void TopdownTileRenderer::renderChunk(const mc::Chunk& chunk, RGBAImage& tile, int dx, int dy) {
// TODO implement preblit water render behavior
int texture_size = images->getTextureSize();
for (int x = 0; x < 16; x++) {
for (int z = 0; z < 16; z++) {
std::deque<RenderBlock> blocks;
// TODO make this water thing a bit nicer
bool in_water = false;
int water = 0;
mc::LocalBlockPos localpos(x, z, 0);
//int height = chunk.getHeightAt(localpos);
//localpos.y = height;
localpos.y = -1;
if (localpos.y >= mc::CHUNK_HEIGHT*16 || localpos.y < 0)
localpos.y = mc::CHUNK_HEIGHT*16 - 1;
uint16_t id = chunk.getBlockID(localpos);
while (id == 0 && localpos.y > 0) {
localpos.y--;
id = chunk.getBlockID(localpos);
}
if (localpos.y < 0)
continue;
while (localpos.y >= 0) {
mc::BlockPos globalpos = localpos.toGlobalPos(chunk.getPos());
id = chunk.getBlockID(localpos);
if (id == 0) {
in_water = false;
localpos.y--;
continue;
}
uint16_t data = chunk.getBlockData(localpos);
bool is_water = (id == 8 || id == 9) && data == 0;
if (render_mode->isHidden(globalpos, id, data)) {
localpos.y--;
continue;
}
if (is_water && !use_preblit_water) {
if (is_water == in_water) {
localpos.y--;
continue;
}
in_water = is_water;
} else if (use_preblit_water) {
if (!is_water)
water = 0;
else {
water++;
if (water > images->getMaxWaterPreblit()) {
auto it = blocks.begin();
while (it != blocks.end()) {
auto current = it++;
if (it == blocks.end() || (it->id != 8 && it->id != 9)) {
RenderBlock& top = *current;
// blocks.erase(current);
top.id = 8;
top.data = OPAQUE_WATER;
top.block = images->getBlock(top.id, top.data);
render_mode->draw(top.block, top.pos, top.id, top.data);
// blocks.insert(current, top);
break;
} else {
blocks.erase(current);
}
}
break;
}
}
}
data = checkNeighbors(globalpos, id, data);
RGBAImage block = images->getBlock(id, data);
if (Biome::isBiomeBlock(id, data)) {
block = images->getBiomeBlock(id, data, getBiomeOfBlock(globalpos, &chunk));
}
render_mode->draw(block, globalpos, id, data);
RenderBlock render_block;
render_block.block = block;
render_block.id = id;
render_block.data = data;
render_block.pos = globalpos;
blocks.push_back(render_block);
if (!images->isBlockTransparent(id, data))
break;
localpos.y--;
}
while (blocks.size() > 0) {
RenderBlock render_block = blocks.back();
tile.alphaBlit(render_block.block, dx + x*texture_size, dy + z*texture_size);
blocks.pop_back();
}
}
}
}
void IsometricTileRenderer::renderTile(const TilePos& tile_pos, RGBAImage& tile) {
// some vars, set correct image size
int block_size = images->getBlockSize();
tile.setSize(getTileSize(), getTileSize());
// get the maximum count of water blocks
// blitted about each over, until they are nearly opaque
int max_water = images->getMaxWaterPreblit();
// all visible blocks which are rendered in this tile
std::set<RenderBlock> blocks;
// iterate over the highest blocks in the tile
// we use as tile position tile_pos+tile_offset because the offset means that
// we treat the tile position as tile_pos, but it's actually tile_pos+tile_offset
for (TileTopBlockIterator it(tile_pos, block_size, tile_width);
!it.end(); it.next()) {
// water render behavior n1:
// are we already in a row of water?
bool in_water = false;
// water render behavior n2:
// water counter, how many water blocks are at the moment in this row?
