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// Copyright 2023 NVIDIA Corporation. All rights reserved.
//
// NVIDIA CORPORATION and its licensors retain all intellectual property
// and proprietary rights in and to this software, related documentation
// and any modifications thereto. Any use, reproduction, disclosure or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA CORPORATION is strictly prohibited.
mdl 1.6;
import ::anno::*;
import ::base::*;
import ::math::*;
import ::state::*;
import ::tex::*;
export using ::base import texture_return;
// Returns the normal n in tangent space, given n is in internal space.
float3 transform_internal_to_tangent(float3 n)
{
return
n.x * float3(state::texture_tangent_u(0).x, state::texture_tangent_v(0).x, state::normal().x) +
n.y * float3(state::texture_tangent_u(0).y, state::texture_tangent_v(0).y, state::normal().y) +
n.z * float3(state::texture_tangent_u(0).z, state::texture_tangent_v(0).z, state::normal().z);
}
// 3dsmax Bitmap Transformation Matrix
uniform float4x4 max_rotation_translation_scale
(
uniform float3 rotation = float3(0.)
[[ anno::description("Rotation applied to every UVW coordinate") ]],
uniform float3 translation = float3(0.)
[[ anno::description("Offset applied to every UVW coordinate") ]],
uniform float3 scaling = float3(1.)
[[ anno::description("Scale applied to every UVW coordinate") ]],
uniform bool u_mirror = false
[[ anno::description("Mirror repeat has twice the number of textures in the same space") ]],
uniform bool v_mirror = false
[[ anno::description("Mirror repeat has twice the number of textures in the same space") ]]
)
[[
anno::description("Construct transformation matrix from Euler rotation, translation and scale")
]]
{
float4x4 scale =
float4x4(u_mirror?scaling.x*2.:scaling.x , 0. , 0. , 0.,
0. , v_mirror?scaling.y*2.:scaling.y , 0. , 0.,
0. , 0. , scaling.z , 0.,
u_mirror?1.:.5 , v_mirror?1.:.5 , .5 , 1.);
float4x4 translate =
float4x4(1. , 0. , 0. , 0.,
0. , 1. , 0. , 0.,
0. , 0. , 1. , 0.,
-0.5-translation.x, -0.5-translation.y, -0.5-translation.z, 1.);
// Euler rotation matrix xyz order
float3 s = math::sin(rotation);
float3 c = math::cos(rotation);
float4x4 rotate =
float4x4( c.y*c.z , c.y*s.z , -s.y , 0.0,
-c.x*s.z + s.x*s.y*c.z, c.x*c.z + s.x*s.y*s.z , s.x*c.y , 0.0,
s.x*s.z + c.x*s.y*c.z , -s.x*c.z + c.x*s.y*s.z, c.x*c.y , 0.0,
0. , 0. , 0. , 1.);
return scale *rotate*translate;
}
export enum vray_color_mode
[[
anno::hidden()
]]
{
mode_color,
mode_temperature
};
export enum vray_color_primaries
[[
anno::hidden()
]]
{
primaries_none,
primaries_sRGB,
primaries_ACEScg
};
export enum vray_bitmap_primaries
[[
anno::hidden()
]]
{
bm_primaries_default,
bm_primaries_sRGB,
bm_primaries_ACEScg,
bm_primaries_raw
};
export enum vray_rgb_output
[[
anno::hidden()
]]
{
rgb_output_rgb_color,
rgb_output_alpha_as_grey,
rgb_output_intensity_as_grey
};
export enum vray_mono_output
[[
anno::hidden()
]]
{
mono_output_rgb_intensity,
mono_output_alpha
};
export enum vray_alpha_source
[[
anno::hidden()
]]
{
alpha_source_image_alpha,
alpha_source_intensity,
alpha_source_opaque
};
// VRayBitmap map
export texture_return VRayBitmap
(
// UVW Coordinates
uniform int mapChannel=1
[[
anno::in_group("Coordinates"),
anno::display_name("Map channel")
]],
uniform float U_Offset = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("U Offset")
]],
uniform float V_Offset = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("V Offset")
]],
uniform float U_Tiling = 1.f
[[
anno::in_group("Coordinates"),
anno::display_name("U Tiling")
]],
uniform float V_Tiling = 1.f
[[
anno::in_group("Coordinates"),
anno::display_name("V Tiling")
]],
uniform bool U_Tile=true //it is actually an error if both mirror and tile are true
[[
anno::in_group("Coordinates"),
anno::display_name("U Tile")
]],
uniform bool U_Mirror=false
[[
anno::in_group("Coordinates"),
anno::display_name("U Mirror")
]],
uniform bool V_Tile=true
[[
anno::in_group("Coordinates"),
anno::display_name("V Tile")
]],
uniform bool V_Mirror=false
[[
anno::in_group("Coordinates"),
anno::display_name("V Mirror")
]],
uniform float U_angle = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("U Angle")
]],
uniform float V_angle = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("V Angle")
]],
uniform float W_angle = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("W Angle")
]],
uniform int UVW_Type = 0 //enum?
