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cpu_particles_2d.cpp
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/**************************************************************************/
/* cpu_particles_2d.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 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 "cpu_particles_2d.h"
#include "cpu_particles_2d.compat.inc"
#include "core/math/random_number_generator.h"
#include "core/math/transform_interpolator.h"
#include "scene/2d/gpu_particles_2d.h"
#include "scene/resources/atlas_texture.h"
#include "scene/resources/canvas_item_material.h"
#include "scene/resources/curve_texture.h"
#include "scene/resources/gradient_texture.h"
#include "scene/resources/particle_process_material.h"
void CPUParticles2D::set_emitting(bool p_emitting) {
if (emitting == p_emitting) {
return;
}
if (p_emitting && !use_fixed_seed) {
set_seed(Math::rand());
}
emitting = p_emitting;
if (emitting) {
_set_emitting();
}
}
void CPUParticles2D::_set_emitting() {
active = true;
set_process_internal(true);
// first update before rendering to avoid one frame delay after emitting starts
if (time == 0) {
_update_internal();
}
}
void CPUParticles2D::set_amount(int p_amount) {
ERR_FAIL_COND_MSG(p_amount < 1, "Amount of particles must be greater than 0.");
particles.resize(p_amount);
{
Particle *w = particles.ptrw();
for (int i = 0; i < p_amount; i++) {
w[i].active = false;
}
}
particle_data.resize((8 + 4 + 4) * p_amount);
RS::get_singleton()->multimesh_allocate_data(multimesh, p_amount, RS::MULTIMESH_TRANSFORM_2D, true, true);
particle_order.resize(p_amount);
}
void CPUParticles2D::set_lifetime(double p_lifetime) {
ERR_FAIL_COND_MSG(p_lifetime <= 0, "Particles lifetime must be greater than 0.");
lifetime = p_lifetime;
}
void CPUParticles2D::set_one_shot(bool p_one_shot) {
one_shot = p_one_shot;
}
void CPUParticles2D::set_pre_process_time(double p_time) {
pre_process_time = p_time;
}
void CPUParticles2D::set_explosiveness_ratio(real_t p_ratio) {
explosiveness_ratio = p_ratio;
}
void CPUParticles2D::set_randomness_ratio(real_t p_ratio) {
randomness_ratio = p_ratio;
}
void CPUParticles2D::set_lifetime_randomness(double p_random) {
lifetime_randomness = p_random;
}
void CPUParticles2D::set_use_local_coordinates(bool p_enable) {
local_coords = p_enable;
// Prevent sending item transforms when using global coords,
// and inform the RenderingServer to use identity mode.
set_canvas_item_use_identity_transform(!local_coords);
// We only need NOTIFICATION_TRANSFORM_CHANGED
// when following an interpolated target.
#ifdef TOOLS_ENABLED
set_notify_transform(_interpolation_data.interpolated_follow || (Engine::get_singleton()->is_editor_hint() && !local_coords));
#else
set_notify_transform(_interpolation_data.interpolated_follow);
#endif
queue_redraw();
}
void CPUParticles2D::set_speed_scale(double p_scale) {
speed_scale = p_scale;
}
bool CPUParticles2D::is_emitting() const {
return emitting;
}
int CPUParticles2D::get_amount() const {
return particles.size();
}
double CPUParticles2D::get_lifetime() const {
return lifetime;
}
bool CPUParticles2D::get_one_shot() const {
return one_shot;
}
double CPUParticles2D::get_pre_process_time() const {
