kraken_engine/kraken
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implemented logic to track the source of the mesh data and perform appropriate cleanup depending on if it was malloc'ed or mmap'ed.

Browse Source 
Implemented writePack method

--HG--
extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%4017
This commit is contained in:
kearwood
2012-03-16 00:53:15 +00:00
parent d43989cd88
commit d305bd1438
3 changed files with 122 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

113
KREngine/KREngine/Classes/KRMesh.cpp
View File

@@ -63,6 +63,11 @@ KRMesh::~KRMesh() {
}
}
clearBuffers();
}
void KRMesh::clearBuffers() {
m_submeshes.clear();
if(m_pBuffers != NULL) {
glDeleteBuffers(m_cBuffers, m_pBuffers);
delete m_pBuffers;
@@ -79,6 +84,7 @@ void KRMesh::loadPack(std::string path) {
} else {
m_iPackFileSize = statbuf.st_size;
clearBuffers();
pack_header *pHeader = (pack_header *)m_pPackData;
@@ -88,37 +94,54 @@ void KRMesh::loadPack(std::string path) {
m_maxx = pHeader->maxx;
m_maxy = pHeader->maxy;
m_maxz = pHeader->maxz;
pack_material *pPackMaterials = (pack_material *)(pHeader+1);
for(int iMaterial=0; iMaterial < pHeader->submesh_count; iMaterial++) {
pack_material *pPackMaterial = pPackMaterials + iMaterial;
Submesh *pSubmesh = new Submesh();
pSubmesh->start_vertex = pPackMaterial->start_vertex;
pSubmesh->vertex_count = pPackMaterial->vertex_count;
strcpy(pSubmesh->szMaterialName, pPackMaterial->szName);
m_submeshes.push_back(pSubmesh);
}
m_pVertexData = (VertexData *)(pPackMaterials + pHeader->submesh_count);
m_cBuffers = (pHeader->vertex_count + MAX_VBO_SIZE - 1) / MAX_VBO_SIZE;
m_pBuffers = new GLuint[m_cBuffers];
glGenBuffers(m_cBuffers, m_pBuffers);
for(GLsizei iBuffer=0; iBuffer < m_cBuffers; iBuffer++) {
GLsizei cVertexes = iBuffer < m_cBuffers - 1 ? MAX_VBO_SIZE : pHeader->vertex_count % MAX_VBO_SIZE;
glBindBuffer(GL_ARRAY_BUFFER, m_pBuffers[iBuffer]);
glBufferData(GL_ARRAY_BUFFER, sizeof(VertexData) * cVertexes, m_pVertexData + iBuffer * MAX_VBO_SIZE, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
}
}
}
}
bool KRMesh::writePack(std::string path) {
clearBuffers();
int fdNewFile = open(path.c_str(), O_RDWR);
if(fdNewFile == 0) {
return false;
} else {
void *pNewData = mmap(0, m_iPackFileSize, PROT_READ | PROT_WRITE, MAP_SHARED, fdNewFile, 0);
if(pNewData == (caddr_t) -1) {
close(fdNewFile);
return false;
} else {
memcpy(pNewData, m_pPackData, m_iPackFileSize);
mprotect(pNewData, m_iPackFileSize, PROT_READ);
if(m_fdPackFile) {
if(m_pPackData != NULL) {
void *malloc_data = malloc(m_iPackFileSize);
memcpy(malloc_data, m_pPackData, m_iPackFileSize);
munmap(m_pPackData, m_iPackFileSize);
}
close(m_fdPackFile);
}
m_fdPackFile = fdNewFile;
m_pPackData = pNewData;
return true;
}
}
}
void KRMesh::unmap() {
clearBuffers();
if(m_fdPackFile) {
if(m_pPackData != NULL) {
void *malloc_data = malloc(m_iPackFileSize);
memcpy(malloc_data, m_pPackData, m_iPackFileSize);
munmap(m_pPackData, m_iPackFileSize);
m_pPackData = malloc_data;
}
close(m_fdPackFile);
}
}
GLfloat KRMesh::getMaxDimension() {
GLfloat m = 0.0;
if(m_maxx - m_minx > m) m = m_maxx - m_minx;
@@ -147,12 +170,42 @@ GLfloat KRMesh::getMaxZ() {
}
vector<KRMesh::Submesh *> KRMesh::getSubmeshes() {
if(m_submeshes.size() == 0) {
pack_header *pHeader = (pack_header *)m_pPackData;
pack_material *pPackMaterials = (pack_material *)(pHeader+1);
m_submeshes.clear();
for(int iMaterial=0; iMaterial < pHeader->submesh_count; iMaterial++) {
pack_material *pPackMaterial = pPackMaterials + iMaterial;
Submesh *pSubmesh = new Submesh();
pSubmesh->start_vertex = pPackMaterial->start_vertex;
pSubmesh->vertex_count = pPackMaterial->vertex_count;
strcpy(pSubmesh->szMaterialName, pPackMaterial->szName);
m_submeshes.push_back(pSubmesh);
}
}
return m_submeshes;
}
void KRMesh::renderSubmesh(int iSubmesh, int *iPrevBuffer) {
Submesh *pSubmesh = m_submeshes[iSubmesh];
VertexData *pVertexData = getVertexData();
if(m_cBuffers == 0) {
pack_header *pHeader = (pack_header *)m_pPackData;
m_cBuffers = (pHeader->vertex_count + MAX_VBO_SIZE - 1) / MAX_VBO_SIZE;
m_pBuffers = new GLuint[m_cBuffers];
glGenBuffers(m_cBuffers, m_pBuffers);
for(GLsizei iBuffer=0; iBuffer < m_cBuffers; iBuffer++) {
GLsizei cVertexes = iBuffer < m_cBuffers - 1 ? MAX_VBO_SIZE : pHeader->vertex_count % MAX_VBO_SIZE;
glBindBuffer(GL_ARRAY_BUFFER, m_pBuffers[iBuffer]);
glBufferData(GL_ARRAY_BUFFER, sizeof(VertexData) * cVertexes, pVertexData + iBuffer * MAX_VBO_SIZE, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
}
vector<KRMesh::Submesh *> submeshes = getSubmeshes();
Submesh *pSubmesh = submeshes[iSubmesh];
int iVertex = pSubmesh->start_vertex;
int iBuffer = iVertex / MAX_VBO_SIZE;
@@ -192,3 +245,9 @@ void KRMesh::renderSubmesh(int iSubmesh, int *iPrevBuffer) {
}
}
}
KRMesh::VertexData *KRMesh::getVertexData() {
pack_header *pHeader = (pack_header *)m_pPackData;
pack_material *pPackMaterials = (pack_material *)(pHeader+1);
return (VertexData *)(pPackMaterials + pHeader->submesh_count);
}

