textures/base/pack/cdb_add.png

/*
Minetest
Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>,
Copyright (C) 2012-2018 RealBadAngel, Maciej Kasatkin
Copyright (C) 2015-2018 paramat

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "irr_v3d.h"
#include <stack>
#include "util/pointer.h"
#include "util/numeric.h"
#include "map.h"
#include "mapblock.h"
#include "nodedef.h"
#include "treegen.h"
#include "voxelalgorithms.h"

namespace treegen
{

void make_tree(MMVManip &vmanip, v3s16 p0, bool is_apple_tree,
	const NodeDefManager *ndef, s32 seed)
{
	/*
		NOTE: Tree-placing code is currently duplicated in the engine
		and in games that have saplings; both are deprecated but not
		replaced yet
	*/
	MapNode treenode(ndef->getId("mapgen_tree"));
	MapNode leavesnode(ndef->getId("mapgen_leaves"));
	MapNode applenode(ndef->getId("mapgen_apple"));
	if (treenode == CONTENT_IGNORE)
		errorstream << "Treegen: Mapgen alias 'mapgen_tree' is invalid!" << std::endl;
	if (leavesnode == CONTENT_IGNORE)
		errorstream << "Treegen: Mapgen alias 'mapgen_leaves' is invalid!" << std::endl;
	if (applenode == CONTENT_IGNORE)
		errorstream << "Treegen: Mapgen alias 'mapgen_apple' is invalid!" << std::endl;

	PseudoRandom pr(seed);
	s16 trunk_h = pr.range(4, 5);
	v3s16 p1 = p0;
	for (s16 ii = 0; ii < trunk_h; ii++) {
		if (vmanip.m_area.contains(p1)) {
			u32 vi = vmanip.m_area.index(p1);
			vmanip.m_data[vi] = treenode;
		}
		p1.Y++;
	}

	// p1 is now the last piece of the trunk
	p1.Y -= 1;

	VoxelArea leaves_a(v3s16(-2, -1, -2), v3s16(2, 2, 2));
	Buffer<u8> leaves_d(leaves_a.getVolume());
	for (s32 i = 0; i < leaves_a.getVolume(); i++)
		leaves_d[i] = 0;

	// Force leaves at near the end of the trunk
	s16 d = 1;
	for (s16 z = -d; z <= d; z++)
	for (s16 y = -d; y <= d; y++)
	for (s16 x = -d; x <= d; x++) {
		leaves_d[leaves_a.index(v3s16(x, y, z))] = 1;
	}

	// Add leaves randomly
	for (u32 iii = 0; iii < 7; iii++) {
		v3s16 p(
			pr.range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X - d),
			pr.range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y - d),
			pr.range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z - d)
		);

		for (s16 z = 0; z <= d; z++)
		for (s16 y = 0; y <= d; y++)
		for (s16 x = 0; x <= d; x++) {
			leaves_d[leaves_a.index(p + v3s16(x, y, z))] = 1;
		}
	}

	// Blit leaves to vmanip
	for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
	for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
		v3s16 pmin(leaves_a.MinEdge.X, y, z);
		u32 i = leaves_a.index(pmin);
		u32 vi = vmanip.m_area.index(pmin + p1);
		for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
			v3s16 p(x, y, z);
			if (vmanip.m_area.contains(p + p1) &&
					(vmanip.m_data[vi].getContent() == CONTENT_AIR ||
					vmanip.m_data[vi].getContent() == CONTENT_IGNORE)) {
				if (leaves_d[i] == 1) {
					bool is_apple = pr.range(0, 99) < 10;
					if (is_apple_tree && is_apple)
						vmanip.m_data[vi] = applenode;
					else
						vmanip.m_data[vi] = leavesnode;
				}
			}
			vi++;
			i++;
		}
	}
}