return pre_process_time;
}
real_t CPUParticles2D::get_explosiveness_ratio() const {
return explosiveness_ratio;
}
real_t CPUParticles2D::get_randomness_ratio() const {
return randomness_ratio;
}
double CPUParticles2D::get_lifetime_randomness() const {
return lifetime_randomness;
}
bool CPUParticles2D::get_use_local_coordinates() const {
return local_coords;
}
double CPUParticles2D::get_speed_scale() const {
return speed_scale;
}
void CPUParticles2D::set_draw_order(DrawOrder p_order) {
draw_order = p_order;
}
CPUParticles2D::DrawOrder CPUParticles2D::get_draw_order() const {
return draw_order;
}
void CPUParticles2D::_update_mesh_texture() {
Size2 tex_size;
if (texture.is_valid()) {
tex_size = texture->get_size();
} else {
tex_size = Size2(1, 1);
}
Vector<Vector2> vertices = {
-tex_size * 0.5,
-tex_size * 0.5 + Vector2(tex_size.x, 0),
-tex_size * 0.5 + tex_size,
-tex_size * 0.5 + Vector2(0, tex_size.y)
};
Vector<Vector2> uvs;
AtlasTexture *atlas_texture = Object::cast_to<AtlasTexture>(*texture);
if (atlas_texture && atlas_texture->get_atlas().is_valid()) {
Rect2 region_rect = atlas_texture->get_region();
Size2 atlas_size = atlas_texture->get_atlas()->get_size();
uvs.push_back(Vector2(region_rect.position.x / atlas_size.x, region_rect.position.y / atlas_size.y));
uvs.push_back(Vector2((region_rect.position.x + region_rect.size.x) / atlas_size.x, region_rect.position.y / atlas_size.y));
uvs.push_back(Vector2((region_rect.position.x + region_rect.size.x) / atlas_size.x, (region_rect.position.y + region_rect.size.y) / atlas_size.y));
uvs.push_back(Vector2(region_rect.position.x / atlas_size.x, (region_rect.position.y + region_rect.size.y) / atlas_size.y));
} else {
uvs.push_back(Vector2(0, 0));
uvs.push_back(Vector2(1, 0));
uvs.push_back(Vector2(1, 1));
uvs.push_back(Vector2(0, 1));
}
Vector<Color> colors = {
Color(1, 1, 1, 1),
Color(1, 1, 1, 1),
Color(1, 1, 1, 1),
Color(1, 1, 1, 1)
};
Vector<int> indices = { 0, 1, 2, 2, 3, 0 };
Array arr;
arr.resize(RS::ARRAY_MAX);
arr[RS::ARRAY_VERTEX] = vertices;
arr[RS::ARRAY_TEX_UV] = uvs;
arr[RS::ARRAY_COLOR] = colors;
arr[RS::ARRAY_INDEX] = indices;
RS::get_singleton()->mesh_clear(mesh);
RS::get_singleton()->mesh_add_surface_from_arrays(mesh, RS::PRIMITIVE_TRIANGLES, arr);
}
void CPUParticles2D::set_texture(const Ref<Texture2D> &p_texture) {
if (p_texture == texture) {
return;
}
if (texture.is_valid()) {
texture->disconnect_changed(callable_mp(this, &CPUParticles2D::_texture_changed));
}
texture = p_texture;
if (texture.is_valid()) {
texture->connect_changed(callable_mp(this, &CPUParticles2D::_texture_changed));
}
queue_redraw();
_update_mesh_texture();
}
void CPUParticles2D::_texture_changed() {
if (texture.is_valid()) {
queue_redraw();
_update_mesh_texture();
}
}
void CPUParticles2D::_refresh_interpolation_state() {
if (!is_inside_tree()) {
return;
}
// The logic for whether to do an interpolated follow.
// This is rather complex, but basically:
// If project setting interpolation is ON and this particle system is in global mode,
// we will follow the INTERPOLATED position rather than the actual position.
// This is so that particles aren't generated AHEAD of the interpolated parent.
