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Add Paramter::TextureStrength(). Precise default values.

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The default values on these methods as been set to what is described [here](https://github.com/KhronosGroup/glTF/tree/master/specification/2.0?ts=4#normaltextureinfo) and [here](https://github.com/KhronosGroup/glTF/tree/master/specification/2.0?ts=4#occlusiontextureinfo).

This is to keep consistent with the API behavior from #144
This commit is contained in:
Arthur Brainville 2019-07-05 00:26:02 +02:00 committed by Arthur Brianville (Ybalrid)
parent 689edcbef6
commit 8a98d98cd9
1 changed files with 15 additions and 1 deletions
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16
tiny_gltf.h
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@ -390,6 +390,7 @@ struct Parameter {
if (it != std::end(json_double_value)) {
return int(it->second);
}
// As per the spec, if texCoord is ommited, this parameter is 0
return 0;
}
@ -401,7 +402,20 @@ struct Parameter {
if (it != std::end(json_double_value)) {
return it->second;
}
return -1;
// As per the spec, if scale is ommited, this paramter is 1
return 1;
}
/// Return the strength of a texture if this Parameter is a an occlusion map.
/// Returned value is only valid if the parameter represent an occlusion map
/// from a material
double TextureStrength() const {
const auto it = json_double_value.find("strength");
if (it != std::end(json_double_value)) {
return it->second;
}
// As per the spec, if strenghth is ommited, this parameter is 1
return 1;
}
/// Material factor, like the roughness or metalness of a material