// L-System tree LUA spawner
treegen::error spawn_ltree(ServerMap *map, v3s16 p0,
	const NodeDefManager *ndef, const TreeDef &tree_definition)
{
	std::map<v3s16, MapBlock*> modified_blocks;
	MMVManip vmanip(map);
	v3s16 tree_blockp = getNodeBlockPos(p0);
	treegen::error e;

	vmanip.initialEmerge(tree_blockp - v3s16(1, 1, 1), tree_blockp + v3s16(1, 3, 1));
	e = make_ltree(vmanip, p0, ndef, tree_definition);
	if (e != SUCCESS)
		return e;

	voxalgo::blit_back_with_light(map, &vmanip, &modified_blocks);

	// Send a MEET_OTHER event
	MapEditEvent event;
	event.type = MEET_OTHER;
	for (auto &modified_block : modified_blocks)
		event.modified_blocks.insert(modified_block.first);
	map->dispatchEvent(event);
	return SUCCESS;
}


//L-System tree generator
treegen::error make_ltree(MMVManip &vmanip, v3s16 p0,
	const NodeDefManager *ndef, TreeDef tree_definition)
{
	s32 seed;
	if (tree_definition.explicit_seed)
		seed = tree_definition.seed + 14002;
	else
		seed = p0.X * 2 + p0.Y * 4 + p0.Z;  // use the tree position to seed PRNG
	PseudoRandom ps(seed);

	// chance of inserting abcd rules
	double prop_a = 9;
	double prop_b = 8;
	double prop_c = 7;
	double prop_d = 6;

	//randomize tree growth level, minimum=2
	s16 iterations = tree_definition.iterations;
	if (tree_definition.iterations_random_level > 0)
		iterations -= ps.range(0, tree_definition.iterations_random_level);
	if (iterations < 2)
		iterations = 2;

	s16 MAX_ANGLE_OFFSET = 5;
	double angle_in_radians = (double)tree_definition.angle * M_PI / 180;
	double angleOffset_in_radians = (s16)(ps.range(0, 1) % MAX_ANGLE_OFFSET) * M_PI / 180;

	//initialize rotation matrix, position and stacks for branches
	core::matrix4 rotation;
	rotation = setRotationAxisRadians(rotation, M_PI / 2, v3f(0, 0, 1));
	v3f position;
	position.X = p0.X;
	position.Y = p0.Y;
	position.Z = p0.Z;
	std::stack <core::matrix4> stack_orientation;
	std::stack <v3f> stack_position;

	//generate axiom
	std::string axiom = tree_definition.initial_axiom;
	for (s16 i = 0; i < iterations; i++) {
		std::string temp;
		for (s16 j = 0; j < (s16)axiom.size(); j++) {
			char axiom_char = axiom.at(j);
			switch (axiom_char) {
			case 'A':
				temp += tree_definition.rules_a;
				break;
			case 'B':
				temp += tree_definition.rules_b;
				break;
			case 'C':
				temp += tree_definition.rules_c;
				break;
			case 'D':
				temp += tree_definition.rules_d;
				break;
			case 'a':
				if (prop_a >= ps.range(1, 10))
					temp += tree_definition.rules_a;
				break;
			case 'b':
				if (prop_b >= ps.range(1, 10))
					temp += tree_definition.rules_b;
				break;
			case 'c':
				if (prop_c >= ps.range(1, 10))
					temp += tree_definition.rules_c;
				break;
			case 'd':
				if (prop_d >= ps.range(1, 10))
					temp += tree_definition.rules_d;
				break;
			default:
				temp += axiom_char;
				break;
			}
		}
		axiom = temp;
	}