bool follow = !local_coords && get_tree()->is_physics_interpolation_enabled();
if (follow == _interpolation_data.interpolated_follow) {
return;
}
_interpolation_data.interpolated_follow = follow;
set_physics_process_internal(_interpolation_data.interpolated_follow);
}
Ref<Texture2D> CPUParticles2D::get_texture() const {
return texture;
}
void CPUParticles2D::set_fixed_fps(int p_count) {
fixed_fps = p_count;
}
int CPUParticles2D::get_fixed_fps() const {
return fixed_fps;
}
void CPUParticles2D::set_fractional_delta(bool p_enable) {
fractional_delta = p_enable;
}
bool CPUParticles2D::get_fractional_delta() const {
return fractional_delta;
}
PackedStringArray CPUParticles2D::get_configuration_warnings() const {
PackedStringArray warnings = Node2D::get_configuration_warnings();
CanvasItemMaterial *mat = Object::cast_to<CanvasItemMaterial>(get_material().ptr());
if (get_material().is_null() || (mat && !mat->get_particles_animation())) {
if (get_param_max(PARAM_ANIM_SPEED) != 0.0 || get_param_max(PARAM_ANIM_OFFSET) != 0.0 ||
get_param_curve(PARAM_ANIM_SPEED).is_valid() || get_param_curve(PARAM_ANIM_OFFSET).is_valid()) {
warnings.push_back(RTR("CPUParticles2D animation requires the usage of a CanvasItemMaterial with \"Particles Animation\" enabled."));
}
}
return warnings;
}
void CPUParticles2D::restart(bool p_keep_seed) {
time = 0;
frame_remainder = 0;
cycle = 0;
emitting = false;
{
int pc = particles.size();
Particle *w = particles.ptrw();
for (int i = 0; i < pc; i++) {
w[i].active = false;
}
}
if (!p_keep_seed && !use_fixed_seed) {
seed = Math::rand();
}
emitting = true;
_set_emitting();
}
void CPUParticles2D::set_direction(Vector2 p_direction) {
direction = p_direction;
}
Vector2 CPUParticles2D::get_direction() const {
return direction;
}
void CPUParticles2D::set_spread(real_t p_spread) {
spread = p_spread;
}
real_t CPUParticles2D::get_spread() const {
return spread;
}
void CPUParticles2D::set_param_min(Parameter p_param, real_t p_value) {
ERR_FAIL_INDEX(p_param, PARAM_MAX);
parameters_min[p_param] = p_value;
if (parameters_min[p_param] > parameters_max[p_param]) {
set_param_max(p_param, p_value);
}
}
real_t CPUParticles2D::get_param_min(Parameter p_param) const {
ERR_FAIL_INDEX_V(p_param, PARAM_MAX, 0);
return parameters_min[p_param];
}
void CPUParticles2D::set_param_max(Parameter p_param, real_t p_value) {
ERR_FAIL_INDEX(p_param, PARAM_MAX);
parameters_max[p_param] = p_value;
if (parameters_min[p_param] > parameters_max[p_param]) {
set_param_min(p_param, p_value);
}
update_configuration_warnings();
}
real_t CPUParticles2D::get_param_max(Parameter p_param) const {
ERR_FAIL_INDEX_V(p_param, PARAM_MAX, 0);
return parameters_max[p_param];
}
static void _adjust_curve_range(const Ref<Curve> &p_curve, real_t p_min, real_t p_max) {
Ref<Curve> curve = p_curve;
if (curve.is_null()) {
return;
}
curve->ensure_default_setup(p_min, p_max);
}
void CPUParticles2D::set_param_curve(Parameter p_param, const Ref<Curve> &p_curve) {
ERR_FAIL_INDEX(p_param, PARAM_MAX);
curve_parameters[p_param] = p_curve;
switch (p_param) {
case PARAM_INITIAL_LINEAR_VELOCITY: {
//do none for this one
} break;
case PARAM_ANGULAR_VELOCITY: {
_adjust_curve_range(p_curve, -360, 360);
} break;
case PARAM_ORBIT_VELOCITY: {
_adjust_curve_range(p_curve, -500, 500);
} break;
case PARAM_LINEAR_ACCEL: {
_adjust_curve_range(p_curve, -200, 200);
} break;
case PARAM_RADIAL_ACCEL: {
_adjust_curve_range(p_curve, -200, 200);
} break;
case PARAM_TANGENTIAL_ACCEL: {
_adjust_curve_range(p_curve, -200, 200);
} break;
case PARAM_DAMPING: {
_adjust_curve_range(p_curve, 0, 100);
} break;
case PARAM_ANGLE: {
