| public static FloatsToMatrix ( float items ) : Matrix4 | ||
| items | float | |
| return | Matrix4 | |
private void UpdateOBBs(Skeleton skeleton, Mesh mesh)
{
if (mesh.BoneBindings == null || mesh.BoneBindings.Count == 0)
{
return;
}
var obbs = new List <OBB>(mesh.BoneBindings.Count);
for (var i = 0; i < mesh.BoneBindings.Count; i++)
{
obbs.Add(new OBB
{
Min = new Vector3(1000.0f, 1000.0f, 1000.0f),
Max = new Vector3(-1000.0f, -1000.0f, -1000.0f),
});
}
foreach (var vert in mesh.PrimaryVertexData.Vertices)
{
for (var i = 0; i < 4; i++)
{
if (vert.BoneWeights[i] > 0)
{
var bi = vert.BoneIndices[i];
var obb = obbs[bi];
obb.NumVerts++;
var bone = skeleton.GetBoneByName(mesh.BoneBindings[bi].BoneName);
var invWorldTransform = ColladaHelpers.FloatsToMatrix(bone.InverseWorldTransform);
var transformed = Vector3.Transform(vert.Position, invWorldTransform);
obb.Min.X = Math.Min(obb.Min.X, transformed.X);
obb.Min.Y = Math.Min(obb.Min.Y, transformed.Y);
obb.Min.Z = Math.Min(obb.Min.Z, transformed.Z);
obb.Max.X = Math.Max(obb.Max.X, transformed.X);
obb.Max.Y = Math.Max(obb.Max.Y, transformed.Y);
obb.Max.Z = Math.Max(obb.Max.Z, transformed.Z);
}
}
}
for (var i = 0; i < obbs.Count; i++)
{
var obb = obbs[i];
if (obb.NumVerts > 0)
{
mesh.BoneBindings[i].OBBMin = new float[] { obb.Min.X, obb.Min.Y, obb.Min.Z };
mesh.BoneBindings[i].OBBMax = new float[] { obb.Max.X, obb.Max.Y, obb.Max.Z };
}
else
{
mesh.BoneBindings[i].OBBMin = new float[] { 0.0f, 0.0f, 0.0f };
mesh.BoneBindings[i].OBBMax = new float[] { 0.0f, 0.0f, 0.0f };
}
}
}
private void ImportSkin(Root root, skin skin)
{
if (skin.source1[0] != '#')
{
throw new ParsingException("Only ID references are supported for skin geometries");
}
Mesh mesh = null;
if (!ColladaGeometries.TryGetValue(skin.source1.Substring(1), out mesh))
{
throw new ParsingException("Skin references nonexistent mesh: " + skin.source1);
}
if (!mesh.VertexFormat.HasBoneWeights)
{
var msg = String.Format("Tried to apply skin to mesh ({0}) with non-skinned vertices",
mesh.Name);
throw new ParsingException(msg);
}
var sources = new Dictionary <String, ColladaSource>();
foreach (var source in skin.source)
{
var src = ColladaSource.FromCollada(source);
sources.Add(src.id, src);
}
List <Bone> joints = null;
List <Matrix4> invBindMatrices = null;
foreach (var input in skin.joints.input)
{
if (input.source[0] != '#')
{
throw new ParsingException("Only ID references are supported for joint input sources");
}
ColladaSource inputSource = null;
if (!sources.TryGetValue(input.source.Substring(1), out inputSource))
{
throw new ParsingException("Joint input source does not exist: " + input.source);
}
if (input.semantic == "JOINT")
{
List <string> jointNames = inputSource.NameParams.Values.SingleOrDefault();
if (jointNames == null)
{
throw new ParsingException("Joint input source 'JOINT' must contain array of names.");
}
var skeleton = root.Skeletons[0];
joints = new List <Bone>();
foreach (var name in jointNames)
{
Bone bone = null;
var lookupName = name.Replace("_x0020_", " ");
if (!skeleton.BonesBySID.TryGetValue(lookupName, out bone))
{
throw new ParsingException("Joint name list references nonexistent bone: " + lookupName);
}
joints.Add(bone);
}
}
else if (input.semantic == "INV_BIND_MATRIX")
{
invBindMatrices = inputSource.MatrixParams.Values.SingleOrDefault();
if (invBindMatrices == null)
{
throw new ParsingException("Joint input source 'INV_BIND_MATRIX' must contain a single array of matrices.");
}
}
else
{
throw new ParsingException("Unsupported joint semantic: " + input.semantic);
}
}
if (joints == null)
{
throw new ParsingException("Required joint input semantic missing: JOINT");
}
if (invBindMatrices == null)
{
throw new ParsingException("Required joint input semantic missing: INV_BIND_MATRIX");
}
var influenceCounts = ColladaHelpers.StringsToIntegers(skin.vertex_weights.vcount);
var influences = ColladaHelpers.StringsToIntegers(skin.vertex_weights.v);
foreach (var count in influenceCounts)
{
if (count > 4)
