/* === S Y N F I G ========================================================= */
/*! \file plant.cpp
** \brief Implementation of the "Plant" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2007, 2008 Chris Moore
** Copyright (c) 2011 Carlos López
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
** \endlegal
*/
/* ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <synfig/localization.h>
#include <synfig/general.h>
#include <synfig/angle.h>
#include "plant.h"
#include <synfig/string.h>
#include <synfig/time.h>
#include <synfig/context.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/surface.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include <ETL/calculus>
#include <ETL/bezier>
#include <ETL/hermite>
#include <vector>
#include <time.h>
#include <synfig/valuenodes/valuenode_bline.h>
#endif
using namespace etl;
/* === M A C R O S ========================================================= */
#define SAMPLES 300
#define ROUND_END_FACTOR (4)
#define CUSP_THRESHOLD (0.15)
#define NO_LOOP_COOKIE synfig::Vector(84951305,7836658)
#define EPSILON (0.000000001)
#define CUSP_TANGENT_ADJUST (0.025)
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(Plant);
SYNFIG_LAYER_SET_NAME(Plant,"plant");
SYNFIG_LAYER_SET_LOCAL_NAME(Plant,N_("Plant"));
SYNFIG_LAYER_SET_CATEGORY(Plant,N_("Other"));
SYNFIG_LAYER_SET_VERSION(Plant,"0.2");
SYNFIG_LAYER_SET_CVS_ID(Plant,"$Id$");
/* === P R O C E D U R E S ================================================= */
/* === M E T H O D S ======================================================= */
Plant::Plant():
param_bline(ValueBase(std::vector<BLinePoint>())),
param_origin(ValueBase(Vector(0,0))),
param_gradient(ValueBase(Gradient(Color::black(), Color::white()))),
param_split_angle(ValueBase(Angle::deg(10))),
param_gravity(ValueBase(Vector(0,-0.1))),
param_velocity(ValueBase(Real(0.3))),
param_perp_velocity(ValueBase(Real(0.0))),
param_size(ValueBase(Real(0.015))),
param_size_as_alpha(ValueBase(false)),
param_reverse(ValueBase(true)),
param_step(ValueBase(Real(0.01))),
param_splits(ValueBase(int(5))),
param_sprouts(ValueBase(int(10))),
param_random_factor(ValueBase(Real(0.2))),
param_drag(ValueBase(Real(0.1))),
param_use_width(ValueBase(true)),
version(version__)
{
bounding_rect=Rect::zero();
Random random;
random.set_seed(time(NULL));
param_random.set(random.get_seed());
std::vector<BLinePoint> bline;
bline.push_back(BLinePoint());
bline.push_back(BLinePoint());
bline.push_back(BLinePoint());
bline[0].set_vertex(Point(0,1));
bline[1].set_vertex(Point(0,-1));
bline[2].set_vertex(Point(1,0));
bline[0].set_tangent(bline[1].get_vertex()-bline[2].get_vertex()*0.5f);
bline[1].set_tangent(bline[2].get_vertex()-bline[0].get_vertex()*0.5f);
bline[2].set_tangent(bline[0].get_vertex()-bline[1].get_vertex()*0.5f);
bline[0].set_width(1.0f);
bline[1].set_width(1.0f);
bline[2].set_width(1.0f);
param_bline.set_list_of(bline);
bline_loop=true;
mass=(0.5);
needs_sync_=true;
sync();
SET_INTERPOLATION_DEFAULTS();
SET_STATIC_DEFAULTS();
}
void
Plant::branch(int n,int depth,float t, float stunt_growth, synfig::Point position,synfig::Vector vel)const
{
int splits=param_splits.get(int());
Real step=param_step.get(Real());
Vector gravity=param_gravity.get(Vector());
Real drag=param_drag.get(Real());
Gradient gradient=param_gradient.get(Gradient());
Angle split_angle=param_split_angle.get(Angle());
Real random_factor=param_random_factor.get(Real());
Random random;
random.set_seed(param_random.get(int()));
float next_split((1.0-t)/(splits-depth)+t/*+random_factor*random(40+depth,t*splits,0,0)/splits*/);
for(;t<next_split;t+=step)
