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godot/editor/plugins/path_editor_plugin.cpp
Hein-Pieter van Braam cacced7e50 Convert Object::cast_to() to the static version 
Currently we rely on some undefined behavior when Object->cast_to() gets
called with a Null pointer. This used to work fine with GCC < 6 but
newer versions of GCC remove all codepaths in which the this pointer is
Null. However, the non-static cast_to() was supposed to be null safe.

This patch makes cast_to() Null safe and removes the now redundant Null
checks where they existed.

It is explained in this article: https://www.viva64.com/en/b/0226/
2017-08-24 23:08:24 +02:00

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/*************************************************************************/
/* path_editor_plugin.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 "path_editor_plugin.h"
#include "os/keyboard.h"
#include "scene/resources/curve.h"
#include "spatial_editor_plugin.h"
String PathSpatialGizmo::get_handle_name(int p_idx) const {
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return "";
if (p_idx < c->get_point_count()) {
return TTR("Curve Point #") + itos(p_idx);
}
p_idx = p_idx - c->get_point_count() + 1;
int idx = p_idx / 2;
int t = p_idx % 2;
String n = TTR("Curve Point #") + itos(idx);
if (t == 0)
n += " In";
else
n += " Out";
return n;
}
Variant PathSpatialGizmo::get_handle_value(int p_idx) const {
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return Variant();
if (p_idx < c->get_point_count()) {
original = c->get_point_pos(p_idx);
return original;
}
p_idx = p_idx - c->get_point_count() + 1;
int idx = p_idx / 2;
int t = p_idx % 2;
Vector3 ofs;
if (t == 0)
ofs = c->get_point_in(idx);
else
ofs = c->get_point_out(idx);
original = ofs + c->get_point_pos(idx);
return ofs;
}
void PathSpatialGizmo::set_handle(int p_idx, Camera *p_camera, const Point2 &p_point) {
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return;
Transform gt = path->get_global_transform();
Transform gi = gt.affine_inverse();
Vector3 ray_from = p_camera->project_ray_origin(p_point);
Vector3 ray_dir = p_camera->project_ray_normal(p_point);
if (p_idx < c->get_point_count()) {
Plane p(gt.xform(original), p_camera->get_transform().basis.get_axis(2));
Vector3 inters;
if (p.intersects_ray(ray_from, ray_dir, &inters)) {
if (SpatialEditor::get_singleton()->is_snap_enabled()) {
float snap = SpatialEditor::get_singleton()->get_translate_snap();
inters.snap(Vector3(snap, snap, snap));
}
Vector3 local = gi.xform(inters);
c->set_point_pos(p_idx, local);
}
return;
}
p_idx = p_idx - c->get_point_count() + 1;
int idx = p_idx / 2;
int t = p_idx % 2;
Vector3 base = c->get_point_pos(idx);
Plane p(gt.xform(original), p_camera->get_transform().basis.get_axis(2));
Vector3 inters;
if (p.intersects_ray(ray_from, ray_dir, &inters)) {
Vector3 local = gi.xform(inters) - base;
if (t == 0) {
c->set_point_in(idx, local);
} else {
c->set_point_out(idx, local);
}
}
}
void PathSpatialGizmo::commit_handle(int p_idx, const Variant &p_restore, bool p_cancel) {
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return;
UndoRedo *ur = SpatialEditor::get_singleton()->get_undo_redo();
if (p_idx < c->get_point_count()) {
if (p_cancel) {
c->set_point_pos(p_idx, p_restore);
return;
}
ur->create_action(TTR("Set Curve Point Pos"));
ur->add_do_method(c.ptr(), "set_point_pos", p_idx, c->get_point_pos(p_idx));
ur->add_undo_method(c.ptr(), "set_point_pos", p_idx, p_restore);
ur->commit_action();
return;
}
p_idx = p_idx - c->get_point_count() + 1;
int idx = p_idx / 2;
int t = p_idx % 2;
Vector3 ofs;
if (p_cancel) {
return;
}
if (t == 0) {
if (p_cancel) {
c->set_point_in(p_idx, p_restore);
return;
}
ur->create_action(TTR("Set Curve In Pos"));
ur->add_do_method(c.ptr(), "set_point_in", idx, c->get_point_in(idx));
ur->add_undo_method(c.ptr(), "set_point_in", idx, p_restore);
ur->commit_action();
} else {
if (p_cancel) {
c->set_point_out(idx, p_restore);
return;
}
ur->create_action(TTR("Set Curve Out Pos"));
ur->add_do_method(c.ptr(), "set_point_out", idx, c->get_point_out(idx));
ur->add_undo_method(c.ptr(), "set_point_out", idx, p_restore);
ur->commit_action();
}
}
void PathSpatialGizmo::redraw() {
clear();
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return;
PoolVector<Vector3> v3a = c->tessellate();
//PoolVector<Vector3> v3a=c->get_baked_points();
int v3s = v3a.size();
if (v3s == 0)
return;
Vector<Vector3> v3p;
PoolVector<Vector3>::Read r = v3a.read();
// BUG: the following won't work when v3s, avoid drawing as a temporary workaround.
