4b561b6e90
Updated the configure script for *BSD and GCC 2.95 (-fno-exceptions) Added install rule to documentation directory. Dumped old packages directory; added traditional RPM spec file and EPM list file (that replace all of the packages stuff) The FLUID man page is now "fluid.1" for the formatted page and "fluid.man" for the non-formatted page, since only IRIX uses pack'd formatted man pages. Whew! git-svn-id: file:///fltk/svn/fltk/branches/branch-1.0@1090 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
202 lines
5.1 KiB
C++
202 lines
5.1 KiB
C++
//
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// "$Id: mandelbrot.cxx,v 1.8.2.1 2000/04/25 22:16:57 mike Exp $"
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//
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// Mandelbrot set demo for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2000 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@easysw.com".
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//
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#include "mandelbrot_ui.cxx"
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#include <FL/fl_draw.H>
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#include <stdio.h>
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#include <stdlib.h>
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Drawing_Window mbrot;
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Drawing_Window jbrot;
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void idle() {
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if (!mbrot.d->idle() && !(jbrot.d && jbrot.d->idle())) Fl::set_idle(0);
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}
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void set_idle() {
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Fl::set_idle(idle);
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}
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static void window_callback(Fl_Widget*, void*) {exit(0);}
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int main(int argc, char **argv) {
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mbrot.make_window();
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mbrot.d->X = -.75;
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mbrot.d->scale = 2.5;
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mbrot.update_label();
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int i = 0;
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if (Fl::args(argc,argv,i) < argc) Fl::fatal(Fl::help);
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Fl::visual(FL_RGB);
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mbrot.window->callback(window_callback);
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mbrot.window->show(argc,argv);
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Fl::run();
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return 0;
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}
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void Drawing_Window::update_label() {
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char buffer[128];
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sprintf(buffer, "%+.10f", d->X); x_input->value(buffer);
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sprintf(buffer, "%+.10f", d->Y); y_input->value(buffer);
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sprintf(buffer, "%.2g", d->scale); w_input->value(buffer);
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}
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void Drawing_Area::draw() {
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draw_box();
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drawn = 0;
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set_idle();
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}
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int Drawing_Area::idle() {
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if (!window()->visible()) return 0;
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if (drawn < nextline) {
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window()->make_current();
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int yy = drawn+y()+4;
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if (yy >= sy && yy <= sy+sh) erase_box();
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fl_draw_image_mono(buffer+drawn*W,x()+3,yy,W,1,1,W);
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drawn++;
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return 1;
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}
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if (nextline < H) {
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if (!buffer) buffer = new uchar[W*H];
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double yy = Y+(H/2-nextline)*scale/W;
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double yi = yy; if (julia) yy = jY;
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uchar *p = buffer+nextline*W;
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for (int xi = 0; xi < W; xi++) {
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double xx = X+(xi-W/2)*scale/W;
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double wx = xx; double wy = yi;
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if (julia) xx = jX;
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for (int i=0; ; i++) {
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if (i >= iterations) {*p = 0; break;}
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double t = wx*wx - wy*wy + xx;
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wy = 2*wx*wy + yy;
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wx = t;
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if (wx*wx + wy*wy > 4) {
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wx = t = 1-double(i)/(1<<10);
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if (t <= 0) t = 0; else for (i=brightness; i--;) t*=wx;
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*p = 255-int(254*t);
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break;
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}
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}
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p++;
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}
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nextline++;
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return nextline < H;
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}
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return 0;
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}
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void Drawing_Area::erase_box() {
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window()->make_current();
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fl_overlay_clear();
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}
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int Drawing_Area::handle(int event) {
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static int ix, iy;
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static int dragged;
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static int button;
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int x2,y2;
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switch (event) {
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case FL_PUSH:
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erase_box();
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ix = Fl::event_x(); if (ix<x()) ix=x(); if (ix>=x()+w()) ix=x()+w()-1;
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iy = Fl::event_y(); if (iy<y()) iy=y(); if (iy>=y()+h()) iy=y()+h()-1;
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dragged = 0;
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button = Fl::event_button();
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return 1;
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case FL_DRAG:
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dragged = 1;
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erase_box();
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x2 = Fl::event_x(); if (x2<x()) x2=x(); if (x2>=x()+w()) x2=x()+w()-1;
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y2 = Fl::event_y(); if (y2<y()) y2=y(); if (y2>=y()+h()) y2=y()+h()-1;
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if (button != 1) {ix = x2; iy = y2; return 1;}
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if (ix < x2) {sx = ix; sw = x2-ix;} else {sx = x2; sw = ix-x2;}
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if (iy < y2) {sy = iy; sh = y2-iy;} else {sy = y2; sh = iy-y2;}
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window()->make_current();
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fl_overlay_rect(sx,sy,sw,sh);
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return 1;
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case FL_RELEASE:
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if (button == 1) {
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erase_box();
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if (dragged && sw > 3 && sh > 3) {
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X = X + (sx+sw/2-x()-W/2)*scale/W;
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Y = Y + (-sy-sh/2+y()+H/2)*scale/W;
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scale = sw*scale/W;
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} else if (!dragged) {
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scale = 2*scale;
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if (julia) {
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if (scale >= 4) {
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scale = 4;
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X = Y = 0;
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}
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} else {
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if (scale >= 2.5) {
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scale = 2.5;
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X = -.75;
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Y = 0;
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}
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}
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} else return 1;
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((Drawing_Window*)(user_data()))->update_label();
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new_display();
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} else if (!julia) {
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if (!jbrot.d) {
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jbrot.make_window();
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jbrot.d->julia = 1;
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jbrot.d->X = 0;
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jbrot.d->Y = 0;
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jbrot.d->scale = 4;
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jbrot.update_label();
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}
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jbrot.d->jX = X + (ix-x()-W/2)*scale/W;
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jbrot.d->jY = Y + (H/2-iy+y())*scale/W;
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static char buffer[128];
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sprintf(buffer, "Julia %.7f %.7f",jbrot.d->jX,jbrot.d->jY);
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jbrot.window->label(buffer);
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jbrot.window->show();
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jbrot.d->new_display();
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}
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return 1;
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}
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return 0;
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}
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void Drawing_Area::new_display() {
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drawn = nextline = 0;
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set_idle();
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}
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void Drawing_Area::resize(int X,int Y,int W,int H) {
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if (W != w() || H != h()) {
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this->W = W-6;
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this->H = H-8;
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if (buffer) {delete[] buffer; buffer = 0; new_display();}
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}
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Fl_Box::resize(X,Y,W,H);
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}
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//
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// End of "$Id: mandelbrot.cxx,v 1.8.2.1 2000/04/25 22:16:57 mike Exp $".
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//
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