MeshMakeData: Explain members, and add grid size and minimap flag

src/client/content_mapblock.cpp

@@ -62,7 +62,7 @@ const std::string MapblockMeshGenerator::raillike_groupname = "connect_to_railli
 MapblockMeshGenerator::MapblockMeshGenerator(MeshMakeData *input, MeshCollector *output):
 	data(input),
 	collector(output),
-	nodedef(data->nodedef),
+	nodedef(data->m_nodedef),
 	blockpos_nodes(data->m_blockpos * MAP_BLOCKSIZE)
 {
 }
@@ -1773,9 +1773,9 @@ void MapblockMeshGenerator::generate()
 {
 	ZoneScoped;
 
-	for (cur_node.p.Z = 0; cur_node.p.Z < data->side_length; cur_node.p.Z++)
-	for (cur_node.p.Y = 0; cur_node.p.Y < data->side_length; cur_node.p.Y++)
-	for (cur_node.p.X = 0; cur_node.p.X < data->side_length; cur_node.p.X++) {
+	for (cur_node.p.Z = 0; cur_node.p.Z < data->m_side_length; cur_node.p.Z++)
+	for (cur_node.p.Y = 0; cur_node.p.Y < data->m_side_length; cur_node.p.Y++)
+	for (cur_node.p.X = 0; cur_node.p.X < data->m_side_length; cur_node.p.X++) {
 		cur_node.n = data->m_vmanip.getNodeNoEx(blockpos_nodes + cur_node.p);
 		cur_node.f = &nodedef->get(cur_node.n);
 		drawNode();

src/client/mapblock_mesh.cpp

@@ -26,9 +26,11 @@
 	MeshMakeData
 */
 
-MeshMakeData::MeshMakeData(const NodeDefManager *ndef, u16 side_length):
-	side_length(side_length),
-	nodedef(ndef)
+MeshMakeData::MeshMakeData(const NodeDefManager *ndef,
+		u16 side_length, MeshGrid mesh_grid) :
+	m_side_length(side_length),
+	m_mesh_grid(mesh_grid),
+	m_nodedef(ndef)
 {}
 
 void MeshMakeData::fillBlockDataBegin(const v3s16 &blockpos)
@@ -38,8 +40,9 @@ void MeshMakeData::fillBlockDataBegin(const v3s16 &blockpos)
 	v3s16 blockpos_nodes = m_blockpos*MAP_BLOCKSIZE;
 
 	m_vmanip.clear();
+	// extra 1 block thick layer around the mesh
 	VoxelArea voxel_area(blockpos_nodes - v3s16(1,1,1) * MAP_BLOCKSIZE,
-			blockpos_nodes + v3s16(1,1,1) * (side_length + MAP_BLOCKSIZE /* extra layer of blocks around the mesh */) - v3s16(1,1,1));
+			blockpos_nodes + v3s16(1,1,1) * (m_side_length + MAP_BLOCKSIZE) - v3s16(1,1,1));
 	m_vmanip.addArea(voxel_area);
 }
 
@@ -128,7 +131,7 @@ u16 getFaceLight(MapNode n, MapNode n2, const NodeDefManager *ndef)
 static u16 getSmoothLightCombined(const v3s16 &p,
 	const std::array<v3s16,8> &dirs, MeshMakeData *data)
 {
-	const NodeDefManager *ndef = data->nodedef;
+	const NodeDefManager *ndef = data->m_nodedef;
 
 	u16 ambient_occlusion = 0;
 	u16 light_count = 0;
@@ -316,7 +319,7 @@ void final_color_blend(video::SColor *result,
 */
 void getNodeTileN(MapNode mn, const v3s16 &p, u8 tileindex, MeshMakeData *data, TileSpec &tile)
 {
-	const NodeDefManager *ndef = data->nodedef;
+	const NodeDefManager *ndef = data->m_nodedef;
 	const ContentFeatures &f = ndef->get(mn);
 	tile = f.tiles[tileindex];
 	bool has_crack = p == data->m_crack_pos_relative;
@@ -336,7 +339,7 @@ void getNodeTileN(MapNode mn, const v3s16 &p, u8 tileindex, MeshMakeData *data,
 */
 void getNodeTile(MapNode mn, const v3s16 &p, const v3s16 &dir, MeshMakeData *data, TileSpec &tile)
 {
-	const NodeDefManager *ndef = data->nodedef;
+	const NodeDefManager *ndef = data->m_nodedef;
 