{
vel[0]+=gravity[0]*step;
vel[1]+=gravity[1]*step;
vel*=(1.0-(drag)*step);
position[0]+=vel[0]*step;
position[1]+=vel[1]*step;
particle_list.push_back(Particle(position, gradient(t)));
if (particle_list.size() % 1000000 == 0)
synfig::info("constructed %d million particles...", particle_list.size()/1000000);
bounding_rect.expand(position);
}
if(t>=1.0-stunt_growth)return;
synfig::Real sin_v=synfig::Angle::cos(split_angle).get();
synfig::Real cos_v=synfig::Angle::sin(split_angle).get();
synfig::Vector velocity1(vel[0]*sin_v - vel[1]*cos_v + random_factor*random(Random::SMOOTH_COSINE, 30+n+depth, t*splits, 0.0f, 0.0f),
vel[0]*cos_v + vel[1]*sin_v + random_factor*random(Random::SMOOTH_COSINE, 32+n+depth, t*splits, 0.0f, 0.0f));
synfig::Vector velocity2(vel[0]*sin_v + vel[1]*cos_v + random_factor*random(Random::SMOOTH_COSINE, 31+n+depth, t*splits, 0.0f, 0.0f),
-vel[0]*cos_v + vel[1]*sin_v + random_factor*random(Random::SMOOTH_COSINE, 33+n+depth, t*splits, 0.0f, 0.0f));
Plant::branch(n,depth+1,t,stunt_growth,position,velocity1);
Plant::branch(n,depth+1,t,stunt_growth,position,velocity2);
}
void
Plant::calc_bounding_rect()const
{
std::vector<BLinePoint> bline(param_bline.get_list_of(BLinePoint()));
Real velocity=param_velocity.get(Real());
Vector gravity=param_gravity.get(Vector());
Real size=param_size.get(Real());
std::vector<synfig::BLinePoint>::const_iterator iter,next;
bounding_rect=Rect::zero();
// Bline must have at least 2 points in it
if(bline.size()<2)
return;
next=bline.begin();
if(bline_loop)
iter=--bline.end();
else
iter=next++;
for(;next!=bline.end();iter=next++)
{
bounding_rect.expand(iter->get_vertex());
bounding_rect.expand(next->get_vertex());
bounding_rect.expand(iter->get_vertex()+iter->get_tangent2()*0.3333333333333);
bounding_rect.expand(next->get_vertex()-next->get_tangent1()*0.3333333333333);
bounding_rect.expand(next->get_vertex()+next->get_tangent2()*velocity);
}
bounding_rect.expand_x(gravity[0]);
bounding_rect.expand_y(gravity[1]);
bounding_rect.expand_x(size);
bounding_rect.expand_y(size);
}
void
Plant::sync()const
{
std::vector<BLinePoint> bline(param_bline.get_list_of(BLinePoint()));
Real step_=param_step.get(Real());
Gradient gradient=param_gradient.get(Gradient());
Real random_factor=param_random_factor.get(Real());
Random random;
random.set_seed(param_random.get(int()));
int sprouts=param_sprouts.get(int());
Real velocity=param_velocity.get(Real());
Real perp_velocity=param_perp_velocity.get(Real());
int splits=param_splits.get(int());
bool use_width=param_use_width.get(bool());
std::lock_guard<std::mutex> lock(mutex);
if (!needs_sync_) return;
time_t start_time; time(&start_time);
particle_list.clear();
bounding_rect=Rect::zero();
// Bline must have at least 2 points in it
if(bline.size()<2)
{
needs_sync_=false;
return;
}
std::vector<synfig::BLinePoint>::const_iterator iter,next;
etl::hermite<Vector> curve;
Real step(abs(step_));
int seg(0);
next=bline.begin();
if(bline_loop) iter=--bline.end(); // iter is the last bline in the list; next is the first bline in the list
else iter=next++; // iter is the first bline in the list; next is the second bline in the list
// loop through the bline; seg counts the blines as we do so; stop before iter is the last bline in the list
for(;next!=bline.end();iter=next++,seg++)
{
float iterw=iter->get_width(); // the width value of the iter vertex
float nextw=next->get_width(); // the width value of the next vertex
float width; // the width at an intermediate position
curve.p1()=iter->get_vertex();
curve.t1()=iter->get_tangent2();
curve.p2()=next->get_vertex();
