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BananaPuncher714
2025-05-02 00:29:08 -04:00
commit a1899a52b7
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src/main/java/com/aaaaahhhhhhh/bananapuncher714/minietest/MeshTest.java Normal file
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package com.aaaaahhhhhhh.bananapuncher714.minietest;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.bukkit.util.Vector;
import com.aaaaahhhhhhh.bananapuncher714.minietest.objects.ChunkLocation;
import com.aaaaahhhhhhh.bananapuncher714.minietest.objects.mesh.Facet;
import com.aaaaahhhhhhh.bananapuncher714.minietest.objects.mesh.MeshBuilder;
import com.aaaaahhhhhhh.bananapuncher714.minietest.objects.mesh.Plane;
public class MeshTest {
private static final File BASE = new File( System.getProperty( "user.dir" ) );
private static final File CHUNK_DIR = new File( BASE, "chunks" );
public static void main( String[] args ) {
if ( CHUNK_DIR.exists() && CHUNK_DIR.isDirectory() ) {
System.out.println( "Found " + CHUNK_DIR.list().length + " files" );
for ( File file : CHUNK_DIR.listFiles() ) {
doStuff( file );
break;
}
} else {
System.err.println( "No such directory exists: " + CHUNK_DIR );
}
}
private static void doStuff( File file ) {
String name = file.getName();
String[] split = name.split( "," );
ChunkLocation location = new ChunkLocation( split[ 0 ], Integer.parseInt( split[ 1 ] ), Integer.parseInt( split[ 2 ] ) );
System.out.println( "Parsing chunk " + location );
// First parse the file to get a list of all bounding boxes that we can use
List< AABB > boxes = new ArrayList< AABB >();
try ( BufferedReader reader = new BufferedReader( new FileReader( file ) ) ) {
String line;
while ( ( line = reader.readLine() ) != null ) {
if ( !line.isEmpty() ) {
String[] values = line.split( "," );
double minX = Double.parseDouble( values[ 0 ] );
double minY = Double.parseDouble( values[ 1 ] );
double minZ = Double.parseDouble( values[ 2 ] );
double maxX = Double.parseDouble( values[ 3 ] );
double maxY = Double.parseDouble( values[ 4 ] );
double maxZ = Double.parseDouble( values[ 5 ] );
boxes.add( new AABB( minX, minY, minZ, maxX, maxY, maxZ ) );
}
}
} catch ( FileNotFoundException e ) {
e.printStackTrace();
return;
} catch ( IOException e ) {
e.printStackTrace();
return;
}
System.out.println( "Found " + boxes.size() + " boxes" );
// Now that we have a bunch of bounding boxes, do whatever
MeshBuilder builder = new MeshBuilder();
int i = 0;
for ( AABB box : boxes ) {
for ( Facet facet : generateFacetsFor( box ) ) {
builder.addFacet( facet );
}
}
System.out.println( "Planes: " + builder.planes.size() );
for ( Plane plane : builder.planes ) {
System.out.println( "Plane" );
System.out.println( "Norm:\t" + plane.normal );
System.out.println( "Ref:\t" + plane.point );
System.out.println( "Size:\t" + plane.polygons.size() );
}
/*
* The general plan is as follows:
* - Create a new mesh object
* - Insert faces one by one until we have all the shapes we want
* - In this case, it happens to be perfect AABB
* - Process the faces
* - Sort them into their correct plane of existence, along with their normal
* - In this case, their unique plane can be defined by their normal, and a point
* - Use the first point of the polygon to compare
* - Use the smallest point we can find as the reference point
* - O(1) operation per face, I suppose
* - Need to check point and normal with tolerance which is why
* - Now that we have faces each in their assorted group, we can start to tessellate each one
* - Generate even/odd regions and remove any colinear edges
* - Save this as the pre-mesh
* - Now trianglate each group and put that into a mesh collision shape or gimpact shape or whatnot
* - Use an IndexedMesh with the two array constructor
* - Put into game and test
*/
}
private static List< Facet > generateFacetsFor( AABB box ) {
List< Facet > facets = new ArrayList< Facet >();
Vector p1 = new Vector( box.xmin, box.ymin, box.zmin );
Vector p2 = new Vector( box.xmin, box.ymin, box.zmax );
Vector p3 = new Vector( box.xmin, box.ymax, box.zmin );
Vector p4 = new Vector( box.xmin, box.ymax, box.zmax );
Vector p5 = new Vector( box.xmax, box.ymin, box.zmin );
Vector p6 = new Vector( box.xmax, box.ymin, box.zmax );
Vector p7 = new Vector( box.xmax, box.ymax, box.zmin );
Vector p8 = new Vector( box.xmax, box.ymax, box.zmax );
{
Facet facet = new Facet();
facet.points.add( p1 );
facet.points.add( p2 );
facet.points.add( p4 );
facet.points.add( p3 );
facet.normal = new Vector( -1, 0, 0 );
facets.add( facet );
}
{
Facet facet = new Facet();
facet.points.add( p5 );
facet.points.add( p6 );
facet.points.add( p8 );
facet.points.add( p7 );
facet.normal = new Vector( 1, 0, 0 );
facets.add( facet );
}
{
Facet facet = new Facet();
facet.points.add( p1 );
facet.points.add( p2 );
facet.points.add( p6 );
facet.points.add( p5 );
facet.normal = new Vector( 0, -1, 0 );
facets.add( facet );
}
{
Facet facet = new Facet();
facet.points.add( p3 );
facet.points.add( p4 );
facet.points.add( p7 );
facet.points.add( p8 );
facet.normal = new Vector( 0, 1, 0 );
facets.add( facet );
}
{
Facet facet = new Facet();
facet.points.add( p1 );
facet.points.add( p3 );
facet.points.add( p7 );
facet.points.add( p5 );
facet.normal = new Vector( 0, 0, -1 );
facets.add( facet );
}
{
Facet facet = new Facet();
facet.points.add( p2 );
facet.points.add( p4 );
facet.points.add( p8 );
facet.points.add( p6 );
facet.normal = new Vector( 0, 0, 1 );
facets.add( facet );
}
return facets;
}
static class AABB {
double xmin, ymin, zmin;
double xmax, ymax, zmax;
AABB( double xmin, double ymin, double zmin, double xmax, double ymax, double zmax ) {
this.xmin = xmin;
this.ymax = ymin;
this.zmin = zmin;
this.xmax = xmax;
this.ymax = ymax;
this.zmax = zmax;
}
}
}