void DRGeometrieSphere::makeSphericalLandscape(GLuint numIterations, GLuint randomSeed)
{
if(!mVertexCount) LOG_ERROR_VOID("keine Vertices zum manipulieren!");
DRRandom::seed(randomSeed);
const int threadCount = g_CPU_Count;
PlaneData planes(numIterations, randomSeed);
LandscapeGenerateMultithreadData* workingData = new LandscapeGenerateMultithreadData[threadCount];
SDL_Thread** threads = new SDL_Thread*[threadCount];
for(int i = 0; i < threadCount; i++)
{
workingData[i].planes = &planes;
workingData[i].vertices = &mVertices[mVertexCount/threadCount*i];
workingData[i].vertexCount = mVertexCount/threadCount;
#if SDL_VERSION_ATLEAST(1,3,0)
threads[i] = SDL_CreateThread(makeLandscapeThread, "DRGeoLSC" ,&workingData[i]);
#else
threads[i] = SDL_CreateThread(makeLandscapeThread, &workingData[i]);
#endif
printf("thread: %d, vertexIndex: %ld, vertexCount: %ld, ges vertexCount: %ld\n",i, mVertexCount/threadCount*i, mVertexCount/threadCount, mVertexCount);
}
for(int i = 0; i < threadCount; i++)
{
int returnValue = 0;
SDL_WaitThread(threads[i], &returnValue);
if(returnValue)
{
LOG_WARNING("Fehler in Thread occured");
DRLog.writeToLog("Thread %d return with error: %d", i, returnValue);
}
}
DR_SAVE_DELETE_ARRAY(threads);
DR_SAVE_DELETE_ARRAY(workingData);
}
void HeightMapTexture::copyPixelData(u8* data, DRVector2i size)
{
if(!mPixelHeightData || mSize != size)
{
DR_SAVE_DELETE_ARRAY(mPixelHeightData);
mSize = size;
mMaxGradient = -10.0f;
mMaxHeight = -10.0f;
mPixelHeightData = new float[size.x*size.y];
}
if(sizeof(float) != sizeof(u8)*4) LOG_ERROR_VOID("datatypes not like expected");
//memcpy(mPixelHeightData, data, 4*size.x*size.y*sizeof(u8));
for(uint y = 0; y < size.y; y++)
{
for(uint x = 0; x < size.x; x++)
{
int i = x+y*size.x;
int ix = x-1+y*size.x;
int iy = x+(y-1)*size.x;
float red = static_cast<float>(data[i*4+2]);
float green = static_cast<float>(data[i*4+1]);
float blue = static_cast<float>(data[i*4]);
mPixelHeightData[i] = ((red+green*256.0f + (blue*256.0f*256.0f))/(256.0f*256.0f*256.0f))*2.0f-1.0f;
if(mPixelHeightData[i] > mMaxHeight)
mMaxHeight = mPixelHeightData[i];
if(x > 0)
{
float xGradient = fabs(mPixelHeightData[i] - mPixelHeightData[ix]);
if(xGradient > mMaxGradient)
mMaxGradient = xGradient;
}
if(y > 0)
{
float yGradient = fabs(mPixelHeightData[i] - mPixelHeightData[iy]);
if(yGradient > mMaxGradient)
mMaxGradient = yGradient;
}
}
}
//DREngineLog.writeToLog("[HeightMapTexture::copyPixelData]: maxHeight: %f, maxGradient: %f", mMaxHeight, mMaxGradient);
SDL_LockMutex(mPixelCopyMutex); LOG_WARNING_SDL();
mState++;
SDL_UnlockMutex(mPixelCopyMutex); LOG_WARNING_SDL();
}
DRReturn HeightMapLoader::saveImage()
{
if(mSavingState < 2) LOG_ERROR("Image data not ready!", DR_ERROR);
if(mSize.x <= 0 || mSize.y <= 0) LOG_ERROR("error getSize return zero", DR_ERROR);
if(mSavingBuffer)
{
mImage->setPixel(mSavingBuffer);
mParent->copyPixelData(mSavingBuffer, mSize);
DR_SAVE_DELETE_ARRAY(mSavingBuffer);
}
DRIImage::deleteImage(mImage);
mImage = NULL;
mSavingState = 3;
//printf("image saved\n");
return DR_OK;
}
HeightMapTexture::~HeightMapTexture()
{
DR_SAVE_DELETE_ARRAY(mPixelHeightData);
SDL_LockMutex(mPixelCopyMutex); SDL_UnlockMutex(mPixelCopyMutex);
SDL_DestroyMutex(mPixelCopyMutex); LOG_WARNING_SDL();
}
