阅读 Advanced Animation
谈到SkinWeights里面的TransformMatrix的时候一W带q，我始l不理解q个matrix有何用处Q因为我感觉所有的点变换都被 Frame里面的阶层体pd?那么SkinWeights里面的matrix有什么用?/p>
l过我一个晚上的思考，看了GameDev论坛的帖子，l于理解了?/p>
首先讲徏模，建模建出来的是一些顶点，q些点l成了最原始的mesh?/p>
最原始的mesh中有SkinWeights信息
SkinWeights
{
名字Q?/p>
影响的顶Ҏ(gu)Q?/p>
点的烦引；//是影响了几个顶?/p>
点权重Q?/乘以Frame TransformMatrix的百分比
最后就是一?*4的矩阵；
}
q个4*4矩阵是这旉骼在 Mesh中的位置的逆矩阵，也就是相对于 local坐标pR?/p>
我说的明白点Q手腕是个骨|手指是手腕影响的顶炏V就是一个点,vetexQ在自n坐标pM?/p>
那么?手指这个点 * SkinWeightsMatrix 得到的就是个位置Q什么位|？q当于把手腕连带指移到坐标原炏V当Ӟ手腕在坐标原点的位置?/p>
至于Frame中存储的阶层体系矩阵是现在骨骼的位|?/p>
扑ֈ现在手腕骨骼的矩? 手指Vertex* SkinWeighsMatrix*(肩膀的Matrix*背肘的matrix*手腕的matrix)Q?/p>
那么手指自然就变换C相应的位|?/p>
我说得这么通俗Q不知道传达到思想没？
参考链?/p>
http://www.gamedev.net/community/forums/topic.asp?topic_id=479158
http://www.gamedev.net/community/forums/topic.asp?topic_id=392242
最后感慨下QGameDev的论坛果然是好地?/p>
q样明显是不好的Q前几天我开始构q点d3d库，构徏了些许类之后发现把它们都攑֜当前目录Q也是工程目录下市不好的，应该把它们分cM下?/p>
于是我试了下Q新Z个文件夹Q然后把。h丢进厅R?/p>
l果发现在cpp文g?#include “*****.h”不能~译通过。后来觉得VS里一定有讄L.h,路径的设|?/p>
于是?/p>
在property内看C相应讄Q如?/p>
看到 Additional那个选项没，在那里添加设|\径的地方Q将.h.cpp所在的文g夹包含进d行了?/p>
如图
后来遇到了个预编译头的问题，见上文章吧?
]]>
׃一个早上的旉Q终于将路径库扩充完毕?/p>
再次感叹一下Animation 那本书实在是太好了?/p>
途中的茶壶会(x)按照自己在外部文件中定义的\径走Q有直线Q有曲线?/p>
外部txt是这样定义的
xof 0303txt 0032
template Path {
<F8569BED-53B6-4923-AF0B-59A09271D556>
DWORD Type; // 0=straight, 1=curved
Vector Start;
Vector Point1;
Vector Point2;
Vector End;
}
template Route {
<18AA1C92-16AB-47a3-B002-6178F9D2D12F>
DWORD NumPaths;
array Path Paths[NumPaths];
}
Route Robot {
5; // 5 paths
0; // Straight path type
0.0, 10.0, 0.0; // Start
0.0, 10.0, 0.0; // Unused
0.0, 10.0, 0.0; // Unused
0.0, 10.0, 150.0;, // End
1; // Curved path type
0.0, 10.0, 150.0; // Start
75.0, 10.0, 150.0; // Point1
150.0, 10.0, 75.0; // Point2
150.0, 10.0, 0.0;, // End
1; // Curved path type
150.0, 10.0, 0.0; // Start
150.0, 10.0, -75.0; // Point1
75.0, 10.0, -150.0; // Point2
0.0, 10.0, -150.0;, // End
0; // Straight path type
0.0, 10.0, -150.0; // Start
0.0, 10.0, 0.0; // Unused
0.0, 10.0, 0.0; // Unused
-150.0, 10.0, 75.0;, // End
0; // Straight path type
-150.0, 10.0, 75.0; // Start
0.0, 10.0, 0.0; // Unused
0.0, 10.0, 0.0; // Unused
0.0, 10.0, 0.0;; // End
}
然后用个c解析，Ҏ(gu)旉插值就行了?br>
]]>
利用上篇文章的D3DXMESHCONTAINER_EXQLoadMesh和DrawMesh都是单的基础cd敎ͼ
以后׃用每ơ蝲入的时候都写那一大堆q_的代码?br>
HRESULT LoadMesh(
D3DXMESHCONTAINER_EX **ppMesh,
IDirect3DDevice9 *pDevice,
char *Filename, char *TexturePath /* = */,
DWORD NewFVF /* = 0 */, DWORD LoadFlags /* = D3DXMESH_SYSTEMMEM */