	// Add trunk nodes below a wide trunk to avoid gaps when tree is on sloping ground
	if (tree_definition.trunk_type == "double") {
		tree_trunk_placement(
			vmanip,
			v3f(position.X + 1, position.Y - 1, position.Z),
			tree_definition
		);
		tree_trunk_placement(
			vmanip,
			v3f(position.X, position.Y - 1, position.Z + 1),
			tree_definition
		);
		tree_trunk_placement(
			vmanip,
			v3f(position.X + 1, position.Y - 1, position.Z + 1),
			tree_definition
		);
	} else if (tree_definition.trunk_type == "crossed") {
		tree_trunk_placement(
			vmanip,
			v3f(position.X + 1, position.Y - 1, position.Z),
			tree_definition
		);
		tree_trunk_placement(
			vmanip,
			v3f(position.X - 1, position.Y - 1, position.Z),
			tree_definition
		);
		tree_trunk_placement(
			vmanip,
			v3f(position.X, position.Y - 1, position.Z + 1),
			tree_definition
		);
		tree_trunk_placement(
			vmanip,
			v3f(position.X, position.Y - 1, position.Z - 1),
			tree_definition
		);
	}

	/* build tree out of generated axiom

	Key for Special L-System Symbols used in Axioms

    G  - move forward one unit with the pen up
    F  - move forward one unit with the pen down drawing trunks and branches
    f  - move forward one unit with the pen down drawing leaves (100% chance)
    T  - move forward one unit with the pen down drawing trunks only
    R  - move forward one unit with the pen down placing fruit
    A  - replace with rules set A
    B  - replace with rules set B
    C  - replace with rules set C
    D  - replace with rules set D
    a  - replace with rules set A, chance 90%
    b  - replace with rules set B, chance 80%
    c  - replace with rules set C, chance 70%
    d  - replace with rules set D, chance 60%
    +  - yaw the turtle right by angle degrees
    -  - yaw the turtle left by angle degrees
    &  - pitch the turtle down by angle degrees
    ^  - pitch the turtle up by angle degrees
    /  - roll the turtle to the right by angle degrees
    *  - roll the turtle to the left by angle degrees
    [  - save in stack current state info
    ]  - recover from stack state info

    */

	s16 x,y,z;
	for (s16 i = 0; i < (s16)axiom.size(); i++) {
		char axiom_char = axiom.at(i);
		core::matrix4 temp_rotation;
		temp_rotation.makeIdentity();
		v3f dir;
		switch (axiom_char) {
		case 'G':
			dir = v3f(1, 0, 0);
			dir = transposeMatrix(rotation, dir);
			position += dir;
			break;
		case 'T':
			tree_trunk_placement(
				vmanip,
				v3f(position.X, position.Y, position.Z),
				tree_definition
			);
			if (tree_definition.trunk_type == "double" &&
					!tree_definition.thin_branches) {
				tree_trunk_placement(
					vmanip,
					v3f(position.X + 1, position.Y, position.Z),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X, position.Y, position.Z + 1),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X + 1, position.Y, position.Z + 1),
					tree_definition
				);
			} else if (tree_definition.trunk_type == "crossed" &&
					!tree_definition.thin_branches) {
				tree_trunk_placement(
					vmanip,
					v3f(position.X + 1, position.Y, position.Z),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X - 1, position.Y, position.Z),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X, position.Y, position.Z + 1),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X, position.Y, position.Z - 1),
					tree_definition
				);
			}
			dir = v3f(1, 0, 0);
			dir = transposeMatrix(rotation, dir);
			position += dir;
			break;
		case 'F':
			tree_trunk_placement(
				vmanip,
				v3f(position.X, position.Y, position.Z),
				tree_definition
			);
			if ((stack_orientation.empty() &&
					tree_definition.trunk_type == "double") ||
					(!stack_orientation.empty() &&
					tree_definition.trunk_type == "double" &&
					!tree_definition.thin_branches)) {
				tree_trunk_placement(
					vmanip,
					v3f(position.X + 1, position.Y, position.Z),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X, position.Y, position.Z + 1),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X + 1, position.Y, position.Z + 1),
					tree_definition
				);
			} else if ((stack_orientation.empty() &&
					tree_definition.trunk_type == "crossed") ||
					(!stack_orientation.empty() &&
					tree_definition.trunk_type == "crossed" &&
					!tree_definition.thin_branches)) {
				tree_trunk_placement(
					vmanip,
					v3f(position.X + 1, position.Y, position.Z),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X - 1, position.Y, position.Z),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X, position.Y, position.Z + 1),
					tree_definition
				);
				tree_trunk_placement(
					vmanip,
					v3f(position.X, position.Y, position.Z - 1),
					tree_definition
				);
			}
			if (!stack_orientation.empty()) {
				s16 size = 1;
				for (x = -size; x <= size; x++)
				for (y = -size; y <= size; y++)
				for (z = -size; z <= size; z++) {
					if (abs(x) == size &&
							abs(y) == size &&
							abs(z) == size) {
						tree_leaves_placement(
							vmanip,
							v3f(position.X + x + 1, position.Y + y,
									position.Z + z),
							ps.next(),
							tree_definition
						);
						tree_leaves_placement(
							vmanip,
							v3f(position.X + x - 1, position.Y + y,
									position.Z + z),
							ps.next(),
							tree_definition
						);
						tree_leaves_placement(
							vmanip,v3f(position.X + x, position.Y + y,
									position.Z + z + 1),
							ps.next(),
							tree_definition
						);
						tree_leaves_placement(
							vmanip,v3f(position.X + x, position.Y + y,
									position.Z + z - 1),
							ps.next(),
							tree_definition
						);
					}
				}
			}
			dir = v3f(1, 0, 0);
			dir = transposeMatrix(rotation, dir);
			position += dir;
			break;
		case 'f':
			tree_single_leaves_placement(
				vmanip,
				v3f(position.X, position.Y, position.Z),
				ps.next(),
				tree_definition
			);
			dir = v3f(1, 0, 0);
			dir = transposeMatrix(rotation, dir);
			position += dir;
			break;
		case 'R':
			tree_fruit_placement(
				vmanip,
				v3f(position.X, position.Y, position.Z),
				tree_definition
			);
			dir = v3f(1, 0, 0);
			dir = transposeMatrix(rotation, dir);
			position += dir;
			break;