[[
anno::in_group("Coordinates"),
anno::display_name("UVW Type"),
anno::unused(),
anno::hidden()
]],
// Bitmap
uniform texture_2d filename = texture_2d()
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Bitmap")
]],
uniform float multiplier = 1.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Overall multiplier")
]],
uniform vray_rgb_output rgb_output = rgb_output_rgb_color
[[
anno::in_group("Bitmap parameters"),
anno::display_name("RGB output")
]],
uniform vray_mono_output mono_output = mono_output_rgb_intensity
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Mono output")
]],
uniform vray_alpha_source alpha_source = alpha_source_image_alpha
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Alpha source")
]],
uniform vray_bitmap_primaries rgb_primaries = bm_primaries_raw
[[
anno::in_group("Bitmap parameters"),
anno::display_name("RGB primaries"),
anno::unused(),
anno::hidden()
]],
uniform bool crop_enable = false
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Crop")
]],
uniform float crop_u = 0.f //u+w and v+h are always <=1.0
[[
anno::in_group("Bitmap parameters"),
anno::display_name("U Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float crop_w = 1.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("W Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float crop_v = 0.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("V Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float crop_h = 1.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("H Crop"),
anno::hard_range(0.f, 1.f)
]],
// Output
uniform float bump_amount = 1.f
[[
anno::in_group("Output"),
anno::display_name("Bump amount"),
anno::unused(),
anno::hidden()
]],
uniform bool clamp = false
[[
anno::in_group("Output"),
anno::display_name("Clamp"),
anno::unused(),
anno::hidden()
]],
uniform bool invert = false
[[
anno::in_group("Output"),
anno::display_name("Invert")
]],
uniform bool alphaFromRGB = false
[[
anno::in_group("Output"),
anno::display_name("Alpha from RGB intensity"),
anno::unused(),
anno::hidden()
]],
uniform float output_amount = 1.f
[[
anno::in_group("Output"),
anno::display_name("Output amount")
]],
uniform float rgb_level = 1.f
[[
anno::in_group("Output"),
anno::display_name("RGB level")
]],
uniform float rgb_offset = 0.f
[[
anno::in_group("Output"),
anno::display_name("RGB Offset")
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
uniform float clip_u = crop_enable ? crop_u : 0.f;
uniform float clip_w = crop_enable ? crop_w : 1.f;
uniform float clip_v = crop_enable ? crop_v : 0.f;
uniform float clip_h = crop_enable ? crop_h : 1.f;
texture_return bitmap_sample = base::file_texture
(
texture : filename,
mono_source : (alpha_source == alpha_source_image_alpha) ? base::mono_alpha : base::mono_average,
crop_u : float2(clip_u, clip_w + clip_u),
crop_v : float2(1.f - clip_v - clip_h, 1.f - clip_v),
uvw : base::transform_coordinate
(
transform : max_rotation_translation_scale
(
scaling : float3(U_Tiling, V_Tiling, 1.f),
rotation : float3(U_angle, V_angle, W_angle)/180.f*math::PI ,
translation : float3(U_Offset, V_Offset, 0.f), u_mirror : U_Mirror, v_mirror : V_Mirror
),
coordinate : base::coordinate_source(texture_space: mapChannel-1)
),
wrap_u : U_Tile ? tex::wrap_repeat : U_Mirror ? tex::wrap_mirrored_repeat : tex::wrap_clip,
wrap_v : V_Tile ? tex::wrap_repeat : V_Mirror ? tex::wrap_mirrored_repeat : tex::wrap_clip
);
bitmap_sample.tint = invert ?
