/// <summary>
/// Standard の Metallic, Smoothness, Occlusion をまとめ、index を確定させる
/// </summary>
/// <param name="metallicSmoothTexture"></param>
/// <param name="smoothness"></param>
/// <param name="occlusionTexture"></param>
/// <returns></returns>
public int ExportMetallicSmoothnessOcclusion(Texture metallicSmoothTexture, float smoothness, Texture occlusionTexture)
{
if (metallicSmoothTexture == null && occlusionTexture == null)
{
return(-1);
}
// cache
if (m_exportMap.TryGetValue(new ExportKey(metallicSmoothTexture, glTFTextureTypes.OcclusionMetallicRoughness), out var index))
{
return(index);
}
if (m_exportMap.TryGetValue(new ExportKey(occlusionTexture, glTFTextureTypes.OcclusionMetallicRoughness), out index))
{
return(index);
}
//
// Unity と glTF で互換性が無いので必ず変換が必用
//
index = Exported.Count;
var texture2D = OcclusionMetallicRoughnessConverter.Export(metallicSmoothTexture, smoothness, occlusionTexture);
Exported.Add(texture2D);
m_exportMap.Add(new ExportKey(metallicSmoothTexture, glTFTextureTypes.OcclusionMetallicRoughness), index);
if (occlusionTexture != metallicSmoothTexture && occlusionTexture != null)
{
m_exportMap.Add(new ExportKey(occlusionTexture, glTFTextureTypes.OcclusionMetallicRoughness), index);
}
return(index);
}
public void ExportingColorTest()
{
{
var smoothness = 1.0f;
Assert.That(
OcclusionMetallicRoughnessConverter.ExportPixel(new Color32(255, 255, 255, 255), smoothness, default),
// r <- 0 : (Unused)
// g <- 0 : ((1 - src.a(as float) * smoothness) ^ 2)(as uint8)
// b <- 255 : Same metallic (src.r)
// a <- 255 : (Unused)
Is.EqualTo(new Color32(0, 0, 255, 255)));
}
{
var smoothness = 0.5f;
Assert.That(
OcclusionMetallicRoughnessConverter.ExportPixel(new Color32(255, 255, 255, 255), smoothness, default),
// r <- 0 : (Unused)
// g <- 63 : ((1 - src.a(as float) * smoothness) ^ 2)(as uint8)
// b <- 255 : Same metallic (src.r)
// a <- 255 : (Unused)
Is.EqualTo(new Color32(0, 127, 255, 255)));
}
{
var smoothness = 0.0f;
Assert.That(
OcclusionMetallicRoughnessConverter.ExportPixel(new Color32(255, 255, 255, 255), smoothness, default),
// r <- 0 : (Unused)
// g <- 255 : ((1 - src.a(as float) * smoothness) ^ 2)(as uint8)
// b <- 255 : Same metallic (src.r)
// a <- 255 : (Unused)
Is.EqualTo(new Color32(0, 255, 255, 255)));
}
}
public void ImportingColorTest()
{
{
var roughnessFactor = 1.0f;
Assert.That(
OcclusionMetallicRoughnessConverter.ImportPixel(new Color32(255, 255, 255, 255), 1.0f, roughnessFactor, default),
// r <- 255 : Same metallic (src.r)
// g <- 0 : (Unused)
// b <- 0 : (Unused)
// a <- 0 : ((1 - sqrt(src.g(as float) * roughnessFactor)))(as uint8)
Is.EqualTo(new Color32(255, 0, 0, 0)));
}
{
var roughnessFactor = 1.0f;
Assert.That(
OcclusionMetallicRoughnessConverter.ImportPixel(new Color32(255, 128, 255, 255), 1.0f, roughnessFactor, default),
// r <- 255 : Same metallic (src.r)
// g <- 0 : (Unused)
// b <- 0 : (Unused)
// a <- 128 : ((1 - sqrt(src.g(as float) * roughnessFactor)))(as uint8)
Is.EqualTo(new Color32(255, 0, 0, 127))); // smoothness 0.5 * src.a 1.0
}
{
var roughnessFactor = 0.5f;
Assert.That(
OcclusionMetallicRoughnessConverter.ImportPixel(new Color32(255, 255, 255, 255), 1.0f, roughnessFactor, default),
// r <- 255 : Same metallic (src.r)
// g <- 0 : (Unused)
// b <- 0 : (Unused)
// a <- 74 : ((1 - sqrt(src.g(as float) * roughnessFactor)))(as uint8)
Is.EqualTo(new Color32(255, 0, 0, 127)));
}
{
var roughnessFactor = 0.0f;
Assert.That(
OcclusionMetallicRoughnessConverter.ImportPixel(new Color32(255, 255, 255, 255), 1.0f, roughnessFactor, default),
// r <- 255 : Same metallic (src.r)
// g <- 0 : (Unused)
// b <- 0 : (Unused)
// a <- 255 : ((1 - sqrt(src.g(as float) * roughnessFactor)))(as uint8)
Is.EqualTo(new Color32(255, 0, 0, 255)));
}
}
