Package eu.svjatoslav.sixth.e3d.renderer.raster.slicer

Class Slicer

java.lang.Object

eu.svjatoslav.sixth.e3d.renderer.raster.slicer.Slicer

public class Slicer
extends Object

Recursively subdivides textured polygons into smaller triangles for perspective-correct rendering and level-of-detail management.

When a textured polygon covers a large area of the screen, rendering it as a single triangle can produce visible texture distortion due to affine (non-perspective) texture interpolation. The Slicer addresses this by recursively splitting triangles along their longest edge until no edge exceeds maxDistance.

The subdivision algorithm works as follows:

1. For a given triangle, compute the lengths of all three edges.
2. Sort edges by length and find the longest one.
3. If the longest edge is shorter than maxDistance, emit the triangle as-is.
4. Otherwise, split the longest edge at its midpoint (interpolating both 3D and texture coordinates) and recurse on the two resulting sub-triangles.

This class is used by AbstractCompositeShape to break large composite shapes into appropriately-sized sub-polygons.

See Also:

• BorderLine
• TexturedPolygon

Constructor Summary

Constructors

Constructor	Description
Slicer(double maxDistance)	Creates a new slicer with the specified maximum edge length.

Method Summary

Modifier and Type	Method	Description
List<TexturedPolygon>	getResult()	Returns the list of subdivided polygons produced by the slicing process.
void	slice(TexturedPolygon originalPolygon)	Slices the given textured polygon into smaller triangles.

Methods inherited from class java.lang.Object

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

Constructor Details

Slicer

public Slicer(double maxDistance)

Creates a new slicer with the specified maximum edge length.

Parameters:

maxDistance - the maximum allowed edge length in world-space units; edges longer than this will be subdivided

Method Details

getResult

public List<TexturedPolygon> getResult()

Returns the list of subdivided polygons produced by the slicing process.

Returns:

an unmodifiable view of the resulting TexturedPolygon list

slice

public void slice(TexturedPolygon originalPolygon)

Slices the given textured polygon into smaller triangles.

After calling this method, retrieve the resulting sub-polygons via getResult(). The original polygon's texture reference and mouse interaction controller are preserved on all sub-polygons.

Parameters:

originalPolygon - the polygon to subdivide