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godot/editor/plugins/abstract_polygon_2d_editor.cpp
Bernhard Liebl 89f7032c2e Fix drawing order of polygon 2d editor handles
2017-11-13 18:49:06 +01:00

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/*************************************************************************/
/* abstract_polygon_2d_editor.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://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 "abstract_polygon_2d_editor.h"
#include "canvas_item_editor_plugin.h"
#include "core/os/keyboard.h"
AbstractPolygon2DEditor::Vertex::Vertex()
: polygon(-1), vertex(-1) {
// invalid vertex
}
AbstractPolygon2DEditor::Vertex::Vertex(int p_vertex)
: polygon(-1), vertex(p_vertex) {
// vertex p_vertex of current wip polygon
}
AbstractPolygon2DEditor::Vertex::Vertex(int p_polygon, int p_vertex)
: polygon(p_polygon), vertex(p_vertex) {
// vertex p_vertex of polygon p_polygon
}
bool AbstractPolygon2DEditor::Vertex::operator==(const AbstractPolygon2DEditor::Vertex &p_vertex) const {
return polygon == p_vertex.polygon && vertex == p_vertex.vertex;
}
bool AbstractPolygon2DEditor::Vertex::operator!=(const AbstractPolygon2DEditor::Vertex &p_vertex) const {
return !(*this == p_vertex);
}
bool AbstractPolygon2DEditor::Vertex::valid() const {
return vertex >= 0;
}
AbstractPolygon2DEditor::PosVertex::PosVertex() {
// invalid vertex
}
AbstractPolygon2DEditor::PosVertex::PosVertex(const Vertex &p_vertex, const Vector2 &p_pos)
: Vertex(p_vertex.polygon, p_vertex.vertex), pos(p_pos) {
}
AbstractPolygon2DEditor::PosVertex::PosVertex(int p_polygon, int p_vertex, const Vector2 &p_pos)
: Vertex(p_polygon, p_vertex), pos(p_pos) {
}
bool AbstractPolygon2DEditor::_is_empty() const {
if (!_get_node())
return true;
const int n = _get_polygon_count();
for (int i = 0; i < n; i++) {
Vector<Vector2> vertices = _get_polygon(i);
if (vertices.size() != 0)
return false;
}
return true;
}
bool AbstractPolygon2DEditor::_is_line() const {
return false;
}
int AbstractPolygon2DEditor::_get_polygon_count() const {
return 1;
}
Variant AbstractPolygon2DEditor::_get_polygon(int p_idx) const {
return _get_node()->get("polygon");
}
void AbstractPolygon2DEditor::_set_polygon(int p_idx, const Variant &p_polygon) const {
_get_node()->set("polygon", p_polygon);
}
void AbstractPolygon2DEditor::_action_set_polygon(int p_idx, const Variant &p_previous, const Variant &p_polygon) {
Node2D *node = _get_node();
undo_redo->add_do_method(node, "set_polygon", p_polygon);
undo_redo->add_undo_method(node, "set_polygon", p_previous);
}
Vector2 AbstractPolygon2DEditor::_get_offset(int p_idx) const {
return Vector2(0, 0);
}
void AbstractPolygon2DEditor::_commit_action() {
undo_redo->add_do_method(canvas_item_editor->get_viewport_control(), "update");
undo_redo->add_undo_method(canvas_item_editor->get_viewport_control(), "update");
undo_redo->commit_action();
}
void AbstractPolygon2DEditor::_action_add_polygon(const Variant &p_polygon) {
_action_set_polygon(0, p_polygon);
}
void AbstractPolygon2DEditor::_action_remove_polygon(int p_idx) {
_action_set_polygon(p_idx, _get_polygon(p_idx), PoolVector<Vector2>());
}
void AbstractPolygon2DEditor::_action_set_polygon(int p_idx, const Variant &p_polygon) {
_action_set_polygon(p_idx, _get_polygon(p_idx), p_polygon);
}
bool AbstractPolygon2DEditor::_has_resource() const {
return true;
}
void AbstractPolygon2DEditor::_create_resource() {
}
void AbstractPolygon2DEditor::_menu_option(int p_option) {
switch (p_option) {
case MODE_CREATE: {
mode = MODE_CREATE;
button_create->set_pressed(true);
button_edit->set_pressed(false);
button_delete->set_pressed(false);
} break;
case MODE_EDIT: {
wip_active = false;
mode = MODE_EDIT;
button_create->set_pressed(false);
button_edit->set_pressed(true);
button_delete->set_pressed(false);