bitmap_sample.tint * (-rgb_level * output_amount * multiplier ) + (1.f - rgb_offset) :
bitmap_sample.tint * (rgb_level * output_amount * multiplier) + rgb_offset;
float alpha = (alpha_source != alpha_source_opaque) ? bitmap_sample.mono : 1.f;
bitmap_sample.tint = bitmap_sample.tint*alpha;
// determinate mono output
if(mono_output == mono_output_alpha)
bitmap_sample.mono = alpha;
else
bitmap_sample.mono = math::average(bitmap_sample.tint);
// determinate rgb output
if(rgb_output == rgb_output_alpha_as_grey)
bitmap_sample.tint = color(alpha);
else if(rgb_output == rgb_output_intensity_as_grey)
bitmap_sample.tint = color(math::average(bitmap_sample.tint));
return bitmap_sample;
}
// VRayBitmap Map for Bump
export float3 VRayBitmap_bump
(
// UVW Coordinates
uniform int mapChannel=1
[[
anno::in_group("Coordinates"),
anno::display_name("Map channel")
]],
uniform bool U_Tile=true
[[
anno::in_group("Coordinates"),
anno::display_name("U Tile")
]],
uniform bool U_Mirror=false
[[
anno::in_group("Coordinates"),
anno::display_name("U Mirror")
]],
uniform bool V_Tile=true
[[
anno::in_group("Coordinates"),
anno::display_name("V Tile")
]],
uniform bool V_Mirror=false
[[
anno::in_group("Coordinates"),
anno::display_name("V Mirror")
]],
uniform float U_angle = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("U Angle")
]],
uniform float V_angle = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("V Angle")
]],
uniform float W_angle = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("W Angle")
]],
uniform float U_Offset = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("U Offset")
]],
uniform float V_Offset = 0.f
[[
anno::in_group("Coordinates"),
anno::display_name("V Offset")
]],
uniform float U_Tiling = 1.f
[[
anno::in_group("Coordinates"),
anno::display_name("U Tiling")
]],
uniform float V_Tiling = 1.
[[
anno::in_group("Coordinates"),
anno::display_name("V Tiling")
]],
uniform int UVW_Type = 0 //enum?
[[
anno::in_group("Coordinates"),
anno::display_name("UVW Type"),
anno::unused()
]],
// Bitmap
uniform texture_2d filename = texture_2d()
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Bitmap")
]],
uniform bool crop_enable = false
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Crop")
]],
uniform float crop_u = 0.f //u+w and v+h are always <=1.0
[[
anno::in_group("Bitmap parameters"),
anno::display_name("U Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float crop_w = 1.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("W Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float crop_v = 0.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("V Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float crop_h = 1.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("H Crop"),
anno::hard_range(0.f, 1.f)
]],
uniform float factor = 1.f
[[
anno::in_group("Bitmap parameters"),
anno::display_name("Bump amount")
]],
// Output
uniform float bump_amount = 1.f
[[
anno::in_group("Output"),
anno::display_name("Bump output")
]],
uniform bool clamp = false
[[
anno::in_group("Output"),
anno::display_name("Clamp"),
anno::unused()
]],
uniform bool invert = false
[[
anno::in_group("Output"),
anno::display_name("Invert")
]],
uniform bool alphaFromRGB = false
[[
anno::in_group("Output"),
anno::display_name("Alpha from RGB intensity"),
anno::unused()
]],
uniform float output_amount = 1.f
[[
anno::in_group("Output"),
anno::display_name("Output amount"),
anno::unused()
]],
uniform float rgb_level = 1.f
[[
anno::in_group("Output"),
anno::display_name("RGB level"),
anno::unused()
]],
uniform float rgb_offset = 0.f
[[
anno::in_group("Output"),
anno::display_name("RGB Offset"),
anno::unused()
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
uniform float clip_u = crop_enable ? crop_u : 0.f;
uniform float clip_w = crop_enable ? crop_w : 1.f;
uniform float clip_v = crop_enable ? crop_v : 0.f;
uniform float clip_h = crop_enable ? crop_h : 1.f;
return base::file_bump_texture
(
texture : filename,
crop_u : float2(clip_u, clip_w + clip_u),
crop_v : float2(1.f - clip_v - clip_h, 1.f - clip_v),
uvw : base::transform_coordinate
(
transform : max_rotation_translation_scale
(
scaling : float3(U_Tiling, V_Tiling, 1.f),
rotation : float3(U_angle, V_angle,W_angle)/(180.*math::PI),
