void TerrainPageSurfaceLayer::populate(const TerrainPageGeometry& geometry)
{
const SegmentVector validSegments = geometry.getValidSegments();
for (SegmentVector::const_iterator I = validSegments.begin(); I != validSegments.end(); ++I) {
#if 0
//the current Mercator code works such that whenever an Area is added to Terrain, _all_ surfaces for the affected segments are invalidated, thus requiering a total repopulation of the segment
//If however that code was changed to only invalidate the affected surface the code below would be very much handy
Mercator::Surface* surface(getSurfaceForSegment(I->segment));
if (surface) {
surface->populate();
}
#else
Mercator::Segment* segment(I->segment);
if (!segment->isValid()) {
segment->populate();
}
Mercator::Segment::Surfacestore::iterator I2(segment->getSurfaces().find(mSurfaceIndex));
if (I2 == segment->getSurfaces().end()) {
//the segment doesn't contain this surface yet, lets add it
if (mShader.checkIntersect(*segment)) {
S_LOG_VERBOSE("Adding new surface with id " << mSurfaceIndex << " to segment at x: " << segment->getXRef() << " y: " << segment->getYRef());
Mercator::Segment::Surfacestore & sss = segment->getSurfaces();
sss[mSurfaceIndex] = mShader.newSurface(*segment);
}
}
//NOTE: we have to repopulate all surfaces mainly to get the foliage to work.
segment->populateSurfaces();
#endif
}
}
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()));
}
}
}
}
bool TerrainPageSurfaceLayer::intersects(const TerrainPageGeometry& geometry) const
{
const SegmentVector validSegments = geometry.getValidSegments();
//check if at least one surface intersects
for (SegmentVector::const_iterator I = validSegments.begin(); I != validSegments.end(); ++I) {
if (mShader.checkIntersect(*I->segment)) {
return true;
}
}
return false;
}
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) {
if (mShader.checkIntersect(*I->segment)) {
Mercator::Surface* surface = getSurfaceForSegment(I->segment);
if (surface && surface->isValid()) {
WFImage sourceImage(new Image::ImageBuffer(65, 1, surface->getData()));
//We need to adjust the position of the x index by one because there's a one pixel offset when converting between the Mercator Segments and the Ogre page.
image.blit(sourceImage, channel, ((int)I->index.x() * 64) + 1, ((mTerrainPageSurface.getNumberOfSegmentsPerAxis() - (int)I->index.y() - 1) * 64));
}
}
}
}