1, -1, -1, -1, -2,
28 -2, -2, -2, -2, -2, -2, -2,
29 -2, -2, -2, -2, -2, -2, -2
34 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
35 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
36 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2,
37 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5,
38 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10,
39 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16,
40 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
41 25, 26, 27, 27, 28, 29, 29, 30, 31, 32, 32, 33, 34, 35, 35, 36,
42 37, 38, 39, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 50,
43 51, 52, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68,
44 69, 70, 72, 73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89,
45 90, 92, 93, 95, 96, 98, 99, 101,102,104,105,107,109,110,112,114,
46 115,117,119,120,122,124,126,127,129,131,133,135,137,138,140,142,
47 144,146,148,150,152,154,156,158,160,162,164,167,169,171,173,175,
48 177,180,182,184,186,189,191,193,196,198,200,203,205,208,210,213,
49 215,218,220,223,225,228,231,233,236,239,241,244,247,249,252,255
60 char*
dtoa(
double input,
char* buffer,
int precision) {
61 int32_t whole_part = (int32_t) input;
64 itoa( whole_part, buffer, 10 );
71 char* end_of_string = buffer;
72 while( *end_of_string !=
'\0' ){
75 *end_of_string++ =
'.';
84 double fraction = input - whole_part;
85 while (precision > 0) {
88 whole_part = (int32_t) fraction;
89 *end_of_string++ =
'0' + whole_part;
93 fraction -= whole_part;
98 *end_of_string =
'\0';
This is the software documentation for using Pixie Chroma functions on Arduino! For full example usag...
char * dtoa(double input, char *buffer, int precision)
Homebrew C function to convert double precision floats to char*. (Arduino Forum link)
const uint8_t gamma8[]
Used as a fast lookup table for gamma correction.
void(* anim_func)(PixieChroma *_p, float delta)
Used to store the pointer to any preset/custom animation functions the library needs to call during s...
const int8_t xy_template[77] PROGMEM
Used as a template by calc_xy() to build the XY coordinate map for accessing 1D LEDS in a 2D context.