curve.t2()=next->get_tangent1();
curve.sync();
etl::derivative<etl::hermite<Vector> > deriv(curve);
Real f;
int i=0, branch_count = 0, steps = round_to_int(1.0/step);
if (steps < 1) steps = 1;
for(f=0.0;f<1.0;f+=step,i++)
{
Point point(curve(f));
particle_list.push_back(Particle(point, gradient(0)));
if (particle_list.size() % 1000000 == 0)
synfig::info("constructed %d million particles...", particle_list.size()/1000000);
bounding_rect.expand(point);
Real stunt_growth(random_factor * (random(Random::SMOOTH_COSINE,i,f+seg,0.0f,0.0f)/2.0+0.5));
stunt_growth*=stunt_growth;
if((((i+1)*sprouts + steps/2) / steps) > branch_count) {
Vector branch_velocity(deriv(f).norm()*velocity + deriv(f).perp().norm()*perp_velocity);
if (std::isnan(branch_velocity[0]) || std::isnan(branch_velocity[1]))
continue;
branch_velocity[0] += random_factor * random(Random::SMOOTH_COSINE, 1, f*splits, 0.0f, 0.0f);
branch_velocity[1] += random_factor * random(Random::SMOOTH_COSINE, 2, f*splits, 0.0f, 0.0f);
if (use_width)
{
width = iterw+(nextw-iterw)*f; // calculate the width based on the current position
branch_velocity[0] *= width; // scale the velocity accordingly to the current width
branch_velocity[1] *= width;
}
branch_count++;
branch(i, 0, 0, // time
stunt_growth, // stunt growth
point, branch_velocity);
}
}
}
time_t end_time; time(&end_time);
if (end_time-start_time > 4)
synfig::info("Plant::sync() constructed %d particles in %d seconds\n",
particle_list.size(), int(end_time-start_time));
needs_sync_=false;
}
bool
Plant::set_param(const String & param, const ValueBase &value)
{
IMPORT_VALUE_PLUS(param_bline,
{
bline_loop=value.get_loop();
needs_sync_=true;
return true;
});
IMPORT_VALUE_PLUS(param_random, needs_sync_=true);
IMPORT_VALUE(param_origin);
IMPORT_VALUE_PLUS(param_split_angle,needs_sync_=true);
IMPORT_VALUE_PLUS(param_gravity,needs_sync_=true);
IMPORT_VALUE_PLUS(param_gradient,needs_sync_=true);
IMPORT_VALUE_PLUS(param_velocity,needs_sync_=true);
IMPORT_VALUE_PLUS(param_perp_velocity,needs_sync_=true);
IMPORT_VALUE_PLUS(param_step,{
needs_sync_ = true;
Real step=param_step.get(Real());
if (step <= 0)
step=0.01; // user is probably clueless - give a good default
else if (step < 0.00001)
step=0.00001; // 100K should be enough for anyone
else if (step > 1)
step=1;
param_step.set(step);
});
IMPORT_VALUE_PLUS(param_splits,{
needs_sync_=true;
int splits=param_splits.get(int());
if (splits < 1)
splits = 1;
param_splits.set(splits);
});
IMPORT_VALUE_PLUS(param_sprouts,needs_sync_=true);
IMPORT_VALUE_PLUS(param_random_factor,needs_sync_=true);
IMPORT_VALUE_PLUS(param_drag,needs_sync_=true);
IMPORT_VALUE(param_size);
IMPORT_VALUE(param_size_as_alpha);
IMPORT_VALUE(param_reverse);
IMPORT_VALUE(param_use_width);
if(param=="offset")
return set_param("origin", value);
if(param=="seed")
return set_param("random", value);
return Layer_Composite::set_param(param,value);
}
ValueBase
Plant::get_param(const String& param)const
{
if(param=="seed")
return get_param("random");
EXPORT_VALUE(param_bline);
EXPORT_VALUE(param_origin);
EXPORT_VALUE(param_split_angle);
EXPORT_VALUE(param_gravity);
EXPORT_VALUE(param_velocity);
EXPORT_VALUE(param_perp_velocity);
EXPORT_VALUE(param_step);
EXPORT_VALUE(param_gradient);
EXPORT_VALUE(param_splits);
EXPORT_VALUE(param_sprouts);
EXPORT_VALUE(param_random_factor);
EXPORT_VALUE(param_drag);
EXPORT_VALUE(param_size);
EXPORT_VALUE(param_size_as_alpha);
EXPORT_VALUE(param_reverse);
EXPORT_VALUE(param_use_width);
EXPORT_VALUE(param_random);
EXPORT_NAME();
if(param=="Version" || param=="version" || param=="version__")
return version;
