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-rw-r--r--extern/carve/lib/octree.cpp399
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diff --git a/extern/carve/lib/octree.cpp b/extern/carve/lib/octree.cpp
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-// Begin License:
-// Copyright (C) 2006-2014 Tobias Sargeant (tobias.sargeant@gmail.com).
-// All rights reserved.
-//
-// This file is part of the Carve CSG Library (http://carve-csg.com/)
-//
-// This file may be used under the terms of either the GNU General
-// Public License version 2 or 3 (at your option) as published by the
-// Free Software Foundation and appearing in the files LICENSE.GPL2
-// and LICENSE.GPL3 included in the packaging of this file.
-//
-// This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
-// INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE.
-// End:
-
-
-#if defined(HAVE_CONFIG_H)
-# include <carve_config.h>
-#endif
-
-#include <carve/octree_decl.hpp>
-#include <carve/octree_impl.hpp>
-
-#include <carve/poly_decl.hpp>
-
-namespace carve {
- namespace csg {
-
- Octree::Node::Node(const carve::geom3d::Vector &newMin, const carve::geom3d::Vector &newMax) :
- parent(NULL), is_leaf(true), min(newMin), max(newMax) {
- for (int i = 0; i < 8; ++i) children[i] = NULL;
- aabb = Octree::makeAABB(this);
- }
-
- Octree::Node::Node(Node *p, double x1, double y1, double z1, double x2, double y2, double z2) :
- parent(p), is_leaf(true), min(carve::geom::VECTOR(x1, y1, z1)), max(carve::geom::VECTOR(x2, y2, z2)) {
- for (int i = 0; i < 8; ++i) children[i] = NULL;
- aabb = Octree::makeAABB(this);
- }
-
- Octree::Node::~Node() {
- for (int i = 0; i < 8; ++i) {
- if (children[i] != NULL) {
- (*children[i]).~Node();
- }
- }
- if (children[0] != NULL) {
- char *ptr = (char*)children[0];
- delete[] ptr;
- }
- }
-
- bool Octree::Node::mightContain(const carve::poly::Face<3> &face) {
- if (face.nVertices() == 3) {
- return aabb.intersects(carve::geom::tri<3>(face.vertex(0)->v, face.vertex(1)->v, face.vertex(2)->v));
- } else {
- return aabb.intersects(face.aabb) && aabb.intersects(face.plane_eqn);
- }
- }
-
- bool Octree::Node::mightContain(const carve::poly::Edge<3> &edge) {
- return aabb.intersectsLineSegment(edge.v1->v, edge.v2->v);
- }
-
- bool Octree::Node::mightContain(const carve::poly::Vertex<3> &p) {
- return aabb.containsPoint(p.v);
- }
-
- bool Octree::Node::hasChildren() {
- return !is_leaf;
- }
-
- bool Octree::Node::split() {
- if (is_leaf && hasGeometry()) {
-
- carve::geom3d::Vector mid = 0.5 * (min + max);
- char *ptr = new char[sizeof(Node)*8];
- children[0] = new (ptr + sizeof(Node) * 0) Node(this, min.x, min.y, min.z, mid.x, mid.y, mid.z);
- children[1] = new (ptr + sizeof(Node) * 1) Node(this, mid.x, min.y, min.z, max.x, mid.y, mid.z);
- children[2] = new (ptr + sizeof(Node) * 2) Node(this, min.x, mid.y, min.z, mid.x, max.y, mid.z);
- children[3] = new (ptr + sizeof(Node) * 3) Node(this, mid.x, mid.y, min.z, max.x, max.y, mid.z);
- children[4] = new (ptr + sizeof(Node) * 4) Node(this, min.x, min.y, mid.z, mid.x, mid.y, max.z);
- children[5] = new (ptr + sizeof(Node) * 5) Node(this, mid.x, min.y, mid.z, max.x, mid.y, max.z);
- children[6] = new (ptr + sizeof(Node) * 6) Node(this, min.x, mid.y, mid.z, mid.x, max.y, max.z);
- children[7] = new (ptr + sizeof(Node) * 7) Node(this, mid.x, mid.y, mid.z, max.x, max.y, max.z);
-
- for (int i = 0; i < 8; ++i) {
- putInside(faces, children[i], children[i]->faces);
- putInside(edges, children[i], children[i]->edges);
- putInside(vertices, children[i], children[i]->vertices);
- }
-
- faces.clear();
- edges.clear();
- vertices.clear();
- is_leaf = false;
- }
- return is_leaf;
- }
-
- template <class T>
- void Octree::Node::putInside(const T &input, Node *child, T &output) {
- for (typename T::const_iterator it = input.begin(), e = input.end(); it != e; ++it) {
- if (child->mightContain(**it)) {
- output.push_back(*it);
- }
- }
- }
-
- bool Octree::Node::hasGeometry() {
