SciLib.Grp
Class Graphics2D

java.lang.Object
  SciLib.Grp.Graphics2D

Direct Known Subclasses:

Graphics3D

public class Graphics2D
extends java.lang.Object

This class contains some methods to draw a 2D graphics.

Field Summary

protected static int	height
static double	Pi The constant value Pi = 3.141592
protected static int	width

Constructor Summary

Graphics2D()

Method Summary

void	box(java.awt.Graphics g, double minx, double miny, double maxx, double maxy) Plot a rectangle.
void	changeWindowSize(java.awt.Dimension d) change graphics window size
void	changeWindowSize(int w, int h) change graphics window size
void	coord(java.awt.Graphics g, double minx, double miny, double maxx, double maxy) Draw a 2D coordinate system in a frame window.
void	coord2D(java.awt.Graphics g, double minx, double miny, double maxx, double maxy) Make a 2D coordinate system without drawing it in a frame window.
void	coord2D(java.awt.Graphics g, vector xv, vector yv) Make a 2D coordinate system and plot it in a frame window.
void	coord2D(java.awt.Graphics g, vector xv, vector yv, java.lang.String specific) Make a 2D coordinate system and plot it in a frame window with a specific
void	drawLine(java.awt.Graphics g, double x1, double y1, double x2, double y2) draw a line from (x1,y1) to (x2,y2)
matrix	getView2D() Return the view matrix.
void	grid(java.awt.Graphics g, double minx, double miny, double maxx, double maxy, double oX, double oY) Draw a 2D grid coordinate system in a frame window.
void	halfGrid(java.awt.Graphics g, double minx, double miny, double maxx, double maxy, double oX, double oY) Draw a 2D halfGrid coordinate system in a frame window.
void	lineTo(java.awt.Graphics g, double x, double y) draw line from the current position to a point (x,y)
void	moveTo(double x, double y) move pen to a real position (x, y)
matrix	rotation(double theta) Make 2D rotation matrix by an angle
matrix	scale(double[] scaleVec) Make 2D scale matrix by vector scaleVec
void	screenPos(java.awt.Point p, double x, double y) Compute the position on the screen, values are stored in p
void	setView2D(double xLen, double yLen) generate 2D view matrix
void	setView2D(matrix v) generate 2D view matrix form a matrix v
matrix	translate(double[] transVec) Make 2D translation matrix by vector transVec

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

Pi

public static final double Pi

The constant value Pi = 3.141592

See Also:

Constant Field Values

width

protected static int width

height

protected static int height

Constructor Detail

Graphics2D

public Graphics2D()

Method Detail

getView2D

public matrix getView2D()

Return the view matrix.

Returns:

A matrix

setView2D

public void setView2D(double xLen,
                      double yLen)

generate 2D view matrix

Parameters:

xLen - The length of x-Axis

yLen - The length of y-Axis

setView2D

public void setView2D(matrix v)

generate 2D view matrix form a matrix v

Parameters:

v - A 3 x 3 matrix

screenPos

public void screenPos(java.awt.Point p,
                      double x,
                      double y)

Compute the position on the screen, values are stored in p

Parameters:

p - A Point object

x - The x-coordinate

y - The y-coordinate

moveTo

public void moveTo(double x,
                   double y)

move pen to a real position (x, y)

Parameters:

x - The x-coordinate

y - The y-coordinate

lineTo

public void lineTo(java.awt.Graphics g,
                   double x,
                   double y)

draw line from the current position to a point (x,y)

Parameters:

g - Graphics

x - The x-coordinate

y - The y-coordinate

changeWindowSize

public void changeWindowSize(java.awt.Dimension d)

change graphics window size

Parameters:

d - New Dimension

changeWindowSize

public void changeWindowSize(int w,
                             int h)

change graphics window size

Parameters:

w - An integer, the width

h - An integer, the height

drawLine

public void drawLine(java.awt.Graphics g,
                     double x1,
                     double y1,
                     double x2,
                     double y2)

draw a line from (x1,y1) to (x2,y2)

Parameters:

g - Graphics

x1 - The x-coordinate of the first point

y1 - The y-coordinate of the first point

x2 - The x-coordinate of the second point

y2 - The y-coordinate of the first point

box

public void box(java.awt.Graphics g,
                double minx,
                double miny,
                double maxx,
                double maxy)

Plot a rectangle.

Parameters:

g - Graphics

minx - The x-coordinate of the down-left point

miny - The y-coordinate of the down-left point

maxx - The x-coordinate of the up-right point

maxy - The y-coordinate of the up-right point

coord

public void coord(java.awt.Graphics g,
                  double minx,
                  double miny,
                  double maxx,
                  double maxy)

Draw a 2D coordinate system in a frame window.

Parameters:

g - Graphics

minx - The x-coordinate of the down-left point

miny - The y-coordinate of the down-left point

maxx - The x-coordinate of the up-right point

maxy - The y-coordinate of the up-right point

halfGrid

public void halfGrid(java.awt.Graphics g,
                     double minx,
                     double miny,
                     double maxx,
                     double maxy,
                     double oX,
                     double oY)

Draw a 2D halfGrid coordinate system in a frame window.

Parameters:

g - Graphics

minx - The x-coordinate of the down-left point

miny - The y-coordinate of the down-left point

maxx - The x-coordinate of the up-right point

maxy - The y-coordinate of the up-right point

oX - The origin x-coordinate

oY - The origin y-coordinate

grid

public void grid(java.awt.Graphics g,
                 double minx,
                 double miny,
                 double maxx,
                 double maxy,
                 double oX,
                 double oY)

Draw a 2D grid coordinate system in a frame window.

Parameters:

g - Graphics

minx - The x-coordinate of the down-left point

miny - The y-coordinate of the down-left point

maxx - The x-coordinate of the up-right point

maxy - The y-coordinate of the up-right point

oX - The origin x-coordinate

oY - The origin y-coordinate

coord2D

public void coord2D(java.awt.Graphics g,
                    double minx,
                    double miny,
                    double maxx,
                    double maxy)

Make a 2D coordinate system without drawing it in a frame window.

Parameters:

g - Graphics

minx - The x-coordinate of the down-left point

miny - The y-coordinate of the down-left point

maxx - The x-coordinate of the up-right point

maxy - The y-coordinate of the up-right point

coord2D

public void coord2D(java.awt.Graphics g,
                    vector xv,
                    vector yv)

Make a 2D coordinate system and plot it in a frame window.

Parameters:

g - Graphics

xv - A vector that contains x-coordinates

yv - A vector that contains y-coordinates

coord2D

public void coord2D(java.awt.Graphics g,
                    vector xv,
                    vector yv,
                    java.lang.String specific)

Make a 2D coordinate system and plot it in a frame window with a specific

Parameters:

g - Graphics

xv - A vector that contains x-coordinates

yv - A vector that contains y-coordinates

specific - A String that can have some values as "grid", "coord", "box" or empty

translate

public matrix translate(double[] transVec)

Make 2D translation matrix by vector transVec

Parameters:

transVec - the translate vector

scale

public matrix scale(double[] scaleVec)

Make 2D scale matrix by vector scaleVec

Parameters:

scaleVec - the scale vector

rotation

public matrix rotation(double theta)

Make 2D rotation matrix by an angle

Parameters:

theta - the rotation angle in degrees