needs_sync_=true;
sync();
size_as_alpha=false;
+ reverse=true;
}
void
IMPORT_PLUS(drag,needs_sync_=true);
IMPORT(size);
IMPORT(size_as_alpha);
+ IMPORT(reverse);
return Layer_Composite::set_param(param,value);
}
EXPORT(size);
EXPORT(size_as_alpha);
+ EXPORT(reverse);
EXPORT_NAME();
EXPORT_VERSION();
.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"))
if(needs_sync_==true)
sync();
- std::vector<Particle>::reverse_iterator iter;
+ if (particle_list.begin() != particle_list.end())
+ {
+ std::vector<Particle>::iterator iter;
+ Particle *particle;
- float radius(size*sqrt(1.0f/(abs(pw)*abs(ph))));
+ 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)
- {
- float scaled_radius(radius);
- Color color(iter->color);
- if(size_as_alpha)
- {
- scaled_radius*=color.get_a();
- color.set_a(1);
- }
+ int x1,y1,x2,y2;
- // 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
+ if (reverse) iter = particle_list.end();
+ else iter = particle_list.begin();
+
+ while (true)
{
- // case 3 - a single horizontal row of pixels
- if(y2<y1)
+ if (reverse) particle = &(*(iter-1));
+ else particle = &(*iter);
+
+ float scaled_radius(radius);
+ Color color(particle->color);
+ if(size_as_alpha)
{
- 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);
- }
+ scaled_radius*=color.get_a();
+ color.set_a(1);
}
- // case 4 - a proper block of pixels
- else
+
+ // 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)
{
- if (x1e!=0) // maybe draw left edge
+ 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)
{
- surface_pen.move_to(x1-1,y1-1);
- if (y1e!=0) // maybe draw top left pixel
+ // case 1 - a single pixel
+ if(y2<y1)
{
- surface_pen.set_alpha(x1e*y1e);
+ surface_pen.move_to(x2,y2);
+ surface_pen.set_alpha((x2f-x1f)*(y2f-y1f));
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
+ // case 2 - a single vertical column of pixels
+ else
{
- surface_pen.put_value(color);
+ 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);
+ }
}
- 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
+ // case 3 - a single horizontal row of pixels
+ if(y2<y1)
{
- surface_pen.put_value(color);
+ 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);
+ }
}
- 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
+ // case 4 - a proper block of pixels
+ else
{
- surface_pen.set_alpha(x2e*y1e);
- surface_pen.put_value(color);
+ 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();
+ }
+ }
}
- 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;
}
}
}
projects / synfig.git / commitdiff