generated from krampus/template-godot4
38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
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/* Gunk shader adapted to a canvas item */
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shader_type canvas_item;
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#include "common.gdshaderinc"
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uniform float aspect_ratio = 1.0;
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group_uniforms mask;
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uniform float mask_progress : hint_range(0.0, 1.0, 0.01) = 0.0;
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uniform sampler2D mask_noise : hint_default_white;
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void fragment() {
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vec2 scaled_pixellation = pixellation * vec2(1.0, aspect_ratio);
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float local_time = floor(TIME * time_scale * time_pixellation) / time_pixellation;
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vec2 local_uv = floor(UV * scaled_pixellation) / scaled_pixellation + local_time * pan_speed;
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// swirl
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vec3 uvt = vec3(local_uv.x, local_uv.y, local_time);
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uvt = swirl_uvt(uvt);
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float value = sample_noise(uvt);
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NORMAL_MAP = texture(gunk_noise, uvt).xyz;
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// Radial mask effect
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float radius = 1.3 * length(local_uv - 0.5);
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float offset = radius + texture(mask_noise, local_uv).r - 0.5;
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float mask = 1.0 - clamp(offset - 1.0 + 2.0 * mask_progress, 0.0, 1.0);
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// soften edges
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NORMAL_MAP *= smoothstep(1.0, 0.0, mask);
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vec3 color = base_albedo(UV, value) + base_emission(UV, value);
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float alpha = hardstep(1.0 - mask);
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COLOR = vec4(color, alpha);
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}
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