three
Version:
JavaScript 3D library
72 lines (59 loc) • 17.4 kB
JavaScript
import { Fn, vec2 } from '../../tsl/TSLBase.js';
import { texture } from '../../accessors/TextureNode.js';
import { DataTexture } from '../../../textures/DataTexture.js';
import { RGFormat, HalfFloatType, LinearFilter, ClampToEdgeWrapping } from '../../../constants.js';
/**
* Precomputed DFG LUT for Image-Based Lighting
* Resolution: 32x32
* Samples: 4096 per texel
* Format: RG16F (2 half floats per texel: scale, bias)
*/
const DATA = new Uint16Array( [
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0x3bf8, 0x1bca, 0x3bf8, 0x1bcc, 0x3bf8, 0x1bd8, 0x3bf8, 0x1bf7, 0x3bf6, 0x1c1b, 0x3bf4, 0x1c45, 0x3bf1, 0x1c83, 0x3bec, 0x1cce, 0x3be4, 0x1d21, 0x3bd5, 0x1d78, 0x3bc5, 0x1dd1, 0x3bb0, 0x1e17, 0x3b93, 0x1e4a, 0x3b70, 0x1e5f, 0x3b48, 0x1e57, 0x3b1b, 0x1e35, 0x3ae7, 0x1df6, 0x3ab2, 0x1da4, 0x3a77, 0x1d44, 0x3a3a, 0x1cdb, 0x39fc, 0x1c6e, 0x39bb, 0x1c03, 0x397a, 0x1b35, 0x3938, 0x1a72, 0x38f5, 0x19bb, 0x38b3, 0x1914, 0x3870, 0x187d, 0x382e, 0x17eb, 0x37db, 0x16f9, 0x375c, 0x1621, 0x36e1, 0x1565, 0x3669, 0x14be,
0x3bfb, 0x18b9, 0x3bfb, 0x18ba, 0x3bfb, 0x18c3, 0x3bfb, 0x18da, 0x3bf9, 0x190a, 0x3bf7, 0x1948, 0x3bf5, 0x19ac, 0x3bf0, 0x1a20, 0x3be9, 0x1ab3, 0x3bdb, 0x1b49, 0x3bcd, 0x1be6, 0x3bb7, 0x1c34, 0x3b9c, 0x1c6d, 0x3b7a, 0x1c8e, 0x3b54, 0x1c9e, 0x3b26, 0x1c96, 0x3af2, 0x1c75, 0x3abc, 0x1c47, 0x3a80, 0x1c09, 0x3a42, 0x1b85, 0x3a01, 0x1aec, 0x39be, 0x1a50, 0x397a, 0x19b5, 0x3935, 0x1921, 0x38f0, 0x1895, 0x38aa, 0x1814, 0x3866, 0x173a, 0x3821, 0x1665, 0x37be, 0x15a4, 0x373c, 0x14f9, 0x36be, 0x1460, 0x3644, 0x13b3,
0x3bfd, 0x156b, 0x3bfd, 0x156c, 0x3bfd, 0x1578, 0x3bfd, 0x1598, 0x3bfc, 0x15dd, 0x3bfa, 0x163c, 0x3bf7, 0x16cb, 0x3bf3, 0x177b, 0x3beb, 0x1833, 0x3be0, 0x18ad, 0x3bd2, 0x192e, 0x3bbd, 0x19a6, 0x3ba4, 0x1a0c, 0x3b83, 0x1a5a, 0x3b5d, 0x1a8c, 0x3b30, 0x1a9b, 0x3afd, 0x1a86, 0x3ac6, 0x1a5c, 0x3a89, 0x1a11, 0x3a49, 0x19b7, 0x3a06, 0x194f, 0x39c1, 0x18e3, 0x397a, 0x1873, 0x3933, 0x1805, 0x38eb, 0x173a, 0x38a3, 0x1676, 0x385c, 0x15bf, 0x3816, 0x1519, 0x37a2, 0x1482, 0x371d, 0x13f7, 0x369c, 0x1306, 0x3620, 0x1231,
