9d7c2978f4
- GraphEdit now uses Line2D nodes to draw connection lines and uses a dedicated canvas item shader for them
557 lines
19 KiB
C++
557 lines
19 KiB
C++
/**************************************************************************/
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/* graph_edit_arranger.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 "graph_edit_arranger.h"
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#include "scene/gui/graph_edit.h"
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void GraphEditArranger::arrange_nodes() {
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ERR_FAIL_NULL(graph_edit);
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if (!arranging_graph) {
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arranging_graph = true;
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} else {
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return;
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}
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Dictionary node_names;
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HashSet<StringName> selected_nodes;
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bool arrange_entire_graph = true;
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for (int i = graph_edit->get_child_count() - 1; i >= 0; i--) {
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GraphNode *graph_element = Object::cast_to<GraphNode>(graph_edit->get_child(i));
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if (!graph_element) {
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continue;
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}
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node_names[graph_element->get_name()] = graph_element;
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if (graph_element->is_selected()) {
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arrange_entire_graph = false;
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}
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}
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HashMap<StringName, HashSet<StringName>> upper_neighbours;
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HashMap<StringName, Pair<int, int>> port_info;
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Vector2 origin(FLT_MAX, FLT_MAX);
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float gap_v = 100.0f;
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float gap_h = 100.0f;
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List<Ref<GraphEdit::Connection>> connection_list = graph_edit->get_connection_list();
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for (int i = graph_edit->get_child_count() - 1; i >= 0; i--) {
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GraphNode *graph_element = Object::cast_to<GraphNode>(graph_edit->get_child(i));
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if (!graph_element) {
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continue;
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}
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if (graph_element->is_selected() || arrange_entire_graph) {
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selected_nodes.insert(graph_element->get_name());
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HashSet<StringName> s;
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for (const Ref<GraphEdit::Connection> &connection : connection_list) {
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GraphNode *p_from = Object::cast_to<GraphNode>(node_names[connection->from_node]);
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if (connection->to_node == graph_element->get_name() && (p_from->is_selected() || arrange_entire_graph) && connection->to_node != connection->from_node) {
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if (!s.has(p_from->get_name())) {
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s.insert(p_from->get_name());
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}
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String s_connection = String(p_from->get_name()) + " " + String(connection->to_node);
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StringName _connection(s_connection);
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Pair<int, int> ports(connection->from_port, connection->to_port);
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port_info.insert(_connection, ports);
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}
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}
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upper_neighbours.insert(graph_element->get_name(), s);
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}
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}
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if (!selected_nodes.size()) {
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arranging_graph = false;
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return;
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}
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HashMap<int, Vector<StringName>> layers = _layering(selected_nodes, upper_neighbours);
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_crossing_minimisation(layers, upper_neighbours);
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Dictionary root, align, sink, shift;
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_horizontal_alignment(root, align, layers, upper_neighbours, selected_nodes);
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HashMap<StringName, Vector2> new_positions;
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Vector2 default_position(FLT_MAX, FLT_MAX);
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Dictionary inner_shift;
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HashSet<StringName> block_heads;
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for (const StringName &E : selected_nodes) {
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inner_shift[E] = 0.0f;
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sink[E] = E;
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shift[E] = FLT_MAX;
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new_positions.insert(E, default_position);
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if ((StringName)root[E] == E) {
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block_heads.insert(E);
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}
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}
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_calculate_inner_shifts(inner_shift, root, node_names, align, block_heads, port_info);
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for (const StringName &E : block_heads) {
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_place_block(E, gap_v, layers, root, align, node_names, inner_shift, sink, shift, new_positions);
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}
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origin.y = Object::cast_to<GraphNode>(node_names[layers[0][0]])->get_position_offset().y - (new_positions[layers[0][0]].y + (float)inner_shift[layers[0][0]]);
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origin.x = Object::cast_to<GraphNode>(node_names[layers[0][0]])->get_position_offset().x;
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for (const StringName &E : block_heads) {
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StringName u = E;
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float start_from = origin.y + new_positions[E].y;
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do {
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Vector2 cal_pos;
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cal_pos.y = start_from + (real_t)inner_shift[u];
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new_positions.insert(u, cal_pos);
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u = align[u];
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} while (u != E);
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}
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// Compute horizontal coordinates individually for layers to get uniform gap.
