### 3.7.4 consts.inc

This file defines a number of constants, including things such as mapping types and ior definitions.

#### 3.7.4.1 Vector constants

`o` = < 0, 0, 0> (origin)
`xy` = < 1, 1, 0>
`yz` = < 0, 1, 1>
`xz` = < 1, 0, 1>

#### 3.7.4.2 Map type constants

`Plane_Map` = 0
`Sphere_Map` = 1
`Cylinder_Map` = 2
`Torus_Map` = 5

#### 3.7.4.3 Interpolation type constants

`Bi` = 2
`Norm` = 4

#### 3.7.4.4 Fog type constants

`Uniform_Fog` = 1
`Ground_Fog` = 2

#### 3.7.4.5 Focal blur hexgrid constants

`Hex_Blur1` = 7
`Hex_Blur2` = 19
`Hex_Blur3` = 37

#### 3.7.4.6 IORs

`Air_Ior` = 1.000292
`Amethyst_Ior` = 1.550
`Apatite_Ior` = 1.635
`Aquamarine_Ior` = 1.575
`Beryl_Ior` = 1.575
`Citrine_Ior` = 1.550
`Crown_Glass_Ior` = 1.51
`Corundum_Ior` = 1.765
`Diamond_Ior` = 2.47
`Emerald_Ior` = 1.575
`Flint_Glass_Ior` = 1.71
`Flint_Glass_Heavy_Ior` = 1.8
`Flint_Glass_Medium_Ior` = 1.63
`Flint_Glass_Light_Ior` = 1.6
`Fluorite_Ior` = 1.434
`Gypsum_Ior` = 1.525
`Ice_Ior` = 1.31
`Plexiglas_Ior` = 1.5
`Quartz_Ior` = 1.550
`Quartz_Glass_Ior` = 1.458
`Ruby_Ior` = 1.765
`Salt_Ior` = 1.544
`Sapphire_Ior` = 1.765
`Topaz_Ior` = 1.620
`Tourmaline_Ior` = 1.650
`Water_Ior` = 1.33

#### 3.7.4.7 Dispersion amounts

`Quartz_Glass_Dispersion` = 1.012
`Water_Dispersion` = 1.007
`Diamond_Dispersion` = 1.035
`Sapphire_Dispersion` = 1.015

#### 3.7.4.8 Scattering media type constants

`ISOTROPIC_SCATTERING` = 1;
`MIE_HAZY_SCATTERING` = 2;
`MIE_MURKY_SCATTERING` = 3;
`RAYLEIGH_SCATTERING` = 4;
`HENYEY_GREENSTEIN_SCATTERING` = 5;