generated from krampus/template-godot4
69 lines
1.9 KiB
Plaintext
69 lines
1.9 KiB
Plaintext
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shader_type spatial;
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render_mode depth_prepass_alpha;
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#include "common.gdshaderinc"
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group_uniforms jitter;
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uniform mediump float jitter_magnitude = 0.0;
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uniform lowp float jitter_time_scale = 0.1;
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uniform highp sampler3D jitter_noise;
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group_uniforms inflation;
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uniform highp float vertex_inflation = 0.0;
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uniform highp float inflation_pixellation = 10.0;
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void vertex() {
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float mixer = VERTEX.x + 0.553 * VERTEX.z + 1.618 * VERTEX.y;
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float local_time = floor(TIME * jitter_time_scale * time_pixellation) / time_pixellation;
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float sample = texture(jitter_noise, vec3(cos(mixer), sin(mixer), local_time)).r;
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float inflation = floor(vertex_inflation * inflation_pixellation) / inflation_pixellation;
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float jitter = jitter_magnitude * (sample - 0.5 + inflation);
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VERTEX *= 1.0 + jitter;
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}
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float bump_sample(vec3 uvt, float dx, float dy) {
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vec2 offset = vec2(dx / pixellation, dy / pixellation);
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return texture(gunk_noise, uvt + vec3(offset, 0.0)).r;
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}
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void fragment() {
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vec3 uvt = scale_uvt(UV, TIME);
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float value = sample_noise(uvt);
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ALBEDO = base_albedo(UV, value);
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ROUGHNESS = base_roughness(value);
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EMISSION = base_emission(UV, value);
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SPECULAR = base_specular();
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// Build normal map from bump map
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float h_center = bump_sample(uvt, 0.0, 0.0);
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float h_right = bump_sample(uvt, 1.0, 0.0);
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float h_down = bump_sample(uvt, 0.0, 1.0);
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float dx = (h_center - h_right) * bump_strength;
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float dy = (h_center - h_down) * bump_strength;
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vec3 normal_diff_map = normalize(vec3(dx, dy, 1.0));
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NORMAL_MAP = normal_diff_map / 2.0 + 0.5;
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// add fresnel
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vec3 world_normal = mat3(TANGENT, BINORMAL, NORMAL) * normal_diff_map;
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EMISSION += rim_glow(
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world_normal,
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VIEW,
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fresnel_gradient,
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fresnel_color,
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fresnel_power,
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fresnel_intensity
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);
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// add iridescence
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ALBEDO += rim_glow(
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world_normal,
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VIEW,
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iridescence_gradient,
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iridescence_color,
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iridescence_power,
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iridescence_intensity
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);
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}
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