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godot/editor/plugins/cpu_particles_2d_editor_plugin.cpp
Rémi Verschelde b5334d14f7
Update copyright statements to 2021 
Happy new year to the wonderful Godot community!

2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.

We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)

Here's to a great year 2021 for all Godot users 🎆
2021-01-01 20:19:21 +01:00

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/*************************************************************************/
/* cpu_particles_2d_editor_plugin.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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 "cpu_particles_2d_editor_plugin.h"
#include "canvas_item_editor_plugin.h"
#include "core/io/image_loader.h"
#include "scene/2d/cpu_particles_2d.h"
#include "scene/gui/separator.h"
#include "scene/resources/particles_material.h"
void CPUParticles2DEditorPlugin::edit(Object *p_object) {
particles = Object::cast_to<CPUParticles2D>(p_object);
}
bool CPUParticles2DEditorPlugin::handles(Object *p_object) const {
return p_object->is_class("CPUParticles2D");
}
void CPUParticles2DEditorPlugin::make_visible(bool p_visible) {
if (p_visible) {
toolbar->show();
} else {
toolbar->hide();
}
}
void CPUParticles2DEditorPlugin::_file_selected(const String &p_file) {
source_emission_file = p_file;
emission_mask->popup_centered();
}
void CPUParticles2DEditorPlugin::_menu_callback(int p_idx) {
switch (p_idx) {
case MENU_LOAD_EMISSION_MASK: {
file->popup_file_dialog();
} break;
case MENU_CLEAR_EMISSION_MASK: {
emission_mask->popup_centered();
} break;
case MENU_RESTART: {
particles->restart();
}
}
}
void CPUParticles2DEditorPlugin::_generate_emission_mask() {
Ref<Image> img;
img.instance();
Error err = ImageLoader::load_image(source_emission_file, img);
ERR_FAIL_COND_MSG(err != OK, "Error loading image '" + source_emission_file + "'.");
if (img->is_compressed()) {
img->decompress();
}
img->convert(Image::FORMAT_RGBA8);
ERR_FAIL_COND(img->get_format() != Image::FORMAT_RGBA8);
Size2i s = Size2(img->get_width(), img->get_height());
ERR_FAIL_COND(s.width == 0 || s.height == 0);
Vector<Point2> valid_positions;
Vector<Point2> valid_normals;
Vector<uint8_t> valid_colors;
valid_positions.resize(s.width * s.height);
EmissionMode emode = (EmissionMode)emission_mask_mode->get_selected();
if (emode == EMISSION_MODE_BORDER_DIRECTED) {
valid_normals.resize(s.width * s.height);
}
bool capture_colors = emission_colors->is_pressed();
if (capture_colors) {
valid_colors.resize(s.width * s.height * 4);
}
int vpc = 0;
{
Vector<uint8_t> data = img->get_data();
const uint8_t *r = data.ptr();
for (int i = 0; i < s.width; i++) {
for (int j = 0; j < s.height; j++) {
uint8_t a = r[(j * s.width + i) * 4 + 3];
if (a > 128) {
if (emode == EMISSION_MODE_SOLID) {
if (capture_colors) {
valid_colors.write[vpc * 4 + 0] = r[(j * s.width + i) * 4 + 0];
valid_colors.write[vpc * 4 + 1] = r[(j * s.width + i) * 4 + 1];
valid_colors.write[vpc * 4 + 2] = r[(j * s.width + i) * 4 + 2];
valid_colors.write[vpc * 4 + 3] = r[(j * s.width + i) * 4 + 3];
}
valid_positions.write[vpc++] = Point2(i, j);
} else {
bool on_border = false;
for (int x = i - 1; x <= i + 1; x++) {
for (int y = j - 1; y <= j + 1; y++) {
if (x < 0 || y < 0 || x >= s.width || y >= s.height || r[(y * s.width + x) * 4 + 3] <= 128) {
on_border = true;
break;
}
}
if (on_border) {
break;
}
}
if (on_border) {
valid_positions.write[vpc] = Point2(i, j);
if (emode == EMISSION_MODE_BORDER_DIRECTED) {
Vector2 normal;
for (int x = i - 2; x <= i + 2; x++) {
for (int y = j - 2; y <= j + 2; y++) {
if (x == i && y == j) {
continue;
}
if (x < 0 || y < 0 || x >= s.width || y >= s.height || r[(y * s.width + x) * 4 + 3] <= 128) {
normal += Vector2(x - i, y - j).normalized();
}
}
}
normal.normalize();
valid_normals.write[vpc] = normal;
}
if (capture_colors) {