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float start_from = origin.x;
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float largest_node_size = 0.0f;
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for (unsigned int i = 0; i < layers.size(); i++) {
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Vector<StringName> layer = layers[i];
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for (int j = 0; j < layer.size(); j++) {
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float current_node_size = Object::cast_to<GraphNode>(node_names[layer[j]])->get_size().x;
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largest_node_size = MAX(largest_node_size, current_node_size);
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}
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for (int j = 0; j < layer.size(); j++) {
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float current_node_size = Object::cast_to<GraphNode>(node_names[layer[j]])->get_size().x;
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Vector2 cal_pos = new_positions[layer[j]];
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if (current_node_size == largest_node_size) {
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cal_pos.x = start_from;
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} else {
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float current_node_start_pos = start_from;
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if (current_node_size < largest_node_size / 2) {
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if (!(i || j)) {
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start_from -= (largest_node_size - current_node_size);
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}
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current_node_start_pos = start_from + largest_node_size - current_node_size;
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}
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cal_pos.x = current_node_start_pos;
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}
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new_positions.insert(layer[j], cal_pos);
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}
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start_from += largest_node_size + gap_h;
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largest_node_size = 0.0f;
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}
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graph_edit->emit_signal(SNAME("begin_node_move"));
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for (const StringName &E : selected_nodes) {
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GraphNode *graph_node = Object::cast_to<GraphNode>(node_names[E]);
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graph_node->set_drag(true);
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Vector2 pos = (new_positions[E]);
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if (graph_edit->is_snapping_enabled()) {
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float snapping_distance = graph_edit->get_snapping_distance();
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pos = pos.snapped(Vector2(snapping_distance, snapping_distance));
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}
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graph_node->set_position_offset(pos);
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graph_node->set_drag(false);
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}
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graph_edit->emit_signal(SNAME("end_node_move"));
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arranging_graph = false;
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}
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int GraphEditArranger::_set_operations(SET_OPERATIONS p_operation, HashSet<StringName> &r_u, const HashSet<StringName> &r_v) {
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switch (p_operation) {
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case GraphEditArranger::IS_EQUAL: {
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for (const StringName &E : r_u) {
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if (!r_v.has(E)) {
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return 0;
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}
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}
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return r_u.size() == r_v.size();
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} break;
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case GraphEditArranger::IS_SUBSET: {
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if (r_u.size() == r_v.size() && !r_u.size()) {
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return 1;
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}
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for (const StringName &E : r_u) {
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if (!r_v.has(E)) {
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return 0;
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}
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}
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return 1;
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} break;
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case GraphEditArranger::DIFFERENCE: {
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Vector<StringName> common;
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for (const StringName &E : r_u) {
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if (r_v.has(E)) {
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common.append(E);
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}
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}
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for (const StringName &E : common) {
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r_u.erase(E);
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}
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return r_u.size();
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} break;
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case GraphEditArranger::UNION: {
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for (const StringName &E : r_v) {
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if (!r_u.has(E)) {
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r_u.insert(E);
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}
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}
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return r_u.size();
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} break;
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default:
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break;
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}
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return -1;
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}
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HashMap<int, Vector<StringName>> GraphEditArranger::_layering(const HashSet<StringName> &r_selected_nodes, const HashMap<StringName, HashSet<StringName>> &r_upper_neighbours) {
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HashMap<int, Vector<StringName>> l;
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HashSet<StringName> p = r_selected_nodes, q = r_selected_nodes, u, z;
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int current_layer = 0;
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bool selected = false;
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while (!_set_operations(GraphEditArranger::IS_EQUAL, q, u)) {
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_set_operations(GraphEditArranger::DIFFERENCE, p, u);
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for (const StringName &E : p) {
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HashSet<StringName> n = r_upper_neighbours[E];
