test/scanTest3.c


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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

#include "libsldj/util.h"

uint8_t lastValue = 200;

// Rerendered noise.
#define VALUES_SIZE 65536
uint8_t values[VALUES_SIZE];

void loadContext(SldjContext context)
{   
    srandom(time(NULL));
    
    for (int i = 0; i < VALUES_SIZE; ++i)
    {
        values[i] = random() % 256;
    }
}

int s = 100;

Color lineScanner(uint16_t x, uint16_t y, uint32_t frameNumber)
{
    // Shifts around the noise to make it look better.
    uint8_t c = values[((x + (frameNumber >> 2)) + (y << 1)) % VALUES_SIZE];
    uint8_t b = frameNumber + SLDJ_HYPOT2(((x - 32768) >> 6), ((y - 32768) >> 6));
    
    return (Color){
        .r = (c + b) << 1,
        .g = b,
        .b = c,
        .a = 255
    };
}