- return faces.size() > 0 || edges.size() > 0 || vertices.size() > 0;
- }
-
- Octree::Octree() {
- root = NULL;
- }
-
- Octree::~Octree() {
- if (root) delete root;
- }
-
- void Octree::setBounds(const carve::geom3d::Vector &min, const carve::geom3d::Vector &max) {
- if (root) delete root;
- root = new Node(min, max);
- }
-
- void Octree::setBounds(carve::geom3d::AABB aabb) {
- if (root) delete root;
- aabb.extent = 1.1 * aabb.extent;
- root = new Node(aabb.min(), aabb.max());
- }
-
- void Octree::addEdges(const std::vector<carve::poly::Edge<3> > &e) {
- root->edges.reserve(root->edges.size() + e.size());
- for (size_t i = 0; i < e.size(); ++i) {
- root->edges.push_back(&e[i]);
- }
- }
-
- void Octree::addFaces(const std::vector<carve::poly::Face<3> > &f) {
- root->faces.reserve(root->faces.size() + f.size());
- for (size_t i = 0; i < f.size(); ++i) {
- root->faces.push_back(&f[i]);
- }
- }
-
- void Octree::addVertices(const std::vector<const carve::poly::Vertex<3> *> &p) {
- root->vertices.insert(root->vertices.end(), p.begin(), p.end());
- }
-
- carve::geom3d::AABB Octree::makeAABB(const Node *node) {
- carve::geom3d::Vector centre = 0.5 * (node->min + node->max);
- carve::geom3d::Vector size = SLACK_FACTOR * 0.5 * (node->max - node->min);
- return carve::geom3d::AABB(centre, size);
- }
-
- void Octree::doFindEdges(const carve::geom::aabb<3> &aabb,
- Node *node,
- std::vector<const carve::poly::Edge<3> *> &out,
- unsigned depth) const {
- if (node == NULL) {
- return;
- }
-
- if (node->aabb.intersects(aabb)) {
- if (node->hasChildren()) {
- for (int i = 0; i < 8; ++i) {
- doFindEdges(aabb, node->children[i], out, depth + 1);
- }
- } else {
- if (depth < MAX_SPLIT_DEPTH && node->edges.size() > EDGE_SPLIT_THRESHOLD) {
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doFindEdges(aabb, node->children[i], out, depth + 1);
- }
- return;
- }
- }
- for (std::vector<const carve::poly::Edge<3>*>::const_iterator it = node->edges.begin(), e = node->edges.end(); it != e; ++it) {
- if ((*it)->tag_once()) {
- out.push_back(*it);
- }
- }
- }
- }
- }
-
- void Octree::doFindEdges(const carve::geom3d::LineSegment &l,
- Node *node,
- std::vector<const carve::poly::Edge<3> *> &out,
- unsigned depth) const {
- if (node == NULL) {
- return;
- }
-
- if (node->aabb.intersectsLineSegment(l.v1, l.v2)) {
- if (node->hasChildren()) {
- for (int i = 0; i < 8; ++i) {
- doFindEdges(l, node->children[i], out, depth + 1);
- }
- } else {
- if (depth < MAX_SPLIT_DEPTH && node->edges.size() > EDGE_SPLIT_THRESHOLD) {
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doFindEdges(l, node->children[i], out, depth + 1);
- }
- return;
- }
- }
- for (std::vector<const carve::poly::Edge<3>*>::const_iterator it = node->edges.begin(), e = node->edges.end(); it != e; ++it) {
- if ((*it)->tag_once()) {
- out.push_back(*it);
- }
- }
- }
- }
- }
-
- void Octree::doFindEdges(const carve::geom3d::Vector &v,
- Node *node,
- std::vector<const carve::poly::Edge<3> *> &out,
- unsigned depth) const {
- if (node == NULL) {
- return;
- }
-
- if (node->aabb.containsPoint(v)) {
- if (node->hasChildren()) {
- for (int i = 0; i < 8; ++i) {
- doFindEdges(v, node->children[i], out, depth + 1);
- }
- } else {
- if (depth < MAX_SPLIT_DEPTH && node->edges.size() > EDGE_SPLIT_THRESHOLD) {
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doFindEdges(v, node->children[i], out, depth + 1);
- }
- return;
- }
- }
- for (std::vector<const carve::poly::Edge<3>*>::const_iterator
- it = node->edges.begin(), e = node->edges.end(); it != e; ++it) {
- if ((*it)->tag_once()) {
- out.push_back(*it);
- }
- }
- }
- }
- }
-
- void Octree::doFindFaces(const carve::geom::aabb<3> &aabb,
- Node *node,
- std::vector<const carve::poly::Face<3>*> &out,
- unsigned depth) const {
- if (node == NULL) {
- return;
- }
-
- if (node->aabb.intersects(aabb)) {
- if (node->hasChildren()) {
- for (int i = 0; i < 8; ++i) {
- doFindFaces(aabb, node->children[i], out, depth + 1);
- }