translation : float3(U_Offset, V_Offset, 0.f), u_mirror : U_Mirror, v_mirror : V_Mirror
),
coordinate : base::coordinate_source(texture_space: mapChannel - 1)
),
wrap_u : U_Tile ? tex::wrap_repeat : U_Mirror ? tex::wrap_mirrored_repeat : tex::wrap_clip,
wrap_v : V_Tile ? tex::wrap_repeat : V_Mirror ? tex::wrap_mirrored_repeat : tex::wrap_clip,
factor : invert ? -10.f*factor*bump_amount : 10.f*factor*bump_amount
);
}
// VRayBump2Normal Map for Bump
export enum vray_bump2normal_mode
[[
anno::hidden()
]]
{
b2n_tangent_space,
b2n_local_XYZ,
b2n_screen_space,
b2n_world_space
};
export texture_return VRayBump2Normal
(
float3 bump_map = state::normal()
[[
anno::in_group("Parameters"),
anno::display_name("Bump map")
]],
uniform float bump_map_mult = 100.f
[[
anno::in_group("Parameters"),
anno::display_name("Bump map multiplier"),
anno::hard_range(0.f, 100.f)
]],
uniform vray_bump2normal_mode mode = b2n_tangent_space
[[
anno::in_group("Parameters"),
anno::display_name("Mode"),
anno::unused(),
anno::hidden()
]],
uniform int map_channel=1
[[
anno::in_group("Coordinates"),
anno::display_name("Map channel"),
anno::unused(),
anno::hidden()
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
texture_return normal_tex;
float3 normal_tangent_space =
transform_internal_to_tangent(math::normalize(state::normal() + (bump_map - state::normal())*(bump_map_mult*0.01f)));
normal_tex.tint = color( (normal_tangent_space + float3(1.f))*0.5f );
normal_tex.mono = 1.f;
return normal_tex;
}
// VRayColor Map
export texture_return VRayColor
(
uniform vray_color_mode color_mode = mode_color
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Color mode")
]],
uniform float temperature = 6500.f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Temperature"),
anno::hard_range(350.f, 1000000000.f)
]],
uniform float red = 0.5f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Red"),
anno::soft_range(0.f, 1.f)
]],
uniform float green = 0.5f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Green"),
anno::soft_range(0.f, 1.f)
]],
uniform float blue = 0.5f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Blue"),
anno::soft_range(0.f, 1.f)
]],
uniform float rgb_multiplier = 1.f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("RGB Multiplier")
]],
uniform float alpha = 1.f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Alpha"),
anno::hard_range(0.f, 1.f)
]],
uniform float color_gamma = 1.0f
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("Color gamma"),
anno::hard_range(0.05f, 20.f)
]],
uniform vray_color_primaries rgb_primaries = primaries_none
[[
anno::in_group("VRayColor Parameters"),
anno::display_name("RGB primaries"),
anno::unused(),
anno::hidden()
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
float3 rgb(red, green, blue);
// using temperature?. Then convert from Kelvin to RGB
if(color_mode == mode_temperature)
{
float k = temperature*0.01f;
// red
if (temperature < 6600.f)
{
rgb.x = 1.f;
}
else
{
float r = k - 55.f;
r = (351.9769f + 0.1142f * r - 40.2537f * math::log(r))/255.f;
rgb.x = math::clamp(r, 0.f, 1.f);
}
// green
if (temperature < 6600.f)
{
float g = k - 2.f;
g = (-155.2549f - 0.4460f * g + 104.4922f * math::log(g))/255.f;
rgb.y = math::clamp(g, 0.f, 1.f);
}
else
{
float g = k - 50.f;
g = (325.4494f + 0.0794f * g - 28.0853f * math::log(g))/255.f;
rgb.y = math::clamp(g, 0.f, 1.f);
}
// blue
if (temperature >= 6600.f)
{
rgb.z = 1.f;
}
else if (temperature <= 2000.f)
{
rgb.z = 0.f;
}
else
{
float b = k - 10.f;
b = (-254.7694f + 0.8274f * blue + 115.6799f * math::log(b))/255.f;
rgb.z = math::clamp(b, 0.f, 1.f);
}
}
// apply gamma
if(color_gamma != 1.f)
rgb = math::pow(rgb, 1.f/color_gamma);
// apply multiplier
rgb *= rgb_multiplier;
// fix ranges and return
rgb = math::clamp(rgb, 0.f, 1.f);
return texture_return(color(rgb), alpha);
}
// VRayColor Map for Bump
export float3 VRayColor_bump
(
)
[[
anno::author("NVIDIA Corporation")
]]
{
return state::normal();
}
// VRayColor2Bump Map for Bump
export float3 VRayColor2Bump_bump
(
float3 map = state::normal()
[[
anno::in_group("Parameters"),
anno::display_name("Bump map")
]],
uniform float height = 2.0f
[[
anno::in_group("Parameters"),
anno::display_name("Height"),