0x3bff, 0x11cb, 0x3bff, 0x11cd, 0x3bfe, 0x11dd, 0x3bfe, 0x1219, 0x3bfd, 0x126b, 0x3bfb, 0x12e9, 0x3bf9, 0x13c5, 0x3bf5, 0x1460, 0x3bee, 0x150f, 0x3be3, 0x15c9, 0x3bd6, 0x168a, 0x3bc3, 0x174f, 0x3baa, 0x1806, 0x3b8b, 0x184f, 0x3b66, 0x1888, 0x3b39, 0x18a6, 0x3b07, 0x18ad, 0x3acf, 0x189c, 0x3a92, 0x1876, 0x3a50, 0x1840, 0x3a0c, 0x17fd, 0x39c4, 0x176a, 0x397b, 0x16ce, 0x3931, 0x1634, 0x38e6, 0x1599, 0x389c, 0x1508, 0x3852, 0x147f, 0x380a, 0x1401, 0x3788, 0x131c, 0x36ff, 0x124a, 0x367c, 0x1190, 0x35fe, 0x10ea,
0x3bff, 0x0daa, 0x3bff, 0x0dad, 0x3bff, 0x0dc0, 0x3bff, 0x0e0e, 0x3bfe, 0x0e87, 0x3bfc, 0x0f14, 0x3bfb, 0x1029, 0x3bf7, 0x10d1, 0x3bf0, 0x11d3, 0x3be6, 0x12c9, 0x3bd9, 0x13fc, 0x3bc7, 0x1499, 0x3bb0, 0x152a, 0x3b92, 0x15ab, 0x3b6e, 0x1615, 0x3b42, 0x165a, 0x3b10, 0x1681, 0x3ad8, 0x1683, 0x3a9a, 0x1665, 0x3a57, 0x1629, 0x3a11, 0x15dd, 0x39c8, 0x1580, 0x397c, 0x1518, 0x3930, 0x14ae, 0x38e3, 0x1441, 0x3896, 0x13b1, 0x384a, 0x12e9, 0x37ff, 0x122f, 0x376f, 0x1182, 0x36e3, 0x10e5, 0x365e, 0x1057, 0x35de, 0x0fac,
0x3c00, 0x08ea, 0x3c00, 0x08ed, 0x3c00, 0x0902, 0x3c00, 0x0961, 0x3bff, 0x09f3, 0x3bfd, 0x0abc, 0x3bfb, 0x0c1f, 0x3bf8, 0x0d15, 0x3bf1, 0x0e5b, 0x3be8, 0x0fb4, 0x3bdc, 0x10b0, 0x3bcb, 0x1190, 0x3bb5, 0x126c, 0x3b97, 0x132c, 0x3b74, 0x13de, 0x3b4a, 0x1432, 0x3b18, 0x145e, 0x3ae0, 0x1472, 0x3aa2, 0x146f, 0x3a5f, 0x1456, 0x3a17, 0x142e, 0x39cc, 0x13ee, 0x397e, 0x136b, 0x392f, 0x12e1, 0x38df, 0x124f, 0x3890, 0x11bd, 0x3842, 0x1131, 0x37eb, 0x10ac, 0x3757, 0x102e, 0x36c9, 0x0f76, 0x3640, 0x0ea3, 0x35bf, 0x0de4,
0x3c00, 0x039b, 0x3c00, 0x039d, 0x3c00, 0x03b2, 0x3c00, 0x041c, 0x3bff, 0x04be, 0x3bfd, 0x05d6, 0x3bfc, 0x0764, 0x3bf8, 0x08e2, 0x3bf2, 0x0a67, 0x3bea, 0x0c1b, 0x3bde, 0x0d41, 0x3bcd, 0x0e5f, 0x3bb8, 0x0f8c, 0x3b9c, 0x1057, 0x3b7a, 0x10e5, 0x3b51, 0x1155, 0x3b20, 0x11a5, 0x3ae8, 0x11da, 0x3aaa, 0x11ef, 0x3a66, 0x11e5, 0x3a1d, 0x11c1, 0x39d0, 0x1185, 0x3980, 0x113b, 0x392e, 0x10e5, 0x38dc, 0x1087, 0x388b, 0x1028, 0x383b, 0x0f94, 0x37d9, 0x0edb, 0x3741, 0x0e2c, 0x36af, 0x0d89, 0x3625, 0x0cf2, 0x35a1, 0x0c69,
0x3c00, 0x0107, 0x3c00, 0x0108, 0x3c00, 0x0110, 0x3c00, 0x0145, 0x3bff, 0x0197, 0x3bfe, 0x0224, 0x3bfc, 0x030c, 0x3bf8, 0x0478, 0x3bf3, 0x062c, 0x3beb, 0x0833, 0x3be0, 0x0979, 0x3bd0, 0x0aeb, 0x3bbc, 0x0c3d, 0x3ba0, 0x0d01, 0x3b80, 0x0dbd, 0x3b57, 0x0e69, 0x3b27, 0x0eeb, 0x3af0, 0x0f53, 0x3ab1, 0x0f8a, 0x3a6c, 0x0f9f, 0x3a22, 0x0f8b, 0x39d4, 0x0f5b, 0x3982, 0x0f0f, 0x392f, 0x0eac, 0x38da, 0x0e3d, 0x3886, 0x0dc9, 0x3834, 0x0d51, 0x37c7, 0x0cd9, 0x372c, 0x0c65, 0x3697, 0x0bef, 0x360a, 0x0b20, 0x3585, 0x0a62,