_adjust_curve_range(p_curve, -360, 360);
} break;
case PARAM_SCALE: {
} break;
case PARAM_HUE_VARIATION: {
_adjust_curve_range(p_curve, -1, 1);
} break;
case PARAM_ANIM_SPEED: {
_adjust_curve_range(p_curve, 0, 200);
} break;
case PARAM_ANIM_OFFSET: {
} break;
default: {
}
}
update_configuration_warnings();
}
Ref<Curve> CPUParticles2D::get_param_curve(Parameter p_param) const {
ERR_FAIL_INDEX_V(p_param, PARAM_MAX, Ref<Curve>());
return curve_parameters[p_param];
}
void CPUParticles2D::set_color(const Color &p_color) {
color = p_color;
}
Color CPUParticles2D::get_color() const {
return color;
}
void CPUParticles2D::set_color_ramp(const Ref<Gradient> &p_ramp) {
color_ramp = p_ramp;
}
Ref<Gradient> CPUParticles2D::get_color_ramp() const {
return color_ramp;
}
void CPUParticles2D::set_color_initial_ramp(const Ref<Gradient> &p_ramp) {
color_initial_ramp = p_ramp;
}
Ref<Gradient> CPUParticles2D::get_color_initial_ramp() const {
return color_initial_ramp;
}
void CPUParticles2D::set_particle_flag(ParticleFlags p_particle_flag, bool p_enable) {
ERR_FAIL_INDEX(p_particle_flag, PARTICLE_FLAG_MAX);
particle_flags[p_particle_flag] = p_enable;
}
bool CPUParticles2D::get_particle_flag(ParticleFlags p_particle_flag) const {
ERR_FAIL_INDEX_V(p_particle_flag, PARTICLE_FLAG_MAX, false);
return particle_flags[p_particle_flag];
}
void CPUParticles2D::set_emission_shape(EmissionShape p_shape) {
ERR_FAIL_INDEX(p_shape, EMISSION_SHAPE_MAX);
emission_shape = p_shape;
notify_property_list_changed();
#ifdef TOOLS_ENABLED
if (Engine::get_singleton()->is_editor_hint()) {
queue_redraw();
}
#endif
}
void CPUParticles2D::set_emission_sphere_radius(real_t p_radius) {
if (p_radius == emission_sphere_radius) {
return;
}
emission_sphere_radius = p_radius;
#ifdef TOOLS_ENABLED
if (Engine::get_singleton()->is_editor_hint()) {
queue_redraw();
}
#endif
}
void CPUParticles2D::set_emission_rect_extents(Vector2 p_extents) {
if (p_extents == emission_rect_extents) {
return;
}
emission_rect_extents = p_extents;
#ifdef TOOLS_ENABLED
if (Engine::get_singleton()->is_editor_hint()) {
queue_redraw();
}
#endif
}
void CPUParticles2D::set_emission_points(const Vector<Vector2> &p_points) {
emission_points = p_points;
}
void CPUParticles2D::set_emission_normals(const Vector<Vector2> &p_normals) {
emission_normals = p_normals;
}
void CPUParticles2D::set_emission_colors(const Vector<Color> &p_colors) {
emission_colors = p_colors;
}
real_t CPUParticles2D::get_emission_sphere_radius() const {
return emission_sphere_radius;
}
Vector2 CPUParticles2D::get_emission_rect_extents() const {
return emission_rect_extents;
}
Vector<Vector2> CPUParticles2D::get_emission_points() const {
return emission_points;
}
Vector<Vector2> CPUParticles2D::get_emission_normals() const {
return emission_normals;
}
Vector<Color> CPUParticles2D::get_emission_colors() const {
return emission_colors;
}
CPUParticles2D::EmissionShape CPUParticles2D::get_emission_shape() const {
return emission_shape;
}
void CPUParticles2D::set_gravity(const Vector2 &p_gravity) {
gravity = p_gravity;
}
Vector2 CPUParticles2D::get_gravity() const {
return gravity;
}
void CPUParticles2D::set_scale_curve_x(Ref<Curve> p_scale_curve) {
scale_curve_x = p_scale_curve;
}
void CPUParticles2D::set_scale_curve_y(Ref<Curve> p_scale_curve) {
scale_curve_y = p_scale_curve;
}
void CPUParticles2D::set_split_scale(bool p_split_scale) {
split_scale = p_split_scale;
notify_property_list_changed();
}
Ref<Curve> CPUParticles2D::get_scale_curve_x() const {
return scale_curve_x;
}
Ref<Curve> CPUParticles2D::get_scale_curve_y() const {
return scale_curve_y;
}
bool CPUParticles2D::get_split_scale() {
