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Fix typo in normal vector calculation example #1303

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Apr 2, 2018
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Fix typo in normal vector calculation example #1303

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2 changes: 1 addition & 1 deletion specification/2.0/README.md
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Expand Up @@ -2643,7 +2643,7 @@ A set of parameter values that are used to define the metallic-roughness materia

#### material.normalTexture

A tangent space normal map. The texture contains RGB components in linear space. Each texel represents the XYZ components of a normal vector in tangent space. Red [0 to 255] maps to X [-1 to 1]. Green [0 to 255] maps to Y [-1 to 1]. Blue [128 to 255] maps to Z [1/255 to 1]. The normal vectors use OpenGL conventions where +X is right and +Y is up. +Z points toward the viewer. In GLSL, this vector would be unpacked like so: `float3 normalVector = tex2D(normalMap, texCoord) * 2 - 1`. Client implementations should normalize the normal vectors before using them in lighting equations.
A tangent space normal map. The texture contains RGB components in linear space. Each texel represents the XYZ components of a normal vector in tangent space. Red [0 to 255] maps to X [-1 to 1]. Green [0 to 255] maps to Y [-1 to 1]. Blue [128 to 255] maps to Z [1/255 to 1]. The normal vectors use OpenGL conventions where +X is right and +Y is up. +Z points toward the viewer. In GLSL, this vector would be unpacked like so: `vec3 normalVector = tex2D(normalMap, texCoord) * 2 - 1`. Client implementations should normalize the normal vectors before using them in lighting equations.

* **Type**: `object`
* **Required**: No
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