0x3c00, 0x0031, 0x3c00, 0x0031, 0x3c00, 0x0034, 0x3c00, 0x004b, 0x3bff, 0x006f, 0x3bfe, 0x00c9, 0x3bfc, 0x011b, 0x3bf9, 0x0207, 0x3bf4, 0x02d6, 0x3bec, 0x0415, 0x3be1, 0x0587, 0x3bd2, 0x0703, 0x3bbf, 0x087d, 0x3ba5, 0x096a, 0x3b85, 0x0a59, 0x3b5d, 0x0b32, 0x3b2e, 0x0bee, 0x3af7, 0x0c44, 0x3ab8, 0x0c7c, 0x3a73, 0x0c9c, 0x3a28, 0x0ca4, 0x39d8, 0x0c98, 0x3985, 0x0c77, 0x392f, 0x0c4a, 0x38d9, 0x0c10, 0x3882, 0x0ba0, 0x382e, 0x0b14, 0x37b6, 0x0a84, 0x3717, 0x09f5, 0x3680, 0x0969, 0x35f0, 0x08e6, 0x356a, 0x086a,
0x3c00, 0x0004, 0x3c00, 0x0004, 0x3c00, 0x0004, 0x3c00, 0x000d, 0x3bff, 0x0021, 0x3bfe, 0x003b, 0x3bfd, 0x0070, 0x3bf9, 0x00c7, 0x3bf4, 0x012e, 0x3bed, 0x01c8, 0x3be3, 0x0274, 0x3bd4, 0x033b, 0x3bc1, 0x043a, 0x3ba8, 0x0534, 0x3b89, 0x0641, 0x3b62, 0x073b, 0x3b34, 0x0815, 0x3afd, 0x087c, 0x3abf, 0x08d0, 0x3a7a, 0x090a, 0x3a2e, 0x092c, 0x39dd, 0x0936, 0x3988, 0x0928, 0x3930, 0x0907, 0x38d7, 0x08d7, 0x387f, 0x089b, 0x3828, 0x0855, 0x37a7, 0x080b, 0x3704, 0x077b, 0x366a, 0x06e1, 0x35d8, 0x0649, 0x3550, 0x05b8,
0x3c00, 0x0000, 0x3c00, 0x0000, 0x3c00, 0x0000, 0x3c00, 0x0003, 0x3bff, 0x0012, 0x3bfe, 0x001a, 0x3bfd, 0x0035, 0x3bfa, 0x0050, 0x3bf4, 0x0061, 0x3bed, 0x00a5, 0x3be4, 0x00ee, 0x3bd6, 0x0146, 0x3bc3, 0x01ab, 0x3bab, 0x0211, 0x3b8d, 0x028e, 0x3b67, 0x0303, 0x3b39, 0x0375, 0x3b04, 0x03e2, 0x3ac6, 0x0441, 0x3a80, 0x0492, 0x3a34, 0x04cd, 0x39e1, 0x04f2, 0x398b, 0x0504, 0x3931, 0x0502, 0x38d6, 0x04ec, 0x387c, 0x04c7, 0x3822, 0x0496, 0x3798, 0x045c, 0x36f2, 0x041a, 0x3655, 0x03d5, 0x35c1, 0x038e, 0x3537, 0x0347
] );
let lut = null;
const DFGApprox = /*@__PURE__*/ Fn( ( { roughness, dotNV } ) => {
if ( lut === null ) {
lut = new DataTexture( DATA, 32, 32, RGFormat, HalfFloatType );
lut.minFilter = LinearFilter;
lut.magFilter = LinearFilter;
lut.wrapS = ClampToEdgeWrapping;
lut.wrapT = ClampToEdgeWrapping;
lut.generateMipmaps = false;
lut.needsUpdate = true;
}
const uv = vec2( roughness, dotNV );
return texture( lut, uv ).rg;
} );
export default DFGApprox;