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godot/scene/2d/path_2d.cpp

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/**************************************************************************/
/* path_2d.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "path_2d.h"
#include "core/math/geometry_2d.h"
#include "scene/main/timer.h"
#ifdef TOOLS_ENABLED
#include "editor/themes/editor_scale.h"
#endif
#ifdef DEBUG_ENABLED
Rect2 Path2D::_edit_get_rect() const {
if (!curve.is_valid() || curve->get_point_count() == 0) {
return Rect2(0, 0, 0, 0);
}
Rect2 aabb = Rect2(curve->get_point_position(0), Vector2(0, 0));
for (int i = 0; i < curve->get_point_count(); i++) {
for (int j = 0; j <= 8; j++) {
real_t frac = j / 8.0;
Vector2 p = curve->sample(i, frac);
aabb.expand_to(p);
}
}
return aabb;
}
bool Path2D::_edit_use_rect() const {
return curve.is_valid() && curve->get_point_count() != 0;
}
bool Path2D::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const {
if (curve.is_null()) {
return false;
}
for (int i = 0; i < curve->get_point_count(); i++) {
Vector2 s[2];
s[0] = curve->get_point_position(i);
for (int j = 1; j <= 8; j++) {
real_t frac = j / 8.0;
s[1] = curve->sample(i, frac);
Vector2 p = Geometry2D::get_closest_point_to_segment(p_point, s);
if (p.distance_to(p_point) <= p_tolerance) {
return true;
}
s[0] = s[1];
}
}
return false;
}
#endif
void Path2D::_notification(int p_what) {
switch (p_what) {
// Draw the curve if path debugging is enabled.
case NOTIFICATION_DRAW: {
if (!curve.is_valid()) {
break;
}
if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_paths_hint()) {
return;
}
if (curve->get_point_count() < 2) {
return;
}
#ifdef TOOLS_ENABLED
const real_t line_width = get_tree()->get_debug_paths_width() * EDSCALE;
#else
const real_t line_width = get_tree()->get_debug_paths_width();
#endif
real_t interval = 10;
const real_t length = curve->get_baked_length();
if (length > CMP_EPSILON) {
const int sample_count = int(length / interval) + 2;
interval = length / (sample_count - 1); // Recalculate real interval length.
Vector<Transform2D> frames;
frames.resize(sample_count);
{
Transform2D *w = frames.ptrw();
for (int i = 0; i < sample_count; i++) {
w[i] = curve->sample_baked_with_rotation(i * interval, false);
}
}
const Transform2D *r = frames.ptr();
// Draw curve segments
{
PackedVector2Array v2p;
v2p.resize(sample_count);
Vector2 *w = v2p.ptrw();
for (int i = 0; i < sample_count; i++) {
w[i] = r[i].get_origin();
}
draw_polyline(v2p, get_tree()->get_debug_paths_color(), line_width, false);
}
// Draw fish bones
{
PackedVector2Array v2p;
v2p.resize(3);
Vector2 *w = v2p.ptrw();
for (int i = 0; i < sample_count; i++) {
const Vector2 p = r[i].get_origin();
const Vector2 side = r[i].columns[1];
const Vector2 forward = r[i].columns[0];
// Fish Bone.
w[0] = p + (side - forward) * 5;
w[1] = p;
w[2] = p + (-side - forward) * 5;
draw_polyline(v2p, get_tree()->get_debug_paths_color(), line_width * 0.5, false);
}
}
}
} break;
}
}
void Path2D::_curve_changed() {
if (!is_inside_tree()) {
return;
}
for (int i = 0; i < get_child_count(); i++) {
PathFollow2D *follow = Object::cast_to<PathFollow2D>(get_child(i));
if (follow) {
follow->path_changed();
}
}
if (Engine::get_singleton()->is_editor_hint() || get_tree()->is_debugging_paths_hint()) {
queue_redraw();
}
}
void Path2D::set_curve(const Ref<Curve2D> &p_curve) {
if (curve.is_valid()) {
curve->disconnect_changed(callable_mp(this, &Path2D::_curve_changed));
}
curve = p_curve;
if (curve.is_valid()) {
curve->connect_changed(callable_mp(this, &Path2D::_curve_changed));
}
_curve_changed();
}
Ref<Curve2D> Path2D::get_curve() const {
return curve;
}
void Path2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_curve", "curve"), &Path2D::set_curve);
ClassDB::bind_method(D_METHOD("get_curve"), &Path2D::get_curve);
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve2D", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT), "set_curve", "get_curve");
}
/////////////////////////////////////////////////////////////////////////////////
void PathFollow2D::path_changed() {
if (update_timer && !update_timer->is_stopped()) {
update_timer->start();
} else {
_update_transform();
}
}
void PathFollow2D::_update_transform() {
if (!path) {
return;
}
Ref<Curve2D> c = path->get_curve();
if (!c.is_valid()) {
return;
}
real_t path_length = c->get_baked_length();
if (path_length == 0) {
return;
}
if (rotates) {
Transform2D xform = c->sample_baked_with_rotation(progress, cubic);
xform.translate_local(h_offset, v_offset);
set_rotation(xform[0].angle());
set_position(xform[2]);
} else {
Vector2 pos = c->sample_baked(progress, cubic);
pos.x += h_offset;
pos.y += v_offset;
set_position(pos);
}
}
void PathFollow2D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_READY: {
if (Engine::get_singleton()->is_editor_hint()) {
update_timer = memnew(Timer);
update_timer->set_wait_time(0.2);
update_timer->set_one_shot(true);
update_timer->connect("timeout", callable_mp(this, &PathFollow2D::_update_transform));
add_child(update_timer, false, Node::INTERNAL_MODE_BACK);
}
} break;