return Layer_Composite::get_param(param);
}
Layer::Vocab
Plant::get_param_vocab()const
{
Layer::Vocab ret(Layer_Composite::get_param_vocab());
ret.push_back(ParamDesc("bline")
.set_local_name(_("Vertices"))
.set_description(_("A list of spline points"))
.set_origin("origin")
.set_hint("width")
);
ret.push_back(ParamDesc("origin")
.set_local_name(_("Origin"))
.set_description(_("Offset for the Vertices List"))
);
ret.push_back(ParamDesc("gradient")
.set_local_name(_("Gradient"))
.set_description(_("Gradient to be used for coloring the plant"))
);
ret.push_back(ParamDesc("split_angle")
.set_local_name(_("Split Angle"))
.set_description(_("Angle by which each split deviates from its parent"))
);
ret.push_back(ParamDesc("gravity")
.set_local_name(_("Gravity"))
.set_description(_("Direction in which the shoots tend to face"))
.set_is_distance()
);
ret.push_back(ParamDesc("velocity")
.set_local_name(_("Tangential Velocity"))
.set_description(_("Amount to which shoots tend to grow along the tangent to the spline"))
);
ret.push_back(ParamDesc("perp_velocity")
.set_local_name(_("Perpendicular Velocity"))
.set_description(_("Amount to which shoots tend to grow perpendicular to the tangent to the spline"))
);
ret.push_back(ParamDesc("size")
.set_local_name(_("Stem Size"))
.set_description(_("Size of the stem"))
.set_is_distance()
);
ret.push_back(ParamDesc("size_as_alpha")
.set_local_name(_("Size As Alpha"))
.set_description(_("If enabled, the alpha channel from the gradient is multiplied by the stem size, and an alpha of 1.0 is used when rendering"))
);
ret.push_back(ParamDesc("reverse")
.set_local_name(_("Reverse"))
.set_description(_("If enabled, render the plant in the opposite direction"))
);
ret.push_back(ParamDesc("step")
.set_local_name(_("Step"))
.set_description(_("Measure of the distance between points when rendering"))
);
ret.push_back(ParamDesc("seed")
.set_local_name(_("Seed"))
.set_description(_("Used to seed the pseudo-random number generator"))
);
ret.push_back(ParamDesc("splits")
.set_local_name(_("Splits"))
.set_description(_("Maximum number of times that each sprout can sprout recursively"))
);
ret.push_back(ParamDesc("sprouts")
.set_local_name(_("Sprouts"))
.set_description(_("Number of places that growth occurs on each spline section"))
);
ret.push_back(ParamDesc("random_factor")
.set_local_name(_("Random Factor"))
.set_description(_("Used to scale down all random effects. Set to zero to disable randomness"))
);
ret.push_back(ParamDesc("drag")
.set_local_name(_("Drag"))
.set_description(_("Drag slows the growth"))
);
ret.push_back(ParamDesc("use_width")
.set_local_name(_("Use Width"))
.set_description(_("Scale the velocity by the spline's width"))
);
return ret;
}
bool
Plant::set_version(const String &ver)
{
version = ver;
if (version == "0.1")
param_use_width.set(false);
return true;
}
bool
Plant::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
RENDER_TRANSFORMED_IF_NEED(__FILE__, __LINE__)
bool ret(context.accelerated_render(surface,quality,renddesc,cb));
if(is_disabled() || !ret)
return ret;
if(needs_sync_==true)
sync();
Surface dest_surface;
dest_surface.set_wh(surface->get_w(),surface->get_h());
dest_surface.clear();
// Here is where drawing occurs
draw_particles(&dest_surface, renddesc);
Surface::alpha_pen pen(surface->get_pen(0,0),get_amount(),get_blend_method());
dest_surface.blit_to(pen);
return true;
}
///
bool
Plant::accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
bool ret(context.accelerated_cairorender(cr,quality,renddesc,cb));
if(is_disabled() || !ret)
return ret;
if(needs_sync_==true)
sync();
cairo_save(cr);
