//---------------------------------------------------------------------------
int WINAPI WinMain(HINSTANCE hI, HINSTANCE hPI, LPSTR cmdline, int iWinMode)
{
// for determining if there are 'object leaks'
unsigned int uiInitialCount = NiRefObject::GetTotalObjectCount();
#ifdef LOG_MEMORY_TRACKING
NiInit();
#else
NiInitOptions* pkInitOptions = NiExternalNew NiInitOptions(
NiExternalNew NiMemTracker(NiExternalNew NiStandardAllocator(), false));
NiInit(pkInitOptions);
#endif
// If cmdline.txt file exists in the work directory, read it and
// set it as the command line
NiFile* pkCmdlineFile = NULL;
if (!cmdline || strlen(cmdline) == 0)
{
pkCmdlineFile = NiNew NiFile("./cmdline.txt", NiFile::READ_ONLY);
}
if (pkCmdlineFile && *pkCmdlineFile)
{
// artificial 1024-character limit
char* pcCmdline = NiAlloc(char, 1024);
int iLength = 0;
char c;
// Read until limit is reached or end of file or end of string
while (iLength < 1023)
{
if (!(pkCmdlineFile->Read(&c, 1) || c == '\0'))
break;
// Factor out newlines and carriage returns
// Replace with ' ' in case newline seperates valid parameters
if (c == '\n' || c == '\r')
c = ' ';
pcCmdline[iLength++] = c;
}
pcCmdline[iLength] = '\0';
// let the application know about the command line
NiApplication::SetCommandLine(pcCmdline);
NiFree(pcCmdline);
}
//-------------------------------------------------------------------------------------------------
bool sdPhysicsSystem::CreateTerrain(sdTerrain* pkTerrain)
{
NIASSERT(pkTerrain);
NIASSERT(m_pkHeightField == NULL)
sdHeightMap* pkHeightMap = pkTerrain->GetHeightMap();
NIASSERT(pkHeightMap);
uint uiBlockSize = pkHeightMap->GetSize() + 1; ///< 每边顶点数(??为什么加一??)
uint uiNumVert = uiBlockSize * uiBlockSize; ///< 总顶点数
float fMinHeight = pkHeightMap->GetMinHeight();
float fMaxHeight = pkHeightMap->GetMaxHeight();
float fMidHeight = (fMaxHeight + fMinHeight) * 0.5f;
float fHalfDeltaHeight = (fMaxHeight - fMinHeight) * 0.5f;
float fThirtyTwoKb = 32766.f;
fHalfDeltaHeight = fabs(fHalfDeltaHeight) < 0.0001f ? 0.0001f : fHalfDeltaHeight; ///< 防止值过小
NxHeightFieldSample* pnxHeightFieldSample = NiAlloc2(NxHeightFieldSample, uiNumVert, NiMemHint::NONE);
NIASSERT(pnxHeightFieldSample);
// 创建高度域描述
NxHeightFieldDesc nxHeightFieldDesc;
nxHeightFieldDesc.nbColumns = uiBlockSize;
nxHeightFieldDesc.nbRows = uiBlockSize;
nxHeightFieldDesc.convexEdgeThreshold = 0.f;
nxHeightFieldDesc.thickness = -1000.f;
nxHeightFieldDesc.samples = pnxHeightFieldSample;
nxHeightFieldDesc.sampleStride = sizeof(NxU32);
uchar* pucData = (uchar*)pnxHeightFieldSample;
for (int i = 0; i < (int)uiBlockSize; ++i)
{
for (int j = 0; j < (int)uiBlockSize; ++j)
{
float fHeight = pkHeightMap->GetRawHeight(i, j);
NxI16 nxHeight = (NxI16)(fThirtyTwoKb * ((fHeight - fMinHeight) / fHalfDeltaHeight));
NxHeightFieldSample* pkHeightFieldSample = (NxHeightFieldSample*)(pucData);
pkHeightFieldSample->height = nxHeight;
pkHeightFieldSample->materialIndex0 = 1;
pkHeightFieldSample->materialIndex1 = 1;
pkHeightFieldSample->tessFlag = 1;
pucData += nxHeightFieldDesc.sampleStride;
}
}
// 创建高度域
m_pkHeightField = m_pkPhysicsSDK->createHeightField(nxHeightFieldDesc);
NIASSERT(m_pkHeightField);
//
NiFree(pnxHeightFieldSample);
pnxHeightFieldSample = NULL;
// 创建对象描述
NiPoint3 kWorldCenter(0, 0, fMidHeight); ///< ??为什么是这个值??
NxVec3 nxWorldCenter;
NiPhysXTypes::NiPoint3ToNxVec3(kWorldCenter, nxWorldCenter);
NiMatrix3 kWorldRotation(NiPoint3(0.f, 1.f, 0.f), NiPoint3(0.f, 0.f, 1.f), NiPoint3(1.f, 0.f, 0.f));
NxMat33 nxWorldRotation;
NiPhysXTypes::NiMatrix3ToNxMat33(kWorldRotation, nxWorldRotation);
NxMat34 kPose;
kPose.t = nxWorldCenter;
kPose.M = nxWorldRotation;
NxHeightFieldShapeDesc nxHeightFieldShapeDesc;
nxHeightFieldShapeDesc.heightField = m_pkHeightField;
nxHeightFieldShapeDesc.heightScale = fHalfDeltaHeight / fThirtyTwoKb;
nxHeightFieldShapeDesc.rowScale = 1.f;
nxHeightFieldShapeDesc.columnScale = 1.f;
nxHeightFieldShapeDesc.materialIndexHighBits = 0;
nxHeightFieldShapeDesc.holeMaterial = 100;
nxHeightFieldShapeDesc.meshFlags = NX_MESH_SMOOTH_SPHERE_COLLISIONS;
nxHeightFieldShapeDesc.shapeFlags |= NX_SF_FEATURE_INDICES;
// nxHeightFieldShapeDesc.shapeFlags |= NX_SF_VISUALIZATION;
nxHeightFieldShapeDesc.shapeFlags &= ~NX_SF_VISUALIZATION;
nxHeightFieldShapeDesc.group = E_COLLISION_GROUP_MASK_TERRAIN;
nxHeightFieldShapeDesc.name = "PhysX_Terrain";
NxActorDesc nxActorDesc;
nxActorDesc.body = NULL;
nxActorDesc.name = NULL;
nxActorDesc.shapes.push_back(&nxHeightFieldShapeDesc);
nxActorDesc.globalPose = kPose;
nxActorDesc.group = E_COLLISION_GROUP_MASK_TERRAIN;
// 创建对象
NxActor* pkActor = m_pkScene->createActor(nxActorDesc);
NIASSERT(pkActor);
return true;
}