godot/scene/2d/navigation_polygon.cpp

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/*************************************************************************/
/* navigation_polygon.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "navigation_polygon.h"
#include "core_string_names.h"
#include "navigation2d.h"
#include "triangulator.h"
void NavigationPolygon::set_vertices(const PoolVector<Vector2> &p_vertices) {
vertices = p_vertices;
}
PoolVector<Vector2> NavigationPolygon::get_vertices() const {
return vertices;
}
void NavigationPolygon::_set_polygons(const Array &p_array) {
polygons.resize(p_array.size());
for (int i = 0; i < p_array.size(); i++) {
polygons[i].indices = p_array[i];
}
}
Array NavigationPolygon::_get_polygons() const {
Array ret;
ret.resize(polygons.size());
for (int i = 0; i < ret.size(); i++) {
ret[i] = polygons[i].indices;
}
return ret;
}
void NavigationPolygon::_set_outlines(const Array &p_array) {
outlines.resize(p_array.size());
for (int i = 0; i < p_array.size(); i++) {
outlines[i] = p_array[i];
}
}
Array NavigationPolygon::_get_outlines() const {
Array ret;
ret.resize(outlines.size());
for (int i = 0; i < ret.size(); i++) {
ret[i] = outlines[i];
}
return ret;
}
void NavigationPolygon::add_polygon(const Vector<int> &p_polygon) {
Polygon polygon;
polygon.indices = p_polygon;
polygons.push_back(polygon);
}
void NavigationPolygon::add_outline_at_index(const PoolVector<Vector2> &p_outline, int p_index) {
outlines.insert(p_index, p_outline);
}
int NavigationPolygon::get_polygon_count() const {
return polygons.size();
}
Vector<int> NavigationPolygon::get_polygon(int p_idx) {
ERR_FAIL_INDEX_V(p_idx, polygons.size(), Vector<int>());
return polygons[p_idx].indices;
}
void NavigationPolygon::clear_polygons() {
polygons.clear();
}
void NavigationPolygon::add_outline(const PoolVector<Vector2> &p_outline) {
outlines.push_back(p_outline);
}
int NavigationPolygon::get_outline_count() const {
return outlines.size();
}
void NavigationPolygon::set_outline(int p_idx, const PoolVector<Vector2> &p_outline) {
ERR_FAIL_INDEX(p_idx, outlines.size());
outlines[p_idx] = p_outline;
}
void NavigationPolygon::remove_outline(int p_idx) {
ERR_FAIL_INDEX(p_idx, outlines.size());
outlines.remove(p_idx);
}
PoolVector<Vector2> NavigationPolygon::get_outline(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, outlines.size(), PoolVector<Vector2>());
return outlines[p_idx];
}
void NavigationPolygon::clear_outlines() {
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outlines.clear();
}
void NavigationPolygon::make_polygons_from_outlines() {
List<TriangulatorPoly> in_poly, out_poly;
Vector2 outside_point(-1e10, -1e10);
for (int i = 0; i < outlines.size(); i++) {
PoolVector<Vector2> ol = outlines[i];
int olsize = ol.size();
if (olsize < 3)
continue;
PoolVector<Vector2>::Read r = ol.read();
for (int j = 0; j < olsize; j++) {
outside_point.x = MAX(r[j].x, outside_point.x);
outside_point.y = MAX(r[j].y, outside_point.y);
}
}
outside_point += Vector2(0.7239784, 0.819238); //avoid precision issues
for (int i = 0; i < outlines.size(); i++) {
PoolVector<Vector2> ol = outlines[i];
int olsize = ol.size();
if (olsize < 3)
continue;
PoolVector<Vector2>::Read r = ol.read();
int interscount = 0;
//test if this is an outer outline
for (int k = 0; k < outlines.size(); k++) {
if (i == k)
continue; //no self intersect
PoolVector<Vector2> ol2 = outlines[k];
int olsize2 = ol2.size();
if (olsize2 < 3)
continue;
PoolVector<Vector2>::Read r2 = ol2.read();
for (int l = 0; l < olsize2; l++) {
if (Geometry::segment_intersects_segment_2d(r[0], outside_point, r2[l], r2[(l + 1) % olsize2], NULL)) {
interscount++;
}
}
}
bool outer = (interscount % 2) == 0;
TriangulatorPoly tp;
tp.Init(olsize);
for (int j = 0; j < olsize; j++) {
tp[j] = r[j];
}
if (outer)
tp.SetOrientation(TRIANGULATOR_CCW);
else {
tp.SetOrientation(TRIANGULATOR_CW);
tp.SetHole(true);
}
in_poly.push_back(tp);
}
TriangulatorPartition tpart;
if (tpart.ConvexPartition_HM(&in_poly, &out_poly) == 0) { //failed!