{
throw new ParsingException("GR2 only supports at most 4 vertex influences");
}
}
// TODO
if (influenceCounts.Count != mesh.OriginalToConsolidatedVertexIndexMap.Count)
{
Utils.Warn(String.Format("Vertex influence count ({0}) differs from vertex count ({1})", influenceCounts.Count, mesh.OriginalToConsolidatedVertexIndexMap.Count));
}
List <Single> weights = null;
int jointInputIndex = -1, weightInputIndex = -1;
foreach (var input in skin.vertex_weights.input)
{
if (input.semantic == "JOINT")
{
jointInputIndex = (int)input.offset;
}
else if (input.semantic == "WEIGHT")
{
weightInputIndex = (int)input.offset;
if (input.source[0] != '#')
{
throw new ParsingException("Only ID references are supported for weight input sources");
}
ColladaSource inputSource = null;
if (!sources.TryGetValue(input.source.Substring(1), out inputSource))
{
throw new ParsingException("Weight input source does not exist: " + input.source);
}
if (!inputSource.FloatParams.TryGetValue("WEIGHT", out weights))
{
weights = inputSource.FloatParams.Values.SingleOrDefault();
}
if (weights == null)
{
throw new ParsingException("Weight input source " + input.source + " must have WEIGHT float attribute");
}
}
else
{
throw new ParsingException("Unsupported skin input semantic: " + input.semantic);
}
}
if (jointInputIndex == -1)
{
throw new ParsingException("Required vertex weight input semantic missing: JOINT");
}
if (weightInputIndex == -1)
{
throw new ParsingException("Required vertex weight input semantic missing: WEIGHT");
}
// Remove bones that are not actually influenced from the binding list
var boundBones = new HashSet <Bone>();
int offset = 0;
int stride = skin.vertex_weights.input.Length;
while (offset < influences.Count)
{
var jointIndex = influences[offset + jointInputIndex];
var weightIndex = influences[offset + weightInputIndex];
var joint = joints[jointIndex];
var weight = weights[weightIndex];
if (!boundBones.Contains(joint))
{
boundBones.Add(joint);
}
offset += stride;
}
if (boundBones.Count > 127)
{
throw new ParsingException("D:OS supports at most 127 bound bones per mesh.");
}
mesh.BoneBindings = new List <BoneBinding>();
var boneToIndexMaps = new Dictionary <Bone, int>();
for (var i = 0; i < joints.Count; i++)
{
if (boundBones.Contains(joints[i]))
{
// Collada allows one inverse bind matrix for each skin, however Granny
// only has one matrix for one bone, even if said bone is used from multiple meshes.
// Hopefully the Collada ones are all equal ...
var iwt = invBindMatrices[i];
// iwt.Transpose();
joints[i].InverseWorldTransform = new float[] {
iwt[0, 0], iwt[1, 0], iwt[2, 0], iwt[3, 0],
iwt[0, 1], iwt[1, 1], iwt[2, 1], iwt[3, 1],
iwt[0, 2], iwt[1, 2], iwt[2, 2], iwt[3, 2],
iwt[0, 3], iwt[1, 3], iwt[2, 3], iwt[3, 3]
};
// Bind all bones that affect vertices to the mesh, so we can reference them
// later from the vertexes BoneIndices.
var binding = new BoneBinding();
binding.BoneName = joints[i].Name;
// TODO
// Use small bounding box values, as it interferes with object placement
// in D:OS 2 (after the Gift Bag 2 update)
binding.OBBMin = new float[] { -0.1f, -0.1f, -0.1f };
binding.OBBMax = new float[] { 0.1f, 0.1f, 0.1f };
mesh.BoneBindings.Add(binding);
boneToIndexMaps.Add(joints[i], boneToIndexMaps.Count);
}
}
offset = 0;
for (var vertexIndex = 0; vertexIndex < influenceCounts.Count; vertexIndex++)
{
var influenceCount = influenceCounts[vertexIndex];
float influenceSum = 0.0f;
for (var i = 0; i < influenceCount; i++)
{
var weightIndex = influences[offset + i * stride + weightInputIndex];
influenceSum += weights[weightIndex];
}
for (var i = 0; i < influenceCount; i++)
{
var jointIndex = influences[offset + jointInputIndex];
var weightIndex = influences[offset + weightInputIndex];
var joint = joints[jointIndex];
var weight = weights[weightIndex] / influenceSum;
// Not all vertices are actually used in triangles, we may have unused verts in the
// source list (though this is rare) which won't show up in the consolidated vertex map.
