Package eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line

Class Line

java.lang.Object

eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractShape

eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractCoordinateShape

eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.Line

public class Line
extends AbstractCoordinateShape

A 3D line segment with perspective-correct width and alpha blending.

This class represents a line between two 3D points, rendered with a specified width that adjusts based on perspective (distance from the viewer). The line is drawn using interpolators to handle edge cases and alpha blending for transparency effects.

The rendering algorithm: 1. For thin lines (below a threshold), draws single-pixel lines with alpha adjustment based on perspective. 2. For thicker lines, creates four interpolators to define the line's rectangular area and fills it scanline by scanline.

Note: The width is scaled by the LINE_WIDTH_MULTIPLIER and adjusted based on the distance from the viewer (z-coordinate) to maintain a consistent visual size.

Field Summary

Fields

Modifier and Type	Field	Description
Color	color	Color of the line.
final double	width	width of the line.

Fields inherited from class eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractCoordinateShape

coordinates, onScreenZ, shapeId

Fields inherited from class eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractShape

mouseInteractionController

Constructor Summary

Constructors

Constructor	Description
Line(Point3D point1, Point3D point2, Color color, double width)
Line(Line parentLine)

Method Summary

Modifier and Type	Method	Description
void	paint(RenderingContext buffer)	Paints this shape onto the rendering context's pixel buffer.

Methods inherited from class eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractCoordinateShape

getZ, transform

Methods inherited from class eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractShape

setMouseInteractionController

Methods inherited from class java.lang.Object

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

Field Details

width

public final double width

width of the line.

color

public Color color

Color of the line.

Constructor Details

Line

public Line(Line parentLine)

Line

public Line(Point3D point1,
 Point3D point2,
 Color color,
 double width)

Method Details

paint

public void paint(RenderingContext buffer)

Description copied from class: AbstractCoordinateShape

Paints this shape onto the rendering context's pixel buffer.

This method is called after all shapes have been transformed and sorted by depth. Implementations should use the transformed screen-space coordinates from Vertex.transformedCoordinate to draw pixels.

Specified by:

paint in class AbstractCoordinateShape

Parameters:

buffer - the rendering context containing the pixel buffer and graphics context