valid_colors.write[vpc * 4 + 0] = r[(j * s.width + i) * 4 + 0];
valid_colors.write[vpc * 4 + 1] = r[(j * s.width + i) * 4 + 1];
valid_colors.write[vpc * 4 + 2] = r[(j * s.width + i) * 4 + 2];
valid_colors.write[vpc * 4 + 3] = r[(j * s.width + i) * 4 + 3];
}
vpc++;
}
}
}
}
}
}
valid_positions.resize(vpc);
if (valid_normals.size()) {
valid_normals.resize(vpc);
}
ERR_FAIL_COND_MSG(valid_positions.size() == 0, "No pixels with transparency > 128 in image...");
if (capture_colors) {
PackedColorArray pca;
pca.resize(vpc);
Color *pcaw = pca.ptrw();
for (int i = 0; i < vpc; i += 1) {
Color color;
color.r = valid_colors[i * 4 + 0] / 255.0f;
color.g = valid_colors[i * 4 + 1] / 255.0f;
color.b = valid_colors[i * 4 + 2] / 255.0f;
color.a = valid_colors[i * 4 + 3] / 255.0f;
pcaw[i] = color;
}
particles->set_emission_colors(pca);
}
if (valid_normals.size()) {
particles->set_emission_shape(CPUParticles2D::EMISSION_SHAPE_DIRECTED_POINTS);
PackedVector2Array norms;
norms.resize(valid_normals.size());
Vector2 *normsw = norms.ptrw();
for (int i = 0; i < valid_normals.size(); i += 1) {
normsw[i] = valid_normals[i];
}
particles->set_emission_normals(norms);
} else {
particles->set_emission_shape(CPUParticles2D::EMISSION_SHAPE_POINTS);
}
{
PackedVector2Array points;
points.resize(valid_positions.size());
Vector2 *pointsw = points.ptrw();
for (int i = 0; i < valid_positions.size(); i += 1) {
pointsw[i] = valid_positions[i];
}
particles->set_emission_points(points);
}
}
void CPUParticles2DEditorPlugin::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE) {
menu->get_popup()->connect("id_pressed", callable_mp(this, &CPUParticles2DEditorPlugin::_menu_callback));
menu->set_icon(epoints->get_theme_icon("CPUParticles2D", "EditorIcons"));
file->connect("file_selected", callable_mp(this, &CPUParticles2DEditorPlugin::_file_selected));
}
}
void CPUParticles2DEditorPlugin::_bind_methods() {
}
CPUParticles2DEditorPlugin::CPUParticles2DEditorPlugin(EditorNode *p_node) {
particles = nullptr;
editor = p_node;
undo_redo = editor->get_undo_redo();
toolbar = memnew(HBoxContainer);
add_control_to_container(CONTAINER_CANVAS_EDITOR_MENU, toolbar);
toolbar->hide();
toolbar->add_child(memnew(VSeparator));
menu = memnew(MenuButton);
menu->get_popup()->add_item(TTR("Restart"), MENU_RESTART);
menu->get_popup()->add_item(TTR("Load Emission Mask"), MENU_LOAD_EMISSION_MASK);
menu->set_text(TTR("CPUParticles2D"));
menu->set_switch_on_hover(true);
toolbar->add_child(menu);
file = memnew(EditorFileDialog);
List<String> ext;
ImageLoader::get_recognized_extensions(&ext);
for (List<String>::Element *E = ext.front(); E; E = E->next()) {
file->add_filter("*." + E->get() + "; " + E->get().to_upper());
}
file->set_file_mode(EditorFileDialog::FILE_MODE_OPEN_FILE);
toolbar->add_child(file);
epoints = memnew(SpinBox);
epoints->set_min(1);
epoints->set_max(8192);
epoints->set_step(1);
epoints->set_value(512);
file->get_vbox()->add_margin_child(TTR("Generated Point Count:"), epoints);
emission_mask = memnew(ConfirmationDialog);
emission_mask->set_title(TTR("Load Emission Mask"));
VBoxContainer *emvb = memnew(VBoxContainer);
emission_mask->add_child(emvb);
emission_mask_mode = memnew(OptionButton);
emvb->add_margin_child(TTR("Emission Mask"), emission_mask_mode);
emission_mask_mode->add_item(TTR("Solid Pixels"), EMISSION_MODE_SOLID);
emission_mask_mode->add_item(TTR("Border Pixels"), EMISSION_MODE_BORDER);
emission_mask_mode->add_item(TTR("Directed Border Pixels"), EMISSION_MODE_BORDER_DIRECTED);
emission_colors = memnew(CheckBox);
emission_colors->set_text(TTR("Capture from Pixel"));
emvb->add_margin_child(TTR("Emission Colors"), emission_colors);
toolbar->add_child(emission_mask);
emission_mask->connect("confirmed", callable_mp(this, &CPUParticles2DEditorPlugin::_generate_emission_mask));
}
CPUParticles2DEditorPlugin::~CPUParticles2DEditorPlugin() {
}
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