} break;
case MODE_DELETE: {
wip_active = false;
mode = MODE_DELETE;
button_create->set_pressed(false);
button_edit->set_pressed(false);
button_delete->set_pressed(true);
} break;
}
}
void AbstractPolygon2DEditor::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_READY: {
button_create->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveCreate", "EditorIcons"));
button_edit->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveEdit", "EditorIcons"));
button_delete->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("CurveDelete", "EditorIcons"));
button_edit->set_pressed(true);
get_tree()->connect("node_removed", this, "_node_removed");
create_resource->connect("confirmed", this, "_create_resource");
} break;
case NOTIFICATION_PHYSICS_PROCESS: {
} break;
}
}
void AbstractPolygon2DEditor::_node_removed(Node *p_node) {
if (p_node == _get_node()) {
edit(NULL);
hide();
canvas_item_editor->get_viewport_control()->update();
}
}
void AbstractPolygon2DEditor::_wip_changed() {
if (wip_active && _is_line()) {
_set_polygon(0, wip);
}
}
void AbstractPolygon2DEditor::_wip_close() {
if (_is_line()) {
_set_polygon(0, wip);
} else if (wip.size() >= 3) {
undo_redo->create_action(TTR("Create Poly"));
_action_add_polygon(wip);
_commit_action();
} else {
return;
}
mode = MODE_EDIT;
button_edit->set_pressed(true);
button_create->set_pressed(false);
button_delete->set_pressed(false);
wip.clear();
wip_active = false;
edited_point = PosVertex();
hover_point = Vertex();
selected_point = Vertex();
}
bool AbstractPolygon2DEditor::forward_gui_input(const Ref<InputEvent> &p_event) {
if (!_get_node())
return false;
Ref<InputEventMouseButton> mb = p_event;
if (!_has_resource()) {
if (mb.is_valid() && mb->get_button_index() == 1 && mb->is_pressed()) {
create_resource->set_text(String("No polygon resource on this node.\nCreate and assign one?"));
create_resource->popup_centered_minsize();
}
return (mb.is_valid() && mb->get_button_index() == 1);
}
if (mb.is_valid()) {
Transform2D xform = canvas_item_editor->get_canvas_transform() * _get_node()->get_global_transform();
Vector2 gpoint = mb->get_position();
Vector2 cpoint = _get_node()->get_global_transform().affine_inverse().xform(canvas_item_editor->snap_point(canvas_item_editor->get_canvas_transform().affine_inverse().xform(mb->get_position())));
if (mode == MODE_CREATE) {
if (mb->get_button_index() == BUTTON_LEFT && mb->is_pressed()) {
if (!wip_active) {
wip.clear();
wip.push_back(cpoint);
wip_active = true;
_wip_changed();
edited_point = PosVertex(-1, 1, cpoint);
canvas_item_editor->get_viewport_control()->update();
hover_point = Vertex();
selected_point = Vertex(0);
edge_point = PosVertex();
return true;
} else {
const real_t grab_threshold = EDITOR_DEF("editors/poly_editor/point_grab_radius", 8);
if (!_is_line() && wip.size() > 1 && xform.xform(wip[0]).distance_to(gpoint) < grab_threshold) {
//wip closed
_wip_close();
return true;
} else {
//add wip point
wip.push_back(cpoint);
_wip_changed();
edited_point = PosVertex(-1, wip.size(), cpoint);
selected_point = Vertex(wip.size() - 1);
canvas_item_editor->get_viewport_control()->update();
return true;
}
}
} else if (mb->get_button_index() == BUTTON_RIGHT && mb->is_pressed() && wip_active) {
_wip_close();
}
} else if (mode == MODE_EDIT) {
if (mb->get_button_index() == BUTTON_LEFT) {
if (mb->is_pressed()) {
const PosVertex insert = closest_edge_point(gpoint);
if (insert.valid()) {
Vector<Vector2> vertices = _get_polygon(insert.polygon);
if (vertices.size() < 3) {
vertices.push_back(cpoint);
undo_redo->create_action(TTR("Edit Poly"));
selected_point = Vertex(insert.polygon, vertices.size());
_action_set_polygon(insert.polygon, vertices);
_commit_action();
return true;
} else {
Vector<Vector2> vertices = _get_polygon(insert.polygon);
pre_move_edit = vertices;
