File size: 19,067 Bytes
ae81f33 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 |
/******************************************************************************
* Copyright 2024 NVIDIA Corporation. All rights reserved.
******************************************************************************
Permission is hereby granted by NVIDIA Corporation ("NVIDIA"), free of charge,
to any person obtaining a copy of the sample definition code that uses our
Material Definition Language (the "MDL Materials"), to reproduce and distribute
the MDL Materials, including without limitation the rights to use, copy, merge,
publish, distribute, and sell modified and unmodified copies of the MDL
Materials, and to permit persons to whom the MDL Materials is furnished to do
so, in all cases solely for use with NVIDIA's Material Definition Language,
subject to the following further conditions:
1. The above copyright notices, this list of conditions, and the disclaimer
that follows shall be retained in all copies of one or more of the MDL
Materials, including in any software with which the MDL Materials are bundled,
redistributed, and/or sold, and included either as stand-alone text files,
human-readable headers or in the appropriate machine-readable metadata fields
within text or binary files as long as those fields can be easily viewed by the
user, as applicable.
2. The name of NVIDIA shall not be used to promote, endorse or advertise any
Modified Version without specific prior written permission, except a) to comply
with the notice requirements otherwise contained herein; or b) to acknowledge
the contribution(s) of NVIDIA.
THE MDL MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT,
TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR
ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL,
INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE
THE MDL MATERIALS OR FROM OTHER DEALINGS IN THE MDL MATERIALS.
*/
mdl 1.5;
import ::anno::*;
import ::base::*;
import ::df::*;
import ::math::*;
import ::state::*;
import ::tex::*;
import ::nvidia::core_definitions::blend_colors;
import ::nvidia::core_definitions::dimension;
const string COPYRIGHT =
" Copyright 2024 NVIDIA Corporation. All rights reserved.\n"
" MDL MATERIALS ARE PROVIDED PURSUANT TO AN END USER LICENSE AGREEMENT,\n"
" WHICH WAS ACCEPTED IN ORDER TO GAIN ACCESS TO THIS FILE. IN PARTICULAR,\n"
" THE MDL MATERIALS ARE PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n"
" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF\n"
" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF\n"
" COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL NVIDIA\n"
" CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY\n"
" GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN\n"
" AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR\n"
" INABILITY TO USE THE MDL MATERIALS OR FROM OTHER DEALINGS IN THE MDL MATERIALS.\n";
float3 srgb2rgb(float3 val)
{
return ::math::pow(::math::max(val, float3(0.0f)), 2.2);
}
float uint2float(int x)
{
return float(x & 0x7FFFFFFF) + (x < 0 ? 2147483648.0 : 0.0);
}
int lowbias32(int x)
{
x ^= x >>> 16;
x *= 0x7feb352d;
x ^= x >>> 15;
x *= 0x846ca68b;
x ^= x >>> 16;
return x;
}
float2 rnd22(int2 p) {
float2 ret_val = float2(
uint2float(lowbias32(p[0] + lowbias32(p[1]))) / 4294967296.f,
uint2float(lowbias32(p[0] + 32000 + lowbias32(p[1]))) / 4294967296.f
);
return ret_val;
}
::base::texture_coordinate_info vmat_transform(
uniform float2 translation = float2(0.0, 0.0),
uniform float rotation = 0.0,
uniform float2 scaling = float2(1.0, 1.0),
uniform ::base::texture_coordinate_system system = ::base::texture_coordinate_uvw,
uniform int uv_space = 0
)
{
float rotation_rad = (rotation * 3.1415926535897932384626433832f) / 180.f;
float4x4 scale =
float4x4(1.0 /scaling.x, 0. , 0. , 0.,
0. , 1.0 /scaling.y , 0. , 0.,
0. , 0. , 1.0, 0.,
translation.x , translation.y , 0.0, 1.);
float s = ::math::sin(rotation_rad);
float c = ::math::cos(rotation_rad);
float4x4 rotate =
float4x4( c , -s , 0.0 , 0.0,
s , c , 0.0 , 0.0,
0.0, 0.0 , 1.0 , 0.0,
0. , 0.0 , 0.0 , 1.);