		// turtle orientation commands
		case '[':
			stack_orientation.push(rotation);
			stack_position.push(position);
			break;
		case ']':
			if (stack_orientation.empty())
				return UNBALANCED_BRACKETS;
			rotation = stack_orientation.top();
			stack_orientation.pop();
			position = stack_position.top();
			stack_position.pop();
			break;
		case '+':
			temp_rotation.makeIdentity();
			temp_rotation = setRotationAxisRadians(temp_rotation,
					angle_in_radians + angleOffset_in_radians, v3f(0, 0, 1));
			rotation *= temp_rotation;
			break;
		case '-':
			temp_rotation.makeIdentity();
			temp_rotation = setRotationAxisRadians(temp_rotation,
					angle_in_radians + angleOffset_in_radians, v3f(0, 0, -1));
			rotation *= temp_rotation;
			break;
		case '&':
			temp_rotation.makeIdentity();
			temp_rotation = setRotationAxisRadians(temp_rotation,
					angle_in_radians + angleOffset_in_radians, v3f(0, 1, 0));
			rotation *= temp_rotation;
			break;
		case '^':
			temp_rotation.makeIdentity();
			temp_rotation = setRotationAxisRadians(temp_rotation,
					angle_in_radians + angleOffset_in_radians, v3f(0, -1, 0));
			rotation *= temp_rotation;
			break;
		case '*':
			temp_rotation.makeIdentity();
			temp_rotation = setRotationAxisRadians(temp_rotation,
					angle_in_radians, v3f(1, 0, 0));
			rotation *= temp_rotation;
			break;
		case '/':
			temp_rotation.makeIdentity();
			temp_rotation = setRotationAxisRadians(temp_rotation,
					angle_in_radians, v3f(-1, 0, 0));
			rotation *= temp_rotation;
			break;
		default:
			break;
		}
	}

	return SUCCESS;
}


void tree_trunk_placement(MMVManip &vmanip, v3f p0, TreeDef &tree_definition)
{
	v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
	if (!vmanip.m_area.contains(p1))
		return;
	u32 vi = vmanip.m_area.index(p1);
	content_t current_node = vmanip.m_data[vi].getContent();
	if (current_node != CONTENT_AIR && current_node != CONTENT_IGNORE
			&& current_node != tree_definition.leavesnode.getContent()
			&& current_node != tree_definition.leaves2node.getContent()
			&& current_node != tree_definition.fruitnode.getContent())
		return;
	vmanip.m_data[vi] = tree_definition.trunknode;
}