)
{
ID3DXMesh *pLoadMesh = NULL;
HRESULT hr;
// Error checking
if(!ppMesh || !pDevice || !Filename || !TexturePath)
return E_FAIL;
// Use system memory if converting FVF
DWORD TempLoadFlags = LoadFlags;
if(NewFVF)
TempLoadFlags = D3DXMESH_SYSTEMMEM;
// Load the mesh using D3DX routines
ID3DXBuffer *MaterialBuffer = NULL, *AdjacencyBuffer = NULL;
DWORD NumMaterials;
if(FAILED(hr=D3DXLoadMeshFromXA(Filename, TempLoadFlags,
pDevice, &AdjacencyBuffer,
&MaterialBuffer, NULL,
&NumMaterials, &pLoadMesh)))
return hr;
// Convert to new FVF first as needed
if(NewFVF) {
ID3DXMesh *pTempMesh;
// Use CloneMeshFVF to convert mesh
if(FAILED(hr=pLoadMesh->CloneMeshFVF(LoadFlags, NewFVF, pDevice, &pTempMesh))) {
ReleaseCOM(AdjacencyBuffer);
ReleaseCOM(MaterialBuffer);
ReleaseCOM(pLoadMesh);
return hr;
}
// Free prior mesh and store new pointer
ReleaseCOM(pLoadMesh);
pLoadMesh = pTempMesh; pTempMesh = NULL;
}
// Allocate a D3DXMESHCONTAINER_EX structure
D3DXMESHCONTAINER_EX *pMesh = new D3DXMESHCONTAINER_EX();
*ppMesh = pMesh;
// Store mesh name (filename), type, and mesh pointer
pMesh->Name = _strdup(Filename);
pMesh->MeshData.Type = D3DXMESHTYPE_MESH;
pMesh->MeshData.pMesh = pLoadMesh; pLoadMesh = NULL;
// Store adjacency buffer
DWORD AdjSize = AdjacencyBuffer->GetBufferSize();
if(AdjSize) {
pMesh->pAdjacency = new DWORD[AdjSize];
memcpy(pMesh->pAdjacency, AdjacencyBuffer->GetBufferPointer(), AdjSize);
}
ReleaseCOM(AdjacencyBuffer);
// Build material list
if(!(pMesh->NumMaterials = NumMaterials)) {
// Create a default material
pMesh->NumMaterials = 1;
pMesh->pMaterials = new D3DXMATERIAL[1];
pMesh->pTextures = new IDirect3DTexture9*[1];
ZeroMemory(pMesh->pMaterials, sizeof(D3DXMATERIAL));
pMesh->pMaterials[0].MatD3D.Diffuse.r = 1.0f;
pMesh->pMaterials[0].MatD3D.Diffuse.g = 1.0f;
pMesh->pMaterials[0].MatD3D.Diffuse.b = 1.0f;
pMesh->pMaterials[0].MatD3D.Diffuse.a = 1.0f;
pMesh->pMaterials[0].MatD3D.Ambient = pMesh->pMaterials[0].MatD3D.Diffuse;
pMesh->pMaterials[0].MatD3D.Specular = pMesh->pMaterials[0].MatD3D.Diffuse;
pMesh->pMaterials[0].pTextureFilename = NULL;
pMesh->pTextures[0] = NULL;
} else {
// Load the materialsx
D3DXMATERIAL *Materials = (D3DXMATERIAL*)MaterialBuffer->GetBufferPointer();
pMesh->pMaterials = new D3DXMATERIAL[pMesh->NumMaterials];
pMesh->pTextures = new IDirect3DTexture9*[pMesh->NumMaterials];
for(DWORD i=0;i<pMesh->NumMaterials;i++) {
pMesh->pMaterials[i].MatD3D = Materials[i].MatD3D;
