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using System.Collections.Generic;
using System.Linq;
using UnityEngine;
namespace MeshUtility
{
public class MeshIntegrator
{
public struct SubMesh
{
public List<int> Indices;
public Material Material;
}
public class BlendShape
{
public int VertexOffset;
public string Name;
public float FrameWeight;
public Vector3[] Positions;
public Vector3[] Normals;
public Vector3[] Tangents;
}
// public List<SkinnedMeshRenderer> Renderers { get; private set; }
public List<Vector3> Positions { get; private set; }
public List<Vector3> Normals { get; private set; }
public List<Vector2> UV { get; private set; }
public List<Vector4> Tangents { get; private set; }
public List<BoneWeight> BoneWeights { get; private set; }
public List<SubMesh> SubMeshes
{
get;
private set;
}
public List<Matrix4x4> BindPoses { get; private set; }
public List<Transform> Bones { get; private set; }
public List<BlendShape> BlendShapes { get; private set; }
public void AddBlendShapesToMesh(Mesh mesh)
{
Dictionary<string, BlendShape> map = new Dictionary<string, BlendShape>();
foreach (var x in BlendShapes)
{
BlendShape bs = null;
if (!map.TryGetValue(x.Name, out bs))
{
bs = new BlendShape();
bs.Positions = new Vector3[Positions.Count];
bs.Normals = new Vector3[Normals.Count];
bs.Tangents = new Vector3[Tangents.Count];
bs.Name = x.Name;
bs.FrameWeight = x.FrameWeight;
map.Add(x.Name, bs);
}
var j = x.VertexOffset;
for (int i = 0; i < x.Positions.Length; ++i, ++j)
{
bs.Positions[j] = x.Positions[i];
bs.Normals[j] = x.Normals[i];
bs.Tangents[j] = x.Tangents[i];
}
}
foreach (var kv in map)
{
//Debug.LogFormat("AddBlendShapeFrame: {0}", kv.Key);
mesh.AddBlendShapeFrame(kv.Key, kv.Value.FrameWeight,
kv.Value.Positions, kv.Value.Normals, kv.Value.Tangents);
}
}
public MeshIntegrator()
{
// Renderers = new List<SkinnedMeshRenderer>();
Positions = new List<Vector3>();
Normals = new List<Vector3>();
UV = new List<Vector2>();
Tangents = new List<Vector4>();
BoneWeights = new List<BoneWeight>();
SubMeshes = new List<SubMesh>();
BindPoses = new List<Matrix4x4>();
Bones = new List<Transform>();
BlendShapes = new List<BlendShape>();
}
static BoneWeight AddBoneIndexOffset(BoneWeight bw, int boneIndexOffset)
{
if (bw.weight0 > 0) bw.boneIndex0 += boneIndexOffset;
if (bw.weight1 > 0) bw.boneIndex1 += boneIndexOffset;
if (bw.weight2 > 0) bw.boneIndex2 += boneIndexOffset;
if (bw.weight3 > 0) bw.boneIndex3 += boneIndexOffset;
return bw;
}
public void Push(MeshRenderer renderer)
{
var meshFilter = renderer.GetComponent<MeshFilter>();
if (meshFilter == null)
{
Debug.LogWarningFormat("{0} has no mesh filter", renderer.name);
return;
}
var mesh = meshFilter.sharedMesh;
if (mesh == null)
{
Debug.LogWarningFormat("{0} has no mesh", renderer.name);
return;
}
var indexOffset = Positions.Count;
var boneIndexOffset = Bones.Count;
Positions.AddRange(mesh.vertices
.Select(x => renderer.transform.TransformPoint(x))
);
Normals.AddRange(mesh.normals
.Select(x => renderer.transform.TransformVector(x))
);
UV.AddRange(mesh.uv);
Tangents.AddRange(mesh.tangents
.Select(t =>
{
var v = renderer.transform.TransformVector(t.x, t.y, t.z);
return new Vector4(v.x, v.y, v.z, t.w);
})
);
var self = renderer.transform;
var bone = self.parent;
if (bone == null)
{
Debug.LogWarningFormat("{0} is root gameobject.", self.name);
return;
}
var bindpose = bone.worldToLocalMatrix;
BoneWeights.AddRange(Enumerable.Range(0, mesh.vertices.Length)
.Select(x => new BoneWeight()
{
boneIndex0 = Bones.Count,
weight0 = 1,
})
);
BindPoses.Add(bindpose);
Bones.Add(bone);
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i).Select(x => x + indexOffset);
var mat = renderer.sharedMaterials[i];
var sameMaterialSubMeshIndex = SubMeshes.FindIndex(x => ReferenceEquals(x.Material, mat));
if (sameMaterialSubMeshIndex >= 0)
{
SubMeshes[sameMaterialSubMeshIndex].Indices.AddRange(indices);
}
else
{
SubMeshes.Add(new SubMesh
{
Indices = indices.ToList(),
Material = mat,
});
}
}
}
public void Push(SkinnedMeshRenderer renderer)
{
var mesh = renderer.sharedMesh;
if (mesh == null)
{
Debug.LogWarningFormat("{0} has no mesh", renderer.name);
return;
}
// Renderers.Add(renderer);
var indexOffset = Positions.Count;
var boneIndexOffset = Bones.Count;
Positions.AddRange(mesh.vertices);
Normals.AddRange(mesh.normals);
UV.AddRange(mesh.uv);
Tangents.AddRange(mesh.tangents);
if (mesh.vertexCount == mesh.boneWeights.Length)
{
BoneWeights.AddRange(mesh.boneWeights.Select(x => AddBoneIndexOffset(x, boneIndexOffset)).ToArray());
BindPoses.AddRange(mesh.bindposes);
Bones.AddRange(renderer.bones);
}
else
{
// Bone Count 0 の SkinnedMeshRenderer
var rigidBoneWeight = new BoneWeight
{
boneIndex0 = boneIndexOffset,
weight0 = 1f,
};
BoneWeights.AddRange(Enumerable.Range(0, mesh.vertexCount).Select(x => rigidBoneWeight).ToArray());
BindPoses.Add(renderer.transform.localToWorldMatrix);
Bones.Add(renderer.transform);
}
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i).Select(x => x + indexOffset);
var mat = renderer.sharedMaterials[i];
var sameMaterialSubMeshIndex = SubMeshes.FindIndex(x => ReferenceEquals(x.Material, mat));
if (sameMaterialSubMeshIndex >= 0)
{
SubMeshes[sameMaterialSubMeshIndex].Indices.AddRange(indices);
}
else
{
SubMeshes.Add(new SubMesh
{
Indices = indices.ToList(),
Material = mat,
});
}
}
for (int i = 0; i < mesh.blendShapeCount; ++i)
{
var positions = (Vector3[])mesh.vertices.Clone();
var normals = (Vector3[])mesh.normals.Clone();
var tangents = mesh.tangents.Select(x => (Vector3)x).ToArray();
mesh.GetBlendShapeFrameVertices(i, 0, positions, normals, tangents);
BlendShapes.Add(new BlendShape
{
VertexOffset = indexOffset,
FrameWeight = mesh.GetBlendShapeFrameWeight(i, 0),
Name = mesh.GetBlendShapeName(i),
Positions = positions,
Normals = normals,
Tangents = tangents,
});
}
}
}
}
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