for (int i = 0; i < v3s - 1; i++) {
v3p.push_back(r[i]);
v3p.push_back(r[i + 1]);
//v3p.push_back(r[i]);
//v3p.push_back(r[i]+Vector3(0,0.2,0));
}
if (v3p.size() > 1) {
add_lines(v3p, PathEditorPlugin::singleton->path_material);
add_collision_segments(v3p);
}
if (PathEditorPlugin::singleton->get_edited_path() == path) {
v3p.clear();
Vector<Vector3> handles;
Vector<Vector3> sec_handles;
for (int i = 0; i < c->get_point_count(); i++) {
Vector3 p = c->get_point_pos(i);
handles.push_back(p);
if (i > 0) {
v3p.push_back(p);
v3p.push_back(p + c->get_point_in(i));
sec_handles.push_back(p + c->get_point_in(i));
}
if (i < c->get_point_count() - 1) {
v3p.push_back(p);
v3p.push_back(p + c->get_point_out(i));
sec_handles.push_back(p + c->get_point_out(i));
}
}
if (v3p.size() > 1) {
add_lines(v3p, PathEditorPlugin::singleton->path_thin_material);
}
if (handles.size()) {
add_handles(handles);
}
if (sec_handles.size()) {
add_handles(sec_handles, false, true);
}
}
}
PathSpatialGizmo::PathSpatialGizmo(Path *p_path) {
path = p_path;
set_spatial_node(p_path);
}
Ref<SpatialEditorGizmo> PathEditorPlugin::create_spatial_gizmo(Spatial *p_spatial) {
if (Object::cast_to<Path>(p_spatial)) {
return memnew(PathSpatialGizmo(Object::cast_to<Path>(p_spatial)));
}
return Ref<SpatialEditorGizmo>();
}
bool PathEditorPlugin::forward_spatial_gui_input(Camera *p_camera, const Ref<InputEvent> &p_event) {
if (!path)
return false;
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return false;
Transform gt = path->get_global_transform();
Transform it = gt.affine_inverse();
static const int click_dist = 10; //should make global
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid()) {
Point2 mbpos(mb->get_position().x, mb->get_position().y);
if (mb->is_pressed() && mb->get_button_index() == BUTTON_LEFT && (curve_create->is_pressed() || (curve_edit->is_pressed() && mb->get_control()))) {
//click into curve, break it down
PoolVector<Vector3> v3a = c->tessellate();
int idx = 0;
int rc = v3a.size();
int closest_seg = -1;
Vector3 closest_seg_point;
float closest_d = 1e20;
if (rc >= 2) {
PoolVector<Vector3>::Read r = v3a.read();
if (p_camera->unproject_position(gt.xform(c->get_point_pos(0))).distance_to(mbpos) < click_dist)
return false; //nope, existing
for (int i = 0; i < c->get_point_count() - 1; i++) {
//find the offset and point index of the place to break up
int j = idx;
if (p_camera->unproject_position(gt.xform(c->get_point_pos(i + 1))).distance_to(mbpos) < click_dist)
return false; //nope, existing
while (j < rc && c->get_point_pos(i + 1) != r[j]) {
Vector3 from = r[j];
Vector3 to = r[j + 1];
real_t cdist = from.distance_to(to);
from = gt.xform(from);
to = gt.xform(to);
if (cdist > 0) {
Vector2 s[2];
s[0] = p_camera->unproject_position(from);
s[1] = p_camera->unproject_position(to);
Vector2 inters = Geometry::get_closest_point_to_segment_2d(mbpos, s);
float d = inters.distance_to(mbpos);
if (d < 10 && d < closest_d) {
closest_d = d;
closest_seg = i;
Vector3 ray_from = p_camera->project_ray_origin(mbpos);
Vector3 ray_dir = p_camera->project_ray_normal(mbpos);
Vector3 ra, rb;
Geometry::get_closest_points_between_segments(ray_from, ray_from + ray_dir * 4096, from, to, ra, rb);
closest_seg_point = it.xform(rb);
}
}
j++;
}
if (idx == j)
idx++; //force next
else
idx = j; //swap
if (j == rc)
break;
}
}
UndoRedo *ur = editor->get_undo_redo();
if (closest_seg != -1) {
//subdivide
ur->create_action(TTR("Split Path"));
ur->add_do_method(c.ptr(), "add_point", closest_seg_point, Vector3(), Vector3(), closest_seg + 1);
ur->add_undo_method(c.ptr(), "remove_point", closest_seg + 1);