pMesh->pMaterials[i].MatD3D.Ambient = pMesh->pMaterials[i].MatD3D.Diffuse;
// Load the texture if one exists
pMesh->pTextures[i] = NULL;
if(Materials[i].pTextureFilename) {
char TextureFile[MAX_PATH];
sprintf_s(TextureFile,MAX_PATH, "%s%s", TexturePath,
Materials[i].pTextureFilename);
D3DXCreateTextureFromFileA(pDevice,
TextureFile,
&pMesh->pTextures[i]);
}
}
}
ReleaseCOM(MaterialBuffer);
// Optimize the mesh for better attribute access
pMesh->MeshData.pMesh->OptimizeInplace(D3DXMESHOPT_ATTRSORT, NULL, NULL, NULL, NULL);
// Clear pMesh pointer just in case
pMesh = NULL;
return S_OK;
}
// Draw the first mesh in a linked list of objects
HRESULT DrawMesh(D3DXMESHCONTAINER_EX *pMesh)
{
IDirect3DDevice9 *pD3DDevice;
DWORD LastState, OldAlphaState, OldSrcBlend, OldDestBlend;
// Error checking
if(!pMesh)
return E_FAIL;
if(!pMesh->MeshData.pMesh)
return E_FAIL;
if(!pMesh->NumMaterials || !pMesh->pMaterials)
return E_FAIL;
// Get the device interface
pMesh->MeshData.pMesh->GetDevice(&pD3DDevice);
// Release vertex shader if being used
pD3DDevice->SetVertexShader(NULL);
pD3DDevice->SetVertexDeclaration(NULL);
// Save render states
pD3DDevice->GetRenderState(D3DRS_ALPHABLENDENABLE, &OldAlphaState);
pD3DDevice->GetRenderState(D3DRS_SRCBLEND, &OldSrcBlend);
pD3DDevice->GetRenderState(D3DRS_DESTBLEND, &OldDestBlend);
LastState = OldAlphaState;
// Setup pointer for mesh to draw, either regular or skinned
ID3DXMesh *pDrawMesh = (!pMesh->pSkinMesh)?pMesh->MeshData.pMesh:pMesh->pSkinMesh;
// Look through all subsets
for(DWORD i=0;i<pMesh->NumMaterials;i++) {
// Set material and texture
pD3DDevice->SetMaterial(&pMesh->pMaterials[i].MatD3D);
pD3DDevice->SetTexture(0, pMesh->pTextures[i]);
// Enable or disable alpha blending per material
if(pMesh->pMaterials[i].MatD3D.Diffuse.a != 1.0f) {
if(LastState != TRUE) {
LastState = TRUE;
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE);//SRCCOLOR);
pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_DESTCOLOR);
}
} else {
if(LastState != FALSE) {
LastState = FALSE;
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
}
}
// Draw the mesh subset
pDrawMesh->DrawSubset(i);
}
// Restore alpha blending states
if(LastState != OldAlphaState) {
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, OldAlphaState);
pD3DDevice->SetRenderState(D3DRS_SRCBLEND, OldSrcBlend);
pD3DDevice->SetRenderState(D3DRS_DESTBLEND, OldDestBlend);
}
// Make sure to release the device object!
