499 lines
16 KiB
GLSL
499 lines
16 KiB
GLSL
// https://www.shadertoy.com/view/XsBSDm
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float g_cw = 15.; // char width in normalized units
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float g_ch = 30.; // char height in normalized units
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float g_cwb = .6; // character width buffer as a percentage of char width
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float g_chb = .5; // line buffer as a percentage of char height
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// vertical segment with the bottom of the segment being s
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// and having length d
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float vd( vec2 s, float d, vec2 uv )
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{
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float t = (d * (uv.y - s.y)) / (d*d);
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t = clamp(t, 0., 1.);
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return .1 * length((s + t * vec2(0., d)) - uv);
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}
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// horizontal segment with the left of the segment being s
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// and having length d
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float hd( vec2 s, float d, vec2 uv )
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{
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float t = (d * (uv.x - s.x)) / (d*d);
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t = clamp(t, 0., 1.);
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return .1 * length((s + t * vec2(d, 0.)) - uv);
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}
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// divide the experience into cells.
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vec2 mod_uv(vec2 uv)
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{
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return vec2(mod(uv.x, g_cw * (1. + g_cwb)),
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mod(uv.y, g_ch * (1. + g_chb)));
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}
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// ---------------------------------------------
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// ALPHABET
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float a(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch * .9, uv);
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r = min(r, hd(vec2(g_cw * .1, g_ch), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, 0.), g_ch * .9, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw, uv));
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return r;
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}
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float b(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, hd(vec2(.0, g_ch), g_cw, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .7), g_ch * .3, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, 0.), g_ch * .5, uv));
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r = min(r, hd(vec2(0.), g_cw, uv));
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return r;
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}
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float c(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .1), g_ch * .8, uv);
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .9, uv));
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r = min(r, hd(vec2(g_cw * .1, g_ch), g_cw * .9, uv));
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return r;
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}
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float d(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .8, uv));
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r = min(r, hd(vec2(0.), g_cw * .9, uv));
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r = min(r, hd(vec2(.0, g_ch), g_cw * .9, uv));
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return r;
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}
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float e(vec2 uv)
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{
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float r = hd(vec2(.0, g_ch), g_cw, uv);
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r = min(r, vd(vec2(0.), g_ch, uv));
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r = min(r, hd(vec2(0.), g_cw, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw * .8, uv));
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return r;
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}
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float f(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), g_cw, uv);
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r = min(r, vd(vec2(0.), g_ch, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw * .8, uv));
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return r;
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}
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float g(vec2 uv)
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{
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float r = hd(vec2(g_cw * .1, g_ch), g_cw * .8, uv);
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r = min(r, vd(vec2(0., g_ch * .1), g_ch * .8, uv));
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, .1 * g_ch), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .5, g_ch * .6), g_cw * .4, uv));
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return r;
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}
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float h(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, vd(vec2(g_cw, 0.), g_ch, uv));
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r = min(r, hd(vec2(.0, g_ch * .6), g_cw, uv));
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return r;
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}
