// // "$Id: mandelbrot.cxx,v 1.8.2.4 2001/04/13 19:07:40 easysw Exp $" // // Mandelbrot set demo for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2001 by Bill Spitzak and others. // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library 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 // Library General Public License for more details. // // You should have received a copy of the GNU Library General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA. // // Please report all bugs and problems to "fltk-bugs@fltk.org". // #include "mandelbrot_ui.cxx" #include #include #include Drawing_Window mbrot; Drawing_Window jbrot; void idle() { if (!mbrot.d->idle() && !(jbrot.d && jbrot.d->idle())) Fl::set_idle(0); } void set_idle() { Fl::set_idle(idle); } static void window_callback(Fl_Widget*, void*) {exit(0);} int main(int argc, char **argv) { mbrot.make_window(); mbrot.d->X = -.75; mbrot.d->scale = 2.5; mbrot.update_label(); int i = 0; if (Fl::args(argc,argv,i) < argc) Fl::fatal(Fl::help); Fl::visual(FL_RGB); mbrot.window->callback(window_callback); mbrot.window->show(argc,argv); Fl::run(); return 0; } void Drawing_Window::update_label() { char buffer[128]; sprintf(buffer, "%+.10f", d->X); x_input->value(buffer); sprintf(buffer, "%+.10f", d->Y); y_input->value(buffer); sprintf(buffer, "%.2g", d->scale); w_input->value(buffer); } void Drawing_Area::draw() { draw_box(); drawn = 0; set_idle(); } int Drawing_Area::idle() { if (!window()->visible()) return 0; if (drawn < nextline) { window()->make_current(); int yy = drawn+y()+4; if (yy >= sy && yy <= sy+sh) erase_box(); fl_draw_image_mono(buffer+drawn*W,x()+3,yy,W,1,1,W); drawn++; return 1; } if (nextline < H) { if (!buffer) buffer = new uchar[W*H]; double yy = Y+(H/2-nextline)*scale/W; double yi = yy; if (julia) yy = jY; uchar *p = buffer+nextline*W; for (int xi = 0; xi < W; xi++) { double xx = X+(xi-W/2)*scale/W; double wx = xx; double wy = yi; if (julia) xx = jX; for (int i=0; ; i++) { if (i >= iterations) {*p = 0; break;} double t = wx*wx - wy*wy + xx; wy = 2*wx*wy + yy; wx = t; if (wx*wx + wy*wy > 4) { wx = t = 1-double(i)/(1<<10); if (t <= 0) t = 0; else for (i=brightness; i--;) t*=wx; *p = 255-int(254*t); break; } } p++; } nextline++; return nextline < H; } return 0; } void Drawing_Area::erase_box() { window()->make_current(); fl_overlay_clear(); } int Drawing_Area::handle(int event) { static int ix, iy; static int dragged; static int button; int x2,y2; switch (event) { case FL_PUSH: erase_box(); ix = Fl::event_x(); if (ix=x()+w()) ix=x()+w()-1; iy = Fl::event_y(); if (iy=y()+h()) iy=y()+h()-1; dragged = 0; button = Fl::event_button(); return 1; case FL_DRAG: dragged = 1; erase_box(); x2 = Fl::event_x(); if (x2=x()+w()) x2=x()+w()-1; y2 = Fl::event_y(); if (y2=y()+h()) y2=y()+h()-1; if (button != 1) {ix = x2; iy = y2; return 1;} if (ix < x2) {sx = ix; sw = x2-ix;} else {sx = x2; sw = ix-x2;} if (iy < y2) {sy = iy; sh = y2-iy;} else {sy = y2; sh = iy-y2;} window()->make_current(); fl_overlay_rect(sx,sy,sw,sh); return 1; case FL_RELEASE: if (button == 1) { erase_box(); if (dragged && sw > 3 && sh > 3) { X = X + (sx+sw/2-x()-W/2)*scale/W; Y = Y + (-sy-sh/2+y()+H/2)*scale/W; scale = sw*scale/W; } else if (!dragged) { scale = 2*scale; if (julia) { if (scale >= 4) { scale = 4; X = Y = 0; } } else { if (scale >= 2.5) { scale = 2.5; X = -.75; Y = 0; } } } else return 1; ((Drawing_Window*)(user_data()))->update_label(); new_display(); } else if (!julia) { if (!jbrot.d) { jbrot.make_window(); jbrot.d->julia = 1; jbrot.d->X = 0; jbrot.d->Y = 0; jbrot.d->scale = 4; jbrot.update_label(); } jbrot.d->jX = X + (ix-x()-W/2)*scale/W; jbrot.d->jY = Y + (H/2-iy+y())*scale/W; static char s[128]; sprintf(s, "Julia %.7f %.7f",jbrot.d->jX,jbrot.d->jY); jbrot.window->label(s); jbrot.window->show(); jbrot.d->new_display(); } return 1; } return 0; } void Drawing_Area::new_display() { drawn = nextline = 0; set_idle(); } void Drawing_Area::resize(int XX,int YY,int WW,int HH) { if (WW != w() || HH != h()) { W = WW-6; H = HH-8; if (buffer) {delete[] buffer; buffer = 0; new_display();} } Fl_Box::resize(XX,YY,WW,HH); } // // End of "$Id: mandelbrot.cxx,v 1.8.2.4 2001/04/13 19:07:40 easysw Exp $". //