qr code wip

This commit is contained in:
Crispy 2024-08-16 10:06:39 +02:00
parent feecf5f101
commit f6f7c03c14
5 changed files with 361 additions and 3 deletions

85
Assets/test/QRCode.mat Normal file
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99
Assets/test/QRCode.shader Normal file
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Shader "CrispyPin/QRCode" {
Properties {
[HideInInspector]
_("",2D)=""
_Version("Version", Integer) = 1
}
SubShader {
Tags { "RenderType"="Opaque" }
LOD 100
CGPROGRAM
#pragma surface s Standard
struct Input{float2 uv_;};
uint _Version;
// #define VERSION 15
#define VERSION _Version
#define WIDTH (21 + (VERSION-1)*4)
#define ALIGNERS ((VERSION / 7) + 2)
#define ALIGNER_SPACING ((WIDTH - 8 - 5) / (ALIGNERS-1))
#define MISALIGNMENT ((WIDTH - 13) % (ALIGNERS-1))
/*
v = 15
width = 77
aligners = 4
spacing = (77-13)/3
*/
#define WHITE 1
#define BLACK 0
#define PINK float4(1, .3, .5, 1)
float4 finder_pattern(uint x, uint y) {
if (x < 6 && x > 0 && y < 6 && y > 0) return !(x < 5 && x > 1 && y < 5 && y > 1);
return (x > 6 || y > 6);
}
float4 main (float2 uv){
const uint data[] = {0x68656c6c,0x6f20776f,0x726c6421};
uv.y = 1 - uv.y;
uv = uv * 1.5 - 0.25;
// Quiet zone
if (uv.x < 0 || uv.x > 1 || uv.y < 0 || uv.y > 1) return 1;
uint px = uv.x * WIDTH;
uint py = uv.y * WIDTH;
// Finder patterns
if (px < 8 && py < 8) return finder_pattern(px, py);
if (px < 8 && py > WIDTH - 9) return finder_pattern(px, py - WIDTH + 7);
if (px > WIDTH - 9 && py < 8) return finder_pattern(px - WIDTH + 7, py);
// Timing patterns
if (px == 6) return py & 1;
if (py == 6) return px & 1;
// Aligners
if (VERSION > 1
&& (px > 8 || py > 8) // top left
&& (px < WIDTH - 9 || py > 8) // top right
&& (py < WIDTH - 9 || px > 8) // bottom left
) {
// if (MISALIGNMENT != 0) return PINK;
uint x = px + ALIGNER_SPACING - 4;// - MISALIGNMENT;
uint y = py + ALIGNER_SPACING - 4;// - MISALIGNMENT;
// if (px > WIDTH-15) x -= MISALIGNMENT;
// if (py > WIDTH-15) y -= MISALIGNMENT;
// if (px < 10) {
// x += MISALIGNMENT;
// }
// if (py < 10) {
// y += MISALIGNMENT;
// }
uint ax = x % ALIGNER_SPACING;
uint ay = y % ALIGNER_SPACING;
if (ax < 5 && ay < 5){
// return PINK;
// return (ax|ay) & 1;
return (ax < 4 && ax > 0 && ay < 4 && ay > 0 && !(ax == 2 && ay == 2));
}
}
// Format bits
if (px == 8 && (py < 9 || py > WIDTH - 9)) return 0.8;
if (py == 8 && (px < 9 || px > WIDTH - 9)) return 0.8;
uint column = (WIDTH - px - (px > 6))/2;
uint direction_up = column & 1;
return column / 10.;
// return direction_up;
return 0.5;
}
void s (Input IN, inout SurfaceOutputStandard o) {o.Albedo = main(IN.uv_); }
ENDCG
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