return ::base::transform_coordinate(scale*rotate, ::base::coordinate_source(system, uv_space));
}
float2x2 invert_2x2(float2x2 M)
{
float det = M[0][0]*M[1][1] - M[0][1]*M[1][0];
//https://www.chilimath.com/lessons/advanced-algebra/inverse-of-a-2x2-matrix/
return (1.0 / det) * float2x2(M[1][1], -M[0][1], -M[1][0], M[0][0]);
}
float3 nonrepeat_lookup(
uniform texture_2d texture = texture_2d(),
::base::texture_coordinate_info uvw = ::base::coordinate_source(),
float texture_scale = 1.0,
float3 average_color = float3(0.5),
float patch_size = 8.0
)
{
float2 uv_in = float2(uvw.position[0], uvw.position[1]) * texture_scale;
float Z = patch_size; // patch scale inside example texture
float CON = 1.0f;
float3 O = float3(0.f);
float2x2 M0 = float2x2(1.f,0.f, 0.5f, ::math::sqrt(3.f)/2.f);
float2x2 M = invert_2x2(M0); // transform matrix <-> tilted space
float2 U = uv_in;
float2 V = M * uv_in; //pre-tilted hexa coordinates
int2 I = int2(::math::floor(V)); // hexa-tile id
// The mean color needs to be determined in Photoshop then to make the
// average color work out, take the float value and calculate the apropriate
// mean value as (value^(1/2.2))
float3 m = average_color;
float3 F = float3(::math::frac(V)[0], ::math::frac(V)[1], 0.f), W;
F[2] = 1.0 - F[0] - F[1]; // local hexa coordinates
if( F[2] > 0.f )
O = (W[0] = F[2]) * (( ::tex::lookup_float3(texture, U/Z-rnd22(I))) - m*float(CON))
+ (W[1] = F[1]) * (( ::tex::lookup_float3(texture, U/Z-rnd22(I+int2(0,1)))) - m*float(CON))
+ (W[2] = F[0]) * (( ::tex::lookup_float3(texture, U/Z-rnd22(I+int2(1,0)))) - m*float(CON));
else
O = (W[0] = -F[2]) * (( ::tex::lookup_float3(texture, U/Z-rnd22(I+int2(1)))) - m*float(CON))
+ (W[1] = 1.f - F[1]) * (( ::tex::lookup_float3(texture, U/Z-rnd22(I+int2(1, 0)))) - m*float(CON))
+ (W[2] = 1.f - F[0]) * (( ::tex::lookup_float3(texture, U/Z-rnd22(I+int2(0, 1)))) - m*float(CON));
O = m + O/::math::length(W);
O = ::math::clamp( (O), 0.0, 1.0);
return float3(O);
}
float histogram_range(float input, float range, float position)
{
float low = ::math::clamp(1.0 - ::math::min(((1.0 - position) + range * 0.5), (1.0 - position) * 2), 0.0, 1.0);
float high = ::math::clamp(::math::min((position + range * 0.5 ), position * 2.0), 0.0, 1.0);
return ::math::lerp(low, high, input);
}
color endless_texture(
uniform texture_2d texture = texture_2d(),
::base::texture_coordinate_info uvw = ::base::coordinate_source(),
float texture_scale = 10.0,
float3 average_color = float3(0.5, 0.5, 1.0),
float patch_size = 8.0,
bool gamma_correct_lookup = true
)
{
return gamma_correct_lookup ? color(srgb2rgb(
nonrepeat_lookup (
texture: texture,
uvw: uvw,
texture_scale: texture_scale,
average_color: average_color,
patch_size: patch_size
))
) : color(nonrepeat_lookup (
texture: texture,
uvw: uvw,
texture_scale: texture_scale,
average_color: average_color,
patch_size: patch_size
));
}
float3 endless_normal(
uniform texture_2d texture = texture_2d(),
float factor = 1.0,
bool flip_tangent_u = false,
bool flip_tangent_v = false,
::base::texture_coordinate_info uvw = ::base::coordinate_source(),
float texture_scale = 1.0,
float3 average_color = float3(0.5, 0.5, 1.0),
float patch_size = 8.0
)
{
float3 transformed_tangent_u = flip_tangent_u ? uvw.tangent_u : - uvw.tangent_u;
float3 transformed_tangent_v = flip_tangent_v ? uvw.tangent_v : - uvw.tangent_v;
if (flip_tangent_u)
transformed_tangent_u=-transformed_tangent_u;
if (flip_tangent_v)
transformed_tangent_v=-transformed_tangent_v;
// normalized Lookup
float3 tangent_space_normal =
(nonrepeat_lookup (
texture: texture,
uvw: uvw,
texture_scale: texture_scale,
average_color: average_color,
patch_size: patch_size
) - 0.5) * (2.0 * factor);
return ::math::normalize(uvw.tangent_u * tangent_space_normal.x +
uvw.tangent_v * tangent_space_normal.y +
::state::normal()*1.0);
}
export material Styrofoam(
uniform bool infinite_tiling = true [[
::anno::description("Enables infinite tiling feature which removes repeating texture patterns. Note that depending on the material this feature changes the appearance of the material slightly."),
