CrispyPin/cvr-props
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qr shader: determine bit order for size 1 (ignores aligners at larger sizes)

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Crispy 2024-08-17 14:24:02 +02:00
parent 16305cd3fc
commit d470f00987
3 changed files with 37 additions and 3 deletions
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2
Assets/test/QRCode.mat
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@ -77,7 +77,9 @@ Material:
- _SmoothnessTextureChannel: 0
- _SpecularHighlights: 1
- _SrcBlend: 1
- _TimeSlider: 0
- _UVSec: 0
- _Version: 1
- _ZWrite: 1
m_Colors:
- _Color: {r: 1, g: 1, b: 1, a: 1}

36
Assets/test/QRCode.shader
View file

@ -3,6 +3,7 @@ Properties {
[HideInInspector]
_("",2D)=""{}
_Version("Version", Range(1, 40)) = 1
_TimeSlider("Time", Range(0, 250)) = 0
}
SubShader {
Tags { "RenderType"="Opaque" }
@ -11,6 +12,7 @@ CGPROGRAM
#pragma surface s Standard
struct Input{float2 uv_;};
uint _Version;
float _TimeSlider;
#define VERSION _Version
#define WIDTH (17 + VERSION * 4)
@ -20,6 +22,9 @@ CGPROGRAM
#define ALIGNER_SPACING_IDEAL ((WIDTH - 13) / (ALIGNERS-1))
#define ALIGNER_SPACING (ALIGNER_SPACING_IDEAL + ALIGNER_SPACING_IDEAL % 2)
#define MISALIGNMENT ((WIDTH - 13) - ALIGNER_SPACING * ALIGNERS)
#define BIT_COUNT (WIDTH * WIDTH - 225 - (WIDTH - 17)*2)
#define TIME (_Time.y*24)
// #define TIME (uint)(_TimeSlider)
#define EC_LEVEL_L 1
#define EC_LEVEL_M 0
@ -44,6 +49,7 @@ CGPROGRAM
#define BLACK 0
#define PINK float3(1, .3, .5)
#define BLUE float3(0, .4, .7)
#define CYAN float3(0,1,1)
float3 finder_pattern(uint x, uint y) {
if (x < 6 && x > 0 && y < 6 && y > 0) return !(x < 5 && x > 1 && y < 5 && y > 1);
@ -101,8 +107,34 @@ CGPROGRAM
// bottom
if (px == 8 && py > WIDTH - 8) return (FORMAT_BITS & (1 << py + 15 - WIDTH)) == 0;
uint column = (WIDTH - px - (px > 6))/2;
uint direction_up = column & 1;
// data bit layout
uint column = (WIDTH - px - (px < 6)-1)/2;
uint direction_up = column % 2 == 0;
uint full_columns = column > 4 ? column - 4 : 0;
full_columns = min(full_columns, VERSION*2);
// the 4 columns under the right finder
uint short_columns = min(column, 4);
// between the left two finder patterns
uint tiny_columns = column > (VERSION*2 + 4) ? column - (VERSION*2 + 4) : 0;
uint bit_index = full_columns * (WIDTH - 1) * 2;
bit_index += short_columns * (WIDTH - 9) * 2;
bit_index += tiny_columns * (WIDTH - 17) * 2;
bit_index += (px + (px < 6)) % 2;
if (direction_up) {
bit_index += (WIDTH - py - 1 - (py < 7)) * 2;
} else {// direction down
const uint diff = (full_columns == 0) ? 9 : (py > 6);
bit_index += (py - diff)*2;
}
if (px < 9) bit_index -= 16; // rightmost tiny column
// debugging worm
uint worm = abs(TIME % BIT_COUNT - bit_index);
const uint length = 4;
if (worm < length) return CYAN * (worm/(float)length);
return (float)(bit_index%BIT_COUNT)/(float)BIT_COUNT;
// return lerp(BLUE, PINK, column / (WIDTH/2.));
return lerp(BLUE, PINK, (px+py)&1);
// return float3((px%5)/5., (px/10+py/10)&1, (py%5)/5.);

2
Assets/test/TestProps.unity
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@ -1360,7 +1360,7 @@ Transform:
m_PrefabAsset: {fileID: 0}
m_GameObject: {fileID: 1500710831}
m_LocalRotation: {x: 0, y: 1, z: 0, w: 0}
m_LocalPosition: {x: 0, y: 0.45, z: 1}
m_LocalPosition: {x: 0, y: 1, z: 1}
m_LocalScale: {x: 1, y: 1, z: 1}
m_ConstrainProportionsScale: 0
m_Children: []