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/*
RepRap
------
The Replicating Rapid Prototyper Project
Copyright (C) 2005
Adrian Bowyer & The University of Bath
http://reprap.org
Principal author:
Adrian Bowyer
Department of Mechanical Engineering
Faculty of Engineering and Design
University of Bath
Bath BA2 7AY
U.K.
e-mail: A.Bowyer@bath.ac.uk
RepRap is free; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
Licence as published by the Free Software Foundation; either
version 2 of the Licence, or (at your option) any later version.
RepRap 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 Licence for more details.
For this purpose the words "software" and "library" in the GNU Library
General Public Licence are taken to mean any and all computer programs
computer files data results documents and other copyright information
available from the RepRap project.
You should have received a copy of the GNU Library General Public
Licence along with RepRap; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA,
or see
http://www.gnu.org/
=====================================================================
RrGraphics: Simple 2D graphics
First version 20 May 2005
This version: 1 May 2006 (Now in CVS - no more comments here)
*/
package org.reprap.geometry.polygons;
import java.awt.*;
import javax.swing.*;
public class RrGraphics
{
private final int frameWidth = 600; // Pixels
private int frameHeight;
private RrPolygonList p_list;
private RrCSGPolygon csg_p;
private double scale;
private Rr2Point p_0;
private Rr2Point pos;
private Graphics2D g2d;
private boolean plot_box;
// Constructor for point-list polygon
public RrGraphics(RrPolygonList pl, boolean pb)
{
if(pl.size() <= 0)
{
System.err.println("Attempt to plot a null polygon list!");
return;
}
p_list = pl;
csg_p = null;
plot_box = pb;
RrBox big = pl.box.scale(1.1);
double width = big.x().length();
double height = big.y().length();
frameHeight = (int)(0.5 + (frameWidth*height)/width);
double xs = (double)frameWidth/width;
double ys = (double)frameHeight/height;
if (xs < ys)
scale = xs;
else
scale = ys;
p_0 = new Rr2Point((frameWidth - (width + 2*big.x().low())*scale)*0.5,
(frameHeight - (height + 2*big.y().low())*scale)*0.5);
pos = new Rr2Point(width*0.5, height*0.5);
// Display the frame
JFrame frame = new JFrame();
frame.setSize(frameWidth, frameHeight);
frame.getContentPane().add(new MyComponent());
frame.setVisible(true);
}
// Constructor for CSG polygon
public RrGraphics(RrCSGPolygon cp, boolean pb)
{
p_list = null;
csg_p = cp;
plot_box = pb;
RrBox big = csg_p.box().scale(1.1);
double width = big.x().length();
double height = big.y().length();
frameHeight = (int)(0.5 + (frameWidth*height)/width);
double xs = (double)frameWidth/width;
double ys = (double)frameHeight/height;
if (xs < ys)
scale = xs;
else
scale = ys;
p_0 = new Rr2Point((frameWidth - (width + 2*big.x().low())*scale)*0.5,
(frameHeight - (height + 2*big.y().low())*scale)*0.5);
pos = new Rr2Point(width*0.5, height*0.5);
// Display the frame
JFrame frame = new JFrame();
frame.setSize(frameWidth, frameHeight);
frame.getContentPane().add(new MyComponent());
frame.setVisible(true);
}
// Real-world coordinates to pixels
private Rr2Point transform(Rr2Point p)
{
return new Rr2Point(p_0.x() + scale*p.x(), (double)frameHeight -
(p_0.y() + scale*p.y()));
}
// Move invisibly to a point
private void move(Rr2Point p)
{
pos = transform(p);
}
// Draw a straight line to a point
private void plot(Rr2Point p)
{
Rr2Point a = transform(p);
g2d.drawLine((int)(pos.x() + 0.5), (int)(pos.y() + 0.5),
(int)(a.x() + 0.5), (int)(a.y() + 0.5));
pos = a;
}
// Set the plotting colour
private void colour(int c)
{
switch(c)
{
case 0:
g2d.setColor(Color.white);
break;
case 1:
g2d.setColor(Color.black);
break;
case 2:
g2d.setColor(Color.red);
break;
case 3:
g2d.setColor(Color.green);
break;
case 4:
g2d.setColor(Color.blue);
break;
default:
g2d.setColor(Color.orange);
break;
}
}
// Plot a box
private void plot(RrBox b)
{
colour(4);
move(b.sw());
plot(b.nw());
plot(b.ne());
plot(b.se());
plot(b.sw());
}
// Plot a polygon
private void plot(RrPolygon p)
{
if(plot_box)
plot(p.box);
int leng = p.size();
for(int j = 0; j <= leng; j++)
{
int i = j%leng;
int f = p.flag(i);
if(f != 0 && j != 0)
{
colour(f);
plot(p.point(i));
} else
move(p.point(i));
}
}
// Plot a section of parametric line
private void plot(RrLine a, RrInterval i)
{
if(i.empty()) return;
move(a.point(i.low()));
plot(a.point(i.high()));
}
// Plot a set in a box
private void plot(RrCSG c, RrBox b)
{
if(plot_box)
plot(b);
colour(1);
switch(c.complexity())
{
case 0:
return;
// One half-plane in the box
case 1:
if(c.plane() == null)
System.err.println("plot(RrCSG, RrBox): hp not set.");
RrLine ln = new RrLine(c.plane());
RrInterval range = RrInterval.big_interval();
range = b.wipe(ln, range);
if(range.empty()) return;
plot(ln, range);
break;
// Two - maybe a corner, or they may not intersect
case 2:
RrLine ln1 = new RrLine(c.c_1().plane());
RrInterval range1 = RrInterval.big_interval();
range1 = b.wipe(ln1, range1);
RrLine ln2 = new RrLine(c.c_2().plane());
RrInterval range2 = RrInterval.big_interval();
range2 = b.wipe(ln2, range2);
if(c.operator() == RrCSGOp.INTERSECTION)
{
range2 = c.c_1().plane().wipe(ln2, range2);
range1 = c.c_2().plane().wipe(ln1, range1);
} else
{
range2 = c.c_1().plane().complement().wipe(ln2, range2);
range1 = c.c_2().plane().complement().wipe(ln1, range1);
}
plot(ln1, range1);
plot(ln2, range2);
break;
default:
System.err.println("plot(RrCSG, RrBox): complexity > 2.");
}
}
// Plot a divided CSG polygon recursively
private void plot(RrCSGPolygon p)
{
if(p.c_1() == null)
{
plot(p.csg(), p.box());
} else
{
plot(p.c_1());
plot(p.c_2());
plot(p.c_3());
plot(p.c_4());
}
}
// Master plot function - draw everything
private void plot()
{
if(p_list == null)
plot(csg_p);
else
{
int leng = p_list.size();
for(int i = 0; i < leng; i++)
plot(p_list.polygon(i));
}
}
class MyComponent extends JComponent
{
// This method is called whenever the contents needs to be painted
public void paint(Graphics g)
{
// Retrieve the graphics context; this object is used to paint shapes
g2d = (Graphics2D)g;
// Draw everything
plot();
}
}
}
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