28 lines
1.2 KiB
Plaintext
28 lines
1.2 KiB
Plaintext
shader_type canvas_item;
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render_mode unshaded;
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uniform vec4 plume_color : source_color = vec4(0.1,0.65,1.0,1.0);
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uniform float power = 0.0;
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uniform float boost = 0.0;
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uniform float phase = 0.0;
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float hash(vec2 p) { p=fract(p*vec2(123.34,456.21)); p+=dot(p,p+45.32); return fract(p.x*p.y); }
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float noise(vec2 p) {
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vec2 i=floor(p),f=fract(p); f=f*f*(3.0-2.0*f);
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return mix(mix(hash(i),hash(i+vec2(1,0)),f.x),mix(hash(i+vec2(0,1)),hash(i+vec2(1)),f.x),f.y);
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}
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void fragment() {
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float y=UV.y;
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float length=mix(0.30,0.85,boost)*(0.55+power*0.45);
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float travel=y/max(length,0.01);
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float turbulence=noise(vec2(y*18.0-TIME*24.0,phase+TIME*2.0));
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float width=max(0.018,0.33*pow(max(0.0,1.0-travel),0.65));
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float center=0.5+(turbulence-0.5)*0.11*travel;
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float dist=abs(UV.x-center);
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float body=1.0-smoothstep(width*0.22,width,dist);
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float end=1.0-smoothstep(0.65,1.0,travel);
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float core=exp(-dist*dist/max(0.0001,width*width*0.045))*(1.0-smoothstep(0.15,0.65,travel));
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float diamonds=pow(max(0.0,cos(travel*33.0-TIME*7.0)),6.0)*boost*0.22;
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vec3 color=mix(plume_color.rgb,vec3(0.8,0.95,1.0),core*0.9+diamonds);
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float halo=exp(-dist*dist*18.0)*exp(-y*7.0)*0.13;
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COLOR=vec4(color,(body*end*(0.62+turbulence*0.22)+halo)*power);
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}
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