**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
SYNFIG_LAYER_INIT(Plant);
SYNFIG_LAYER_SET_NAME(Plant,"plant");
SYNFIG_LAYER_SET_LOCAL_NAME(Plant,_("Plant"));
-SYNFIG_LAYER_SET_CATEGORY(Plant,_("Particle Systems"));
+SYNFIG_LAYER_SET_CATEGORY(Plant,_("Other"));
SYNFIG_LAYER_SET_VERSION(Plant,"0.1");
SYNFIG_LAYER_SET_CVS_ID(Plant,"$Id$");
split_angle(Angle::deg(10)),
gravity(0,-0.1),
velocity(0.3),
+ perp_velocity(0.0),
step(0.01),
sprouts(10)
{
splits=5;
drag=0.1;
size=0.015;
+ needs_sync_=true;
sync();
size_as_alpha=false;
}
position[0]+=vel[0]*step;
position[1]+=vel[1]*step;
- particle_list.push_back(Particle(
- position,
- gradient(t)
- ));
+ 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);
}
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(2,30+n+depth,t*splits,0.0f,0.0f),vel[0]*cos_v+vel[1]*sin_v+random_factor*random(2,32+n+depth,t*splits,0.0f,0.0f));
- synfig::Vector velocity2(vel[0]*sin_v+vel[1]*cos_v+random_factor*random(2,31+n+depth,t*splits,0.0f,0.0f),-vel[0]*cos_v+vel[1]*sin_v+random_factor*random(2,33+n+depth,t*splits,0.0f,0.0f));
+ 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);
bounding_rect=Rect::zero();
// Bline must have at least 2 points in it
- if(bline.size()<=2)
+ if(bline.size()<2)
return;
next=bline.begin();
void
Plant::sync()const
{
+ Mutex::Lock 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)
+ if(bline.size()<2)
+ {
+ needs_sync_=false;
return;
+ }
std::vector<synfig::BLinePoint>::const_iterator iter,next;
next=bline.begin();
- if(bline_loop)
- iter=--bline.end();
- else
- iter=next++;
+ 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++)
{
curve.p1()=iter->get_vertex();
etl::derivative<etl::hermite<Vector> > deriv(curve);
Real f;
- int i(0), b(round_to_int((1.0/step)/(float)sprouts-1));
- if(b<=0)b=1;
+
+ int i=0, branch_count = 0, steps = round_to_int(1.0/step);
for(f=0.0;f<1.0;f+=step,i++)
{
Point point(curve(f));
- particle_list.push_back(Particle(
- point,
- gradient(0)
- ));
+ 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(2,i,f+seg,0.0f,0.0f)/2.0+0.5);
+ Real stunt_growth(random_factor * (random(Random::SMOOTH_COSINE,i,f+seg,0.0f,0.0f)/2.0+0.5));
stunt_growth*=stunt_growth;
- Vector branch_velocity(deriv(f).norm()*velocity);
+ if((((i+1)*sprouts + steps/2) / steps) > branch_count) {
+ Vector branch_velocity(deriv(f).norm()*velocity + deriv(f).perp().norm()*perp_velocity);
- branch_velocity[0]+=random_factor*random(2,1,f*splits,0.0f,0.0f);
- branch_velocity[1]+=random_factor*random(2,2,f*splits,0.0f,0.0f);
+ 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(i%b==0)
- branch(
- i,
- 0,
- 0, // time
- stunt_growth, // stunt growth
- point,branch_velocity
- );
+ 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;
}
return true;
}
- if(param=="seed" && value.same_as(int()))
+ if(param=="seed" && value.same_type_as(int()))
{
random.set_seed(value.get(int()));
needs_sync_=true;
IMPORT_PLUS(gravity,needs_sync_=true);
IMPORT_PLUS(gradient,needs_sync_=true);
IMPORT_PLUS(velocity,needs_sync_=true);
+ IMPORT_PLUS(perp_velocity,needs_sync_=true);
IMPORT_PLUS(step,needs_sync_=true);
IMPORT_PLUS(splits,needs_sync_=true);
IMPORT_PLUS(sprouts,needs_sync_=true);
EXPORT(split_angle);
EXPORT(gravity);
EXPORT(velocity);
+ EXPORT(perp_velocity);
EXPORT(step);
EXPORT(gradient);
EXPORT(splits);
ret.push_back(ParamDesc("bline")
.set_local_name(_("Vertices"))
+ .set_description(_("A list of BLine Points"))
//.set_origin("offset")
//.set_scalar("width")
- .set_description(_("A list of BLine Points"))
);
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(_("Velocity"))