::anno::display_name("Infinite Tiling"),
::anno::in_group("Appearance")
]],
float brightness = 0.7f [[
::anno::description("Adjusts the lightness of the material"),
::anno::display_name("Brightness"),
::anno::in_group("Appearance")
]],
float roughness = 0.7f [[
::anno::description("Higher roughness values lead to bigger highlights and blurrier reflections."),
::anno::display_name("Roughness"),
::anno::in_group("Appearance")
]],
float translucency_amount = .75f [[
::anno::description("Sets the amount of translucency for the material."),
::anno::display_name("Transluceny Amount"),
::anno::in_group("Appearance")
]],
uniform bool subsurface_scattering = true [[
::anno::display_name("Subsurface Scattering"),
::anno::description("Enables / Disables subsurface scattering"),
::anno::in_group("Appearance")
]],
uniform float2 texture_translate = float2(0.f) [[
::anno::display_name("Translate"),
::anno::description("Offsets the position of the material"),
::anno::in_group("Transform")
]],
uniform float texture_rotate = 0.f [[
::anno::description("Rotates the material"),
::anno::display_name("Rotate"),
::anno::in_group("Transform")
]],
uniform float2 texture_scale = float2(1.0f) [[
::anno::description("Scales the material"),
::anno::display_name("Scale"),
::nvidia::core_definitions::dimension(float2(.12f, .12f)),
::anno::in_group("Transform")
]],
uniform bool enable_round_corners = true [[
::anno::description("Enables the round corner effect. Comes at a slight performance cost as additional raytracing calls are required to evaluate the round corner effect."),
::anno::display_name("Round Corners"),
::anno::in_group("Round Corners")
]],
uniform float radius = 1.5f [[
::anno::description("Radius of the rounded corners in millimeters (mm)"),
::anno::display_name("Radius mm"),
::anno::in_group("Round Corners")
]],
uniform bool across_materials = true [[
::anno::description("Applies the round corner effect across different materials when enabled."),
::anno::display_name("Across Materials"),
::anno::in_group("Round Corners")
]],
uniform int uv_space_index = 0 [[
::anno::description("Uses selected UV space for material"),
::anno::display_name("UV Space Index"),
::anno::in_group("Advanced")
]]
)
[[
::anno::author("NVIDIA vMaterials"),
::anno::display_name("Styrofoam"),
::anno::description("Foamed polystyrene material with subsurface scattering"),
::anno::copyright_notice(COPYRIGHT),
::anno::thumbnail("./.thumbs/Styrofoam.Styrofoam.png"),
::anno::key_words(string[]("plastic", "styrofoam", "polystyrene", "SSS", "volumetric", "synthetic", "construction", "new", "translucent", "artificial", "packaging", "rough", "bumped", "white", "neutral", "light"))
]]
=
let {
bool tmp0 = false;
material_surface tmp1(
::df::custom_curve_layer(0.0399999991f, 1.f, 5.f, 1.f, ::df::microfacet_ggx_smith_bsdf(histogram_range(float3(infinite_tiling ? endless_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.624000013f, 0.961000025f, 0.486000001f), 1.74300003f, true) : ::base::file_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), color(0.f, 0.f, 0.f), color(1.f, 1.f, 1.f), ::base::mono_alpha, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false).tint)[0], 1.f, ::math::lerp(0.272000015f, 0.899999976f, roughness)) * histogram_range(float3(infinite_tiling ? endless_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.624000013f, 0.961000025f, 0.486000001f), 1.74300003f, true) : ::base::file_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), color(0.f, 0.f, 0.f), color(1.f, 1.f, 1.f), ::base::mono_alpha, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false).tint)[0], 1.f, ::math::lerp(0.272000015f, 0.899999976f, roughness)), histogram_range(float3(infinite_tiling ? endless_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.624000013f, 0.961000025f, 0.486000001f), 1.74300003f, true) : ::base::file_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), color(0.f, 0.f, 0.f), color(1.f, 1.f, 1.f), ::base::mono_alpha, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false).tint)[0], 1.f, ::math::lerp(0.272000015f, 0.899999976f, roughness)) * histogram_range(float3(infinite_tiling ? endless_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.624000013f, 0.961000025f, 0.486000001f), 1.74300003f, true) : ::base::file_texture(texture_2d("./textures/styrofoam_multi_R_rough_G_ao.jpg", ::tex::gamma_linear), color(0.f, 0.f, 0.f), color(1.f, 1.f, 1.f), ::base::mono_alpha, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false).tint)[0], 1.f, ::math::lerp(0.272000015f, 0.899999976f, roughness)), color(1.f, 1.f, 1.f), ::state::texture_tangent_u(0), ::df::scatter_reflect), ::df::weighted_layer(translucency_amount * 0.5f, ::df::diffuse_transmission_bsdf(color(1.f, 1.f, 1.f)), ::df::weighted_layer(1.f, ::df::diffuse_reflection_bsdf(::nvidia::core_definitions::blend_colors(infinite_tiling ? endless_texture(texture_2d("./textures/styrofoam_diff.jpg", ::tex::gamma_linear), vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.819999993f, 0.842999995f, 0.870999992f), 1.74300003f, true) : ::base::file_texture(texture_2d("./textures/styrofoam_diff.jpg", ::tex::gamma_srgb), color(0.f, 0.f, 0.f), color(1.f, 1.f, 1.f), ::base::mono_alpha, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false).tint, color(0.f, 0.f, 0.f), ::base::color_layer_multiply, ::math::lerp(0.256999999f, 0.f, brightness), true).tint, 0.484000027f), bsdf(), infinite_tiling ? endless_normal(texture_2d("./textures/styrofoam_norm.jpg", ::tex::gamma_linear), 1.f, false, false, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.497999996f, 0.474999994f, 0.995999992f), 1.74300003f) : ::base::tangent_space_normal_texture(texture_2d("./textures/styrofoam_norm.jpg", ::tex::gamma_linear), 1.f, false, false, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false, 1.f, 0.f)), ::state::normal()), infinite_tiling ? endless_normal(texture_2d("./textures/styrofoam_norm.jpg", ::tex::gamma_linear), 1.f, false, false, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), 1.74300003f, float3(0.497999996f, 0.474999994f, 0.995999992f), 1.74300003f) : ::base::tangent_space_normal_texture(texture_2d("./textures/styrofoam_norm.jpg", ::tex::gamma_linear), 1.f, false, false, vmat_transform(texture_translate, texture_rotate, texture_scale, ::base::texture_coordinate_uvw, uv_space_index), float2(0.f, 1.f), float2(0.f, 1.f), ::tex::wrap_repeat, ::tex::wrap_repeat, false, 1.f, 0.f)),
material_emission(emission: edf(), intensity: color(0.f, 0.f, 0.f), mode: intensity_radiant_exitance));
material_surface tmp2 = material_surface(scattering: bsdf(), emission: material_emission(emission: edf(), intensity: color(0.f, 0.f, 0.f), mode: intensity_radiant_exitance));
color tmp3 = color(1.f, 1.f, 1.f);
material_volume tmp4 = subsurface_scattering ? material_volume(scattering: vdf(), absorption_coefficient: color(0.223414004f, 0.223414004f, 0.223414004f), scattering_coefficient: color(12.8298368f, 9.16941357f, 7.8158741f)) : material_volume(scattering: vdf(), absorption_coefficient: color(0.223414004f, 0.223414004f, 0.223414004f), scattering_coefficient: color(0.f, 0.f, 0.f));
material_geometry tmp5(
float3(0.f),
1.f,
enable_round_corners ? ::state::rounded_corner_normal(radius * 0.00100000005f, across_materials, 1.f) : ::state::normal());
} in
material(
thin_walled: tmp0,
surface: tmp1,
backface: tmp2,
ior: tmp3,
volume: tmp4,
geometry: tmp5);
export material Styrofoam_no_SSS(*)
[[
::anno::author("NVIDIA vMaterials"),
::anno::display_name("Styrofoam wo. SSS"),
::anno::description("Foamed polystyrene material with subsurface scattering"),
::anno::copyright_notice(COPYRIGHT),
::anno::thumbnail("./.thumbs/Styrofoam.Styrofoam_no_SSS.png"),
::anno::key_words(string[]("plastic", "styrofoam", "polystyrene", "SSS", "volumetric", "synthetic", "construction", "new", "translucent", "artificial", "packaging", "rough", "bumped", "white", "neutral", "light"))
]] = Styrofoam(
infinite_tiling: true,
brightness: 0.7f,
roughness: 0.7f,
translucency_amount: 0.75f ,
subsurface_scattering: false,
texture_translate: float2(0.0f),
texture_rotate: 0.0f,
texture_scale: float2(1.0f),
enable_round_corners: false,
radius: 1.5f,
across_materials: false,
uv_space_index: 0
); |