if (mesh.OriginalToConsolidatedVertexIndexMap.TryGetValue(vertexIndex, out List <int> consolidatedIndices))
{
foreach (var consolidatedIndex in consolidatedIndices)
{
var vertex = mesh.PrimaryVertexData.Vertices[consolidatedIndex];
vertex.AddInfluence((byte)boneToIndexMaps[joint], weight);
}
}
offset += stride;
}
}
foreach (var vertex in mesh.PrimaryVertexData.Vertices)
{
vertex.FinalizeInfluences();
}
// Warn if we have vertices that are not influenced by any bone
int notInfluenced = 0;
foreach (var vertex in mesh.PrimaryVertexData.Vertices)
{
if (vertex.BoneWeights[0] == 0)
{
notInfluenced++;
}
}
if (notInfluenced > 0)
{
Utils.Warn(String.Format("{0} vertices are not influenced by any bone", notInfluenced));
}
if (skin.bind_shape_matrix != null)
{
var bindShapeFloats = skin.bind_shape_matrix.Trim().Split(new char[] { ' ' }).Select(s => Single.Parse(s)).ToArray();
var bindShapeMat = ColladaHelpers.FloatsToMatrix(bindShapeFloats);
bindShapeMat.Transpose();
// Deform geometries that were affected by our bind shape matrix
mesh.PrimaryVertexData.Transform(bindShapeMat);
}
if (Options.RecalculateOBBs)
{
UpdateOBBs(root.Skeletons.Single(), mesh);
}
}
private skin ExportSkin(Mesh mesh, List <Bone> bones, Dictionary <string, Bone> nameMaps, string geometryId)
{
var sources = new List <source>();
var joints = new List <string>();
var poses = new List <float>();
var boundBones = new HashSet <string>();
var orderedBones = new List <Bone>();
foreach (var boneBinding in mesh.BoneBindings)
{
boundBones.Add(boneBinding.BoneName);
orderedBones.Add(nameMaps[boneBinding.BoneName]);
}
/*
* Append all bones to the end of the bone list, even if they're not influencing the mesh.
* We need this because some tools (eg. Blender) expect all bones to be present, otherwise their
* inverse world transform would reset to identity.
*/
foreach (var bone in bones)
{
if (!boundBones.Contains(bone.Name))
{
orderedBones.Add(bone);
}
}
foreach (var bone in orderedBones)
{
boundBones.Add(bone.Name);
joints.Add(bone.Name);
var invWorldTransform = ColladaHelpers.FloatsToMatrix(bone.InverseWorldTransform);
invWorldTransform.Transpose();
poses.AddRange(new float[] {
invWorldTransform.M11, invWorldTransform.M12, invWorldTransform.M13, invWorldTransform.M14,
invWorldTransform.M21, invWorldTransform.M22, invWorldTransform.M23, invWorldTransform.M24,
invWorldTransform.M31, invWorldTransform.M32, invWorldTransform.M33, invWorldTransform.M34,
invWorldTransform.M41, invWorldTransform.M42, invWorldTransform.M43, invWorldTransform.M44
});
}
var jointSource = ColladaUtils.MakeNameSource(mesh.Name, "joints", new string[] { "JOINT" }, joints.ToArray());
var poseSource = ColladaUtils.MakeFloatSource(mesh.Name, "poses", new string[] { "TRANSFORM" }, poses.ToArray(), 16, "float4x4");
var weightsSource = mesh.PrimaryVertexData.MakeBoneWeights(mesh.Name);
var vertices = mesh.PrimaryVertexData.Deduplicator.DeduplicatedPositions;
var vertexInfluenceCounts = new List <int>(vertices.Count);
var vertexInfluences = new List <int>(vertices.Count);
int weightIdx = 0;
foreach (var vertex in vertices)
{
int influences = 0;
var indices = vertex.BoneIndices;
var weights = vertex.BoneWeights;
for (int i = 0; i < 4; i++)
{
if (weights[i] > 0)
{
influences++;
vertexInfluences.Add(indices[i]);
vertexInfluences.Add(weightIdx++);
}
}
vertexInfluenceCounts.Add(influences);
}
var jointOffsets = new InputLocalOffset();
jointOffsets.semantic = "JOINT";
jointOffsets.source = "#" + jointSource.id;
jointOffsets.offset = 0;
var weightOffsets = new InputLocalOffset();
weightOffsets.semantic = "WEIGHT";
weightOffsets.source = "#" + weightsSource.id;
weightOffsets.offset = 1;
var vertWeights = new skinVertex_weights();
vertWeights.count = (ulong)vertices.Count;
vertWeights.input = new InputLocalOffset[] { jointOffsets, weightOffsets };
vertWeights.v = string.Join(" ", vertexInfluences.Select(x => x.ToString()).ToArray());
vertWeights.vcount = string.Join(" ", vertexInfluenceCounts.Select(x => x.ToString()).ToArray());
var skin = new skin();
skin.source1 = "#" + geometryId;
skin.bind_shape_matrix = "1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1";
var skinJoints = new skinJoints();
var skinJointInput = new InputLocal();
skinJointInput.semantic = "JOINT";
skinJointInput.source = "#" + jointSource.id;
var skinInvBindInput = new InputLocal();
skinInvBindInput.semantic = "INV_BIND_MATRIX";
skinInvBindInput.source = "#" + poseSource.id;
skinJoints.input = new InputLocal[] { skinJointInput, skinInvBindInput };
skin.joints = skinJoints;
skin.source = new source[] { jointSource, poseSource, weightsSource };
skin.vertex_weights = vertWeights;
return(skin);
}