pD3DDevice->Release();
// Return success
return S_OK;
}
D3DXMESHCONTAINER_EX **ppMesh,
IDirect3DDevice9 *pDevice,
char *Filename, char *TexturePath /* = */,
DWORD NewFVF /* = 0 */, DWORD LoadFlags /* = D3DXMESH_SYSTEMMEM */
)
{
ID3DXMesh *pLoadMesh = NULL;
HRESULT hr;
// Error checking
if(!ppMesh || !pDevice || !Filename || !TexturePath)
return E_FAIL;
// Use system memory if converting FVF
DWORD TempLoadFlags = LoadFlags;
if(NewFVF)
TempLoadFlags = D3DXMESH_SYSTEMMEM;
// Load the mesh using D3DX routines
ID3DXBuffer *MaterialBuffer = NULL, *AdjacencyBuffer = NULL;
DWORD NumMaterials;
if(FAILED(hr=D3DXLoadMeshFromXA(Filename, TempLoadFlags,
pDevice, &AdjacencyBuffer,
&MaterialBuffer, NULL,
&NumMaterials, &pLoadMesh)))
return hr;
// Convert to new FVF first as needed
if(NewFVF) {
ID3DXMesh *pTempMesh;
// Use CloneMeshFVF to convert mesh
if(FAILED(hr=pLoadMesh->CloneMeshFVF(LoadFlags, NewFVF, pDevice, &pTempMesh))) {
ReleaseCOM(AdjacencyBuffer);
ReleaseCOM(MaterialBuffer);
ReleaseCOM(pLoadMesh);
return hr;
}
// Free prior mesh and store new pointer
ReleaseCOM(pLoadMesh);
pLoadMesh = pTempMesh; pTempMesh = NULL;
}
// Allocate a D3DXMESHCONTAINER_EX structure
D3DXMESHCONTAINER_EX *pMesh = new D3DXMESHCONTAINER_EX();
*ppMesh = pMesh;
// Store mesh name (filename), type, and mesh pointer
pMesh->Name = _strdup(Filename);
pMesh->MeshData.Type = D3DXMESHTYPE_MESH;
pMesh->MeshData.pMesh = pLoadMesh; pLoadMesh = NULL;
// Store adjacency buffer
DWORD AdjSize = AdjacencyBuffer->GetBufferSize();
if(AdjSize) {
pMesh->pAdjacency = new DWORD[AdjSize];
memcpy(pMesh->pAdjacency, AdjacencyBuffer->GetBufferPointer(), AdjSize);
}
ReleaseCOM(AdjacencyBuffer);
// Build material list
if(!(pMesh->NumMaterials = NumMaterials)) {
// Create a default material
pMesh->NumMaterials = 1;
pMesh->pMaterials = new D3DXMATERIAL[1];
pMesh->pTextures = new IDirect3DTexture9*[1];
ZeroMemory(pMesh->pMaterials, sizeof(D3DXMATERIAL));
pMesh->pMaterials[0].MatD3D.Diffuse.r = 1.0f;
pMesh->pMaterials[0].MatD3D.Diffuse.g = 1.0f;
pMesh->pMaterials[0].MatD3D.Diffuse.b = 1.0f;
pMesh->pMaterials[0].MatD3D.Diffuse.a = 1.0f;
pMesh->pMaterials[0].MatD3D.Ambient = pMesh->pMaterials[0].MatD3D.Diffuse;
pMesh->pMaterials[0].MatD3D.Specular = pMesh->pMaterials[0].MatD3D.Diffuse;
pMesh->pMaterials[0].pTextureFilename = NULL;
pMesh->pTextures[0] = NULL;
} else {
// Load the materialsx
D3DXMATERIAL *Materials = (D3DXMATERIAL*)MaterialBuffer->GetBufferPointer();
pMesh->pMaterials = new D3DXMATERIAL[pMesh->NumMaterials];
pMesh->pTextures = new IDirect3DTexture9*[pMesh->NumMaterials];
for(DWORD i=0;i<pMesh->NumMaterials;i++) {
pMesh->pMaterials[i].MatD3D = Materials[i].MatD3D;
pMesh->pMaterials[i].MatD3D.Ambient = pMesh->pMaterials[i].MatD3D.Diffuse;
// Load the texture if one exists
pMesh->pTextures[i] = NULL;
if(Materials[i].pTextureFilename) {
char TextureFile[MAX_PATH];
sprintf_s(TextureFile,MAX_PATH, "%s%s", TexturePath,
Materials[i].pTextureFilename);
D3DXCreateTextureFromFileA(pDevice,
TextureFile,
&pMesh->pTextures[i]);
}
}
}
ReleaseCOM(MaterialBuffer);
// Optimize the mesh for better attribute access