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if (_set_operations(GraphEditArranger::IS_SUBSET, n, z)) {
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Vector<StringName> t;
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t.push_back(E);
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if (!l.has(current_layer)) {
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l.insert(current_layer, Vector<StringName>{});
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}
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selected = true;
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t.append_array(l[current_layer]);
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l.insert(current_layer, t);
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u.insert(E);
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}
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}
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if (!selected) {
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current_layer++;
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uint32_t previous_size_z = z.size();
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_set_operations(GraphEditArranger::UNION, z, u);
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if (z.size() == previous_size_z) {
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WARN_PRINT("Graph contains cycle(s). The cycle(s) will not be rearranged accurately.");
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Vector<StringName> t;
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if (l.has(0)) {
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t.append_array(l[0]);
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}
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for (const StringName &E : p) {
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t.push_back(E);
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}
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l.insert(0, t);
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break;
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}
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}
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selected = false;
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}
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return l;
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}
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Vector<StringName> GraphEditArranger::_split(const Vector<StringName> &r_layer, const HashMap<StringName, Dictionary> &r_crossings) {
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if (!r_layer.size()) {
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return Vector<StringName>();
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}
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const StringName &p = r_layer[Math::random(0, r_layer.size() - 1)];
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Vector<StringName> left;
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Vector<StringName> right;
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for (int i = 0; i < r_layer.size(); i++) {
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if (p != r_layer[i]) {
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const StringName &q = r_layer[i];
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int cross_pq = r_crossings[p][q];
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int cross_qp = r_crossings[q][p];
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if (cross_pq > cross_qp) {
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left.push_back(q);
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} else {
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right.push_back(q);
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}
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}
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}
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left.push_back(p);
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left.append_array(right);
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return left;
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}
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void GraphEditArranger::_horizontal_alignment(Dictionary &r_root, Dictionary &r_align, const HashMap<int, Vector<StringName>> &r_layers, const HashMap<StringName, HashSet<StringName>> &r_upper_neighbours, const HashSet<StringName> &r_selected_nodes) {
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for (const StringName &E : r_selected_nodes) {
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r_root[E] = E;
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r_align[E] = E;
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}
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if (r_layers.size() == 1) {
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return;
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}
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for (unsigned int i = 1; i < r_layers.size(); i++) {
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Vector<StringName> lower_layer = r_layers[i];
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Vector<StringName> upper_layer = r_layers[i - 1];
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int r = -1;
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for (int j = 0; j < lower_layer.size(); j++) {
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Vector<Pair<int, StringName>> up;
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const StringName ¤t_node = lower_layer[j];
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for (int k = 0; k < upper_layer.size(); k++) {
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const StringName &adjacent_neighbour = upper_layer[k];
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if (r_upper_neighbours[current_node].has(adjacent_neighbour)) {
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up.push_back(Pair<int, StringName>(k, adjacent_neighbour));
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}
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}
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int start = (up.size() - 1) / 2;
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int end = (up.size() - 1) % 2 ? start + 1 : start;
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for (int p = start; p <= end; p++) {
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StringName Align = r_align[current_node];
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if (Align == current_node && r < up[p].first) {
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r_align[up[p].second] = lower_layer[j];
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r_root[current_node] = r_root[up[p].second];
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r_align[current_node] = r_root[up[p].second];
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r = up[p].first;
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}
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}
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}
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}
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}
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void GraphEditArranger::_crossing_minimisation(HashMap<int, Vector<StringName>> &r_layers, const HashMap<StringName, HashSet<StringName>> &r_upper_neighbours) {
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if (r_layers.size() == 1) {
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return;
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}
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for (unsigned int i = 1; i < r_layers.size(); i++) {
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Vector<StringName> upper_layer = r_layers[i - 1];
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Vector<StringName> lower_layer = r_layers[i];
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HashMap<StringName, Dictionary> c;
