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Compose character diffuse

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This commit is contained in:
ackwell 2024-01-13 16:11:51 +11:00
parent c6642c4fa3
commit c8e58c08a0
1 changed files with 36 additions and 4 deletions
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40
Penumbra/Import/Models/Export/MaterialExporter.cs
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@ -34,19 +34,51 @@ public class MaterialExporter
private static MaterialBuilder BuildCharacter(Material material, string name)
{
// TODO: pixelbashing time
var sampler = material.Samplers
var table = material.Mtrl.Table;
var normal = material.Samplers
.Where(s => s.Usage == TextureUsage.SamplerNormal)
.First();
.First()
.Texture;
var baseColorTarget = new Image<Rgba32>(normal.Width, normal.Height);
normal.ProcessPixelRows(baseColorTarget, (sourceAccessor, targetAccessor) =>
{
for (int y = 0; y < sourceAccessor.Height; y++)
{
var sourceRow = sourceAccessor.GetRowSpan(y);
var targetRow = targetAccessor.GetRowSpan(y);
for (int x = 0; x < sourceRow.Length; x++)
{
var (smoothed, stepped) = GetTableRowIndices(sourceRow[x].A / 255f);
var prevRow = table[(int)MathF.Floor(smoothed)];
var nextRow = table[(int)MathF.Ceiling(smoothed)];
var lerpedDiffuse = Vector3.Lerp(prevRow.Diffuse, nextRow.Diffuse, smoothed % 1);
targetRow[x].FromVector4(new Vector4(lerpedDiffuse, 1));
}
}
});
// TODO: clean up this name generation a bunch. probably a method.
var imageName = name.Replace("/", "");
var baseColor = BuildImage(sampler.Texture, $"{imageName}_basecolor");
var baseColor = BuildImage(baseColorTarget, $"{imageName}_basecolor");
return BuildSharedBase(material, name)
.WithBaseColor(baseColor);
}
private static (float Smooth, float Stepped) GetTableRowIndices(float input)
{
// These calculations are ported from character.shpk.
var smoothed = MathF.Floor(((input * 7.5f) % 1.0f) * 2)
* (-input * 15 + MathF.Floor(input * 15 + 0.5f))
+ input * 15;
var stepped = MathF.Floor(smoothed + 0.5f);
return (smoothed, stepped);
}
private static MaterialBuilder BuildFallback(Material material, string name)
{
Penumbra.Log.Warning($"Unhandled shader package: {material.Mtrl.ShaderPackage.Name}");