void tree_leaves_placement(MMVManip &vmanip, v3f p0,
		PseudoRandom ps, TreeDef &tree_definition)
{
	MapNode leavesnode = tree_definition.leavesnode;
	if (ps.range(1, 100) > 100 - tree_definition.leaves2_chance)
		leavesnode = tree_definition.leaves2node;
	v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
	if (!vmanip.m_area.contains(p1))
		return;
	u32 vi = vmanip.m_area.index(p1);
	if (vmanip.m_data[vi].getContent() != CONTENT_AIR
			&& vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
		return;
	if (tree_definition.fruit_chance > 0) {
		if (ps.range(1, 100) > 100 - tree_definition.fruit_chance)
			vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.fruitnode;
		else
			vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
	} else if (ps.range(1, 100) > 20) {
		vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
	}
}


void tree_single_leaves_placement(MMVManip &vmanip, v3f p0,
		PseudoRandom ps, TreeDef &tree_definition)
{
	MapNode leavesnode = tree_definition.leavesnode;
	if (ps.range(1, 100) > 100 - tree_definition.leaves2_chance)
		leavesnode = tree_definition.leaves2node;
	v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
	if (!vmanip.m_area.contains(p1))
		return;
	u32 vi = vmanip.m_area.index(p1);
	if (vmanip.m_data[vi].getContent() != CONTENT_AIR
			&& vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
		return;
	vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
}


void tree_fruit_placement(MMVManip &vmanip, v3f p0, TreeDef &tree_definition)
{
	v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
	if (!vmanip.m_area.contains(p1))
		return;
	u32 vi = vmanip.m_area.index(p1);
	if (vmanip.m_data[vi].getContent() != CONTENT_AIR
			&& vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
		return;
	vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.fruitnode;
}


irr::core::matrix4 setRotationAxisRadians(irr::core::matrix4 M, double angle, v3f axis)
{
	double c = cos(angle);
	double s = sin(angle);
	double t = 1.0 - c;

	double tx  = t * axis.X;
	double ty  = t * axis.Y;
	double tz  = t * axis.Z;
	double sx  = s * axis.X;
	double sy  = s * axis.Y;
	double sz  = s * axis.Z;

	M[0] = tx * axis.X + c;
	M[1] = tx * axis.Y + sz;
	M[2] = tx * axis.Z - sy;

	M[4] = ty * axis.X - sz;
	M[5] = ty * axis.Y + c;
	M[6] = ty * axis.Z + sx;

	M[8]  = tz * axis.X + sy;
	M[9]  = tz * axis.Y - sx;
	M[10] = tz * axis.Z + c;
	return M;
}


v3f transposeMatrix(irr::core::matrix4 M, v3f v)
{
	v3f translated;
	double x = M[0] * v.X + M[4] * v.Y + M[8]  * v.Z +M[12];
	double y = M[1] * v.X + M[5] * v.Y + M[9]  * v.Z +M[13];
	double z = M[2] * v.X + M[6] * v.Y + M[10] * v.Z +M[14];
	translated.X = x;
	translated.Y = y;
	translated.Z = z;
	return translated;
}


void make_jungletree(MMVManip &vmanip, v3s16 p0, const NodeDefManager *ndef,
	s32 seed)
{
	/*
		NOTE: Tree-placing code is currently duplicated in the engine
		and in games that have saplings; both are deprecated but not
		replaced yet
	*/
	content_t c_tree   = ndef->getId("mapgen_jungletree");
	content_t c_leaves = ndef->getId("mapgen_jungleleaves");
	if (c_tree == CONTENT_IGNORE)
		c_tree = ndef->getId("mapgen_tree");
	if (c_leaves == CONTENT_IGNORE)
		c_leaves = ndef->getId("mapgen_leaves");
	if (c_tree == CONTENT_IGNORE)
		errorstream << "Treegen: Mapgen alias 'mapgen_jungletree' is invalid!" << std::endl;
	if (c_leaves == CONTENT_IGNORE)
		errorstream << "Treegen: Mapgen alias 'mapgen_jungleleaves' is invalid!" << std::endl;