+ .set_local_name(_("Tangential Velocity"))
+ .set_description(_("Amount to which shoots tend to grow along the tangent to the BLine"))
+ );
+
+ 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 BLine"))
);
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(_("SizeAsAlpha"))
+ .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("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 bline 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"))
);
-
return ret;
}
const int w(renddesc.get_w());
const int h(renddesc.get_h());
+ const int surface_width(surface->get_w());
+ const int surface_height(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;
sync();
std::vector<Particle>::reverse_iterator iter;
- const float size_factor(1);
- float radius(size_factor*size*sqrt(1.0f/(abs(pw)*abs(ph))));
- if(radius>1.0f)
+ float radius(size*sqrt(1.0f/(abs(pw)*abs(ph))));
+
+ int x1,y1,x2,y2;
+ for(iter=particle_list.rbegin();iter!=particle_list.rend();++iter)
{
- radius*=1.0;
- int x1,y1,x2,y2;
- for(iter=particle_list.rbegin();iter!=particle_list.rend();++iter)
+ float scaled_radius(radius);
+ Color color(iter->color);
+ if(size_as_alpha)
{
- float radius(radius);
- Color color(iter->color);
- if(size_as_alpha)
- {
- radius*=color.get_a();
- color.set_a(1);
- }
-
- x1=ceil_to_int((iter->point[0]-tl[0])/pw-(radius*0.5));
- y1=ceil_to_int((iter->point[1]-tl[1])/ph-(radius*0.5));
- x2=x1+round_to_int(radius);
- y2=y1+round_to_int(radius);
-
- if(x1>=surface->get_w() || y1>=surface->get_h())
- continue;
-
- if(x2<0 || y2<0)
- continue;
-
- if(x2>=surface->get_w())
- x2=surface->get_w();
- if(y2>=surface->get_h())
- y2=surface->get_h();
-
- if(x1<0)
- x1=0;
- if(y1<0)
- y1=0;
-
- int w(min(round_to_int(radius),x2-x1));
- int h(min(round_to_int(radius),y2-y1));
-
- if(w<=0 || h<=0)
- continue;
-
- Surface::alpha_pen surface_pen(dest_surface.get_pen(x1,y1),1.0f);
+ 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=(iter->point[0]-tl[0])/pw-(scaled_radius*0.5);
+ float x2f=(iter->point[0]-tl[0])/pw+(scaled_radius*0.5);
+ float y1f=(iter->point[1]-tl[1])/ph-(scaled_radius*0.5);
+ float y2f=(iter->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 is entirely off the canvas, go to the next particle
+ if(x1>surface_width || y1>surface_height || x2<0 || y2<0) continue;
+
+ 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
- {
- //radius/=0.01;
- radius*=sqrt(step)*12.0f;
- int x,y;
- float a,b,c,d;
- for(iter=particle_list.rbegin();iter!=particle_list.rend();++iter)
+ else
{
- float radius(radius);
- Color color(iter->color);
- if(size_as_alpha)
+ // case 3 - a single horizontal row of pixels
+ if(y2<y1)
{
- radius*=color.get_a();
- color.set_a(1);
+ 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);
+ }
}
-
- x=floor_to_int((iter->point[0]-tl[0])/pw-0.5f);
- y=floor_to_int((iter->point[1]-tl[1])/ph-0.5f);
-
- if(x>=surface->get_w()-1 || y>=surface->get_h()-1 || x<0 || y<0)
+ // case 4 - a proper block of pixels
+ else
{
- continue;
+ 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();
+ }
+ }
}
-
- a=((iter->point[0]-tl[0])/pw-0.5f-x)*radius;
- b=((iter->point[1]-tl[1])/ph-0.5f-y)*radius;
- c=radius-a;
- d=radius-b;
-
- Surface::alpha_pen surface_pen(dest_surface.get_pen(x,y),1.0f);
-
- surface_pen.set_alpha(c*d);
- surface_pen.put_value(color);
- surface_pen.inc_x();
- surface_pen.set_alpha(a*d);
- surface_pen.put_value(color);
- surface_pen.inc_y();
- surface_pen.set_alpha(a*b);
- surface_pen.put_value(color);
- surface_pen.dec_x();
- surface_pen.set_alpha(c*b);
- surface_pen.put_value(color);
}
}
projects / synfig.git / blobdiff