3D software rendering in Rust

engine
    graphics
    sound
    ...

engine
    graphics
    sound
    ...

void mainImage(out vec4 fragColor, in vec2 fragCoord) {
    vec2 iResolution = vec2(800.0, 450.0); // Set this to your desired resolution
    vec2 uv = fragCoord / iResolution;
    int x = int(fragCoord.x);
    int y = int(fragCoord.y);
    
    int TEXTURE_W = int(iResolution.x);
    int TEXTURE_H = int(iResolution.y);

    int l = 0x1FF >> min(min(min(min(x, y), TEXTURE_W - 1 - x), TEXTURE_H - 1 - y), 31);

    float fx = float(x);
    float fy = float(y);
    float fw = float(TEXTURE_W);
    float fh = float(TEXTURE_H);
    
    float hypot = pow(length(vec2(fx / (fw / 2.0) - 1.0, fy / (fh / 2.0) - 1.0) * 4.0), 2.0);
    int d = int(min(50.0, max(0.0, 255.0 - 50.0 * hypot)));

    int r = (~x & ~y) & 255;
    int g = (x & ~y) & 255;
    int b = (~x & y) & 255;

    float red = float(min(max(r - d, l), 255)) / 255.0;
    float green = float(min(max(g - d, l), 255)) / 255.0;
    float blue = float(min(max(b - d, l), 255)) / 255.0;

    fragColor = vec4(red, green, blue, 1.0);
}

void mainImage(out vec4 fragColor, in vec2 fragCoord) {
    vec2 iResolution = vec2(800.0, 450.0); // Set this to your desired resolution
    vec2 uv = fragCoord / iResolution;
    int x = int(fragCoord.x);
    int y = int(fragCoord.y);
    
    int TEXTURE_W = int(iResolution.x);
    int TEXTURE_H = int(iResolution.y);

    int l = 0x1FF >> min(min(min(min(x, y), TEXTURE_W - 1 - x), TEXTURE_H - 1 - y), 31);

    float fx = float(x);
    float fy = float(y);
    float fw = float(TEXTURE_W);
    float fh = float(TEXTURE_H);
    
    float hypot = pow(length(vec2(fx / (fw / 2.0) - 1.0, fy / (fh / 2.0) - 1.0) * 4.0), 2.0);
    int d = int(min(50.0, max(0.0, 255.0 - 50.0 * hypot)));

    int r = (~x & ~y) & 255;
    int g = (x & ~y) & 255;
    int b = (~x & y) & 255;

    float red = float(min(max(r - d, l), 255)) / 255.0;
    float green = float(min(max(g - d, l), 255)) / 255.0;
    float blue = float(min(max(b - d, l), 255)) / 255.0;

    fragColor = vec4(red, green, blue, 1.0);
}