jv.objectGui

Class PsScanline

java.lang.Object

jv.objectGui.PsScanline

public class PsScanline
extends java.lang.Object

Utility class with rasterization algorithms on pixel images.

Since:

JavaView 2.80.001

Author:

Eike Preuss, Konrad Polthier

Version:

06.06.03, 2.00 revised (kp) Extracted from subset of jvx.numeric.PnLIC.
01.01.03, 1.00 created (ep) Original code in jvx.numeric.PnLIC.

Field Summary

Fields

Modifier and Type	Field and Description
float[][]	m_aAnteile Barycentric coordinates of heads of scanlines, e.g. for interpolation of scalar values at vertices.
float[][]	m_eAnteile Barycentric coordinates of heads of scanlines, e.g. for interpolation of scalar values at vertices.
int	m_length Number of scanlines.
int[]	m_xa X-coordinates of scanlines. xa: head, xe: tail, both inclusive.
int[]	m_xe X-coordinates of scanlines. xa: head, xe: tail, both inclusive.
int	m_ymin Y-coordinate of first scanlines, next scanlines are m_ymin+1 etc.

Constructor Summary

Constructors

Constructor and Description
PsScanline()

Method Summary

Modifier and Type	Method and Description
void	makeScanlines(int x0, int y0, int x1, int y1, int x2, int y2) A triangle in pixel space is digitized in a set of horizontal scanlines.

Methods inherited from class java.lang.Object

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

Field Detail

m_xa

public int[] m_xa

X-coordinates of scanlines. xa: head, xe: tail, both inclusive. xa[i] is the beginning of i-th scanline from top.

m_xe

public int[] m_xe

X-coordinates of scanlines. xa: head, xe: tail, both inclusive. xa[i] is the beginning of i-th scanline from top.

m_aAnteile

public float[][] m_aAnteile

Barycentric coordinates of heads of scanlines, e.g. for interpolation of scalar values at vertices. float[3][>=#scanlines].

m_eAnteile

public float[][] m_eAnteile

Barycentric coordinates of heads of scanlines, e.g. for interpolation of scalar values at vertices. float[3][>=#scanlines].

m_length

public int m_length

Number of scanlines.

m_ymin

public int m_ymin

Y-coordinate of first scanlines, next scanlines are m_ymin+1 etc.

Constructor Detail

PsScanline

public PsScanline()

Method Detail

makeScanlines

public void makeScanlines(int x0,
                          int y0,
                          int x1,
                          int y1,
                          int x2,
                          int y2)

A triangle in pixel space is digitized in a set of horizontal scanlines. The computed end points of all scanlines are assigned to this raster object.

Parameters:

x0 - x-pixel coordinate of first vertex of a triangle.

y0 - y-pixel coordinate of first vertex of a triangle.

x1 - x-pixel coordinate of second vertex of a triangle.

y1 - y-pixel coordinate of second vertex of a triangle.

x2 - x-pixel coordinate of third vertex of a triangle.

y2 - y-pixel coordinate of third vertex of a triangle.

Since:

JavaView 2.48.005

Author:

Eike Preuss

Version:

24.06.03, 1.20 revised (kp) This method moved to PsScanline from jvx.numeric.PnLIC.
06.06.03, 1.10 revised (kp) Method ScannedData#setSize() implemented.
01.01.03, 1.00 created (ep)