anno::unused(),
anno::hidden()
]],
uniform float bump_delta_scale = 1.0f
[[
anno::in_group("Parameters"),
anno::display_name("Bump delta scale"),
anno::unused(),
anno::hidden(),
anno::hard_range(0.f, 1.f)
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
return map;
}
// VRay Dirt Map
export texture_return VRayDirt
(
float radius = 10.f
[[
anno::in_group("VRayDirt Parameters"),
anno::display_name("Radius"),
anno::unused(),
anno::hidden()
]],
color occluded_color = color(0.f)
[[
anno::in_group("VRayDirt Parameters"),
anno::display_name("Occluded color"),
anno::unused(),
anno::hidden()
]],
color unoccluded_color = color(1.f)
[[
anno::in_group("VRayDirt Parameters"),
anno::display_name("Unoccluded color")
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
return texture_return(unoccluded_color, 1.f);
}
// VRay Edges Tex Map
export texture_return VRayEdgesTex
(
color edges_color = color(1.f)
[[
anno::in_group("VRayEdgesTex params"),
anno::display_name("Color")
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
return texture_return(edges_color, 1.f);
}
// VRay Edges Tex Map for bump
export float3 VRayEdgesTex_bump
(
color edges_color = color(1.f)
[[
anno::in_group("VRayEdgesTex params"),
anno::display_name("Color"),
anno::unused(),
anno::hidden()
]],
uniform float radius = 0.1f
[[
anno::in_group("VRayEdgesTex params"),
anno::display_name("Radius"),
anno::hard_range(0.f, 100.f)
]],
uniform bool same_object_only = true
[[
anno::in_group("VRayEdgesTex params"),
anno::display_name("Consider same object only")
]],
uniform int corners_mode = 0
[[
anno::in_group("VRayEdgesTex params"),
anno::display_name("Corners"),
anno::unused(),
anno::hidden()
]],
float multiplier = 1.f
[[
anno::in_group("VRayEdgesTex params"),
anno::display_name("Multiplier"),
anno::unused(),
anno::hidden()
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
return state::rounded_corner_normal(radius*state::meters_per_scene_unit(), !same_object_only);
}
// VRay Normap Map for bump
export float3 VRayNormalMap_bump
(
texture_return normal_map = texture_return()
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Normal map")
]],
float3 bump_map = state::normal()
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Bump map")
]],
uniform float normal_amount = 1.f
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Normal amount"),
anno::hard_range(-1000.f, 1000.f)
]],
uniform float bump_amount = 1.f
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Bump amount"),
anno::hard_range(-1000.f, 1000.f)
]],
uniform bool flip_red = false
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Flip red")
]],
uniform bool flip_green = false
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Flip green")
]],
uniform bool swap_rg = false
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Swap red and green")
]],
uniform int map_channel = 1
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Map channel"),
anno::hidden(),
anno::unused()
]],
uniform float map_rotation = 0.f
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Map rotation"),
anno::hard_range(0.f, 360.f),
anno::hidden(),
anno::unused()
]],
uniform float normal_map_amount = 1.0f
[[
anno::in_group("VRayNormalMap Parameters"),
anno::display_name("Map amount"),
anno::hard_range(-10.f, 10.f)
]]
)
[[
anno::author("NVIDIA Corporation")
]]
{
float3 tangent_space_normal = float3(normal_map.tint);
if(flip_red)
tangent_space_normal.x = 1.f - tangent_space_normal.x;
if(flip_green)
tangent_space_normal.y = 1.f - tangent_space_normal.y;
if(swap_rg)
{
float tmp = tangent_space_normal.x;
tangent_space_normal.x = tangent_space_normal.y;
tangent_space_normal.y = tmp;
}
float normal_factor = normal_amount*(normal_map_amount);
tangent_space_normal = (tangent_space_normal - float3(0.5f))*(2.f*normal_factor);
float3 mapped_normal = math::normalize(
state::texture_tangent_u(0) * tangent_space_normal.x +
state::texture_tangent_v(0) * tangent_space_normal.y +
state::normal() * (tangent_space_normal.z + (1.f - normal_factor)));
float3 bumped_normal = math::normalize(math::lerp(state::normal(), bump_map, bump_amount*normal_map_amount));
return math::normalize(mapped_normal + bumped_normal);
}
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