print_line("convex partition failed!");
return;
}
polygons.clear();
vertices.resize(0);
Map<Vector2, int> points;
for (List<TriangulatorPoly>::Element *I = out_poly.front(); I; I = I->next()) {
TriangulatorPoly &tp = I->get();
struct Polygon p;
for (int i = 0; i < tp.GetNumPoints(); i++) {
Map<Vector2, int>::Element *E = points.find(tp[i]);
if (!E) {
E = points.insert(tp[i], vertices.size());
vertices.push_back(tp[i]);
}
p.indices.push_back(E->get());
}
polygons.push_back(p);
}
emit_signal(CoreStringNames::get_singleton()->changed);
}
void NavigationPolygon::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_vertices", "vertices"), &NavigationPolygon::set_vertices);
ClassDB::bind_method(D_METHOD("get_vertices"), &NavigationPolygon::get_vertices);
ClassDB::bind_method(D_METHOD("add_polygon", "polygon"), &NavigationPolygon::add_polygon);
ClassDB::bind_method(D_METHOD("get_polygon_count"), &NavigationPolygon::get_polygon_count);
ClassDB::bind_method(D_METHOD("get_polygon", "idx"), &NavigationPolygon::get_polygon);
ClassDB::bind_method(D_METHOD("clear_polygons"), &NavigationPolygon::clear_polygons);
ClassDB::bind_method(D_METHOD("add_outline", "outline"), &NavigationPolygon::add_outline);
ClassDB::bind_method(D_METHOD("add_outline_at_index", "outline", "index"), &NavigationPolygon::add_outline_at_index);
ClassDB::bind_method(D_METHOD("get_outline_count"), &NavigationPolygon::get_outline_count);
ClassDB::bind_method(D_METHOD("set_outline", "idx", "outline"), &NavigationPolygon::set_outline);
ClassDB::bind_method(D_METHOD("get_outline", "idx"), &NavigationPolygon::get_outline);
ClassDB::bind_method(D_METHOD("remove_outline", "idx"), &NavigationPolygon::remove_outline);
ClassDB::bind_method(D_METHOD("clear_outlines"), &NavigationPolygon::clear_outlines);
ClassDB::bind_method(D_METHOD("make_polygons_from_outlines"), &NavigationPolygon::make_polygons_from_outlines);
ClassDB::bind_method(D_METHOD("_set_polygons", "polygons"), &NavigationPolygon::_set_polygons);
ClassDB::bind_method(D_METHOD("_get_polygons"), &NavigationPolygon::_get_polygons);
ClassDB::bind_method(D_METHOD("_set_outlines", "outlines"), &NavigationPolygon::_set_outlines);
ClassDB::bind_method(D_METHOD("_get_outlines"), &NavigationPolygon::_get_outlines);
ADD_PROPERTY(PropertyInfo(Variant::POOL_VECTOR3_ARRAY, "vertices", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_vertices", "get_vertices");
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "polygons", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "_set_polygons", "_get_polygons");
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "outlines", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "_set_outlines", "_get_outlines");
}
NavigationPolygon::NavigationPolygon() {
}
void NavigationPolygonInstance::set_enabled(bool p_enabled) {
if (enabled == p_enabled)
return;
enabled = p_enabled;
if (!is_inside_tree())
return;
if (!enabled) {
if (nav_id != -1) {
navigation->navpoly_remove(nav_id);
nav_id = -1;
}
} else {
if (navigation) {
if (navpoly.is_valid()) {
nav_id = navigation->navpoly_create(navpoly, get_relative_transform_to_parent(navigation), this);
}
}
}
if (get_tree()->is_editor_hint() || get_tree()->is_debugging_navigation_hint())
update();
//update_gizmo();
}
bool NavigationPolygonInstance::is_enabled() const {
return enabled;
}
/////////////////////////////
void NavigationPolygonInstance::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_ENTER_TREE: {
Node2D *c = this;
while (c) {
navigation = c->cast_to<Navigation2D>();
if (navigation) {
if (enabled && navpoly.is_valid()) {
nav_id = navigation->navpoly_create(navpoly, get_relative_transform_to_parent(navigation), this);
}
break;
}
c = c->get_parent()->cast_to<Node2D>();
}
} break;
case NOTIFICATION_TRANSFORM_CHANGED: {
if (navigation && nav_id != -1) {
