ea9dff87ae
When a PathFollow is badly configured it's possible to have code that
call get_progress_ratio just after set_progress_ratio does not return
the value just set, which may be confusing for developer (ie that
myPathFollow2D.set_progress_ratio(0.5)
myPathFollow2D.get_progress_ratio()
does not return 0.5)
This commit makes ensures the developer has useful error messages in
such case, to make it easier to troubleshot it.
410 lines
12 KiB
C++
410 lines
12 KiB
C++
/**************************************************************************/
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/* path_2d.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "path_2d.h"
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#include "core/math/geometry_2d.h"
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#include "scene/main/timer.h"
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#ifdef TOOLS_ENABLED
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#include "editor/themes/editor_scale.h"
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#endif
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#ifdef TOOLS_ENABLED
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Rect2 Path2D::_edit_get_rect() const {
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if (!curve.is_valid() || curve->get_point_count() == 0) {
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return Rect2(0, 0, 0, 0);
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}
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Rect2 aabb = Rect2(curve->get_point_position(0), Vector2(0, 0));
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for (int i = 0; i < curve->get_point_count(); i++) {
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for (int j = 0; j <= 8; j++) {
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real_t frac = j / 8.0;
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Vector2 p = curve->sample(i, frac);
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aabb.expand_to(p);
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}
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}
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return aabb;
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}
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bool Path2D::_edit_use_rect() const {
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return curve.is_valid() && curve->get_point_count() != 0;
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}
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bool Path2D::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const {
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if (curve.is_null()) {
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return false;
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}
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for (int i = 0; i < curve->get_point_count(); i++) {
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Vector2 s[2];
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s[0] = curve->get_point_position(i);
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for (int j = 1; j <= 8; j++) {
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real_t frac = j / 8.0;
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s[1] = curve->sample(i, frac);
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Vector2 p = Geometry2D::get_closest_point_to_segment(p_point, s);
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if (p.distance_to(p_point) <= p_tolerance) {
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return true;
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}
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s[0] = s[1];
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}
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}
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return false;
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}
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#endif
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void Path2D::_notification(int p_what) {
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switch (p_what) {
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// Draw the curve if path debugging is enabled.
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case NOTIFICATION_DRAW: {
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if (!curve.is_valid()) {
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break;
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}
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if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_paths_hint()) {
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return;
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}
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if (curve->get_point_count() < 2) {
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return;
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}
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#ifdef TOOLS_ENABLED
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const real_t line_width = get_tree()->get_debug_paths_width() * EDSCALE;
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#else
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const real_t line_width = get_tree()->get_debug_paths_width();
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#endif
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real_t interval = 10;
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const real_t length = curve->get_baked_length();
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if (length > CMP_EPSILON) {
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const int sample_count = int(length / interval) + 2;
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interval = length / (sample_count - 1); // Recalculate real interval length.
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Vector<Transform2D> frames;
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frames.resize(sample_count);
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{
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Transform2D *w = frames.ptrw();
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for (int i = 0; i < sample_count; i++) {
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w[i] = curve->sample_baked_with_rotation(i * interval, false);
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}
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}
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const Transform2D *r = frames.ptr();
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// Draw curve segments
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{
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PackedVector2Array v2p;
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v2p.resize(sample_count);
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Vector2 *w = v2p.ptrw();
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for (int i = 0; i < sample_count; i++) {
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w[i] = r[i].get_origin();
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}
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draw_polyline(v2p, get_tree()->get_debug_paths_color(), line_width, false);
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}
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// Draw fish bones
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{
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PackedVector2Array v2p;
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v2p.resize(3);
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Vector2 *w = v2p.ptrw();
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for (int i = 0; i < sample_count; i++) {
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const Vector2 p = r[i].get_origin();
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const Vector2 side = r[i].columns[1];
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const Vector2 forward = r[i].columns[0];
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// Fish Bone.
