void TerrainPageSurfaceLayer::fillImage(const TerrainPageGeometry& geometry, Image& image, unsigned int channel) const
{
SegmentVector validSegments = geometry.getValidSegments();
for (SegmentVector::const_iterator I = validSegments.begin(); I != validSegments.end(); ++I) {
Mercator::Segment* segment = I->segment;
if (mShader.checkIntersect(*segment)) {
Mercator::Surface* surface = getSurfaceForSegment(segment);
if (surface && surface->isValid()) {
Image::ImageBuffer* textureBitmap = new Image::ImageBuffer(segment->getResolution(), 1);
auto srcPtr = surface->getData();
auto dataPtr = textureBitmap->getData();
auto segmentSize = segment->getSize();
for (int i = 0; i < segment->getResolution(); ++i) {
for (int j = 0; j < segment->getResolution(); ++j) {
//interpolate four samples to get the fragment coverage
*dataPtr = (unsigned char)((srcPtr[(i * segmentSize) + j] + srcPtr[(i * segmentSize) + j + 1] + srcPtr[((i + 1) * segmentSize) + j] + srcPtr[((i + 1) * segmentSize) + j + 1]) / 4);
dataPtr++;
}
}
WFImage sourceImage(textureBitmap);
image.blit(sourceImage, channel, ((int)I->index.x() * segment->getResolution()), ((mTerrainPageSurface.getNumberOfSegmentsPerAxis() - (int)I->index.y() - 1) * segment->getResolution()));
}
}
}
}
void SegmentManager::addSegment(Mercator::Segment& segment)
{
std::stringstream ss;
ss << (segment.getXRef() / segment.getResolution()) << "_" << (segment.getYRef() / segment.getResolution());
std::unique_lock<std::mutex> l(mSegmentsMutex);
SegmentStore::const_iterator I = mSegments.find(ss.str());
if (I == mSegments.end()) {
mSegments.insert(SegmentStore::value_type(ss.str(), new SegmentHolder(new Segment(segment), *this)));
}
}
void HeightMapUpdateTask::createHeightMapSegments() {
for (SegmentStore::const_iterator I = mSegments.begin(); I != mSegments.end(); ++I) {
Mercator::Segment* segment = *I;
if (segment) {
IHeightMapSegment* heightMapSegment = 0;
Mercator::Matrix<2, 2, Mercator::BasePoint>& basePoints(segment->getControlPoints());
//If all of the base points are on the same level, and there are no mods, we know that the segment is completely flat, and we can save some memory by using a HeightMapFlatSegment instance.
if (WFMath::Equal(basePoints[0].height(), basePoints[1].height()) && WFMath::Equal(basePoints[1].height(), basePoints[2].height()) && WFMath::Equal(basePoints[2].height(), basePoints[3].height()) && (segment->getMods().empty())) {
heightMapSegment = new HeightMapFlatSegment(basePoints[0].height());
} else {
HeightMapBuffer* buffer = mProvider.checkout();
if (buffer) {
memcpy(buffer->getBuffer()->getData(), segment->getPoints(), sizeof(float) * segment->getSize() * segment->getSize());
heightMapSegment = new HeightMapSegment(buffer);
}
}
if (heightMapSegment) {
mHeightMapSegments.emplace_back(WFMath::Point<2>(segment->getXRef() / segment->getResolution(), segment->getZRef() / segment->getResolution()), heightMapSegment);
}
}
}
}