int water = 0;
// the render block objects in our current block row
std::set<RenderBlock> row_nodes;
// then iterate over the blocks, which are on the tile at the same position,
// beginning from the highest block
for (BlockRowIterator block(it.current); !block.end(); block.next()) {
// get current chunk position
mc::ChunkPos current_chunk_pos(block.current);
// check if current chunk is not null
// and if the chunk wasn't replaced in the cache (i.e. position changed)
if (current_chunk == nullptr || current_chunk->getPos() != current_chunk_pos)
// get chunk if not
//if (!state.world->hasChunkSection(current_chunk, block.current.y))
// continue;
current_chunk = world->getChunk(current_chunk_pos);
if (current_chunk == nullptr) {
// here is nothing (= air),
// so reset state if we are in water
in_water = false;
continue;
}
// get local block position
mc::LocalBlockPos local(block.current);
// now get block id
uint16_t id = current_chunk->getBlockID(local);
// air is completely transparent so continue
if (id == 0) {
in_water = false;
continue;
}
// now get the block data
uint16_t data = current_chunk->getBlockData(local);
// check if the render mode hides this block
if (render_mode->isHidden(block.current, id, data))
continue;
bool is_water = (id == 8 || id == 9) && data == 0;
if (is_water && !use_preblit_water) {
// water render behavior n1:
// render only the top sides of the water blocks
// and darken the ground with the lighting data
// used for lighting rendermode
// if we are already in water, skip checking this water block
if (is_water && in_water)
continue;
in_water = is_water;
} else if (use_preblit_water) {
// water render behavior n2:
// render the top side of every water block
// have also preblit water blocks to skip redundant alphablitting
// no lighting is needed because the 'opaque-water-effect'
// is created by blitting the top sides of the water blocks
// one above the other
if (!is_water) {
// if not water, reset the counter
water = 0;
} else {
water++;
// when we have enough water in a row
// we can stop searching more blocks
// and replace the already added render blocks with a preblit water block
if (water > max_water) {
std::set<RenderBlock>::const_iterator it = row_nodes.begin();
// iterate through the render blocks in this row
while (it != row_nodes.end()) {
std::set<RenderBlock>::const_iterator current = it++;
// check if we have reached the top most water block
if (it == row_nodes.end() || (it->id != 8 && it->id != 9)) {
RenderBlock top = *current;
row_nodes.erase(current);
// check for neighbors
mc::Block south, west;
south = getBlock(top.pos + mc::DIR_SOUTH);
west = getBlock(top.pos + mc::DIR_WEST);
id = 8;
data = OPAQUE_WATER;
bool neighbor_south = !south.isFullWater();
if (neighbor_south)
// data |= DATA_SOUTH;
data |= OPAQUE_WATER_SOUTH;
bool neighbor_west = !west.isFullWater();
if (neighbor_west)
// data |= DATA_WEST;
data |= OPAQUE_WATER_WEST;
// get image and replace the old render block with this
//top.image = images->getOpaqueWater(neighbor_south,
// neighbor_west);
top.image = images->getBlock(id, data);
// don't forget the render mode
render_mode->draw(top.image, top.pos, id, data);
row_nodes.insert(top);
break;
} else {
// water render block
row_nodes.erase(current);
}
}
break;
}
}
}
// check for special data (neighbor related)
// get block image, check for transparency, create render block...
data = checkNeighbors(block.current, id, data);
//if (is_water && (data & DATA_WEST) && (data & DATA_SOUTH))
// continue;
RGBAImage image;
bool transparent = images->isBlockTransparent(id, data);
// check for biome data
if (Biome::isBiomeBlock(id, data))
image = images->getBiomeBlock(id, data, getBiomeOfBlock(block.current, current_chunk));
else
image = images->getBlock(id, data);
RenderBlock node;
node.x = it.draw_x;
node.y = it.draw_y;
node.pos = block.current;
node.image = image;
node.id = id;
node.data = data;
// let the render mode do their magic with the block image
render_mode->draw(node.image, node.pos, id, data);
// insert into current row
row_nodes.insert(node);
// if this block is not transparent, then break
if (!transparent)
break;
}
// iterate through the created render blocks
for (std::set<RenderBlock>::const_iterator it = row_nodes.begin();
it != row_nodes.end(); ++it) {
std::set<RenderBlock>::const_iterator next = it;
next++;
// insert render block to
if (next == row_nodes.end()) {
blocks.insert(*it);
} else {
// skip unnecessary leaves
if (it->id == 18 && next->id == 18 && (next->data & 3) == (it->data & 3))
continue;
blocks.insert(*it);
}
}
}
// now blit all blocks
for (std::set<RenderBlock>::const_iterator it = blocks.begin(); it != blocks.end();
++it) {
tile.alphaBlit(it->image, it->x, it->y);
}
}