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w[0] = p + (side - forward) * 5;
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w[1] = p;
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w[2] = p + (-side - forward) * 5;
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draw_polyline(v2p, get_tree()->get_debug_paths_color(), line_width * 0.5, false);
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}
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}
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}
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} break;
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}
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}
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void Path2D::_curve_changed() {
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if (!is_inside_tree()) {
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return;
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}
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if (!Engine::get_singleton()->is_editor_hint() && !get_tree()->is_debugging_paths_hint()) {
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return;
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}
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queue_redraw();
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for (int i = 0; i < get_child_count(); i++) {
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PathFollow2D *follow = Object::cast_to<PathFollow2D>(get_child(i));
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if (follow) {
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follow->path_changed();
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}
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}
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}
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void Path2D::set_curve(const Ref<Curve2D> &p_curve) {
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if (curve.is_valid()) {
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curve->disconnect_changed(callable_mp(this, &Path2D::_curve_changed));
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}
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curve = p_curve;
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if (curve.is_valid()) {
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curve->connect_changed(callable_mp(this, &Path2D::_curve_changed));
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}
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_curve_changed();
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}
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Ref<Curve2D> Path2D::get_curve() const {
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return curve;
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}
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void Path2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_curve", "curve"), &Path2D::set_curve);
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ClassDB::bind_method(D_METHOD("get_curve"), &Path2D::get_curve);
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "curve", PROPERTY_HINT_RESOURCE_TYPE, "Curve2D", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_EDITOR_INSTANTIATE_OBJECT), "set_curve", "get_curve");
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}
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/////////////////////////////////////////////////////////////////////////////////
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void PathFollow2D::path_changed() {
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if (update_timer && !update_timer->is_stopped()) {
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update_timer->start();
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} else {
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_update_transform();
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}
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}
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void PathFollow2D::_update_transform() {
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if (!path) {
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return;
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}
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Ref<Curve2D> c = path->get_curve();
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if (!c.is_valid()) {
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return;
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}
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real_t path_length = c->get_baked_length();
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if (path_length == 0) {
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return;
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}
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if (rotates) {
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Transform2D xform = c->sample_baked_with_rotation(progress, cubic);
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xform.translate_local(h_offset, v_offset);
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set_rotation(xform[0].angle());
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set_position(xform[2]);
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} else {
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Vector2 pos = c->sample_baked(progress, cubic);
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pos.x += h_offset;
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pos.y += v_offset;
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set_position(pos);
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}
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}
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void PathFollow2D::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_READY: {
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if (Engine::get_singleton()->is_editor_hint()) {
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update_timer = memnew(Timer);
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update_timer->set_wait_time(0.2);
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update_timer->set_one_shot(true);
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update_timer->connect("timeout", callable_mp(this, &PathFollow2D::_update_transform));
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add_child(update_timer, false, Node::INTERNAL_MODE_BACK);
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}
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} break;
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case NOTIFICATION_ENTER_TREE: {
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path = Object::cast_to<Path2D>(get_parent());
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if (path) {
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_update_transform();
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}
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} break;
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case NOTIFICATION_EXIT_TREE: {
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path = nullptr;
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} break;
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}
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}
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void PathFollow2D::set_cubic_interpolation_enabled(bool p_enabled) {
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cubic = p_enabled;
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}
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bool PathFollow2D::is_cubic_interpolation_enabled() const {
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return cubic;
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}
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void PathFollow2D::_validate_property(PropertyInfo &p_property) const {
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if (p_property.name == "offset") {
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real_t max = 10000.0;
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if (path && path->get_curve().is_valid()) {
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max = path->get_curve()->get_baked_length();
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}
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p_property.hint_string = "0," + rtos(max) + ",0.01,or_less,or_greater";
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}
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}
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PackedStringArray PathFollow2D::get_configuration_warnings() const {