pMesh->MeshData.pMesh->OptimizeInplace(D3DXMESHOPT_ATTRSORT, NULL, NULL, NULL, NULL);
// Clear pMesh pointer just in case
pMesh = NULL;
return S_OK;
}
// Draw the first mesh in a linked list of objects
HRESULT DrawMesh(D3DXMESHCONTAINER_EX *pMesh)
{
IDirect3DDevice9 *pD3DDevice;
DWORD LastState, OldAlphaState, OldSrcBlend, OldDestBlend;
// Error checking
if(!pMesh)
return E_FAIL;
if(!pMesh->MeshData.pMesh)
return E_FAIL;
if(!pMesh->NumMaterials || !pMesh->pMaterials)
return E_FAIL;
// Get the device interface
pMesh->MeshData.pMesh->GetDevice(&pD3DDevice);
// Release vertex shader if being used
pD3DDevice->SetVertexShader(NULL);
pD3DDevice->SetVertexDeclaration(NULL);
// Save render states
pD3DDevice->GetRenderState(D3DRS_ALPHABLENDENABLE, &OldAlphaState);
pD3DDevice->GetRenderState(D3DRS_SRCBLEND, &OldSrcBlend);
pD3DDevice->GetRenderState(D3DRS_DESTBLEND, &OldDestBlend);
LastState = OldAlphaState;
// Setup pointer for mesh to draw, either regular or skinned
ID3DXMesh *pDrawMesh = (!pMesh->pSkinMesh)?pMesh->MeshData.pMesh:pMesh->pSkinMesh;
// Look through all subsets
for(DWORD i=0;i<pMesh->NumMaterials;i++) {
// Set material and texture
pD3DDevice->SetMaterial(&pMesh->pMaterials[i].MatD3D);
pD3DDevice->SetTexture(0, pMesh->pTextures[i]);
// Enable or disable alpha blending per material
if(pMesh->pMaterials[i].MatD3D.Diffuse.a != 1.0f) {
if(LastState != TRUE) {
LastState = TRUE;
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE);//SRCCOLOR);
pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_DESTCOLOR);
}
} else {
if(LastState != FALSE) {
LastState = FALSE;
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
}
}
// Draw the mesh subset
pDrawMesh->DrawSubset(i);
}
// Restore alpha blending states
if(LastState != OldAlphaState) {
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, OldAlphaState);
pD3DDevice->SetRenderState(D3DRS_SRCBLEND, OldSrcBlend);
pD3DDevice->SetRenderState(D3DRS_DESTBLEND, OldDestBlend);
}
// Make sure to release the device object!
pD3DDevice->Release();
// Return success
return S_OK;
}
]]>
开始了Advanced Animation with DirectX的阅?br>基础cd的构建是重要?q后打算把它们加入我的zybToos的Framework里?br>代码来自书中
#ifndef ZYBANIMATIONTOOLS_H
#define ZYBANIMATIONTOOLS_H
#include "DXUT.h"
//=========================================
/**
扩充D3DXMESHCONTAINER
扩充D3DXFrame
*/
//=========================================
namespace zyb
{
#define ReleaseCOM(x) { if(x!=NULL) x->Release(); x=NULL; }
// Declare an extended version of D3DXFRAME
// that contains a constructor and destructor
// as well as a combined transformation matrix
struct D3DXFRAME_EX : D3DXFRAME
{
D3DXMATRIX matCombined; // Combined matrix
D3DXMATRIX matOriginal; // Original transformation from .X
D3DXFRAME_EX()
{
Name = NULL;
pMeshContainer = NULL;
pFrameSibling = pFrameFirstChild = NULL;
D3DXMatrixIdentity(&matCombined);
D3DXMatrixIdentity(&matOriginal);
D3DXMatrixIdentity(&TransformationMatrix);
}
~D3DXFRAME_EX()
{
delete [] Name; Name = NULL;
delete pFrameSibling; pFrameSibling = NULL;
delete pFrameFirstChild; pFrameFirstChild = NULL;
}
// Function to scan hierarchy for matching frame name
D3DXFRAME_EX *Find(const char *FrameName)
{
D3DXFRAME_EX *pFrame, *pFramePtr;