case NOTIFICATION_ENTER_TREE: {
path = Object::cast_to<Path2D>(get_parent());
if (path) {
_update_transform();
}
} break;
case NOTIFICATION_EXIT_TREE: {
path = nullptr;
} break;
}
}
void PathFollow2D::set_cubic_interpolation_enabled(bool p_enabled) {
cubic = p_enabled;
}
bool PathFollow2D::is_cubic_interpolation_enabled() const {
return cubic;
}
void PathFollow2D::_validate_property(PropertyInfo &p_property) const {
if (p_property.name == "offset") {
real_t max = 10000.0;
if (path && path->get_curve().is_valid()) {
max = path->get_curve()->get_baked_length();
}
p_property.hint_string = "0," + rtos(max) + ",0.01,or_less,or_greater";
}
}
PackedStringArray PathFollow2D::get_configuration_warnings() const {
PackedStringArray warnings = Node2D::get_configuration_warnings();
if (is_visible_in_tree() && is_inside_tree()) {
if (!Object::cast_to<Path2D>(get_parent())) {
warnings.push_back(RTR("PathFollow2D only works when set as a child of a Path2D node."));
}
}
return warnings;
}
void PathFollow2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_progress", "progress"), &PathFollow2D::set_progress);
ClassDB::bind_method(D_METHOD("get_progress"), &PathFollow2D::get_progress);
ClassDB::bind_method(D_METHOD("set_h_offset", "h_offset"), &PathFollow2D::set_h_offset);
ClassDB::bind_method(D_METHOD("get_h_offset"), &PathFollow2D::get_h_offset);
ClassDB::bind_method(D_METHOD("set_v_offset", "v_offset"), &PathFollow2D::set_v_offset);
ClassDB::bind_method(D_METHOD("get_v_offset"), &PathFollow2D::get_v_offset);
ClassDB::bind_method(D_METHOD("set_progress_ratio", "ratio"), &PathFollow2D::set_progress_ratio);
ClassDB::bind_method(D_METHOD("get_progress_ratio"), &PathFollow2D::get_progress_ratio);
ClassDB::bind_method(D_METHOD("set_rotates", "enabled"), &PathFollow2D::set_rotation_enabled);
ClassDB::bind_method(D_METHOD("is_rotating"), &PathFollow2D::is_rotation_enabled);
ClassDB::bind_method(D_METHOD("set_cubic_interpolation", "enabled"), &PathFollow2D::set_cubic_interpolation_enabled);
ClassDB::bind_method(D_METHOD("get_cubic_interpolation"), &PathFollow2D::is_cubic_interpolation_enabled);
ClassDB::bind_method(D_METHOD("set_loop", "loop"), &PathFollow2D::set_loop);
ClassDB::bind_method(D_METHOD("has_loop"), &PathFollow2D::has_loop);
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "progress", PROPERTY_HINT_RANGE, "0,10000,0.01,or_less,or_greater,suffix:px"), "set_progress", "get_progress");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "progress_ratio", PROPERTY_HINT_RANGE, "0,1,0.0001,or_less,or_greater", PROPERTY_USAGE_EDITOR), "set_progress_ratio", "get_progress_ratio");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "h_offset"), "set_h_offset", "get_h_offset");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "v_offset"), "set_v_offset", "get_v_offset");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "rotates"), "set_rotates", "is_rotating");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "cubic_interp"), "set_cubic_interpolation", "get_cubic_interpolation");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "loop"), "set_loop", "has_loop");
}
void PathFollow2D::set_progress(real_t p_progress) {
ERR_FAIL_COND(!isfinite(p_progress));
progress = p_progress;
if (path) {
if (path->get_curve().is_valid()) {
real_t path_length = path->get_curve()->get_baked_length();
if (loop && path_length) {
progress = Math::fposmod(progress, path_length);
if (!Math::is_zero_approx(p_progress) && Math::is_zero_approx(progress)) {
progress = path_length;
}
} else {
progress = CLAMP(progress, 0, path_length);
}
}
_update_transform();
}
}
void PathFollow2D::set_h_offset(real_t p_h_offset) {
h_offset = p_h_offset;
if (path) {
_update_transform();
}
}
real_t PathFollow2D::get_h_offset() const {
return h_offset;
}
void PathFollow2D::set_v_offset(real_t p_v_offset) {
v_offset = p_v_offset;
if (path) {
_update_transform();
}
}
real_t PathFollow2D::get_v_offset() const {
return v_offset;
}
real_t PathFollow2D::get_progress() const {
return progress;
}
void PathFollow2D::set_progress_ratio(real_t p_ratio) {
ERR_FAIL_NULL_MSG(path, "Can only set progress ratio on a PathFollow2D that is the child of a Path2D which is itself part of the scene tree.");
ERR_FAIL_COND_MSG(path->get_curve().is_null(), "Can't set progress ratio on a PathFollow2D that does not have a Curve.");
ERR_FAIL_COND_MSG(!path->get_curve()->get_baked_length(), "Can't set progress ratio on a PathFollow2D that has a 0 length curve.");
set_progress(p_ratio * path->get_curve()->get_baked_length());
}
real_t PathFollow2D::get_progress_ratio() const {
if (path && path->get_curve().is_valid() && path->get_curve()->get_baked_length()) {
return get_progress() / path->get_curve()->get_baked_length();
} else {
return 0;
}
}
void PathFollow2D::set_rotation_enabled(bool p_enabled) {
rotates = p_enabled;
_update_transform();
}
bool PathFollow2D::is_rotation_enabled() const {
return rotates;
}
void PathFollow2D::set_loop(bool p_loop) {
loop = p_loop;
}
bool PathFollow2D::has_loop() const {
return loop;
}
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