 	// Direction must be (1,0,0), (-1,0,0), (0,1,0), (0,-1,0),
 	// (0,0,1), (0,0,-1) or (0,0,0)
@@ -588,7 +591,7 @@ void PartialMeshBuffer::draw(video::IVideoDriver *driver) const
 MapBlockMesh::MapBlockMesh(Client *client, MeshMakeData *data, v3s16 camera_offset):
 	m_tsrc(client->getTextureSource()),
 	m_shdrsrc(client->getShaderSource()),
-	m_bounding_sphere_center((data->side_length * 0.5f - 0.5f) * BS),
+	m_bounding_sphere_center((data->m_side_length * 0.5f - 0.5f) * BS),
 	m_animation_force_timer(0), // force initial animation
 	m_last_crack(-1)
 {
@@ -597,10 +600,12 @@ MapBlockMesh::MapBlockMesh(Client *client, MeshMakeData *data, v3s16 camera_offs
 	for (auto &m : m_mesh)
 		m = make_irr<scene::SMesh>();
 
-	auto mesh_grid = client->getMeshGrid();
+	auto mesh_grid = data->m_mesh_grid;
 	v3s16 bp = data->m_blockpos;
-	// Only generate minimap mapblocks at even coordinates.
-	if (mesh_grid.isMeshPos(bp) && client->getMinimap()) {
+	// Only generate minimap mapblocks at grid aligned coordinates.
+	// FIXME: ^ doesn't really make sense. and in practice, bp is always aligned
+	if (mesh_grid.isMeshPos(bp) && data->m_generate_minimap) {
+		// meshgen area always fits into a grid cell
 		m_minimap_mapblocks.resize(mesh_grid.getCellVolume(), nullptr);
 		v3s16 ofs;
 
@@ -617,15 +622,10 @@ MapBlockMesh::MapBlockMesh(Client *client, MeshMakeData *data, v3s16 camera_offs
 		}
 	}
 
+	// algin vertices to mesh grid, not meshgen area
 	v3f offset = intToFloat((data->m_blockpos - mesh_grid.getMeshPos(data->m_blockpos)) * MAP_BLOCKSIZE, BS);
+
 	MeshCollector collector(m_bounding_sphere_center, offset);
-	/*
-		Add special graphics:
-		- torches
-		- flowing water
-		- fences
-		- whatever
-	*/
 
 	{
 		MapblockMeshGenerator(data, &collector).generate();
@@ -731,7 +731,7 @@ MapBlockMesh::MapBlockMesh(Client *client, MeshMakeData *data, v3s16 camera_offs
 		}
 	}
 
-	m_bsp_tree.buildTree(&m_transparent_triangles, data->side_length);
+	m_bsp_tree.buildTree(&m_transparent_triangles, data->m_side_length);
 
 	// Check if animation is required for this mesh
 	m_has_animation =
@@ -942,19 +942,19 @@ u8 get_solid_sides(MeshMakeData *data)
 {
 	std::unordered_map<v3s16, u8> results;
 	v3s16 blockpos_nodes = data->m_blockpos * MAP_BLOCKSIZE;
-	const NodeDefManager *ndef = data->nodedef;
+	const NodeDefManager *ndef = data->m_nodedef;
 
 	u8 result = 0x3F; // all sides solid;
 