// Return this frame instance if name matched
if(Name && FrameName && !strcmp(FrameName, Name))
return this;
// Scan siblings
if((pFramePtr = (D3DXFRAME_EX*)pFrameSibling)) {
if((pFrame = pFramePtr->Find(FrameName)))
return pFrame;
}
// Scan children
if((pFramePtr = (D3DXFRAME_EX*)pFrameFirstChild)) {
if((pFrame = pFramePtr->Find(FrameName)))
return pFrame;
}
// Return none found
return NULL;
}
// Reset transformation matrices to originals
void Reset()
{
// Copy original matrix
TransformationMatrix = matOriginal;
// Reset sibling frames
D3DXFRAME_EX *pFramePtr;
if((pFramePtr = (D3DXFRAME_EX*)pFrameSibling))
pFramePtr->Reset();
// Reset child frames
if((pFramePtr = (D3DXFRAME_EX*)pFrameFirstChild))
pFramePtr->Reset();
}
// Function to combine matrices in frame hiearchy
void UpdateHierarchy(D3DXMATRIX *matTransformation = NULL)
{
D3DXFRAME_EX *pFramePtr;
D3DXMATRIX matIdentity;
// Use an identity matrix if none passed
if(!matTransformation) {
D3DXMatrixIdentity(&matIdentity);
matTransformation = &matIdentity;
}
// Combine matrices w/supplied transformation matrix
matCombined = TransformationMatrix * (*matTransformation);
// Combine w/sibling frames
if((pFramePtr = (D3DXFRAME_EX*)pFrameSibling))
pFramePtr->UpdateHierarchy(matTransformation);
// Combine w/child frames
if((pFramePtr = (D3DXFRAME_EX*)pFrameFirstChild))
pFramePtr->UpdateHierarchy(&matCombined);
}
void Count(DWORD *Num)
{
// Error checking
if(!Num)
return;
// Increase count of frames
(*Num)+=1;
// Process sibling frames
D3DXFRAME_EX *pFrame;
if((pFrame=(D3DXFRAME_EX*)pFrameSibling))
pFrame->Count(Num);
// Process child frames
if((pFrame=(D3DXFRAME_EX*)pFrameFirstChild))
pFrame->Count(Num);
}
};
// Declare an extended version of D3DXMESHCONTAINER
// that contains a constructor and destructor
// as well as an array of textures, a mesh object
// that contains the generated skin mesh, and
// matrices that map to the frame hierarchy's and
// for updating bones.
struct D3DXMESHCONTAINER_EX : D3DXMESHCONTAINER
{
IDirect3DTexture9 **pTextures;
ID3DXMesh *pSkinMesh;
D3DXMATRIX **ppFrameMatrices;
D3DXMATRIX *pBoneMatrices;
D3DXMESHCONTAINER_EX()
{
Name = NULL;
MeshData.pMesh = NULL;
pMaterials = NULL;
pEffects = NULL;
NumMaterials = 0;
pAdjacency = NULL;
pSkinInfo = NULL;
pNextMeshContainer = NULL;
pTextures = NULL;
pSkinMesh = NULL;
ppFrameMatrices = NULL;
pBoneMatrices = NULL;
}
~D3DXMESHCONTAINER_EX()
{
if(pTextures && NumMaterials) {
for(DWORD i=0;i<NumMaterials;i++)
ReleaseCOM(pTextures[i]);
}
delete [] pTextures; pTextures = NULL;
NumMaterials = 0;
delete [] Name; Name = NULL;
delete [] pMaterials; pMaterials = NULL;
delete pEffects; pEffects = NULL;
delete [] pAdjacency; pAdjacency = NULL;
delete [] ppFrameMatrices; ppFrameMatrices = NULL;
delete [] pBoneMatrices; pBoneMatrices = NULL;
ReleaseCOM(MeshData.pMesh);
ReleaseCOM(pSkinInfo);
ReleaseCOM(pSkinMesh);
delete pNextMeshContainer; pNextMeshContainer = NULL;
}
D3DXMESHCONTAINER_EX *Find(char *MeshName)
{
D3DXMESHCONTAINER_EX *pMesh, *pMeshPtr;
// Return this mesh instance if name matched
if(Name && MeshName && !strcmp(MeshName, Name))
return this;
