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Objeto3D.java
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99 lines (73 loc) · 2.37 KB
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import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;
import org.joml.Vector3f;
import logic.Ponto;
public class Objeto3D {
ArrayList<ArrayList<Ponto>> faces; // vetor de faces
int nFaces; // Variavel que armazena o numero de faces do objeto
ArrayList<Ponto> normais;
public Objeto3D()
{
this.faces = new ArrayList<ArrayList<Ponto>>();
this.normais = new ArrayList<Ponto>();
nFaces = 0;
}
public int getNFaces()
{
return nFaces;
}
public ArrayList<ArrayList<Ponto>> getFaces()
{
return faces;
}
public void LeObjeto (String nome)
{
File arquivo = new File(nome);
Scanner scan = null;
try {
scan = new Scanner(arquivo);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
scan.nextLine();
nFaces = Integer.parseInt(scan.nextLine());
scan.nextLine();
for(int i = 0; i < nFaces; i++){
ArrayList<Ponto> face = new ArrayList<Ponto>();
Ponto p1 = new Ponto(scan.nextFloat(),scan.nextFloat(),scan.nextFloat());
Ponto p2 = new Ponto(scan.nextFloat(),scan.nextFloat(),scan.nextFloat());
Ponto p3 = new Ponto(scan.nextFloat(),scan.nextFloat(),scan.nextFloat());
face.add(p1);
face.add(p2);
face.add(p3);
normais.add(calculaNormal(p1, p2, p3));
scan.next();
faces.add(face);
}
}
public static Ponto prodVetorial (Ponto v1, Ponto v2)
{
Ponto vresult = new Ponto(v1.y * v2.z - (v1.z * v2.y),v1.z * v2.x - (v1.x * v2.z),v1.x * v2.y - (v1.y * v2.x));
return vresult;
}
public static Ponto vetUnitario(Ponto vet)
{
double modulo;
modulo = Math.sqrt(vet.x * vet.x + vet.y * vet.y + vet.z * vet.z);
vet.x /= modulo;
vet.y /= modulo;
vet.z /= modulo;
return vet;
}
public static Ponto calculaNormal(Ponto p1, Ponto p2, Ponto p3){
Ponto x = new Ponto(p2.x - p1.x, p2.y-p1.y, p2.z-p1.z);
Ponto y = new Ponto(p3.x - p1.x, p3.y-p1.y, p3.z-p1.z);
return vetUnitario(prodVetorial(x, y));
}
public Ponto getNormal(int index){
return normais.get(index);
}
}