119 lines
6.9 KiB
Plaintext
119 lines
6.9 KiB
Plaintext
{
|
|
"name": "fbm",
|
|
"node_position": {
|
|
"x": 0,
|
|
"y": 0
|
|
},
|
|
"parameters": {
|
|
"iterations": 6,
|
|
"noise": 0,
|
|
"persistence": 0.5,
|
|
"scale_x": 2,
|
|
"scale_y": 2
|
|
},
|
|
"shader_model": {
|
|
"code": "",
|
|
"global": "float fbm_value(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat p00 = rand(mod(o, size));\n\tfloat p01 = rand(mod(o + vec2(0.0, 1.0), size));\n\tfloat p10 = rand(mod(o + vec2(1.0, 0.0), size));\n\tfloat p11 = rand(mod(o + vec2(1.0, 1.0), size));\n\tvec2 t = f * f * (3.0 - 2.0 * f);\n\treturn mix(mix(p00, p10, t.x), mix(p01, p11, t.x), t.y);\n}\n\nfloat fbm_perlin(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat a00 = rand(mod(o, size)) * 6.28318530718;\n\tfloat a01 = rand(mod(o + vec2(0.0, 1.0), size)) * 6.28318530718;\n\tfloat a10 = rand(mod(o + vec2(1.0, 0.0), size)) * 6.28318530718;\n\tfloat a11 = rand(mod(o + vec2(1.0, 1.0), size)) * 6.28318530718;\n\tvec2 v00 = vec2(cos(a00), sin(a00));\n\tvec2 v01 = vec2(cos(a01), sin(a01));\n\tvec2 v10 = vec2(cos(a10), sin(a10));\n\tvec2 v11 = vec2(cos(a11), sin(a11));\n\tfloat p00 = dot(v00, f);\n\tfloat p01 = dot(v01, f - vec2(0.0, 1.0));\n\tfloat p10 = dot(v10, f - vec2(1.0, 0.0));\n\tfloat p11 = dot(v11, f - vec2(1.0, 1.0));\n\tvec2 t = f * f * (3.0 - 2.0 * f);\n\treturn 0.5 + mix(mix(p00, p10, t.x), mix(p01, p11, t.x), t.y);\n}\n\nfloat fbm_perlinabs(vec2 coord, vec2 size, float seed) {\n\treturn abs(2.0*fbm_perlin(coord, size, seed)-1.0);\n}\n\nfloat fbm_cellular(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat min_dist = 2.0;\n\tfor(float x = -1.0; x <= 1.0; x++) {\n\t\tfor(float y = -1.0; y <= 1.0; y++) {\n\t\t\tvec2 node = rand2(mod(o + vec2(x, y), size)) + vec2(x, y);\n\t\t\tfloat dist = sqrt((f - node).x * (f - node).x + (f - node).y * (f - node).y);\n\t\t\tmin_dist = min(min_dist, dist);\n\t\t}\n\t}\n\treturn min_dist;\n}\n\nfloat fbm_cellular2(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat min_dist1 = 2.0;\n\tfloat min_dist2 = 2.0;\n\tfor(float x = -1.0; x <= 1.0; x++) {\n\t\tfor(float y = -1.0; y <= 1.0; y++) {\n\t\t\tvec2 node = rand2(mod(o + vec2(x, y), size)) + vec2(x, y);\n\t\t\tfloat dist = sqrt((f - node).x * (f - node).x + (f - node).y * (f - node).y);\n\t\t\tif (min_dist1 > dist) {\n\t\t\t\tmin_dist2 = min_dist1;\n\t\t\t\tmin_dist1 = dist;\n\t\t\t} else if (min_dist2 > dist) {\n\t\t\t\tmin_dist2 = dist;\n\t\t\t}\n\t\t}\n\t}\n\treturn min_dist2-min_dist1;\n}\n\nfloat fbm_cellular3(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat min_dist = 2.0;\n\tfor(float x = -1.0; x <= 1.0; x++) {\n\t\tfor(float y = -1.0; y <= 1.0; y++) {\n\t\t\tvec2 node = rand2(mod(o + vec2(x, y), size))*0.5 + vec2(x, y);\n\t\t\tfloat dist = abs((f - node).x) + abs((f - node).y);\n\t\t\tmin_dist = min(min_dist, dist);\n\t\t}\n\t}\n\treturn min_dist;\n}\n\nfloat fbm_cellular4(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat min_dist1 = 2.0;\n\tfloat min_dist2 = 2.0;\n\tfor(float x = -1.0; x <= 1.0; x++) {\n\t\tfor(float y = -1.0; y <= 1.0; y++) {\n\t\t\tvec2 node = rand2(mod(o + vec2(x, y), size))*0.5 + vec2(x, y);\n\t\t\tfloat dist = abs((f - node).x) + abs((f - node).y);\n\t\t\tif (min_dist1 > dist) {\n\t\t\t\tmin_dist2 = min_dist1;\n\t\t\t\tmin_dist1 = dist;\n\t\t\t} else if (min_dist2 > dist) {\n\t\t\t\tmin_dist2 = dist;\n\t\t\t}\n\t\t}\n\t}\n\treturn min_dist2-min_dist1;\n}\n\nfloat fbm_cellular5(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat min_dist = 2.0;\n\tfor(float x = -1.0; x <= 1.0; x++) {\n\t\tfor(float y = -1.0; y <= 1.0; y++) {\n\t\t\tvec2 node = rand2(mod(o + vec2(x, y), size)) + vec2(x, y);\n\t\t\tfloat dist = max(abs((f - node).x), abs((f - node).y));\n\t\t\tmin_dist = min(min_dist, dist);\n\t\t}\n\t}\n\treturn min_dist;\n}\n\nfloat fbm_cellular6(vec2 coord, vec2 size, float seed) {\n\tvec2 o = floor(coord)+rand2(vec2(float(seed), 1.0-float(seed)))+size;\n\tvec2 f = fract(coord);\n\tfloat min_dist1 = 2.0;\n\tfloat min_dist2 = 2.0;\n\tfor(float x = -1.0; x <= 1.0; x++) {\n\t\tfor(float y = -1.0; y <= 1.0; y++) {\n\t\t\tvec2 node = rand2(mod(o + vec2(x, y), size)) + vec2(x, y);\n\t\t\tfloat dist = max(abs((f - node).x), abs((f - node).y));\n\t\t\tif (min_dist1 > dist) {\n\t\t\t\tmin_dist2 = min_dist1;\n\t\t\t\tmin_dist1 = dist;\n\t\t\t} else if (min_dist2 > dist) {\n\t\t\t\tmin_dist2 = dist;\n\t\t\t}\n\t\t}\n\t}\n\treturn min_dist2-min_dist1;\n}\n",
|
|
"includes": [
|
|
""
|
|
],
|
|
"inputs": [
|
|
|
|
],
|
|
"instance": "float $(name)_fbm(vec2 coord, vec2 size, int octaves, float persistence, float seed) {\n\tfloat normalize_factor = 0.0;\n\tfloat value = 0.0;\n\tfloat scale = 1.0;\n\tfor (int i = 0; i < octaves; i++) {\n\t\tvalue += fbm_$noise(coord*size, size, seed) * scale;\n\t\tnormalize_factor += scale;\n\t\tsize *= 2.0;\n\t\tscale *= persistence;\n\t}\n\treturn value / normalize_factor;\n}\n",
|
|
"name": "FBM",
|
|
"outputs": [
|
|
{
|
|
"f": "$(name)_fbm($(uv), vec2($(scale_x), $(scale_y)), int($(iterations)), $(persistence), float($(seed)))",
|
|
"type": "f"
|
|
}
|
|
],
|
|
"parameters": [
|
|
{
|
|
"default": 0,
|
|
"label": "Noise",
|
|
"name": "noise",
|
|
"type": "enum",
|
|
"values": [
|
|
{
|
|
"name": "Value",
|
|
"value": "value"
|
|
},
|
|
{
|
|
"name": "Perlin",
|
|
"value": "perlin"
|
|
},
|
|
{
|
|
"name": "Perlin abs",
|
|
"value": "perlinabs"
|
|
},
|
|
{
|
|
"name": "Cellular",
|
|
"value": "cellular"
|
|
},
|
|
{
|
|
"name": "Cellular2",
|
|
"value": "cellular2"
|
|
},
|
|
{
|
|
"name": "Cellular3",
|
|
"value": "cellular3"
|
|
},
|
|
{
|
|
"name": "Cellular4",
|
|
"value": "cellular4"
|
|
},
|
|
{
|
|
"name": "Cellular5",
|
|
"value": "cellular5"
|
|
},
|
|
{
|
|
"name": "Cellular6",
|
|
"value": "cellular6"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"control": "None",
|
|
"default": 4,
|
|
"label": "Scale X",
|
|
"max": 32,
|
|
"min": 1,
|
|
"name": "scale_x",
|
|
"step": 1,
|
|
"type": "float"
|
|
},
|
|
{
|
|
"control": "None",
|
|
"default": 4,
|
|
"label": "Scale Y",
|
|
"max": 32,
|
|
"min": 1,
|
|
"name": "scale_y",
|
|
"step": 1,
|
|
"type": "float"
|
|
},
|
|
{
|
|
"control": "None",
|
|
"default": 3,
|
|
"label": "Iterations",
|
|
"max": 10,
|
|
"min": 1,
|
|
"name": "iterations",
|
|
"step": 1,
|
|
"type": "float"
|
|
},
|
|
{
|
|
"control": "None",
|
|
"default": 0.5,
|
|
"label": "Persistence",
|
|
"max": 1,
|
|
"min": 0,
|
|
"name": "persistence",
|
|
"step": 0.01,
|
|
"type": "float"
|
|
}
|
|
]
|
|
},
|
|
"type": "shader"
|
|
} |