edited_point = PosVertex(insert.polygon, insert.vertex + 1, xform.affine_inverse().xform(insert.pos));
vertices.insert(edited_point.vertex, edited_point.pos);
selected_point = edited_point;
edge_point = PosVertex();
undo_redo->create_action(TTR("Insert Point"));
_action_set_polygon(insert.polygon, vertices);
_commit_action();
return true;
}
} else {
//look for points to move
const PosVertex closest = closest_point(gpoint);
if (closest.valid()) {
pre_move_edit = _get_polygon(closest.polygon);
edited_point = PosVertex(closest, xform.affine_inverse().xform(closest.pos));
selected_point = closest;
edge_point = PosVertex();
canvas_item_editor->get_viewport_control()->update();
return true;
} else {
selected_point = Vertex();
}
}
} else {
if (edited_point.valid()) {
//apply
Vector<Vector2> vertices = _get_polygon(edited_point.polygon);
ERR_FAIL_INDEX_V(edited_point.vertex, vertices.size(), false);
vertices[edited_point.vertex] = edited_point.pos - _get_offset(edited_point.polygon);
undo_redo->create_action(TTR("Edit Poly"));
_action_set_polygon(edited_point.polygon, pre_move_edit, vertices);
_commit_action();
edited_point = PosVertex();
return true;
}
}
} else if (mb->get_button_index() == BUTTON_RIGHT && mb->is_pressed() && !edited_point.valid()) {
const PosVertex closest = closest_point(gpoint);
if (closest.valid()) {
remove_point(closest);
return true;
}
}
} else if (mode == MODE_DELETE) {
if (mb->get_button_index() == BUTTON_LEFT && mb->is_pressed()) {
const PosVertex closest = closest_point(gpoint);
if (closest.valid()) {
remove_point(closest);
return true;
}
}
}
}
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid()) {
Vector2 gpoint = mm->get_position();
if (edited_point.valid() && (wip_active || (mm->get_button_mask() & BUTTON_MASK_LEFT))) {
Vector2 cpoint = _get_node()->get_global_transform().affine_inverse().xform(canvas_item_editor->snap_point(canvas_item_editor->get_canvas_transform().affine_inverse().xform(gpoint)));
edited_point = PosVertex(edited_point, cpoint);
if (!wip_active) {
Vector<Vector2> vertices = _get_polygon(edited_point.polygon);
ERR_FAIL_INDEX_V(edited_point.vertex, vertices.size(), false);
vertices[edited_point.vertex] = cpoint - _get_offset(edited_point.polygon);
_set_polygon(edited_point.polygon, vertices);
}
canvas_item_editor->get_viewport_control()->update();
} else if (mode == MODE_EDIT) {
const PosVertex onEdgeVertex = closest_edge_point(gpoint);
if (onEdgeVertex.valid()) {
hover_point = Vertex();
edge_point = onEdgeVertex;
canvas_item_editor->get_viewport_control()->update();
} else {
if (edge_point.valid()) {
edge_point = PosVertex();
canvas_item_editor->get_viewport_control()->update();
}
const PosVertex new_hover_point = closest_point(gpoint);
if (hover_point != new_hover_point) {
hover_point = new_hover_point;
canvas_item_editor->get_viewport_control()->update();
}
}
}
}
Ref<InputEventKey> k = p_event;
if (k.is_valid() && k->is_pressed()) {
if (k->get_scancode() == KEY_DELETE || k->get_scancode() == KEY_BACKSPACE) {
if (wip_active && selected_point.polygon == -1) {
if (wip.size() > selected_point.vertex) {
wip.remove(selected_point.vertex);
_wip_changed();
selected_point = wip.size() - 1;
canvas_item_editor->get_viewport_control()->update();
return true;
}
} else {
const Vertex active_point = get_active_point();
if (active_point.valid()) {
remove_point(active_point);
return true;
}
}
} else if (wip_active && k->get_scancode() == KEY_ENTER) {
_wip_close();
}
}
return false;
}
void AbstractPolygon2DEditor::forward_draw_over_canvas(Control *p_canvas) {
if (!_get_node())
return;
Control *vpc = canvas_item_editor->get_viewport_control();
Transform2D xform = canvas_item_editor->get_canvas_transform() * _get_node()->get_global_transform();
Ref<Texture> default_handle = get_icon("EditorHandle", "EditorIcons");