45
KREngine/KREngine/Classes/KRMesh.h
View File

@@ -48,6 +48,7 @@ public:
~KRMesh();
void loadPack(std::string path);
bool writePack(std::string path);
void renderSubmesh(int iSubmesh, int *iPrevBuffer);
GLfloat getMaxDimension();
@@ -64,6 +65,26 @@ public:
char szMaterialName[64];
} Submesh;
typedef struct {
GLfloat x;
GLfloat y;
GLfloat z;
} Vertex3D, KRVector3D;
typedef struct {
GLfloat u;
GLfloat v;
} TexCoord;
typedef struct {
Vertex3D vertex;
KRVector3D normal;
KRVector3D tangent;
TexCoord texcoord;
} VertexData;
VertexData *getVertexData();
vector<Submesh *> getSubmeshes();
protected:
@@ -85,33 +106,15 @@ protected:
int32_t vertex_count;
char szName[64];
} pack_material;
typedef struct {
GLfloat x;
GLfloat y;
GLfloat z;
} Vertex3D, KRVector3D;
typedef struct {
GLfloat u;
GLfloat v;
} TexCoord;
typedef struct {
Vertex3D vertex;
KRVector3D normal;
KRVector3D tangent;
TexCoord texcoord;
} VertexData;
VertexData *m_pVertexData;
GLsizei m_cBuffers;
GLuint *m_pBuffers;
vector<Submesh *> m_submeshes;
void unmap();
void clearBuffers();
};