-	for (s16 i = 0; i < data->side_length && result != 0; i++)
-	for (s16 j = 0; j < data->side_length && result != 0; j++) {
+	for (s16 i = 0; i < data->m_side_length && result != 0; i++)
+	for (s16 j = 0; j < data->m_side_length && result != 0; j++) {
 		v3s16 positions[6] = {
 			v3s16(0, i, j),
-			v3s16(data->side_length - 1, i, j),
+			v3s16(data->m_side_length - 1, i, j),
 			v3s16(i, 0, j),
-			v3s16(i, data->side_length - 1, j),
+			v3s16(i, data->m_side_length - 1, j),
 			v3s16(i, j, 0),
-			v3s16(i, j, data->side_length - 1)
+			v3s16(i, j, data->m_side_length - 1)
 		};
 
 		for (u8 k = 0; k < 6; k++) {

src/client/mapblock_mesh.h

@@ -36,15 +36,25 @@ struct MinimapMapblock;
 struct MeshMakeData
 {
 	VoxelManipulator m_vmanip;
+
+	// base pos of meshgen area, in blocks
 	v3s16 m_blockpos = v3s16(-1337,-1337,-1337);
+	// size of meshgen area, in nodes.
+	// vmanip will have at least an extra 1 node onion layer.
+	// area is expected to fit into mesh grid cell.
+	u16 m_side_length;
+	// vertex positions will be relative to this grid
+	MeshGrid m_mesh_grid;
+
+	// relative to blockpos
 	v3s16 m_crack_pos_relative = v3s16(-1337,-1337,-1337);
+	bool m_generate_minimap = false;
 	bool m_smooth_lighting = false;
 	bool m_enable_water_reflections = false;
-	u16 side_length;
 
-	const NodeDefManager *nodedef;
+	const NodeDefManager *m_nodedef;
 
-	MeshMakeData(const NodeDefManager *ndef, u16 side_length);
+	MeshMakeData(const NodeDefManager *ndef, u16 side_lingth, MeshGrid mesh_grid);
 
 	/*
 		Copy block data manually (to allow optimizations by the caller)

src/client/mesh_generator_thread.cpp

@@ -177,7 +177,8 @@ void MeshUpdateQueue::done(v3s16 pos)
 void MeshUpdateQueue::fillDataFromMapBlocks(QueuedMeshUpdate *q)
 {
 	auto mesh_grid = m_client->getMeshGrid();
-	MeshMakeData *data = new MeshMakeData(m_client->ndef(), MAP_BLOCKSIZE * mesh_grid.cell_size);
+	MeshMakeData *data = new MeshMakeData(m_client->ndef(),
+			MAP_BLOCKSIZE * mesh_grid.cell_size, mesh_grid);
 	q->data = data;
 
 	data->fillBlockDataBegin(q->p);
@@ -192,6 +193,7 @@ void MeshUpdateQueue::fillDataFromMapBlocks(QueuedMeshUpdate *q)
 	}
 
 	data->setCrack(q->crack_level, q->crack_pos);
+	data->m_generate_minimap = !!m_client->getMinimap();
 	data->m_smooth_lighting = m_cache_smooth_lighting;
 	data->m_enable_water_reflections = m_cache_enable_water_reflections;
 }

src/client/wieldmesh.cpp

@@ -309,8 +309,9 @@ void WieldMeshSceneNode::setExtruded(const std::string &imagename,
 static scene::SMesh *createSpecialNodeMesh(Client *client, MapNode n,
 	std::vector<ItemPartColor> *colors, const ContentFeatures &f)
 {
-	MeshMakeData mesh_make_data(client->ndef(), 1);
+	MeshMakeData mesh_make_data(client->ndef(), 1, client->getMeshGrid());
 	MeshCollector collector(v3f(0.0f * BS), v3f());
+	mesh_make_data.m_generate_minimap = false;
 	mesh_make_data.m_smooth_lighting = false;
 	mesh_make_data.m_enable_water_reflections = false;
 	MapblockMeshGenerator gen(&mesh_make_data, &collector);

src/unittest/test_content_mapblock.cpp

@@ -38,7 +38,8 @@ public:
 
 	MeshMakeData makeSingleNodeMMD(bool smooth_lighting = true)
 	{
-		MeshMakeData data{ndef(), 1};
+		MeshMakeData data{ndef(), 1, MeshGrid{1}};
+		data.m_generate_minimap = false;
 		data.m_smooth_lighting = smooth_lighting;
 		data.m_enable_water_reflections = false;
 		data.m_blockpos = {0, 0, 0};