Ref<Texture> selected_handle = get_icon("EditorHandleSelected", "EditorIcons");
const Vertex active_point = get_active_point();
const int n_polygons = _get_polygon_count();
const bool is_closed = !_is_line();
for (int j = -1; j < n_polygons; j++) {
if (wip_active && wip_destructive && j != -1)
continue;
PoolVector<Vector2> points;
Vector2 offset;
if (wip_active && j == edited_point.polygon) {
points = Variant(wip);
offset = Vector2(0, 0);
} else {
if (j == -1)
continue;
points = _get_polygon(j);
offset = _get_offset(j);
}
if (!wip_active && j == edited_point.polygon && EDITOR_DEF("editors/poly_editor/show_previous_outline", true)) {
const Color col = Color(0.5, 0.5, 0.5); // FIXME polygon->get_outline_color();
const int n = pre_move_edit.size();
for (int i = 0; i < n - is_closed ? 0 : 1; i++) {
Vector2 p, p2;
p = pre_move_edit[i] + offset;
p2 = pre_move_edit[(i + 1) % n] + offset;
Vector2 point = xform.xform(p);
Vector2 next_point = xform.xform(p2);
vpc->draw_line(point, next_point, col, 2);
}
}
const int n_points = points.size();
const Color col = Color(1, 0.3, 0.1, 0.8);
for (int i = 0; i < n_points; i++) {
const Vertex vertex(j, i);
const Vector2 p = (vertex == edited_point) ? edited_point.pos : (points[i] + offset);
const Vector2 point = xform.xform(p);
if (is_closed || i < n_points - 1) {
Vector2 p2;
if (j == edited_point.polygon &&
((wip_active && i == n_points - 1) || (((i + 1) % n_points) == edited_point.vertex)))
p2 = edited_point.pos;
else
p2 = points[(i + 1) % n_points] + offset;
const Vector2 next_point = xform.xform(p2);
vpc->draw_line(point, next_point, col, 2);
}
}
for (int i = 0; i < n_points; i++) {
const Vertex vertex(j, i);
const Vector2 p = (vertex == edited_point) ? edited_point.pos : (points[i] + offset);
const Vector2 point = xform.xform(p);
Ref<Texture> handle = vertex == active_point ? selected_handle : default_handle;
vpc->draw_texture(handle, point - handle->get_size() * 0.5);
}
}
if (edge_point.valid()) {
Ref<Texture> add_handle = get_icon("EditorHandleAdd", "EditorIcons");
vpc->draw_texture(add_handle, edge_point.pos - add_handle->get_size() * 0.5);
}
}
void AbstractPolygon2DEditor::edit(Node *p_polygon) {
if (!canvas_item_editor) {
canvas_item_editor = CanvasItemEditor::get_singleton();
}
if (p_polygon) {
_set_node(p_polygon);
//Enable the pencil tool if the polygon is empty
if (_is_empty())
_menu_option(MODE_CREATE);
wip.clear();
wip_active = false;
edited_point = PosVertex();
hover_point = Vertex();
selected_point = Vertex();
canvas_item_editor->get_viewport_control()->update();
} else {
_set_node(NULL);
}
}
void AbstractPolygon2DEditor::_bind_methods() {
ClassDB::bind_method(D_METHOD("_node_removed"), &AbstractPolygon2DEditor::_node_removed);
ClassDB::bind_method(D_METHOD("_menu_option"), &AbstractPolygon2DEditor::_menu_option);
ClassDB::bind_method(D_METHOD("_create_resource"), &AbstractPolygon2DEditor::_create_resource);
}
void AbstractPolygon2DEditor::remove_point(const Vertex &p_vertex) {
PoolVector<Vector2> vertices = _get_polygon(p_vertex.polygon);
if (vertices.size() > 3) {
vertices.remove(p_vertex.vertex);
undo_redo->create_action(TTR("Edit Poly (Remove Point)"));
_action_set_polygon(p_vertex.polygon, vertices);
_commit_action();
} else {
undo_redo->create_action(TTR("Remove Poly And Point"));
_action_remove_polygon(p_vertex.polygon);
_commit_action();
}
if (_is_empty())
_menu_option(MODE_CREATE);
hover_point = Vertex();
if (selected_point == p_vertex)
selected_point = Vertex();
}
AbstractPolygon2DEditor::Vertex AbstractPolygon2DEditor::get_active_point() const {
return hover_point.valid() ? hover_point : selected_point;
}
AbstractPolygon2DEditor::PosVertex AbstractPolygon2DEditor::closest_point(const Vector2 &p_pos) const {
const real_t grab_threshold = EDITOR_DEF("editors/poly_editor/point_grab_radius", 8);