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PackedStringArray warnings = Node::get_configuration_warnings();
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if (is_visible_in_tree() && is_inside_tree()) {
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if (!Object::cast_to<Path2D>(get_parent())) {
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warnings.push_back(RTR("PathFollow2D only works when set as a child of a Path2D node."));
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}
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}
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return warnings;
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}
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void PathFollow2D::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_progress", "progress"), &PathFollow2D::set_progress);
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ClassDB::bind_method(D_METHOD("get_progress"), &PathFollow2D::get_progress);
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ClassDB::bind_method(D_METHOD("set_h_offset", "h_offset"), &PathFollow2D::set_h_offset);
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ClassDB::bind_method(D_METHOD("get_h_offset"), &PathFollow2D::get_h_offset);
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ClassDB::bind_method(D_METHOD("set_v_offset", "v_offset"), &PathFollow2D::set_v_offset);
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ClassDB::bind_method(D_METHOD("get_v_offset"), &PathFollow2D::get_v_offset);
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ClassDB::bind_method(D_METHOD("set_progress_ratio", "ratio"), &PathFollow2D::set_progress_ratio);
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ClassDB::bind_method(D_METHOD("get_progress_ratio"), &PathFollow2D::get_progress_ratio);
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ClassDB::bind_method(D_METHOD("set_rotates", "enabled"), &PathFollow2D::set_rotation_enabled);
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ClassDB::bind_method(D_METHOD("is_rotating"), &PathFollow2D::is_rotation_enabled);
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ClassDB::bind_method(D_METHOD("set_cubic_interpolation", "enabled"), &PathFollow2D::set_cubic_interpolation_enabled);
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ClassDB::bind_method(D_METHOD("get_cubic_interpolation"), &PathFollow2D::is_cubic_interpolation_enabled);
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ClassDB::bind_method(D_METHOD("set_loop", "loop"), &PathFollow2D::set_loop);
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ClassDB::bind_method(D_METHOD("has_loop"), &PathFollow2D::has_loop);
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "progress", PROPERTY_HINT_RANGE, "0,10000,0.01,or_less,or_greater,suffix:px"), "set_progress", "get_progress");
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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");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "h_offset"), "set_h_offset", "get_h_offset");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "v_offset"), "set_v_offset", "get_v_offset");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "rotates"), "set_rotates", "is_rotating");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "cubic_interp"), "set_cubic_interpolation", "get_cubic_interpolation");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "loop"), "set_loop", "has_loop");
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}
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void PathFollow2D::set_progress(real_t p_progress) {
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ERR_FAIL_COND(!isfinite(p_progress));
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progress = p_progress;
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if (path) {
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if (path->get_curve().is_valid()) {
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real_t path_length = path->get_curve()->get_baked_length();
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if (loop && path_length) {
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progress = Math::fposmod(progress, path_length);
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if (!Math::is_zero_approx(p_progress) && Math::is_zero_approx(progress)) {
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progress = path_length;
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}
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} else {
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progress = CLAMP(progress, 0, path_length);
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}
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}
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_update_transform();
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}
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}
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void PathFollow2D::set_h_offset(real_t p_h_offset) {
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h_offset = p_h_offset;
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if (path) {
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_update_transform();
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}
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}
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real_t PathFollow2D::get_h_offset() const {
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return h_offset;
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}
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void PathFollow2D::set_v_offset(real_t p_v_offset) {
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v_offset = p_v_offset;
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if (path) {
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_update_transform();
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}
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}
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real_t PathFollow2D::get_v_offset() const {
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return v_offset;
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}
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real_t PathFollow2D::get_progress() const {
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return progress;
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}
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void PathFollow2D::set_progress_ratio(real_t p_ratio) {
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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.");
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ERR_FAIL_COND_MSG(path->get_curve().is_null(), "Can't set progress ratio on a PathFollow2D that does not have a Curve.");
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ERR_FAIL_COND_MSG(!path->get_curve()->get_baked_length(), "Can't set progress ratio on a PathFollow2D that has a 0 length curve.");
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set_progress(p_ratio * path->get_curve()->get_baked_length());
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}
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real_t PathFollow2D::get_progress_ratio() const {
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if (path && path->get_curve().is_valid() && path->get_curve()->get_baked_length()) {
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return get_progress() / path->get_curve()->get_baked_length();
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} else {
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return 0;
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}
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}
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void PathFollow2D::set_rotation_enabled(bool p_enabled) {
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rotates = p_enabled;
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_update_transform();
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}
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bool PathFollow2D::is_rotation_enabled() const {
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return rotates;
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}
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void PathFollow2D::set_loop(bool p_loop) {
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loop = p_loop;
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}
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bool PathFollow2D::has_loop() const {
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return loop;
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}
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