55 lines
2.1 KiB
Plaintext
55 lines
2.1 KiB
Plaintext
shader_type canvas_item;
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uniform vec2 screen_size = vec2(1920, 1080);
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uniform float SPIN_ROTATION = -2.0;
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uniform float SPIN_SPEED = 7.0;
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uniform vec2 OFFSET = vec2(0.0);
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uniform vec4 COLOUR_1: source_color = vec4(0.871, 0.267, 0.231, 1.0);
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uniform vec4 COLOUR_2: source_color = vec4(0.0, 0.42, 0.706, 1.0);
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uniform vec4 COLOUR_3: source_color = vec4(0.086, 0.137, 0.145, 1.0);
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uniform float CONTRAST = 3.5;
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uniform float LIGTHING = 0.4;
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uniform float SPIN_AMOUNT = 0.25;
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uniform float PIXEL_FILTER = 745.0;
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uniform float SPIN_EASE = 1.0;
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uniform bool IS_ROTATE = false;
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vec4 effect(vec2 screenSize, vec2 screen_coords) {
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float pixel_size = length(screenSize.xy) / PIXEL_FILTER;
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vec2 uv = (floor(screen_coords.xy*(1./pixel_size))*pixel_size - 0.5*screenSize.xy)/length(screenSize.xy) - OFFSET;
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float uv_len = length(uv);
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float speed = (SPIN_ROTATION*SPIN_EASE*0.2);
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if(IS_ROTATE){
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speed = TIME * speed;
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}
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speed += 302.2;
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float new_pixel_angle = atan(uv.y, uv.x) + speed - SPIN_EASE*20.*(1.*SPIN_AMOUNT*uv_len + (1. - 1.*SPIN_AMOUNT));
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vec2 mid = (screenSize.xy/length(screenSize.xy))/2.;
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uv = (vec2((uv_len * cos(new_pixel_angle) + mid.x), (uv_len * sin(new_pixel_angle) + mid.y)) - mid);
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uv *= 30.;
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speed = TIME*(SPIN_SPEED);
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vec2 uv2 = vec2(uv.x+uv.y);
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for(int i=0; i < 5; i++) {
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uv2 += sin(max(uv.x, uv.y)) + uv;
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uv += 0.5*vec2(cos(5.1123314 + 0.353*uv2.y + speed*0.131121),sin(uv2.x - 0.113*speed));
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uv -= 1.0*cos(uv.x + uv.y) - 1.0*sin(uv.x*0.711 - uv.y);
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}
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float contrast_mod = (0.25*CONTRAST + 0.5*SPIN_AMOUNT + 1.2);
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float paint_res = min(2., max(0.,length(uv)*(0.035)*contrast_mod));
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float c1p = max(0.,1. - contrast_mod*abs(1.-paint_res));
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float c2p = max(0.,1. - contrast_mod*abs(paint_res));
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float c3p = 1. - min(1., c1p + c2p);
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float light = (LIGTHING - 0.2)*max(c1p*5. - 4., 0.) + LIGTHING*max(c2p*5. - 4., 0.);
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return (0.3/CONTRAST)*COLOUR_1 + (1. - 0.3/CONTRAST)*(COLOUR_1*c1p + COLOUR_2*c2p + vec4(c3p*COLOUR_3.rgb, c3p*COLOUR_1.a)) + light;
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}
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void fragment() {
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COLOR = effect(screen_size, UV * screen_size);
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}
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