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for (int j = 0; j < lower_layer.size(); j++) {
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const StringName &p = lower_layer[j];
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Dictionary d;
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for (int k = 0; k < lower_layer.size(); k++) {
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unsigned int crossings = 0;
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const StringName &q = lower_layer[k];
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if (j != k) {
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for (int h = 1; h < upper_layer.size(); h++) {
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if (r_upper_neighbours[p].has(upper_layer[h])) {
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for (int g = 0; g < h; g++) {
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if (r_upper_neighbours[q].has(upper_layer[g])) {
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crossings++;
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}
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}
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}
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}
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}
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d[q] = crossings;
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}
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c.insert(p, d);
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}
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r_layers.insert(i, _split(lower_layer, c));
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}
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}
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void GraphEditArranger::_calculate_inner_shifts(Dictionary &r_inner_shifts, const Dictionary &r_root, const Dictionary &r_node_names, const Dictionary &r_align, const HashSet<StringName> &r_block_heads, const HashMap<StringName, Pair<int, int>> &r_port_info) {
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for (const StringName &E : r_block_heads) {
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real_t left = 0;
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StringName u = E;
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StringName v = r_align[u];
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while (u != v && (StringName)r_root[u] != v) {
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String _connection = String(u) + " " + String(v);
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GraphNode *gnode_from = Object::cast_to<GraphNode>(r_node_names[u]);
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GraphNode *gnode_to = Object::cast_to<GraphNode>(r_node_names[v]);
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Pair<int, int> ports = r_port_info[_connection];
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int port_from = ports.first;
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int port_to = ports.second;
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Vector2 pos_from = gnode_from->get_output_port_position(port_from) * graph_edit->get_zoom();
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Vector2 pos_to = gnode_to->get_input_port_position(port_to) * graph_edit->get_zoom();
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real_t s = (real_t)r_inner_shifts[u] + (pos_from.y - pos_to.y) / graph_edit->get_zoom();
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r_inner_shifts[v] = s;
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left = MIN(left, s);
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u = v;
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v = (StringName)r_align[v];
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}
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u = E;
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do {
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r_inner_shifts[u] = (real_t)r_inner_shifts[u] - left;
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u = (StringName)r_align[u];
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} while (u != E);
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}
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}
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float GraphEditArranger::_calculate_threshold(const StringName &p_v, const StringName &p_w, const Dictionary &r_node_names, const HashMap<int, Vector<StringName>> &r_layers, const Dictionary &r_root, const Dictionary &r_align, const Dictionary &r_inner_shift, real_t p_current_threshold, const HashMap<StringName, Vector2> &r_node_positions) {
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#define MAX_ORDER 2147483647
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#define ORDER(node, layers) \
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for (unsigned int i = 0; i < layers.size(); i++) { \
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int index = layers[i].find(node); \
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if (index > 0) { \
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order = index; \
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break; \
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} \
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order = MAX_ORDER; \
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}
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int order = MAX_ORDER;
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float threshold = p_current_threshold;
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if (p_v == p_w) {
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int min_order = MAX_ORDER;
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Ref<GraphEdit::Connection> incoming;
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List<Ref<GraphEdit::Connection>> connection_list = graph_edit->get_connection_list();
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for (const Ref<GraphEdit::Connection> &connection : connection_list) {
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if (connection->to_node == p_w) {
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ORDER(connection->from_node, r_layers);
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if (min_order > order) {
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min_order = order;
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incoming = connection;
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}
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}
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}
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if (incoming.is_valid()) {
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GraphNode *gnode_from = Object::cast_to<GraphNode>(r_node_names[incoming->from_node]);
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GraphNode *gnode_to = Object::cast_to<GraphNode>(r_node_names[p_w]);
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Vector2 pos_from = gnode_from->get_output_port_position(incoming->from_port) * graph_edit->get_zoom();
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Vector2 pos_to = gnode_to->get_input_port_position(incoming->to_port) * graph_edit->get_zoom();
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// If connected block node is selected, calculate thershold or add current block to list.
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if (gnode_from->is_selected()) {
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Vector2 connected_block_pos = r_node_positions[r_root[incoming->from_node]];
|
|
if (connected_block_pos.y != FLT_MAX) {
|
|
//Connected block is placed, calculate threshold.
|
|
threshold = connected_block_pos.y + (real_t)r_inner_shift[incoming->from_node] - (real_t)r_inner_shift[p_w] + pos_from.y - pos_to.y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (threshold == FLT_MIN && (StringName)r_align[p_w] == p_v) {
|
|
// This time, pick an outgoing edge and repeat as above!
