70 lines
2.2 KiB
Plaintext
70 lines
2.2 KiB
Plaintext
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//based on https://godotshaders.com/shader/crt-shader-2/
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shader_type canvas_item;
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uniform sampler2D screen_texture : hint_screen_texture, repeat_disable, filter_nearest;
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uniform float fisheye_strength = 1.0; // Adjust this to control the fisheye effect strength
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vec2 fisheye(vec2 uv) {
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vec2 d = uv - 0.5;
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float r = length(d);
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float theta = atan(d.y, d.x);
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float rf = pow(r, fisheye_strength) / pow(0.5, fisheye_strength - 1.0);
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return vec2(0.5) + rf * normalize(d);
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}
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vec2 curve(vec2 uv)
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{
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uv = (uv - 0.5) * 2.0;
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uv *= 1.1;
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uv.x *= 1.0 + pow((abs(uv.y) / 5.0), 2.0);
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uv.y *= 1.0 + pow((abs(uv.x) / 4.0), 2.0);
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uv = (uv / 2.0) + 0.5;
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uv = uv *0.92 + 0.04;
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return uv;
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}
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void fragment() {
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vec2 iResolution = 1.0 / SCREEN_PIXEL_SIZE;
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vec2 q = FRAGCOORD.xy / iResolution.xy;
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// Apply fisheye distortion
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q = fisheye(q);
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vec2 uv = curve(q);
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uv = curve( uv );
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vec3 oricol = texture( screen_texture, vec2(q.x,q.y) ).xyz;
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vec3 col;
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float x = sin(0.3*TIME+uv.y*21.0)*sin(0.7*TIME+uv.y*29.0)*sin(0.3+0.33*TIME+uv.y*31.0)*0.0017;
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col.r = texture(screen_texture,vec2(x+uv.x+0.001,uv.y+0.001)).x+0.05;
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col.g = texture(screen_texture,vec2(x+uv.x+0.000,uv.y-0.002)).y+0.05;
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col.b = texture(screen_texture,vec2(x+uv.x-0.002,uv.y+0.000)).z+0.05;
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col.r += 0.08*texture(screen_texture,0.75*vec2(x+0.025, -0.027)+vec2(uv.x+0.001,uv.y+0.001)).x;
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col.g += 0.05*texture(screen_texture,0.75*vec2(x+-0.022, -0.02)+vec2(uv.x+0.000,uv.y-0.002)).y;
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col.b += 0.08*texture(screen_texture,0.75*vec2(x+-0.02, -0.018)+vec2(uv.x-0.002,uv.y+0.000)).z;
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col = clamp(col*0.6+0.4*col*col*1.0,0.0,1.0);
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float vig = (0.0 + 1.0*16.0*uv.x*uv.y*(1.0-uv.x)*(1.0-uv.y));
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col *= vec3(pow(vig,0.3));
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col *= vec3(0.95,1.05,0.95);
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col *= 2.8;
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float scans = clamp( 0.35+0.35*sin(3.5*TIME+uv.y*iResolution.y*1.5), 0.0, 1.0);
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float s = pow(scans,1.7);
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col = col*vec3( 0.4+0.7*s) ;
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col *= 1.0+0.01*sin(110.0*TIME);
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if (uv.x < 0.0 || uv.x > 1.0)
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col *= 0.0;
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if (uv.y < 0.0 || uv.y > 1.0)
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col *= 0.0;
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col*=1.0-0.65*vec3(clamp((mod(FRAGCOORD.x, 2.0)-1.0)*2.0,0.0,1.0));
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float comp = smoothstep( 0.1, 0.9, sin(TIME) );
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COLOR = vec4(col,1.0);
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}
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