ur->commit_action();
return true;
} else {
Vector3 org;
if (c->get_point_count() == 0)
org = path->get_transform().get_origin();
else
org = gt.xform(c->get_point_pos(c->get_point_count() - 1));
Plane p(org, p_camera->get_transform().basis.get_axis(2));
Vector3 ray_from = p_camera->project_ray_origin(mbpos);
Vector3 ray_dir = p_camera->project_ray_normal(mbpos);
Vector3 inters;
if (p.intersects_ray(ray_from, ray_dir, &inters)) {
ur->create_action(TTR("Add Point to Curve"));
ur->add_do_method(c.ptr(), "add_point", it.xform(inters), Vector3(), Vector3(), -1);
ur->add_undo_method(c.ptr(), "remove_point", c->get_point_count());
ur->commit_action();
return true;
}
//add new at pos
}
} else if (mb->is_pressed() && ((mb->get_button_index() == BUTTON_LEFT && curve_del->is_pressed()) || (mb->get_button_index() == BUTTON_RIGHT && curve_edit->is_pressed()))) {
for (int i = 0; i < c->get_point_count(); i++) {
real_t dist_to_p = p_camera->unproject_position(gt.xform(c->get_point_pos(i))).distance_to(mbpos);
real_t dist_to_p_out = p_camera->unproject_position(gt.xform(c->get_point_pos(i) + c->get_point_out(i))).distance_to(mbpos);
real_t dist_to_p_in = p_camera->unproject_position(gt.xform(c->get_point_pos(i) + c->get_point_in(i))).distance_to(mbpos);
// Find the offset and point index of the place to break up.
// Also check for the control points.
if (dist_to_p < click_dist) {
UndoRedo *ur = editor->get_undo_redo();
ur->create_action(TTR("Remove Path Point"));
ur->add_do_method(c.ptr(), "remove_point", i);
ur->add_undo_method(c.ptr(), "add_point", c->get_point_pos(i), c->get_point_in(i), c->get_point_out(i), i);
ur->commit_action();
return true;
} else if (dist_to_p_out < click_dist) {
UndoRedo *ur = editor->get_undo_redo();
ur->create_action(TTR("Remove Out-Control Point"));
ur->add_do_method(c.ptr(), "set_point_out", i, Vector3());
ur->add_undo_method(c.ptr(), "set_point_out", i, c->get_point_out(i));
ur->commit_action();
return true;
} else if (dist_to_p_in < click_dist) {
UndoRedo *ur = editor->get_undo_redo();
ur->create_action(TTR("Remove In-Control Point"));
ur->add_do_method(c.ptr(), "set_point_in", i, Vector3());
ur->add_undo_method(c.ptr(), "set_point_in", i, c->get_point_in(i));
ur->commit_action();
return true;
}
}
}
}
return false;
}
void PathEditorPlugin::edit(Object *p_object) {
if (p_object) {
path = Object::cast_to<Path>(p_object);
if (path) {
if (path->get_curve().is_valid()) {
path->get_curve()->emit_signal("changed");
}
}
} else {
Path *pre = path;
path = NULL;
if (pre) {
pre->get_curve()->emit_signal("changed");
}
}
//collision_polygon_editor->edit(Object::cast_to<Node>(p_object));
}
bool PathEditorPlugin::handles(Object *p_object) const {
return p_object->is_class("Path");
}
void PathEditorPlugin::make_visible(bool p_visible) {
if (p_visible) {
curve_create->show();
curve_edit->show();
curve_del->show();
curve_close->show();
sep->show();
} else {
curve_create->hide();
curve_edit->hide();
curve_del->hide();
curve_close->hide();
sep->hide();
{
Path *pre = path;
path = NULL;
if (pre && pre->get_curve().is_valid()) {
pre->get_curve()->emit_signal("changed");
}
}
}
}
void PathEditorPlugin::_mode_changed(int p_idx) {
curve_create->set_pressed(p_idx == 0);
curve_edit->set_pressed(p_idx == 1);
curve_del->set_pressed(p_idx == 2);
}
void PathEditorPlugin::_close_curve() {
Ref<Curve3D> c = path->get_curve();
if (c.is_null())
return;
if (c->get_point_count() < 2)
return;
c->add_point(c->get_point_pos(0), c->get_point_in(0), c->get_point_out(0));
}
void PathEditorPlugin::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE) {