cairo_push_group(cr);
// Here is where drawing occurs
draw_particles(cr);
cairo_pop_group_to_source(cr);
// blend the painted particles on the cr
cairo_paint_with_alpha_operator(cr, get_amount(), get_blend_method());
cairo_restore(cr);
return true;
}
void
Plant::draw_particles(Surface *dest_surface, const RendDesc &renddesc)const
{
Point origin=param_origin.get(Vector());
Real size=param_size.get(Real());
bool reverse=param_reverse.get(bool());
bool size_as_alpha=param_size_as_alpha.get(bool());
const Point tl(renddesc.get_tl()-origin);
const Point br(renddesc.get_br()-origin);
const int w(renddesc.get_w());
const int h(renddesc.get_h());
const int surface_width(dest_surface->get_w());
const int surface_height(dest_surface->get_h());
// Width and Height of a pixel
const Real pw = (br[0] - tl[0]) / w;
const Real ph = (br[1] - tl[1]) / h;
if (std::isinf(pw) || std::isinf(ph))
return;
if (particle_list.begin() != particle_list.end())
{
std::vector<Particle>::iterator iter;
Particle *particle;
float radius(size*sqrt(1.0f/(abs(pw)*abs(ph))));
int x1,y1,x2,y2;
if (reverse) iter = particle_list.end();
else iter = particle_list.begin();
while (true)
{
if (reverse) particle = &(*(iter-1));
else particle = &(*iter);
float scaled_radius(radius);
Color color(particle->color);
if(size_as_alpha)
{
scaled_radius*=color.get_a();
color.set_a(1);
}
// previously, radius was multiplied by sqrt(step)*12 only if
// the radius came out at less than 1 (pixel):
// if (radius<=1.0f) radius*=sqrt(step)*12.0f;
// seems a little arbitrary - does it help?
// calculate the box that this particle will be drawn as
float x1f=(particle->point[0]-tl[0])/pw-(scaled_radius*0.5);
float x2f=(particle->point[0]-tl[0])/pw+(scaled_radius*0.5);
float y1f=(particle->point[1]-tl[1])/ph-(scaled_radius*0.5);
float y2f=(particle->point[1]-tl[1])/ph+(scaled_radius*0.5);
x1=ceil_to_int(x1f);
x2=ceil_to_int(x2f)-1;
y1=ceil_to_int(y1f);
y2=ceil_to_int(y2f)-1;
// if the box isn't entirely off the canvas, draw it
if(x1<=surface_width && y1<=surface_height && x2>=0 && y2>=0)
{
float x1e=x1-x1f, x2e=x2f-x2, y1e=y1-y1f, y2e=y2f-y2;
// printf("x1e %.4f x2e %.4f y1e %.4f y2e %.4f\n", x1e, x2e, y1e, y2e);
// adjust the box so it's entirely on the canvas
if(x1<=0) { x1=0; x1e=0; }
if(y1<=0) { y1=0; y1e=0; }
if(x2>=surface_width) { x2=surface_width; x2e=0; }
if(y2>=surface_height) { y2=surface_height; y2e=0; }
int w(x2-x1), h(y2-y1);
Surface::alpha_pen surface_pen(dest_surface->get_pen(x1,y1),1.0f);
if(w>0 && h>0)
dest_surface->fill(color,surface_pen,w,h);
/* the rectangle doesn't cross any vertical pixel boundaries so we don't
* need to draw any top or bottom edges
*/
if(x2<x1)
{
// case 1 - a single pixel
if(y2<y1)
{
surface_pen.move_to(x2,y2);
surface_pen.set_alpha((x2f-x1f)*(y2f-y1f));
surface_pen.put_value(color);
}
// case 2 - a single vertical column of pixels
else
{
surface_pen.move_to(x2,y1-1);
if (y1e!=0) // maybe draw top pixel
{
surface_pen.set_alpha(y1e*(x2f-x1f));
surface_pen.put_value(color);
}
surface_pen.inc_y();
surface_pen.set_alpha(x2f-x1f);
for(int i=y1; i<y2; i++) // maybe draw pixels between
{
surface_pen.put_value(color);
surface_pen.inc_y();
}
if (y2e!=0) // maybe draw bottom pixel
{
surface_pen.set_alpha(y2e*(x2f-x1f));
surface_pen.put_value(color);
}
}
}
else
{
// case 3 - a single horizontal row of pixels
if(y2<y1)
{
surface_pen.move_to(x1-1,y2);
if (x1e!=0) // maybe draw left pixel
{
surface_pen.set_alpha(x1e*(y2f-y1f));
surface_pen.put_value(color);
}
surface_pen.inc_x();
surface_pen.set_alpha(y2f-y1f);
for(int i=x1; i<x2; i++) // maybe draw pixels between
{
