//----------------------------------------------------------------------------
void GeoObjFactory::UpdateCtrlColor1(Movable *mov, Float4 color)
{
PX2::Node *node = DynamicCast<Node>(mov);
if (!node)
return;
for (int i = 0; i < node->GetNumChildren(); i++)
{
PX2::Movable *child = node->GetChild(i);
PX2::TriMesh *mesh = DynamicCast<TriMesh>(child);
if (mesh)
{
VertexBuffer *vBuffer = mesh->GetVertexBuffer();
VertexFormat *vf = PX2_GR.GetVertexFormat(GraphicsRoot::VFT_PC);
VertexBufferAccessor vba(vf, vBuffer);
for (int i = 0; i < vBuffer->GetNumElements(); i++)
{
vba.Color<Float4>(0, i) = color;
}
Renderer::UpdateAll(vBuffer);
}
}
}
//----------------------------------------------------------------------------
void SceneBuilder::ProcessSkin(INode *node, Modifier *skinMod)
{
// 构造皮肤控制器。如果Max的网格被按照材质细分，每一个网格都需要自己的蒙皮
// 信息控制器。蒙皮信息中的offset，在动画起始时被计算，是骨骼的世界变换。
//
// node:
// 指向蒙皮修改器指向的Max中的节点。
// skinMod:
// 指向蒙皮修改器
// 1. 获得max蒙皮信息中的骨骼，对应的在Phoenix的骨骼节点列表
// 2. 获得maxNode影响的Phoenix网格
// 3. 获得max中每个骨骼所影响的Phoenix网格中的顶点的数量，忽略不受蒙皮信息
// 影响的网格
// 4. 计算Phoenix mesh的蒙皮信息，生成SkinControl，AttachController到
// Phoenix mesh上。
// 1
bool needDel;
TriObject *triObj = GetTriObject(node, &needDel);
Mesh *maxMesh = &triObj->GetMesh();
// Max皮肤控制器接口
ISkin *skin = (ISkin*)skinMod->GetInterface(I_SKIN);
ISkinContextData *skinData = skin->GetContextInterface(node);
// max Skin Bones -> Phoenix2 Skin Bones
int b, numSkinBone = skin->GetNumBones();
PX2::Node **bones = new1<PX2::Node*>(numSkinBone);
for (b=0; b<numSkinBone; b++)
{
INode *boneNode = skin->GetBone(b);
const std::string &boneName = boneNode->GetName();
PX2::Node *node = PX2::StaticCast<PX2::Node>(mScene->GetObjectByName(boneName));
bones[b] = node;
}
// 1
// 获得maxNode相关联的Phoenix mesh
std::vector<PX2::TriMesh*> meshes;
PX2::Object *object = mScene->GetObjectByName(node->GetName());
if (object->IsExactly(PX2::TriMesh::TYPE))
{
meshes.push_back(PX2::StaticCast<PX2::TriMesh>(object));
}
else
{
PX2::Node *node = PX2::StaticCast<PX2::Node>(object);
const char *nName = node->GetName().c_str();
for (int c=0; c<node->GetNumChildren(); c++)
{
PX2::Movable *child = node->GetChild(c);
const char *cName = child->GetName().c_str();
if (strncmp(cName, nName, strlen(nName)) == 0) // 这里必须是strlen(nName),因为子节点有_1,_2
{
meshes.push_back(PX2::StaticCast<PX2::TriMesh>(child));
}
}
}
// 为Phoenix2的每个网格建立相关的皮肤控制器
int *boneInfuseNumVert = new1<int>(numSkinBone);
for (int m=0; m<(int)meshes.size(); m++)
{
PX2::TriMesh *mesh = meshes[m];
// Phoenix顶点在max顶点中的索引
PX2::VertexBuffer *vb = mesh->GetVertexBuffer();
int px2MeshVertexNum = vb->GetNumElements();
std::vector<int> MaxVertexIndex; // i->max索引
int v, i, j, k;
PX2::VertexBufferAccessor vba(mesh->GetVertexFormat(), vb);
// 3
for (int v=0; v<px2MeshVertexNum; ++v)
{
Float3 &position = vba.Position<Float3>(v);
for (i=0; i<maxMesh->getNumVerts(); i++)
{
if (position[0] == maxMesh->verts[i].x
&& position[1] == maxMesh->verts[i].y
&& position[2] == maxMesh->verts[i].z)
{
MaxVertexIndex.push_back(i);
break;
}
}
}
// 确定每个骨骼所影响的顶点数量
int maxVertexSize = (int)MaxVertexIndex.size();
memset(boneInfuseNumVert, 0, sizeof(int)*numSkinBone);
for (i=0; i<maxVertexSize; i++)
{
v = MaxVertexIndex[i];
for (j=0; j<skinData->GetNumAssignedBones(v); j++)