curve_create->connect("pressed", this, "_mode_changed", make_binds(0));
curve_edit->connect("pressed", this, "_mode_changed", make_binds(1));
curve_del->connect("pressed", this, "_mode_changed", make_binds(2));
curve_close->connect("pressed", this, "_close_curve");
}
}
void PathEditorPlugin::_bind_methods() {
ClassDB::bind_method(D_METHOD("_mode_changed"), &PathEditorPlugin::_mode_changed);
ClassDB::bind_method(D_METHOD("_close_curve"), &PathEditorPlugin::_close_curve);
}
PathEditorPlugin *PathEditorPlugin::singleton = NULL;
PathEditorPlugin::PathEditorPlugin(EditorNode *p_node) {
path = NULL;
editor = p_node;
singleton = this;
path_material = Ref<SpatialMaterial>(memnew(SpatialMaterial));
path_material->set_albedo(Color(0.5, 0.5, 1.0, 0.8));
path_material->set_feature(SpatialMaterial::FEATURE_TRANSPARENT, true);
path_material->set_line_width(3);
path_material->set_cull_mode(SpatialMaterial::CULL_DISABLED);
path_material->set_flag(SpatialMaterial::FLAG_UNSHADED, true);
path_thin_material = Ref<SpatialMaterial>(memnew(SpatialMaterial));
path_thin_material->set_albedo(Color(0.5, 0.5, 1.0, 0.4));
path_thin_material->set_feature(SpatialMaterial::FEATURE_TRANSPARENT, true);
path_thin_material->set_line_width(1);
path_thin_material->set_cull_mode(SpatialMaterial::CULL_DISABLED);
path_thin_material->set_flag(SpatialMaterial::FLAG_UNSHADED, true);
//SpatialEditor::get_singleton()->add_gizmo_plugin(this);
sep = memnew(VSeparator);
sep->hide();
SpatialEditor::get_singleton()->add_control_to_menu_panel(sep);
curve_edit = memnew(ToolButton);
curve_edit->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveEdit", "EditorIcons"));
curve_edit->set_toggle_mode(true);
curve_edit->hide();
curve_edit->set_focus_mode(Control::FOCUS_NONE);
curve_edit->set_tooltip(TTR("Select Points") + "\n" + TTR("Shift+Drag: Select Control Points") + "\n" + keycode_get_string(KEY_MASK_CMD) + TTR("Click: Add Point") + "\n" + TTR("Right Click: Delete Point"));
SpatialEditor::get_singleton()->add_control_to_menu_panel(curve_edit);
curve_create = memnew(ToolButton);
curve_create->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveCreate", "EditorIcons"));
curve_create->set_toggle_mode(true);
curve_create->hide();
curve_create->set_focus_mode(Control::FOCUS_NONE);
curve_create->set_tooltip(TTR("Add Point (in empty space)") + "\n" + TTR("Split Segment (in curve)"));
SpatialEditor::get_singleton()->add_control_to_menu_panel(curve_create);
curve_del = memnew(ToolButton);
curve_del->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveDelete", "EditorIcons"));
curve_del->set_toggle_mode(true);
curve_del->hide();
curve_del->set_focus_mode(Control::FOCUS_NONE);
curve_del->set_tooltip(TTR("Delete Point"));
SpatialEditor::get_singleton()->add_control_to_menu_panel(curve_del);
curve_close = memnew(ToolButton);
curve_close->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveClose", "EditorIcons"));
curve_close->hide();
curve_close->set_focus_mode(Control::FOCUS_NONE);
curve_close->set_tooltip(TTR("Close Curve"));
SpatialEditor::get_singleton()->add_control_to_menu_panel(curve_close);
curve_edit->set_pressed(true);
/*
collision_polygon_editor = memnew( PathEditor(p_node) );
editor->get_viewport()->add_child(collision_polygon_editor);
collision_polygon_editor->set_margin(MARGIN_LEFT,200);
collision_polygon_editor->set_margin(MARGIN_RIGHT,230);
collision_polygon_editor->set_margin(MARGIN_TOP,0);
collision_polygon_editor->set_margin(MARGIN_BOTTOM,10);
collision_polygon_editor->hide();
*/
}
PathEditorPlugin::~PathEditorPlugin() {
}
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