|
|
int min_order = MAX_ORDER;
|
|
Ref<GraphEdit::Connection> outgoing;
|
|
List<Ref<GraphEdit::Connection>> connection_list = graph_edit->get_connection_list();
|
|
for (const Ref<GraphEdit::Connection> &connection : connection_list) {
|
|
if (connection->from_node == p_w) {
|
|
ORDER(connection->to_node, r_layers);
|
|
if (min_order > order) {
|
|
min_order = order;
|
|
outgoing = connection;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (outgoing.is_valid()) {
|
|
GraphNode *gnode_from = Object::cast_to<GraphNode>(r_node_names[p_w]);
|
|
GraphNode *gnode_to = Object::cast_to<GraphNode>(r_node_names[outgoing->to_node]);
|
|
Vector2 pos_from = gnode_from->get_output_port_position(outgoing->from_port) * graph_edit->get_zoom();
|
|
Vector2 pos_to = gnode_to->get_input_port_position(outgoing->to_port) * graph_edit->get_zoom();
|
|
|
|
// If connected block node is selected, calculate thershold or add current block to list.
|
|
if (gnode_to->is_selected()) {
|
|
Vector2 connected_block_pos = r_node_positions[r_root[outgoing->to_node]];
|
|
if (connected_block_pos.y != FLT_MAX) {
|
|
//Connected block is placed. Calculate threshold
|
|
threshold = connected_block_pos.y + (real_t)r_inner_shift[outgoing->to_node] - (real_t)r_inner_shift[p_w] + pos_from.y - pos_to.y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#undef MAX_ORDER
|
|
#undef ORDER
|
|
return threshold;
|
|
}
|
|
|
|
void GraphEditArranger::_place_block(const StringName &p_v, float p_delta, const HashMap<int, Vector<StringName>> &r_layers, const Dictionary &r_root, const Dictionary &r_align, const Dictionary &r_node_name, const Dictionary &r_inner_shift, Dictionary &r_sink, Dictionary &r_shift, HashMap<StringName, Vector2> &r_node_positions) {
|
|
#define PRED(node, layers) \
|
|
for (unsigned int i = 0; i < layers.size(); i++) { \
|
|
int index = layers[i].find(node); \
|
|
if (index > 0) { \
|
|
predecessor = layers[i][index - 1]; \
|
|
break; \
|
|
} \
|
|
predecessor = StringName(); \
|
|
}
|
|
|
|
StringName predecessor;
|
|
StringName successor;
|
|
Vector2 pos = r_node_positions[p_v];
|
|
|
|
if (pos.y == FLT_MAX) {
|
|
pos.y = 0;
|
|
bool initial = false;
|
|
StringName w = p_v;
|
|
real_t threshold = FLT_MIN;
|
|
do {
|
|
PRED(w, r_layers);
|
|
if (predecessor != StringName()) {
|
|
StringName u = r_root[predecessor];
|
|
_place_block(u, p_delta, r_layers, r_root, r_align, r_node_name, r_inner_shift, r_sink, r_shift, r_node_positions);
|
|
threshold = _calculate_threshold(p_v, w, r_node_name, r_layers, r_root, r_align, r_inner_shift, threshold, r_node_positions);
|
|
if ((StringName)r_sink[p_v] == p_v) {
|
|
r_sink[p_v] = r_sink[u];
|
|
}
|
|
|
|
Vector2 predecessor_root_pos = r_node_positions[u];
|
|
Vector2 predecessor_node_size = Object::cast_to<GraphNode>(r_node_name[predecessor])->get_size();
|
|
if (r_sink[p_v] != r_sink[u]) {
|
|
real_t sc = pos.y + (real_t)r_inner_shift[w] - predecessor_root_pos.y - (real_t)r_inner_shift[predecessor] - predecessor_node_size.y - p_delta;
|
|
r_shift[r_sink[u]] = MIN(sc, (real_t)r_shift[r_sink[u]]);
|
|
} else {
|
|
real_t sb = predecessor_root_pos.y + (real_t)r_inner_shift[predecessor] + predecessor_node_size.y - (real_t)r_inner_shift[w] + p_delta;
|
|
sb = MAX(sb, threshold);
|
|
if (initial) {
|
|
pos.y = sb;
|
|
} else {
|
|
pos.y = MAX(pos.y, sb);
|
|
}
|
|
initial = false;
|
|
}
|
|
}
|
|
threshold = _calculate_threshold(p_v, w, r_node_name, r_layers, r_root, r_align, r_inner_shift, threshold, r_node_positions);
|
|
w = r_align[w];
|
|
} while (w != p_v);
|
|
r_node_positions.insert(p_v, pos);
|
|
}
|
|
|
|
#undef PRED
|
|
}
|