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float i(vec2 uv)
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{
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float r = hd(vec2(0.), g_cw, uv);
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r = min(r, vd(vec2(g_cw * .5, 0.), g_ch, uv));
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r = min(r, hd(vec2(0., g_ch), g_cw, uv));
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return r;
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}
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float j(vec2 uv)
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{
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float r = vd(vec2(g_cw, g_ch * .1), g_ch * .9, uv);
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
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r = min(r, vd(vec2(0., g_ch * .1), g_ch * .2, uv));
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return r;
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}
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float k(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, vd(vec2(g_cw, g_ch*.7), g_ch * .3, uv));
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r = min(r, vd(vec2(g_cw, 0.), g_ch * .5, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw * .8, uv));
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return r;
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}
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float l(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, hd(vec2(0.), g_cw, uv));
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return r;
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}
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float m(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, vd(vec2(g_cw, 0.), g_ch, uv));
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r = min(r, hd(vec2(0., g_ch), g_cw * .3, uv));
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r = min(r, vd(vec2(g_cw * .5, g_ch * .6), .3 * g_ch, uv));
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r = min(r, hd(vec2(g_cw * .7, g_ch), g_cw * .3, uv));
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return r;
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}
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float n(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, vd(vec2(g_cw, 0.), g_ch, uv));
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r = min(r, vd(vec2(g_cw * .1, g_ch * .9), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .3, g_ch * .7), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .5, g_ch * .5), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .7, g_ch * .3), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .9, 0.), g_ch * .2, uv));
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return r;
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}
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float o(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .1), g_ch * .8, uv);
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r = min(r, hd(vec2(g_cw * .1, g_ch), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .8, uv));
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
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return r;
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}
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float p(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, hd(vec2(0., g_ch), g_cw, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .7), g_ch * .3, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw * .8, uv));
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return r;
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}
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float q(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .1), g_ch * .8, uv);
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r = min(r, hd(vec2(g_cw * .1, g_ch), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .8, uv));
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw * .7, g_ch * -.05), g_cw * .4, uv));
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return r;
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}
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float r(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, hd(vec2(.0, g_ch), g_cw, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .7), g_ch * .3, uv));
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r = min(r, hd(vec2(0., g_ch * .6), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, 0.), g_ch * .5, uv));
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return r;
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}
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float s(vec2 uv)
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{
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float r = hd(vec2(0.), g_cw * .9, uv);
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch * .6), g_cw * .7, uv));
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r = min(r, vd(vec2(0., g_ch * .7), g_ch * .2, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch), g_cw * .8, uv));
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return r;
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}
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float t(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), g_cw, uv);
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r = min(r, vd(vec2(g_cw * .5, 0.), g_ch, uv));
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return r;
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}
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float u(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .1), g_ch * .9, uv);
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .9, uv));
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return r;
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}
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float v(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .5), g_ch * .5, uv);