// Scan next in list
if((pMeshPtr = (D3DXMESHCONTAINER_EX*)pNextMeshContainer)) {
if((pMesh = pMeshPtr->Find(MeshName)))
return pMesh;
}
// Return none found
return NULL;
}
};
}
#endif
#define ZYBANIMATIONTOOLS_H
#include "DXUT.h"
//=========================================
/**
扩充D3DXMESHCONTAINER
扩充D3DXFrame
*/
//=========================================
namespace zyb
{
#define ReleaseCOM(x) { if(x!=NULL) x->Release(); x=NULL; }
// Declare an extended version of D3DXFRAME
// that contains a constructor and destructor
// as well as a combined transformation matrix
struct D3DXFRAME_EX : D3DXFRAME
{
D3DXMATRIX matCombined; // Combined matrix
D3DXMATRIX matOriginal; // Original transformation from .X
D3DXFRAME_EX()
{
Name = NULL;
pMeshContainer = NULL;
pFrameSibling = pFrameFirstChild = NULL;
D3DXMatrixIdentity(&matCombined);
D3DXMatrixIdentity(&matOriginal);
D3DXMatrixIdentity(&TransformationMatrix);
}
~D3DXFRAME_EX()
{
delete [] Name; Name = NULL;
delete pFrameSibling; pFrameSibling = NULL;
delete pFrameFirstChild; pFrameFirstChild = NULL;
}
// Function to scan hierarchy for matching frame name
D3DXFRAME_EX *Find(const char *FrameName)
{
D3DXFRAME_EX *pFrame, *pFramePtr;
// Return this frame instance if name matched
if(Name && FrameName && !strcmp(FrameName, Name))
return this;
// Scan siblings
if((pFramePtr = (D3DXFRAME_EX*)pFrameSibling)) {
if((pFrame = pFramePtr->Find(FrameName)))
return pFrame;
}
// Scan children
if((pFramePtr = (D3DXFRAME_EX*)pFrameFirstChild)) {
if((pFrame = pFramePtr->Find(FrameName)))
return pFrame;
}
// Return none found
return NULL;
}
// Reset transformation matrices to originals
void Reset()
{
// Copy original matrix
TransformationMatrix = matOriginal;
// Reset sibling frames
D3DXFRAME_EX *pFramePtr;
if((pFramePtr = (D3DXFRAME_EX*)pFrameSibling))
pFramePtr->Reset();
// Reset child frames
if((pFramePtr = (D3DXFRAME_EX*)pFrameFirstChild))
pFramePtr->Reset();
}
// Function to combine matrices in frame hiearchy
void UpdateHierarchy(D3DXMATRIX *matTransformation = NULL)
{
D3DXFRAME_EX *pFramePtr;
D3DXMATRIX matIdentity;
// Use an identity matrix if none passed
if(!matTransformation) {
D3DXMatrixIdentity(&matIdentity);
matTransformation = &matIdentity;
}
// Combine matrices w/supplied transformation matrix
matCombined = TransformationMatrix * (*matTransformation);
// Combine w/sibling frames
if((pFramePtr = (D3DXFRAME_EX*)pFrameSibling))
pFramePtr->UpdateHierarchy(matTransformation);
// Combine w/child frames
if((pFramePtr = (D3DXFRAME_EX*)pFrameFirstChild))
pFramePtr->UpdateHierarchy(&matCombined);
}
void Count(DWORD *Num)
{
// Error checking
if(!Num)
return;
// Increase count of frames
(*Num)+=1;
// Process sibling frames
D3DXFRAME_EX *pFrame;
if((pFrame=(D3DXFRAME_EX*)pFrameSibling))
pFrame->Count(Num);
// Process child frames
if((pFrame=(D3DXFRAME_EX*)pFrameFirstChild))
pFrame->Count(Num);
}
};
// Declare an extended version of D3DXMESHCONTAINER
// that contains a constructor and destructor
// as well as an array of textures, a mesh object
// that contains the generated skin mesh, and
// matrices that map to the frame hierarchy's and
// for updating bones.