return split_scale;
}
void CPUParticles2D::set_use_fixed_seed(bool p_use_fixed_seed) {
if (p_use_fixed_seed == use_fixed_seed) {
return;
}
use_fixed_seed = p_use_fixed_seed;
notify_property_list_changed();
}
bool CPUParticles2D::get_use_fixed_seed() const {
return use_fixed_seed;
}
void CPUParticles2D::set_seed(uint32_t p_seed) {
seed = p_seed;
}
#ifdef TOOLS_ENABLED
void CPUParticles2D::set_show_gizmos(bool p_show_gizmos) {
if (show_gizmos == p_show_gizmos) {
return;
}
show_gizmos = p_show_gizmos;
queue_redraw();
}
#endif
uint32_t CPUParticles2D::get_seed() const {
return seed;
}
void CPUParticles2D::request_particles_process(real_t p_requested_process_time) {
_requested_process_time = p_requested_process_time;
}
void CPUParticles2D::_validate_property(PropertyInfo &p_property) const {
if (p_property.name == "emitting") {
p_property.hint = one_shot ? PROPERTY_HINT_ONESHOT : PROPERTY_HINT_NONE;
}
if (p_property.name == "emission_sphere_radius" && (emission_shape != EMISSION_SHAPE_SPHERE && emission_shape != EMISSION_SHAPE_SPHERE_SURFACE)) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if (p_property.name == "emission_rect_extents" && emission_shape != EMISSION_SHAPE_RECTANGLE) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if ((p_property.name == "emission_point_texture" || p_property.name == "emission_color_texture") && (emission_shape < EMISSION_SHAPE_POINTS)) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if (p_property.name == "emission_normals" && emission_shape != EMISSION_SHAPE_DIRECTED_POINTS) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if (p_property.name == "emission_points" && emission_shape != EMISSION_SHAPE_POINTS && emission_shape != EMISSION_SHAPE_DIRECTED_POINTS) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if (p_property.name == "emission_colors" && emission_shape != EMISSION_SHAPE_POINTS && emission_shape != EMISSION_SHAPE_DIRECTED_POINTS) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if (p_property.name.begins_with("scale_curve_") && !split_scale) {
p_property.usage = PROPERTY_USAGE_NONE;
}
if (p_property.name == "seed" && !use_fixed_seed) {
p_property.usage = PROPERTY_USAGE_NONE;
}
}
static uint32_t idhash(uint32_t x) {
x = ((x >> uint32_t(16)) ^ x) * uint32_t(0x45d9f3b);
x = ((x >> uint32_t(16)) ^ x) * uint32_t(0x45d9f3b);
x = (x >> uint32_t(16)) ^ x;
return x;
}
static real_t rand_from_seed(uint32_t &seed) {
int k;
int s = int(seed);
if (s == 0) {
s = 305420679;
}
k = s / 127773;
s = 16807 * (s - k * 127773) - 2836 * k;
if (s < 0) {
s += 2147483647;
}
seed = uint32_t(s);
return (seed % uint32_t(65536)) / 65535.0;
}
void CPUParticles2D::_update_internal() {
if (particles.is_empty() || !is_visible_in_tree()) {
_set_do_redraw(false);
return;
}
// Change update mode?
_refresh_interpolation_state();
double delta = get_process_delta_time();
if (!active && !emitting) {
set_process_internal(false);
_set_do_redraw(false);
//reset variables
time = 0;
frame_remainder = 0;
cycle = 0;
return;
}
_set_do_redraw(true);
double frame_time;
if (fixed_fps > 0) {
frame_time = 1.0 / fixed_fps;
} else {
frame_time = 1.0 / 30.0;
}
double todo = _requested_process_time;
_requested_process_time = 0;
if (time == 0 && pre_process_time > 0.0) {
todo += pre_process_time;
}
real_t tmp_speed = speed_scale;
speed_scale = 1.0;
while (todo > 0) {
_particles_process(frame_time);
todo -= frame_time;
}
speed_scale = tmp_speed;
todo = 0.0;
if (fixed_fps > 0) {
double decr = frame_time;
double ldelta = delta;
if (ldelta > 0.1) { //avoid recursive stalls if fps goes below 10
ldelta = 0.1;
} else if (ldelta <= 0.0) { //unlikely but..