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r = min(r, vd(vec2(g_cw, g_ch * .5), g_ch * .5, uv));
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r = min(r, vd(vec2(g_cw * .2, g_ch * .2), g_ch * .2, uv));
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r = min(r, vd(vec2(g_cw * .8, g_ch * .2), g_ch * .2, uv));
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r = min(r, vd(vec2(g_cw * .5, 0.), g_ch * .1, uv));
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return r;
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}
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float w(vec2 uv)
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{
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float r = vd(vec2(0.), g_ch, uv);
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r = min(r, vd(vec2(g_cw, 0.), g_ch, uv));
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r = min(r, vd(vec2(g_cw * .5, g_ch * .1), g_ch * .3, uv));
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r = min(r, hd(vec2(0.), g_cw * .3, uv));
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r = min(r, hd(vec2(g_cw * .7, 0.), g_cw * .3, uv));
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return r;
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}
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float x(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .9), g_ch * .1, uv);
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r = min(r, vd(vec2(g_cw * .2, g_ch * .7), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .5, g_ch * .5), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .8, g_ch * .3), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw, 0.), g_ch * .2, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .9), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .8, g_ch * .7), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .2, g_ch * .3), g_ch * .1, uv));
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r = min(r, vd(vec2(0.), g_ch * .2, uv));
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return r;
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}
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float y(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .8), g_ch * .2, uv);
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r = min(r, vd(vec2(g_cw * .2, g_ch * .6), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .8, g_ch * .6), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .8), g_ch * .2, uv));
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r = min(r, vd(vec2(g_cw * .5, 0.), g_ch * .5, uv));
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return r;
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}
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float z(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), g_cw, uv);
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r = min(r, vd(vec2(g_cw * .9, g_ch * .9), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .7, g_ch * .7), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .5, g_ch * .5), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .3, g_ch * .3), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .1, g_ch * .1), g_ch * .1, uv));
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r = min(r, hd(vec2(0.), g_cw, uv));
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return r;
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}
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// ---------------------------------------------
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// NUMBERS
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float n1(vec2 uv)
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{
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float r = hd(vec2(g_cw * .3, g_ch), g_cw * .2, uv);
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r = min(r, vd(vec2(g_cw * .5, 0.) , g_ch, uv));
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return r;
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}
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float n2(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), .9 * g_cw, uv);
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r = min(r, vd(vec2(g_cw, g_ch*.7), g_ch * .2, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch * .6), g_cw * .7, uv));
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r = min(r, vd(vec2(0.), g_ch * .5, uv));
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r = min(r, hd(vec2(0.), g_cw * .9, uv));
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return r;
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}
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float n3(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), .9 * g_cw, uv);
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch * .6), g_cw * .7, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .7), g_ch * .2, uv));
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r = min(r, hd(vec2(0.), g_cw * .9, uv));
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return r;
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}
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float n4(vec2 uv)
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{
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float r = vd(vec2(0., g_ch * .6), g_ch * .4, uv);
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r = min(r, hd(vec2(.0, g_ch * .6), g_cw, uv));
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r = min(r, vd(vec2(g_cw, 0.), g_ch, uv));
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return r;
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}
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float n5(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), g_cw, uv);
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r = min(r, vd(vec2(0., g_ch*.6), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .1, g_ch * .6), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .4, uv));
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r = min(r, hd(vec2(0.), g_cw * .9, uv));
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return r;
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}
