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pandemonium_engine/editor/plugins/particles_editor_plugin.cpp

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/*************************************************************************/
/* particles_editor_plugin.cpp */
/*************************************************************************/
/* This file is part of: */
/* PANDEMONIUM ENGINE */
/* https://github.com/Relintai/pandemonium_engine */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "particles_editor_plugin.h"
#include "core/containers/list.h"
#include "core/containers/rb_map.h"
#include "core/error/error_macros.h"
#include "core/io/resource_loader.h"
#include "core/math/aabb.h"
#include "core/math/math_defs.h"
#include "core/math/math_funcs.h"
#include "core/math/plane.h"
#include "core/math/transform.h"
#include "core/math/vector2.h"
#include "core/math/vector3.h"
#include "core/object/class_db.h"
#include "core/os/memory.h"
#include "core/string/ustring.h"
#include "core/typedefs.h"
#include "core/variant/variant.h"
#include "editor/editor_file_dialog.h"
#include "editor/editor_node.h"
#include "editor/scene_tree_editor.h"
#include "scene/3d/visual_instance.h"
#include "scene/gui/box_container.h"
#include "scene/gui/button.h"
#include "scene/gui/dialogs.h"
#include "scene/gui/option_button.h"
#include "scene/gui/spin_box.h"
#include "scene/main/node.h"
#include "scene/main/spatial.h"
bool ParticlesEditorBase::_generate(PoolVector<Vector3> &points, PoolVector<Vector3> &normals) {
bool use_normals = emission_fill->get_selected() == 1;
if (emission_fill->get_selected() < 2) {
float area_accum = 0;
RBMap<float, int> triangle_area_map;
for (int i = 0; i < geometry.size(); i++) {
float area = geometry[i].get_area();
if (area < CMP_EPSILON) {
continue;
}
triangle_area_map[area_accum] = i;
area_accum += area;
}
if (!triangle_area_map.size() || area_accum == 0) {
EditorNode::get_singleton()->show_warning(TTR("The geometry's faces don't contain any area."));
return false;
}
int emissor_count = emission_amount->get_value();
for (int i = 0; i < emissor_count; i++) {
float areapos = Math::random(0.0f, area_accum);
RBMap<float, int>::Element *E = triangle_area_map.find_closest(areapos);
ERR_FAIL_COND_V(!E, false);
int index = E->get();
ERR_FAIL_INDEX_V(index, geometry.size(), false);
// ok FINALLY get face
Face3 face = geometry[index];
//now compute some position inside the face...
Vector3 pos = face.get_random_point_inside();
points.push_back(pos);
if (use_normals) {
Vector3 normal = face.get_plane().normal;
normals.push_back(normal);
}
}
} else {
int gcount = geometry.size();
if (gcount == 0) {
EditorNode::get_singleton()->show_warning(TTR("The geometry doesn't contain any faces."));
return false;
}
PoolVector<Face3>::Read r = geometry.read();
AABB aabb;
for (int i = 0; i < gcount; i++) {
for (int j = 0; j < 3; j++) {
if (i == 0 && j == 0) {
aabb.position = r[i].vertex[j];
} else {
aabb.expand_to(r[i].vertex[j]);
}
}
}
int emissor_count = emission_amount->get_value();
for (int i = 0; i < emissor_count; i++) {
int attempts = 5;
for (int j = 0; j < attempts; j++) {
Vector3 dir;
dir[Math::rand() % 3] = 1.0;
Vector3 ofs = (Vector3(1, 1, 1) - dir) * Vector3(Math::randf(), Math::randf(), Math::randf()) * aabb.size + aabb.position;
Vector3 ofsv = ofs + aabb.size * dir;
//space it a little
ofs -= dir;
ofsv += dir;
float max = -1e7, min = 1e7;
for (int k = 0; k < gcount; k++) {
const Face3 &f3 = r[k];
Vector3 res;
if (f3.intersects_segment(ofs, ofsv, &res)) {
res -= ofs;
float d = dir.dot(res);
if (d < min) {
min = d;
}
if (d > max) {
max = d;
}
}
}
if (max < min) {
continue; //lost attempt
}
float val = min + (max - min) * Math::randf();
Vector3 point = ofs + dir * val;
points.push_back(point);
break;
}
}
}
return true;
}
void ParticlesEditorBase::_node_selected(const NodePath &p_path) {
Node *sel = get_node(p_path);
if (!sel) {
return;
}
if (!sel->is_class("Spatial")) {
EditorNode::get_singleton()->show_warning(vformat(TTR("\"%s\" doesn't inherit from Spatial."), sel->get_name()));
return;
}
VisualInstance *vi = Object::cast_to<VisualInstance>(sel);
if (!vi) {
EditorNode::get_singleton()->show_warning(vformat(TTR("\"%s\" doesn't contain geometry."), sel->get_name()));
return;
}
geometry = vi->get_faces(VisualInstance::FACES_SOLID);
if (geometry.size() == 0) {
EditorNode::get_singleton()->show_warning(vformat(TTR("\"%s\" doesn't contain face geometry."), sel->get_name()));
return;
}
Transform geom_xform = base_node->get_global_transform().affine_inverse() * vi->get_global_transform();
int gc = geometry.size();
PoolVector<Face3>::Write w = geometry.write();
for (int i = 0; i < gc; i++) {
for (int j = 0; j < 3; j++) {
w[i].vertex[j] = geom_xform.xform(w[i].vertex[j]);
}
}
w.release();
emission_dialog->popup_centered(Size2(300, 130));
}
void ParticlesEditorBase::_bind_methods() {
ClassDB::bind_method("_node_selected", &ParticlesEditorBase::_node_selected);
ClassDB::bind_method("_generate_emission_points", &ParticlesEditorBase::_generate_emission_points);
}
ParticlesEditorBase::ParticlesEditorBase() {
emission_dialog = memnew(ConfirmationDialog);
emission_dialog->set_title(TTR("Create Emitter"));
add_child(emission_dialog);
VBoxContainer *emd_vb = memnew(VBoxContainer);
emission_dialog->add_child(emd_vb);
emission_amount = memnew(SpinBox);
emission_amount->set_min(1);
emission_amount->set_max(100000);
emission_amount->set_value(512);
emd_vb->add_margin_child(TTR("Emission Points:"), emission_amount);
emission_fill = memnew(OptionButton);
emission_fill->add_item(TTR("Surface Points"));
emission_fill->add_item(TTR("Surface Points+Normal (Directed)"));
emission_fill->add_item(TTR("Volume"));
emd_vb->add_margin_child(TTR("Emission Source: "), emission_fill);
emission_dialog->get_ok()->set_text(TTR("Create"));
emission_dialog->connect("confirmed", this, "_generate_emission_points");
emission_file_dialog = memnew(EditorFileDialog);
add_child(emission_file_dialog);
emission_file_dialog->connect("file_selected", this, "_resource_seleted");
emission_tree_dialog = memnew(SceneTreeDialog);
add_child(emission_tree_dialog);
emission_tree_dialog->connect("selected", this, "_node_selected");
List<String> extensions;
ResourceLoader::get_recognized_extensions_for_type("Mesh", &extensions);
emission_file_dialog->clear_filters();
for (int i = 0; i < extensions.size(); i++) {
emission_file_dialog->add_filter("*." + extensions[i] + " ; " + extensions[i].to_upper());
}
emission_file_dialog->set_mode(EditorFileDialog::MODE_OPEN_FILE);
}
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