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@ -1,8 +1,9 @@
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Shader "CrispyPin/QRCode" {
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Properties {
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[HideInInspector]
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_("",2D)=""
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_Version("Version", Integer) = 1
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_("",2D)=""{}
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_Version("Version", Range(1, 40)) = 1
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_TimeSlider("Time", Range(0, 250)) = 0
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}
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SubShader {
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Tags { "RenderType"="Opaque" }
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@ -11,13 +12,19 @@ CGPROGRAM
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#pragma surface s Standard
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struct Input{float2 uv_;};
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uint _Version;
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float _TimeSlider;
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#define VERSION _Version
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#define WIDTH (17 + VERSION * 4)
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#define PIXEL_WIDTH WIDTH
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// #define PIXEL_WIDTH 177
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#define ALIGNERS ((VERSION / 7) + 2)
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#define ALIGNER_SPACING_IDEAL ((WIDTH - 13) / (ALIGNERS-1))
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#define ALIGNER_SPACING (ALIGNER_SPACING_IDEAL + ALIGNER_SPACING_IDEAL % 2)
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#define MISALIGNMENT ((WIDTH - 13) - ALIGNER_SPACING * ALIGNERS)
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#define BIT_COUNT (WIDTH * WIDTH - 225 - (WIDTH - 17)*2)
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#define TIME (_Time.y*24)
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// #define TIME (uint)(_TimeSlider)
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#define EC_LEVEL_L 1
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#define EC_LEVEL_M 0
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@ -40,24 +47,24 @@ CGPROGRAM
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#define WHITE 1
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#define BLACK 0
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#define PINK float4(1, .3, .5, 1)
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#define BLUE float4(0, .4, .7, 1)
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#define PINK float3(1, .3, .5)
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#define BLUE float3(0, .4, .7)
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#define CYAN float3(0,1,1)
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float4 finder_pattern(uint x, uint y) {
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float3 finder_pattern(uint x, uint y) {
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if (x < 6 && x > 0 && y < 6 && y > 0) return !(x < 5 && x > 1 && y < 5 && y > 1);
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return (x > 6 || y > 6);
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}
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float4 main (float2 uv){
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float3 main (float2 uv){
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const uint data[] = {0x68656c6c,0x6f20776f,0x726c6421};
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uv.y = 1 - uv.y;
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uv = uv * 1.5 - 0.25;
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// Quiet zone
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if (uv.x < 0 || uv.x > 1 || uv.y < 0 || uv.y > 1) return 1;
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uint px = uv.x * WIDTH;
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uint py = uv.y * WIDTH;
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uint px = uv.x * PIXEL_WIDTH;
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uint py = uv.y * PIXEL_WIDTH;
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// Finder patterns
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if (px < 8 && py < 8) return finder_pattern(px, py);
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@ -77,14 +84,14 @@ CGPROGRAM
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&& (px < WIDTH - 13 || py > 12) // top right
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&& (py < WIDTH - 13 || px > 12) // bottom left
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) {
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uint x = px + ALIGNER_SPACING - 4 - MISALIGNMENT;
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uint y = py + ALIGNER_SPACING - 4 - MISALIGNMENT;
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if (px < 15) x += MISALIGNMENT;
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if (py < 15) y += MISALIGNMENT;
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uint ax = x % ALIGNER_SPACING;
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uint ay = y % ALIGNER_SPACING;
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if (ax < 5 && ay < 5) {
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return (ax < 4 && ax > 0 && ay < 4 && ay > 0 && !(ax == 2 && ay == 2));
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uint x = px + ALIGNER_SPACING - 4;
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uint y = py + ALIGNER_SPACING - 4;
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if (px > 12) x -= MISALIGNMENT;
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if (py > 12) y -= MISALIGNMENT;
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x %= ALIGNER_SPACING;
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y %= ALIGNER_SPACING;
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if (x < 5 && y < 5) {
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return (x < 4 && x > 0 && y < 4 && y > 0 && !(x == 2 && y == 2));
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}
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}
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@ -100,11 +107,38 @@ CGPROGRAM
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// bottom
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if (px == 8 && py > WIDTH - 8) return (FORMAT_BITS & (1 << py + 15 - WIDTH)) == 0;
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uint column = (WIDTH - px - (px > 6))/2;
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uint direction_up = column & 1;
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// data bit layout
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uint column = (WIDTH - px - (px < 6)-1)/2;
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uint direction_up = column % 2 == 0;
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uint full_columns = column > 4 ? column - 4 : 0;
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full_columns = min(full_columns, VERSION*2);
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// the 4 columns under the right finder
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uint short_columns = min(column, 4);
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// between the left two finder patterns
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uint tiny_columns = column > (VERSION*2 + 4) ? column - (VERSION*2 + 4) : 0;
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uint bit_index = full_columns * (WIDTH - 1) * 2;
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bit_index += short_columns * (WIDTH - 9) * 2;
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bit_index += tiny_columns * (WIDTH - 17) * 2;
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bit_index += (px + (px < 6)) % 2;
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if (direction_up) {
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bit_index += (WIDTH - py - 1 - (py < 7)) * 2;
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} else {// direction down
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const uint diff = (full_columns == 0) ? 9 : (py > 6);
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bit_index += (py - diff)*2;
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}
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if (px < 9) bit_index -= 16; // rightmost tiny column
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// debugging worm
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uint worm = abs(TIME % BIT_COUNT - bit_index);
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const uint length = 4;
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if (worm < length) return CYAN * (worm/(float)length);
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return (float)(bit_index%BIT_COUNT)/(float)BIT_COUNT;
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// return lerp(BLUE, PINK, column / (WIDTH/2.));
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return lerp(BLUE, PINK, (px+py)&1);
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// return float4((px/8 + py/8) & 1, (px/2 + py/2) & 1, (px/4 + py/4) & 1, 1);
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// return float3((px%5)/5., (px/10+py/10)&1, (py%5)/5.);
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// return float3((px/8 + py/8) & 1, (px/2 + py/2) & 1, (px/4 + py/4) & 1, 1);
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// return direction_up;
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return 0.5;
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}
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