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float n6(vec2 uv)
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{
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float r = hd(vec2(g_cw * .1, g_ch), g_cw * .9, uv);
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r = min(r, vd(vec2(0., g_ch * .1), g_ch * .8, uv));
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r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch * .6), g_cw * .7, uv));
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return r;
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}
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float n7(vec2 uv)
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{
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float r = hd(vec2(0., g_ch), g_cw, uv);
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r = min(r, vd(vec2(g_cw * .9, g_ch * .9), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .7, g_ch * .7), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .5, g_ch * .5), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .3, g_ch * .3), g_ch * .1, uv));
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r = min(r, vd(vec2(g_cw * .1, 0.), g_ch * .2, uv));
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return r;
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}
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float n8(vec2 uv)
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{
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float r = hd(vec2(g_cw * .1, 0.), g_cw * .8, uv);
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch * .6), g_cw * .7, uv));
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r = min(r, vd(vec2(0., g_ch * .1), g_ch * .4, uv));
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r = min(r, hd(vec2(g_cw * .1, g_ch), .8 * g_cw, uv));
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r = min(r, vd(vec2(0., g_ch * .7), g_ch * .2, uv));
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r = min(r, vd(vec2(g_cw, g_ch * .7), g_ch * .2, uv));
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return r;
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}
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float n9(vec2 uv)
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{
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float r = hd(vec2(g_cw * .1, 0.), g_cw * .8, uv);
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r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .8, uv));
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r = min(r, hd(vec2(g_cw * .2, g_ch * .6), g_cw * .6, uv));
|
|
r = min(r, hd(vec2(g_cw * .1, g_ch), g_cw * .8, uv));
|
|
r = min(r, vd(vec2(0., g_ch * .7), g_ch * .2, uv));
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|
return r;
|
|
}
|
|
float n0(vec2 uv)
|
|
{
|
|
float r = vd(vec2(0., g_ch * .1), g_ch * .8, uv);
|
|
r = min(r, hd(vec2(g_cw * .1, g_ch), g_cw * .8, uv));
|
|
r = min(r, vd(vec2(g_cw, g_ch * .1), g_ch * .8, uv));
|
|
r = min(r, hd(vec2(g_cw * .1, 0.), g_cw * .8, uv));
|
|
|
|
r = min(r, vd(vec2(g_cw * .9, g_ch * .9), g_ch * .1, uv));
|
|
r = min(r, vd(vec2(g_cw * .7, g_ch * .7), g_ch * .1, uv));
|
|
r = min(r, vd(vec2(g_cw * .5, g_ch * .5), g_ch * .1, uv));
|
|
r = min(r, vd(vec2(g_cw * .3, g_ch * .3), g_ch * .1, uv));
|
|
r = min(r, vd(vec2(g_cw * .1, g_ch * .1), g_ch * .1, uv));
|
|
|
|
return r;
|
|
}
|
|
|
|
// ---------------------------------------------
|
|
// SPECIAL CHARACTERS
|
|
|
|
float pe(vec2 uv) // period
|
|
{
|
|
float r = vd(vec2(0.), g_ch * .02, uv);
|
|
|
|
return r;
|
|
}
|
|
|
|
// ---------------------------------------------
|
|
// MACROS
|
|
|
|
#define A if (cs == idx) { tx = min(tx, a(uv)); } idx++;
|
|
#define B if (cs == idx) { tx = min(tx, b(uv)); } idx++;
|
|
#define C if (cs == idx) { tx = min(tx, c(uv)); } idx++;
|
|
#define D if (cs == idx) { tx = min(tx, d(uv)); } idx++;
|
|
#define E if (cs == idx) { tx = min(tx, e(uv)); } idx++;
|
|
#define F if (cs == idx) { tx = min(tx, f(uv)); } idx++;
|
|
#define G if (cs == idx) { tx = min(tx, g(uv)); } idx++;
|
|
#define H if (cs == idx) { tx = min(tx, h(uv)); } idx++;
|
|
#define I if (cs == idx) { tx = min(tx, i(uv)); } idx++;
|
|
#define J if (cs == idx) { tx = min(tx, j(uv)); } idx++;
|
|
#define K if (cs == idx) { tx = min(tx, k(uv)); } idx++;
|
|
#define L if (cs == idx) { tx = min(tx, l(uv)); } idx++;
|
|
#define M if (cs == idx) { tx = min(tx, m(uv)); } idx++;
|
|
#define N if (cs == idx) { tx = min(tx, n(uv)); } idx++;
|
|
#define O if (cs == idx) { tx = min(tx, o(uv)); } idx++;
|
|
#define P if (cs == idx) { tx = min(tx, p(uv)); } idx++;
|
|
#define Q if (cs == idx) { tx = min(tx, q(uv)); } idx++;
|
|
#define R if (cs == idx) { tx = min(tx, r(uv)); } idx++;
|
|
#define S if (cs == idx) { tx = min(tx, s(uv)); } idx++;
|
|
#define T if (cs == idx) { tx = min(tx, t(uv)); } idx++;
|
|
#define U if (cs == idx) { tx = min(tx, u(uv)); } idx++;
|
|
#define V if (cs == idx) { tx = min(tx, v(uv)); } idx++;
|
|
#define W if (cs == idx) { tx = min(tx, w(uv)); } idx++;
|
|
#define X if (cs == idx) { tx = min(tx, x(uv)); } idx++;
|
|
#define Y if (cs == idx) { tx = min(tx, y(uv)); } idx++;
|
|
#define Z if (cs == idx) { tx = min(tx, z(uv)); } idx++;
|
|
#define N1 if (cs == idx) { tx = min(tx, n1(uv)); } idx++;
|
|
#define N2 if (cs == idx) { tx = min(tx, n2(uv)); } idx++;
|
|
#define N3 if (cs == idx) { tx = min(tx, n3(uv)); } idx++;
|
|
#define N4 if (cs == idx) { tx = min(tx, n4(uv)); } idx++;
|
|
#define N5 if (cs == idx) { tx = min(tx, n5(uv)); } idx++;
|
|
#define N6 if (cs == idx) { tx = min(tx, n6(uv)); } idx++;
|
|
#define N7 if (cs == idx) { tx = min(tx, n7(uv)); } idx++;
|
|
#define N8 if (cs == idx) { tx = min(tx, n8(uv)); } idx++;
|
|
#define N9 if (cs == idx) { tx = min(tx, n9(uv)); } idx++;
|
|
#define N0 if (cs == idx) { tx = min(tx, n0(uv)); } idx++;
|
|
#define PE if (cs == idx) { tx = min(tx, pe(uv)); } idx++;
|
|
#define SP idx++;
|
|
#define NL idx+=int(cc - mod(float(idx), cc));
|
|
|
|
// ---------------------------------------------
|
|
|
|
|
|
// Periodic saw tooth function that repeats with a period of
|
|
// 4 and ranges from [-1, 1].