	MapNode treenode(c_tree);
	MapNode leavesnode(c_leaves);

	PseudoRandom pr(seed);
	for (s16 x= -1; x <= 1; x++)
	for (s16 z= -1; z <= 1; z++) {
		if (pr.range(0, 2) == 0)
			continue;
		v3s16 p1 = p0 + v3s16(x, 0, z);
		v3s16 p2 = p0 + v3s16(x, -1, z);
		u32 vi1 = vmanip.m_area.index(p1);
		u32 vi2 = vmanip.m_area.index(p2);

		if (vmanip.m_area.contains(p2) &&
				vmanip.m_data[vi2].getContent() == CONTENT_AIR)
			vmanip.m_data[vi2] = treenode;
		else if (vmanip.m_area.contains(p1) &&
				vmanip.m_data[vi1].getContent() == CONTENT_AIR)
			vmanip.m_data[vi1] = treenode;
	}
	vmanip.m_data[vmanip.m_area.index(p0)] = treenode;

	s16 trunk_h = pr.range(8, 12);
	v3s16 p1 = p0;
	for (s16 ii = 0; ii < trunk_h; ii++) {
		if (vmanip.m_area.contains(p1)) {
			u32 vi = vmanip.m_area.index(p1);
			vmanip.m_data[vi] = treenode;
		}
		p1.Y++;
	}

	// p1 is now the last piece of the trunk
	p1.Y -= 1;

	VoxelArea leaves_a(v3s16(-3, -2, -3), v3s16(3, 2, 3));
	//SharedPtr<u8> leaves_d(new u8[leaves_a.getVolume()]);
	Buffer<u8> leaves_d(leaves_a.getVolume());
	for (s32 i = 0; i < leaves_a.getVolume(); i++)
		leaves_d[i] = 0;

	// Force leaves at near the end of the trunk
	s16 d = 1;
	for (s16 z = -d; z <= d; z++)
	for (s16 y = -d; y <= d; y++)
	for (s16 x = -d; x <= d; x++) {
		leaves_d[leaves_a.index(v3s16(x,y,z))] = 1;
	}

	// Add leaves randomly
	for (u32 iii = 0; iii < 30; iii++) {
		v3s16 p(
			pr.range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X - d),
			pr.range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y - d),
			pr.range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z - d)
		);

		for (s16 z = 0; z <= d; z++)
		for (s16 y = 0; y <= d; y++)
		for (s16 x = 0; x <= d; x++) {
			leaves_d[leaves_a.index(p + v3s16(x, y, z))] = 1;
		}
	}

	// Blit leaves to vmanip
	for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 20 00 00 00 20 02 03 00 00 00 0e 14 92	.PNG........IHDR................
0020	67 00 00 00 0c 50 4c 54 45 00 00 00 b6 d5 3c 71 aa 34 39 7b 44 3c c9 f4 d1 00 00 00 01 74 52 4e	g....PLTE.....<q.49{D<.......tRN
0040	53 00 40 e6 d8 66 00 00 00 35 49 44 41 54 78 da 63 60 a0 1e e0 5a 80 ce e0 4c 80 32 58 03 70 31	S.@..f...5IDATx.c`...Z...L.2X.p1
0060	56 86 86 66 81 19 4b 43 43 a3 50 19 70 a9 ff 5f e3 ff e3 32 07 6e 05 a6 ed fc 1f 28 f7 13 00 95	V..f..KCC.P.p.._...2.n.....(....
0080	62 10 41 8e c5 d5 1b 00 00 00 00 49 45 4e 44 ae 42 60 82	b.A........IEND.B`.