navigation->navpoly_set_transform(nav_id, get_relative_transform_to_parent(navigation));
}
} break;
case NOTIFICATION_EXIT_TREE: {
if (navigation) {
if (nav_id != -1) {
navigation->navpoly_remove(nav_id);
nav_id = -1;
}
}
navigation = NULL;
} break;
case NOTIFICATION_DRAW: {
if (is_inside_tree() && (get_tree()->is_editor_hint() || get_tree()->is_debugging_navigation_hint()) && navpoly.is_valid()) {
PoolVector<Vector2> verts = navpoly->get_vertices();
int vsize = verts.size();
if (vsize < 3)
return;
Color color;
if (enabled) {
color = get_tree()->get_debug_navigation_color();
} else {
color = get_tree()->get_debug_navigation_disabled_color();
}
Vector<Color> colors;
Vector<Vector2> vertices;
vertices.resize(vsize);
colors.resize(vsize);
{
PoolVector<Vector2>::Read vr = verts.read();
for (int i = 0; i < vsize; i++) {
vertices[i] = vr[i];
colors[i] = color;
}
}
Vector<int> indices;
for (int i = 0; i < navpoly->get_polygon_count(); i++) {
Vector<int> polygon = navpoly->get_polygon(i);
for (int j = 2; j < polygon.size(); j++) {
int kofs[3] = { 0, j - 1, j };
for (int k = 0; k < 3; k++) {
int idx = polygon[kofs[k]];
ERR_FAIL_INDEX(idx, vsize);
indices.push_back(idx);
}
}
}
VS::get_singleton()->canvas_item_add_triangle_array(get_canvas_item(), indices, vertices, colors);
}
} break;
}
}
void NavigationPolygonInstance::set_navigation_polygon(const Ref<NavigationPolygon> &p_navpoly) {
if (p_navpoly == navpoly)
return;
if (navigation && nav_id != -1) {
navigation->navpoly_remove(nav_id);
nav_id = -1;
}
if (navpoly.is_valid()) {
navpoly->disconnect(CoreStringNames::get_singleton()->changed, this, "_navpoly_changed");
}
navpoly = p_navpoly;
if (navpoly.is_valid()) {
navpoly->connect(CoreStringNames::get_singleton()->changed, this, "_navpoly_changed");
}
if (navigation && navpoly.is_valid() && enabled) {
nav_id = navigation->navpoly_create(navpoly, get_relative_transform_to_parent(navigation), this);
}
//update_gizmo();
_change_notify("navpoly");
update_configuration_warning();
}
Ref<NavigationPolygon> NavigationPolygonInstance::get_navigation_polygon() const {
return navpoly;
}
void NavigationPolygonInstance::_navpoly_changed() {
if (is_inside_tree() && (get_tree()->is_editor_hint() || get_tree()->is_debugging_navigation_hint()))
update();
}
String NavigationPolygonInstance::get_configuration_warning() const {
if (!is_visible_in_tree() || !is_inside_tree())
return String();
if (!navpoly.is_valid()) {
return TTR("A NavigationPolygon resource must be set or created for this node to work. Please set a property or draw a polygon.");
}
const Node2D *c = this;
while (c) {
if (c->cast_to<Navigation2D>()) {
return String();
}
c = c->get_parent()->cast_to<Node2D>();
}
return TTR("NavigationPolygonInstance must be a child or grandchild to a Navigation2D node. It only provides navigation data.");
}
void NavigationPolygonInstance::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_navigation_polygon", "navpoly:NavigationPolygon"), &NavigationPolygonInstance::set_navigation_polygon);
ClassDB::bind_method(D_METHOD("get_navigation_polygon:NavigationPolygon"), &NavigationPolygonInstance::get_navigation_polygon);
ClassDB::bind_method(D_METHOD("set_enabled", "enabled"), &NavigationPolygonInstance::set_enabled);
ClassDB::bind_method(D_METHOD("is_enabled"), &NavigationPolygonInstance::is_enabled);
ClassDB::bind_method(D_METHOD("_navpoly_changed"), &NavigationPolygonInstance::_navpoly_changed);
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "navpoly", PROPERTY_HINT_RESOURCE_TYPE, "NavigationPolygon"), "set_navigation_polygon", "get_navigation_polygon");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "enabled"), "set_enabled", "is_enabled");
}
NavigationPolygonInstance::NavigationPolygonInstance() {
navigation = NULL;
nav_id = -1;
enabled = true;
set_notify_transform(true);
}