|
|
// The function starts out at 0 for x=0,
|
|
// raises to 1 for x=1,
|
|
// drops to 0 for x=2,
|
|
// continues to -1 for x=3,
|
|
// and then rises back to 0 for x=4
|
|
// to complete the period
|
|
|
|
float sawtooth( float x )
|
|
{
|
|
float xmod = mod(x+3.0, 4.);
|
|
return abs(xmod-2.0) - 1.;
|
|
}
|
|
|
|
void mainImage( out vec4 fragColor, in vec2 fragCoord )
|
|
{
|
|
|
|
float display_width = 1010.;
|
|
float cc = floor(display_width / (g_cw * (1. + g_cwb))); // character count per line
|
|
|
|
vec2 uv = (fragCoord.xy) / iResolution.xx;
|
|
uv.y = iResolution.y/iResolution.x - uv.y; // type from top to bottom, left to right
|
|
uv *= display_width;
|
|
|
|
int cs = int(floor(uv.x / (g_cw * (1. + g_cwb))) + cc * floor(uv.y/(g_ch * (1. + g_chb))));
|
|
|
|
uv = mod_uv(uv);
|
|
uv.y = g_ch * (1. + g_chb) - uv.y; // paint the character from the bottom left corner
|
|
vec3 ccol = .35 * vec3(.1, .3, .2) * max(smoothstep(3., 0., uv.x), smoothstep(5., 0., uv.y));
|
|
uv -= vec2(g_cw * g_cwb * .5, g_ch * g_chb * .5);
|
|
|
|
float tx = 10000.;
|
|
int idx = 0;
|
|
|
|
//A B C D E F G H I J K L M N O P Q R S T U V W X Y Z N1 N2 N3 N4 N5 N6 N7 N8 N9 N0 PE NL
|
|
|
|
NL
|
|
NL
|
|
SP I N SP T H E SP N O T SP T O O SP D I S T A N T SP F U T U R E NL
|
|
SP W A Y SP D O W N SP I N SP D E E P SP N1 N3 NL
|
|
SP D R PE SP F O R R E S T E R SP A N D SP T V S SP F R A N K NL
|
|
SP W E R E SP H A T C H I N G SP A N SP E V I L SP S C H E M E PE NL
|
|
SP T H E Y SP H I R E D SP A SP T E M P SP B Y SP T H E SP N A M E SP O F SP M I K E NL
|
|
SP J U S T SP A SP R E G U L A R SP J O E SP T H E Y SP D I D N T SP L I K E PE NL
|
|
SP T H E I R SP E X P E R I M E N T SP N E E D E D SP A SP G O O D SP T E S T SP C A S E NL
|
|
SP S O SP T H E Y SP C O N K E D SP H I M SP O N SP T H E SP N O G G I N NL
|
|
SP A N D SP T H E Y SP S H O T SP H I M SP I N T O SP S P A C E SP PE PE PE
|
|
|
|
float throb = .4 + .2 * (.5 * sin(4. * iGlobalTime - .05 * float(cs)) + .5);
|
|
vec3 tcol = vec3(.7, 1., .8) * smoothstep(.2, .0, tx);
|
|
vec3 tglow = vec3(.7, 1., .8) * (.3 * throb + .7 * mix(.6, 1., throb) * smoothstep(throb, .1, tx));
|
|
|
|
vec3 terminal_color = ccol + tcol + tglow;
|
|
vec3 simple_color = vec3(max(0., 1. - tx));
|
|
float trans = smoothstep(-.1, .1, sawtooth(.3 * iGlobalTime - 1.));
|
|
|
|
fragColor = vec4(mix(terminal_color, simple_color, trans), 1.0);
|
|
|
|
} |