ldelta = 0.001;
}
todo = frame_remainder + ldelta;
while (todo >= frame_time) {
_particles_process(frame_time);
todo -= decr;
}
frame_remainder = todo;
} else {
_particles_process(delta);
}
_update_particle_data_buffer();
}
void CPUParticles2D::_particles_process(double p_delta) {
p_delta *= speed_scale;
int pcount = particles.size();
Particle *w = particles.ptrw();
Particle *parray = w;
double prev_time = time;
time += p_delta;
if (time > lifetime) {
time = Math::fmod(time, lifetime);
cycle++;
if (one_shot && cycle > 0) {
set_emitting(false);
notify_property_list_changed();
}
}
Transform2D emission_xform;
Transform2D velocity_xform;
if (!local_coords) {
if (!_interpolation_data.interpolated_follow) {
emission_xform = get_global_transform();
} else {
TransformInterpolator::interpolate_transform_2d(_interpolation_data.global_xform_prev, _interpolation_data.global_xform_curr, emission_xform, Engine::get_singleton()->get_physics_interpolation_fraction());
}
velocity_xform = emission_xform;
velocity_xform[2] = Vector2();
}
double system_phase = time / lifetime;
bool should_be_active = false;
for (int i = 0; i < pcount; i++) {
Particle &p = parray[i];
if (!emitting && !p.active) {
continue;
}
double local_delta = p_delta;
// The phase is a ratio between 0 (birth) and 1 (end of life) for each particle.
// While we use time in tests later on, for randomness we use the phase as done in the
// original shader code, and we later multiply by lifetime to get the time.
double restart_phase = double(i) / double(pcount);
if (randomness_ratio > 0.0) {
uint32_t _seed = cycle;
if (restart_phase >= system_phase) {
_seed -= uint32_t(1);
}
_seed *= uint32_t(pcount);
_seed += uint32_t(i);
double random = double(idhash(_seed) % uint32_t(65536)) / 65536.0;
restart_phase += randomness_ratio * random * 1.0 / double(pcount);
}
restart_phase *= (1.0 - explosiveness_ratio);
double restart_time = restart_phase * lifetime;
bool restart = false;
if (time > prev_time) {
// restart_time >= prev_time is used so particles emit in the first frame they are processed
if (restart_time >= prev_time && restart_time < time) {
restart = true;
if (fractional_delta) {
local_delta = time - restart_time;
}
}
} else if (local_delta > 0.0) {
if (restart_time >= prev_time) {
restart = true;
if (fractional_delta) {
local_delta = lifetime - restart_time + time;
}
} else if (restart_time < time) {
restart = true;
if (fractional_delta) {
local_delta = time - restart_time;
}
}
}
if (p.time * (1.0 - explosiveness_ratio) > p.lifetime) {
restart = true;
}
float tv = 0.0;
if (restart) {
if (!emitting) {
p.active = false;
continue;
}
p.active = true;
/*real_t tex_linear_velocity = 0;
if (curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY].is_valid()) {
tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(0);
}*/
real_t tex_angle = 1.0;
if (curve_parameters[PARAM_ANGLE].is_valid()) {
tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
}
real_t tex_anim_offset = 1.0;
if (curve_parameters[PARAM_ANGLE].is_valid()) {
tex_anim_offset = curve_parameters[PARAM_ANGLE]->sample(tv);
}
p.seed = seed + uint32_t(i) + i + cycle;
rng->set_seed(p.seed);
p.angle_rand = rng->randf();
p.scale_rand = rng->randf();
p.hue_rot_rand = rng->randf();
p.anim_offset_rand = rng->randf();
if (color_initial_ramp.is_valid()) {
p.start_color_rand = color_initial_ramp->get_color_at_offset(rng->randf());
} else {
p.start_color_rand = Color(1, 1, 1, 1);
}
real_t angle1_rad = direction.angle() + Math::deg_to_rad((rng->randf() * 2.0 - 1.0) * spread);
Vector2 rot = Vector2(Math::cos(angle1_rad), Math::sin(angle1_rad));
p.velocity = rot * Math::lerp(parameters_min[PARAM_INITIAL_LINEAR_VELOCITY], parameters_max[PARAM_INITIAL_LINEAR_VELOCITY], rng->randf());