struct D3DXMESHCONTAINER_EX : D3DXMESHCONTAINER
{
IDirect3DTexture9 **pTextures;
ID3DXMesh *pSkinMesh;
D3DXMATRIX **ppFrameMatrices;
D3DXMATRIX *pBoneMatrices;
D3DXMESHCONTAINER_EX()
{
Name = NULL;
MeshData.pMesh = NULL;
pMaterials = NULL;
pEffects = NULL;
NumMaterials = 0;
pAdjacency = NULL;
pSkinInfo = NULL;
pNextMeshContainer = NULL;
pTextures = NULL;
pSkinMesh = NULL;
ppFrameMatrices = NULL;
pBoneMatrices = NULL;
}
~D3DXMESHCONTAINER_EX()
{
if(pTextures && NumMaterials) {
for(DWORD i=0;i<NumMaterials;i++)
ReleaseCOM(pTextures[i]);
}
delete [] pTextures; pTextures = NULL;
NumMaterials = 0;
delete [] Name; Name = NULL;
delete [] pMaterials; pMaterials = NULL;
delete pEffects; pEffects = NULL;
delete [] pAdjacency; pAdjacency = NULL;
delete [] ppFrameMatrices; ppFrameMatrices = NULL;
delete [] pBoneMatrices; pBoneMatrices = NULL;
ReleaseCOM(MeshData.pMesh);
ReleaseCOM(pSkinInfo);
ReleaseCOM(pSkinMesh);
delete pNextMeshContainer; pNextMeshContainer = NULL;
}
D3DXMESHCONTAINER_EX *Find(char *MeshName)
{
D3DXMESHCONTAINER_EX *pMesh, *pMeshPtr;
// Return this mesh instance if name matched
if(Name && MeshName && !strcmp(MeshName, Name))
return this;
// Scan next in list
if((pMeshPtr = (D3DXMESHCONTAINER_EX*)pNextMeshContainer)) {
if((pMesh = pMeshPtr->Find(MeshName)))
return pMesh;
}
// Return none found
return NULL;
}
};
}
#endif
]]>
]]>
streams定义了两个可用于布尔表达式的函数
operator void*() 意义Qstream是否出错Q相当于!fail()Q?br>operator !() 意义Qstream是否已出错（相当于fail()Q?/p>
我们可以q用operator void*()在控制结构中z测出stream的当前状?
while (std::cin)
{
}
控制l构中的布尔条g值ƈ不是非得直接转换为bool不可Q只要能够{换ؓ(f)某个整数型别或指针型别就够了?br>转换为void* 常常是ؓ(f)了在同一表达式中d对象q测试是否成功：(x)
if(std::cin>> x)
{
//reading x was successful
}
正如先前的讨论，表达?br>std::cin >> x
?x)返回cinQ所以读入x后，上述语句变ؓ(f)
if(std::cin)
{
}
此时的cin被用于条件判?所以cin?x)调?operator void*,q回"stream是否发生错误"
以上技术的几个典型应用是以@环读入对象ƈ处理
while(std::cin >> obj)
{
std:: cout << obj << std::endl;
}
如果failbit或badbit被设立，该@环就立即中止---出现错误或者读?end-of-file).
我们可以利用operator!q行相反试Q它?x)返?strean是否已发生错?Q也是说如果failbit 或badbit被设立就?x)返回true用法如下:
if(!std::cin)
{
//the stream is not OK
}
上述文字Z <<c++标准E序?自修教程与参考手?>>p600 侯捷-孟岩?/p>
׃几天旉l于这本书阅读完了Q里面的streambuf没有理解Q是我功底不够的~故?..
开学了Qh多了hQl静静的学习(fn)
]]>