surface_pen.put_value(color);
surface_pen.inc_x();
}
if (x2e!=0) // maybe draw right pixel
{
surface_pen.set_alpha(x2e*(y2f-y1f));
surface_pen.put_value(color);
}
}
// case 4 - a proper block of pixels
else
{
if (x1e!=0) // maybe draw left edge
{
surface_pen.move_to(x1-1,y1-1);
if (y1e!=0) // maybe draw top left pixel
{
surface_pen.set_alpha(x1e*y1e);
surface_pen.put_value(color);
}
surface_pen.inc_y();
surface_pen.set_alpha(x1e);
for(int i=y1; i<y2; i++) // maybe draw pixels along the left edge
{
surface_pen.put_value(color);
surface_pen.inc_y();
}
if (y2e!=0) // maybe draw bottom left pixel
{
surface_pen.set_alpha(x1e*y2e);
surface_pen.put_value(color);
}
surface_pen.inc_x();
}
else
surface_pen.move_to(x1,y2);
if (y2e!=0) // maybe draw bottom edge
{
surface_pen.set_alpha(y2e);
for(int i=x1; i<x2; i++) // maybe draw pixels along the bottom edge
{
surface_pen.put_value(color);
surface_pen.inc_x();
}
if (x2e!=0) // maybe draw bottom right pixel
{
surface_pen.set_alpha(x2e*y2e);
surface_pen.put_value(color);
}
surface_pen.dec_y();
}
else
surface_pen.move_to(x2,y2-1);
if (x2e!=0) // maybe draw right edge
{
surface_pen.set_alpha(x2e);
for(int i=y1; i<y2; i++) // maybe draw pixels along the right edge
{
surface_pen.put_value(color);
surface_pen.dec_y();
}
if (y1e!=0) // maybe draw top right pixel
{
surface_pen.set_alpha(x2e*y1e);
surface_pen.put_value(color);
}
surface_pen.dec_x();
}
else
surface_pen.move_to(x2-1,y1-1);
if (y1e!=0) // maybe draw top edge
{
surface_pen.set_alpha(y1e);
for(int i=x1; i<x2; i++) // maybe draw pixels along the top edge
{
surface_pen.put_value(color);
surface_pen.dec_x();
}
}
}
}
}
if (reverse)
{
if (--iter == particle_list.begin())
break;
}
else
{
if (++iter == particle_list.end())
break;
}
}
}
}
///
void
Plant::draw_particles(cairo_t *cr)const
{
Point origin=param_origin.get(Vector());
Real size=param_size.get(Real());
bool reverse=param_reverse.get(bool());
bool size_as_alpha=param_size_as_alpha.get(bool());
if (particle_list.begin() != particle_list.end())
{
std::vector<Particle>::iterator iter;
Particle *particle;
float radius(size);
if (reverse) iter = particle_list.end();
else iter = particle_list.begin();
while (true)
{
if (reverse) particle = &(*(iter-1));
else particle = &(*iter);
float scaled_radius(radius);
Color color(particle->color);
if(size_as_alpha)
{
scaled_radius*=color.get_a();
color.set_a(1);
}
// calculate the box that this particle will be drawn as
const float x1f=particle->point[0]-scaled_radius*0.5;
const float x2f=particle->point[0]+scaled_radius*0.5;
const float y1f=particle->point[1]-scaled_radius*0.5;
const float y2f=particle->point[1]+scaled_radius*0.5;
const double width (x2f-x1f);
const double height(y2f-y1f);
// grab the color components
const float r=color.clamped().get_r();
const float g=color.clamped().get_g();
const float b=color.clamped().get_b();
const float a=color.clamped().get_a();
cairo_save(cr);
cairo_set_source_rgb(cr, r, g, b);
cairo_translate(cr, origin[0], origin[1]);
cairo_rectangle(cr, x1f, y1f, width, height);
cairo_clip(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint_with_alpha(cr, a);
cairo_restore(cr);
if (reverse)
{
if (--iter == particle_list.begin())
break;
}
else
{
if (++iter == particle_list.end())
break;
}
}
}
}
Rect
Plant::get_bounding_rect(Context context)const
{
if(needs_sync_==true)
sync();
if(is_disabled())
return Rect::zero();
if(Color::is_onto(get_blend_method()))
return context.get_full_bounding_rect() & bounding_rect;
//if(get_blend_method()==Color::BLEND_BEHIND)
// return context.get_full_bounding_rect() | bounding_rect;
return bounding_rect;
}