- } else {
- if (depth < MAX_SPLIT_DEPTH && node->faces.size() > FACE_SPLIT_THRESHOLD) {
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doFindFaces(aabb, node->children[i], out, depth + 1);
- }
- return;
- }
- }
- for (std::vector<const carve::poly::Face<3>*>::const_iterator it = node->faces.begin(), e = node->faces.end(); it != e; ++it) {
- if ((*it)->tag_once()) {
- out.push_back(*it);
- }
- }
- }
- }
- }
-
- void Octree::doFindFaces(const carve::geom3d::LineSegment &l,
- Node *node,
- std::vector<const carve::poly::Face<3>*> &out,
- unsigned depth) const {
- if (node == NULL) {
- return;
- }
-
- if (node->aabb.intersectsLineSegment(l.v1, l.v2)) {
- if (node->hasChildren()) {
- for (int i = 0; i < 8; ++i) {
- doFindFaces(l, node->children[i], out, depth + 1);
- }
- } else {
- if (depth < MAX_SPLIT_DEPTH && node->faces.size() > FACE_SPLIT_THRESHOLD) {
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doFindFaces(l, node->children[i], out, depth + 1);
- }
- return;
- }
- }
- for (std::vector<const carve::poly::Face<3>*>::const_iterator it = node->faces.begin(), e = node->faces.end(); it != e; ++it) {
- if ((*it)->tag_once()) {
- out.push_back(*it);
- }
- }
- }
- }
- }
-
- void Octree::doFindVerticesAllowDupes(const carve::geom3d::Vector &v, Node *node, std::vector<const carve::poly::Vertex<3> *> &out, unsigned depth) const {
- if (node == NULL) {
- return;
- }
-
- if (node->aabb.containsPoint(v)) {
- if (node->hasChildren()) {
- for (int i = 0; i < 8; ++i) {
- doFindVerticesAllowDupes(v, node->children[i], out, depth + 1);
- }
- } else {
- if (depth < MAX_SPLIT_DEPTH && node->vertices.size() > POINT_SPLIT_THRESHOLD) {
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doFindVerticesAllowDupes(v, node->children[i], out, depth + 1);
- }
- return;
- }
- }
- for (std::vector<const carve::poly::Vertex<3> *>::const_iterator it = node->vertices.begin(), e = node->vertices.end(); it != e; ++it) {
- out.push_back(*it);
- }
- }
- }
- }
-
- void Octree::findEdgesNear(const carve::geom::aabb<3> &aabb, std::vector<const carve::poly::Edge<3>*> &out) const {
- tagable::tag_begin();
- doFindEdges(aabb, root, out, 0);
- }
-
- void Octree::findEdgesNear(const carve::geom3d::LineSegment &l, std::vector<const carve::poly::Edge<3>*> &out) const {
- tagable::tag_begin();
- doFindEdges(l, root, out, 0);
- }
-
- void Octree::findEdgesNear(const carve::poly::Edge<3> &e, std::vector<const carve::poly::Edge<3>*> &out) const {
- tagable::tag_begin();
- doFindEdges(carve::geom3d::LineSegment(e.v1->v, e.v2->v), root, out, 0);
- }
-
- void Octree::findEdgesNear(const carve::geom3d::Vector &v, std::vector<const carve::poly::Edge<3>*> &out) const {
- tagable::tag_begin();
- doFindEdges(v, root, out, 0);
- }
-
- void Octree::findFacesNear(const carve::geom::aabb<3> &aabb, std::vector<const carve::poly::Face<3>*> &out) const {
- tagable::tag_begin();
- doFindFaces(aabb, root, out, 0);
- }
-
- void Octree::findFacesNear(const carve::geom3d::LineSegment &l, std::vector<const carve::poly::Face<3>*> &out) const {
- tagable::tag_begin();
- doFindFaces(l, root, out, 0);
- }
-
- void Octree::findFacesNear(const carve::poly::Edge<3> &e, std::vector<const carve::poly::Face<3>*> &out) const {
- tagable::tag_begin();
- doFindFaces(carve::geom3d::LineSegment(e.v1->v, e.v2->v), root, out, 0);
- }
-
- void Octree::findVerticesNearAllowDupes(const carve::geom3d::Vector &v, std::vector<const carve::poly::Vertex<3> *> &out) const {
- tagable::tag_begin();
- doFindVerticesAllowDupes(v, root, out, 0);
- }
-
- void Octree::doSplit(int maxSplit, Node *node) {
- // Don't split down any further than 4 levels.
- if (maxSplit <= 0 || (node->edges.size() < 5 && node->faces.size() < 5)) {
- return;
- }
-
- if (!node->split()) {
- for (int i = 0; i < 8; ++i) {
- doSplit(maxSplit - 1, node->children[i]);
- }
- }
- }
-
- void Octree::splitTree() {
- // initially split 4 levels
- doSplit(0, root);
- }
-
- }
-}
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