real_t base_angle = tex_angle * Math::lerp(parameters_min[PARAM_ANGLE], parameters_max[PARAM_ANGLE], p.angle_rand);
p.rotation = Math::deg_to_rad(base_angle);
p.custom[0] = 0.0; // unused
p.custom[1] = 0.0; // phase [0..1]
p.custom[2] = tex_anim_offset * Math::lerp(parameters_min[PARAM_ANIM_OFFSET], parameters_max[PARAM_ANIM_OFFSET], p.anim_offset_rand);
p.custom[3] = (1.0 - rng->randf() * lifetime_randomness);
p.transform = Transform2D();
p.time = 0;
p.lifetime = lifetime * p.custom[3];
p.base_color = Color(1, 1, 1, 1);
switch (emission_shape) {
case EMISSION_SHAPE_POINT: {
//do none
} break;
case EMISSION_SHAPE_SPHERE: {
real_t t = Math_TAU * rng->randf();
real_t radius = emission_sphere_radius * rng->randf();
p.transform[2] = Vector2(Math::cos(t), Math::sin(t)) * radius;
} break;
case EMISSION_SHAPE_SPHERE_SURFACE: {
real_t s = rng->randf(), t = Math_TAU * rng->randf();
real_t radius = emission_sphere_radius * Math::sqrt(1.0 - s * s);
p.transform[2] = Vector2(Math::cos(t), Math::sin(t)) * radius;
} break;
case EMISSION_SHAPE_RECTANGLE: {
p.transform[2] = Vector2(rng->randf() * 2.0 - 1.0, rng->randf() * 2.0 - 1.0) * emission_rect_extents;
} break;
case EMISSION_SHAPE_POINTS:
case EMISSION_SHAPE_DIRECTED_POINTS: {
int pc = emission_points.size();
if (pc == 0) {
break;
}
int random_idx = Math::rand() % pc;
p.transform[2] = emission_points.get(random_idx);
if (emission_shape == EMISSION_SHAPE_DIRECTED_POINTS && emission_normals.size() == pc) {
Vector2 normal = emission_normals.get(random_idx);
Transform2D m2;
m2.columns[0] = normal;
m2.columns[1] = normal.orthogonal();
p.velocity = m2.basis_xform(p.velocity);
}
if (emission_colors.size() == pc) {
p.base_color = emission_colors.get(random_idx);
}
} break;
case EMISSION_SHAPE_MAX: { // Max value for validity check.
break;
}
}
if (!local_coords) {
p.velocity = velocity_xform.xform(p.velocity);
p.transform = emission_xform * p.transform;
}
} else if (!p.active) {
continue;
} else if (p.time > p.lifetime) {
p.active = false;
tv = 1.0;
} else {
uint32_t _seed = p.seed;
p.time += local_delta;
p.custom[1] = p.time / lifetime;
tv = p.time / p.lifetime;
real_t tex_linear_velocity = 1.0;
if (curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY].is_valid()) {
tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(tv);
}
real_t tex_orbit_velocity = 1.0;
if (curve_parameters[PARAM_ORBIT_VELOCITY].is_valid()) {
tex_orbit_velocity = curve_parameters[PARAM_ORBIT_VELOCITY]->sample(tv);
}
real_t tex_angular_velocity = 1.0;
if (curve_parameters[PARAM_ANGULAR_VELOCITY].is_valid()) {
tex_angular_velocity = curve_parameters[PARAM_ANGULAR_VELOCITY]->sample(tv);
}
real_t tex_linear_accel = 1.0;
if (curve_parameters[PARAM_LINEAR_ACCEL].is_valid()) {
tex_linear_accel = curve_parameters[PARAM_LINEAR_ACCEL]->sample(tv);
}
real_t tex_tangential_accel = 1.0;
if (curve_parameters[PARAM_TANGENTIAL_ACCEL].is_valid()) {
tex_tangential_accel = curve_parameters[PARAM_TANGENTIAL_ACCEL]->sample(tv);
}
real_t tex_radial_accel = 1.0;
if (curve_parameters[PARAM_RADIAL_ACCEL].is_valid()) {
tex_radial_accel = curve_parameters[PARAM_RADIAL_ACCEL]->sample(tv);
}
real_t tex_damping = 1.0;
if (curve_parameters[PARAM_DAMPING].is_valid()) {
tex_damping = curve_parameters[PARAM_DAMPING]->sample(tv);
}
real_t tex_angle = 1.0;
if (curve_parameters[PARAM_ANGLE].is_valid()) {
tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
}
real_t tex_anim_speed = 1.0;
if (curve_parameters[PARAM_ANIM_SPEED].is_valid()) {
tex_anim_speed = curve_parameters[PARAM_ANIM_SPEED]->sample(tv);
}
real_t tex_anim_offset = 1.0;
if (curve_parameters[PARAM_ANIM_OFFSET].is_valid()) {
tex_anim_offset = curve_parameters[PARAM_ANIM_OFFSET]->sample(tv);
}
Vector2 force = gravity;
Vector2 pos = p.transform[2];