95 lines
2.8 KiB
Plaintext
95 lines
2.8 KiB
Plaintext
// TRANSLATED & MODIFIED FROM: https://www.shadertoy.com/view/4sX3Rs
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shader_type canvas_item;
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render_mode blend_mix;
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uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
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uniform vec2 sun_position = vec2(400.0, 0.0);
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uniform vec3 tint = vec3(1.4,1.2,1.0);
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uniform sampler2D noise_texture;
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float noise_float(float t, vec2 texResolution)
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{
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return texture(noise_texture,vec2(t,0.0)/texResolution).x;
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}
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float noise_vec2(vec2 t, vec2 texResolution)
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{
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return texture(noise_texture,t/texResolution).x;
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}
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vec3 lensflare(vec2 uv,vec2 pos, vec2 texResolution)
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{
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vec2 main = uv-pos;
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vec2 uvd = uv*(length(uv));
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float ang = atan(main.x,main.y);
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float dist = length(main);
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dist = pow(dist,0.1);
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float n = noise_vec2(vec2(ang*16.0,dist*32.0), texResolution);
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// Do not need an artificial sun
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//float f0 = 1.0/(length(uv-pos)*16.0+1.0);
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//f0 = f0 + f0*(sin(noise_float(sin(ang*2.+pos.x)*4.0 - cos(ang*3.+pos.y), texResolution)*16.)*.1 + dist*.1 + .8);
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float f1 = max(0.01-pow(length(uv+1.2*pos),1.9),.0)*7.0;
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float f2 = max(1.0/(1.0+32.0*pow(length(uvd+0.8*pos),2.0)),.0)*00.25;
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float f22 = max(1.0/(1.0+32.0*pow(length(uvd+0.85*pos),2.0)),.0)*00.23;
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float f23 = max(1.0/(1.0+32.0*pow(length(uvd+0.9*pos),2.0)),.0)*00.21;
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vec2 uvx = mix(uv,uvd,-0.5);
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float f4 = max(0.01-pow(length(uvx+0.4*pos),2.4),.0)*6.0;
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float f42 = max(0.01-pow(length(uvx+0.45*pos),2.4),.0)*5.0;
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float f43 = max(0.01-pow(length(uvx+0.5*pos),2.4),.0)*3.0;
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uvx = mix(uv,uvd,-.4);
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float f5 = max(0.01-pow(length(uvx+0.2*pos),5.5),.0)*2.0;
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float f52 = max(0.01-pow(length(uvx+0.4*pos),5.5),.0)*2.0;
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float f53 = max(0.01-pow(length(uvx+0.6*pos),5.5),.0)*2.0;
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uvx = mix(uv,uvd,-0.5);
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float f6 = max(0.01-pow(length(uvx-0.3*pos),1.6),.0)*6.0;
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float f62 = max(0.01-pow(length(uvx-0.325*pos),1.6),.0)*3.0;
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float f63 = max(0.01-pow(length(uvx-0.35*pos),1.6),.0)*5.0;
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vec3 c = vec3(.0);
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c.r+=f2+f4+f5+f6; c.g+=f22+f42+f52+f62; c.b+=f23+f43+f53+f63;
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c = c*1.3 - vec3(length(uvd)*.05);
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// Do not need an artificial sun
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//c+=vec3(f0);
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return c;
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}
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vec3 cc(vec3 color, float factor,float factor2) // color modifier
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{
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float w = color.x+color.y+color.z;
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return mix(color,vec3(w)*factor,w*factor2);
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}
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void fragment()
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{
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vec2 texResolution = 1.0 / TEXTURE_PIXEL_SIZE;
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vec2 resolution = 1.0 / SCREEN_PIXEL_SIZE;
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vec2 uv = FRAGCOORD.xy / resolution.xy - 0.5;
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uv.x *= resolution.x/resolution.y; //fix aspect ratio
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vec2 mouse = (sun_position.xy / resolution.xy) - vec2(0.5, 0.5);
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mouse.x *= resolution.x / resolution.y; //fix aspect ratio
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vec4 previousColor = texture(SCREEN_TEXTURE, SCREEN_UV);
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vec3 color = previousColor.rgb;
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color += tint * lensflare(uv, mouse.xy, texResolution);
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color -= noise_vec2(FRAGCOORD.xy, texResolution)*.015;
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color = cc(color,.5,.1);
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COLOR = vec4(color,1.0);
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} |