{ // 这个max中的顶点受到几个骨骼影响啊？！
b = skinData->GetAssignedBone(v, j); // 获得这个影响的骨骼索引(这个j是第几个)
boneInfuseNumVert[b]++; // 这个骨骼影响的顶点数量++
}
}
// (通过PX2中的顶点找到Max中的顶点，找到Max中影响该顶点的骨骼)
// 如果Max的网格是被按照材质分割的，可能一些骨骼对当前Phoenix2网格没有
// 影响
int bQuantity = 0; // 影响当前Phoenix2网格的骨骼数量
for (b=0; b<numSkinBone; b++)
{
if (boneInfuseNumVert[b] > 0)
bQuantity++;
}
if (bQuantity == 0)
{
// Phoenix网格不被任何骨骼影响，进入下一个网格
continue;
}
// 4
PX2::Node **theBones = new1<PX2::Node*>(bQuantity);
float **weight = new2<float>(bQuantity, maxVertexSize);
memset(weight[0],0,bQuantity*maxVertexSize*sizeof(float));
PX2::APoint **offset = new2<PX2::APoint>(bQuantity, maxVertexSize);
memset(offset[0],0,bQuantity*maxVertexSize*sizeof(PX2::APoint));
PX2::HMatrix *mats = new1<PX2::HMatrix>(bQuantity);
// 计算max骨骼到Phoenix骨骼对应的索引(k)
std::vector<int> bIArray(numSkinBone);
for (b=0, k=0; b<numSkinBone; b++)
{
if (boneInfuseNumVert[b] > 0)
{
theBones[k] = bones[b]; // 获取对Mesh有影响的骨骼
bIArray[b] = k; // max bone index -> px2 可用bone index
HMatrix boneWorldMat = theBones[k]->WorldTransform.Matrix();
HMatrix meshWorldMat = mesh->WorldTransform.Matrix();
mats[k] = boneWorldMat.Inverse() * meshWorldMat;
k++;
}
}
// 遍历顶点，计算顶点权重和offset
for (i=0; i<maxVertexSize; i++)
{
v = MaxVertexIndex[i];
for (j=0; j<skinData->GetNumAssignedBones(v); j++)
{ // 遍历影响该Max顶点的骨骼
b = skinData->GetAssignedBone(v, j);
k = bIArray[b];
float wit = skinData->GetBoneWeight(v, j); // 第j个骨骼的影响权重
weight[i][k] = wit;
Float3 &position = vba.Position<Float3>(i);
APoint point = theBones[k]->WorldTransform.Inverse()
* (mesh->WorldTransform * APoint(position));
offset[i][k] = Float3(point.X(), point.Y(), point.Z()); // 在所受影响骨骼中的位置
}
}
PX2::SkinController *skinCtrl = new0 PX2::SkinController
(maxVertexSize, bQuantity);
skinCtrl->SetName("SkinController");
for (int i=0; i<bQuantity; i++)
{
skinCtrl->GetBones()[i] = theBones[i];
skinCtrl->GetTMMatrixs()[i] = mats[i];
}
// offset
for (int i=0; i<maxVertexSize; i++)
{
for (int j=0; j<bQuantity; j++)
{
skinCtrl->GetWeights()[i][j] = weight[i][j];
skinCtrl->GetOffsets()[i][j] = offset[i][j];
}
}
// index weights
for (int i=0; i<maxVertexSize; i++)
{
Float4 inds = Float4(0.0f, 0.0f, 0.0f, 0.0f);
Float4 wights = Float4(0.0f, 0.0f, 0.0f, 0.0f);
In *pSortBone = new In[bQuantity];
for (int j=0; j<bQuantity; j++)
{
pSortBone[j].index = j;
pSortBone[j].data = weight[i][j];
}
qsort(pSortBone, bQuantity, sizeof(pSortBone[0]), cmp);
int useBoneNum = bQuantity;
if (useBoneNum > 4)
useBoneNum = 4;
float allWeight = 0.0f;
for (int useBoneIndex=0; useBoneIndex<useBoneNum; useBoneIndex++)
{
allWeight += pSortBone[useBoneIndex].data;
}
if (allWeight <= 0.0f)
allWeight = 1.0f;
for (int useBoneIndex=0; useBoneIndex<useBoneNum; useBoneIndex++)
{
inds[useBoneIndex] = (float)(pSortBone[useBoneIndex].index);
wights[useBoneIndex] = pSortBone[useBoneIndex].data/allWeight;
}
vba.TCoord<Float4>(1, i) = inds;
vba.TCoord<Float4>(2, i) = wights;
delete [] pSortBone;
}
skinCtrl->Repeat = Controller::RT_WRAP;
skinCtrl->MinTime = 0.0f;
skinCtrl->MaxTime = TicksToSec(mTimeEnd - mTimeStart);
mesh->AttachController(skinCtrl);
delete1(theBones);
delete2(weight);
delete2(offset);
delete1(mats);
}
if (needDel)
{
delete0(triObj);
}
delete1(bones);
delete1(boneInfuseNumVert);
}