const int n_polygons = _get_polygon_count();
const Transform2D xform = canvas_item_editor->get_canvas_transform() * _get_node()->get_global_transform();
PosVertex closest;
real_t closest_dist = 1e10;
for (int j = 0; j < n_polygons; j++) {
PoolVector<Vector2> points = _get_polygon(j);
const Vector2 offset = _get_offset(j);
const int n_points = points.size();
for (int i = 0; i < n_points; i++) {
Vector2 cp = xform.xform(points[i] + offset);
real_t d = cp.distance_to(p_pos);
if (d < closest_dist && d < grab_threshold) {
closest_dist = d;
closest = PosVertex(j, i, cp);
}
}
}
return closest;
}
AbstractPolygon2DEditor::PosVertex AbstractPolygon2DEditor::closest_edge_point(const Vector2 &p_pos) const {
const real_t grab_threshold = EDITOR_DEF("editors/poly_editor/point_grab_radius", 8);
const real_t eps = grab_threshold * 2;
const real_t eps2 = eps * eps;
const int n_polygons = _get_polygon_count();
const Transform2D xform = canvas_item_editor->get_canvas_transform() * _get_node()->get_global_transform();
PosVertex closest;
real_t closest_dist = 1e10;
for (int j = 0; j < n_polygons; j++) {
PoolVector<Vector2> points = _get_polygon(j);
const Vector2 offset = _get_offset(j);
const int n_points = points.size();
for (int i = 0; i < n_points; i++) {
Vector2 segment[2] = { xform.xform(points[i] + offset),
xform.xform(points[(i + 1) % n_points] + offset) };
Vector2 cp = Geometry::get_closest_point_to_segment_2d(p_pos, segment);
if (cp.distance_squared_to(segment[0]) < eps2 || cp.distance_squared_to(segment[1]) < eps2)
continue; //not valid to reuse point
real_t d = cp.distance_to(p_pos);
if (d < closest_dist && d < grab_threshold) {
closest_dist = d;
closest = PosVertex(j, i, cp);
}
}
}
return closest;
}
AbstractPolygon2DEditor::AbstractPolygon2DEditor(EditorNode *p_editor, bool p_wip_destructive) {
canvas_item_editor = NULL;
editor = p_editor;
undo_redo = editor->get_undo_redo();
wip_active = false;
edited_point = PosVertex();
wip_destructive = p_wip_destructive;
hover_point = Vertex();
selected_point = Vertex();
edge_point = PosVertex();
add_child(memnew(VSeparator));
button_create = memnew(ToolButton);
add_child(button_create);
button_create->connect("pressed", this, "_menu_option", varray(MODE_CREATE));
button_create->set_toggle_mode(true);
button_create->set_tooltip(TTR("Create a new polygon from scratch"));
button_edit = memnew(ToolButton);
add_child(button_edit);
button_edit->connect("pressed", this, "_menu_option", varray(MODE_EDIT));
button_edit->set_toggle_mode(true);
button_edit->set_tooltip(TTR("Edit existing polygon:\nLMB: Move Point.\nCtrl+LMB: Split Segment.\nRMB: Erase Point."));
button_delete = memnew(ToolButton);
add_child(button_delete);
button_delete->connect("pressed", this, "_menu_option", varray(MODE_DELETE));
button_delete->set_toggle_mode(true);
button_delete->set_tooltip(TTR("Delete points"));
create_resource = memnew(ConfirmationDialog);
add_child(create_resource);
create_resource->get_ok()->set_text(TTR("Create"));
mode = MODE_EDIT;
}
void AbstractPolygon2DEditorPlugin::edit(Object *p_object) {
polygon_editor->edit(Object::cast_to<Node>(p_object));
}
bool AbstractPolygon2DEditorPlugin::handles(Object *p_object) const {
return p_object->is_class(klass);
}
void AbstractPolygon2DEditorPlugin::make_visible(bool p_visible) {
if (p_visible) {
polygon_editor->show();
} else {
polygon_editor->hide();
polygon_editor->edit(NULL);
}
}
AbstractPolygon2DEditorPlugin::AbstractPolygon2DEditorPlugin(EditorNode *p_node, AbstractPolygon2DEditor *p_polygon_editor, String p_class) {
editor = p_node;
polygon_editor = p_polygon_editor;
klass = p_class;
CanvasItemEditor::get_singleton()->add_control_to_menu_panel(polygon_editor);
polygon_editor->hide();
}
AbstractPolygon2DEditorPlugin::~AbstractPolygon2DEditorPlugin() {
}
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