vertex.java

基于java的3d开发库。对坐java3d的朋友有很大的帮助。

//===========================================================================
//=-------------------------------------------------------------------------=
//= Module history:                                                         =
//= - August 8 2005 - Gabriel Sarmiento / Lina Rojas: Original base version =
//= - November 19 2006 - Oscar Chavarro: re-structured and tested           =
//===========================================================================

package vsdk.toolkit.common;

import java.util.ArrayList;

/**
A vertex is a basic data pack for tipically used operations in computer
graphics, as polygon mesh representations and basic visualization algorithms
and shaders.

This class is meant as a modeling facility for polygon meshes, and a common
structure for operation signatures.

Note that this is NOT a class, but merely a data structure, and as such,
all its attributes are public.  This structure is not supposed to evolve or
change in time radically.
*/
public class Vertex extends FundamentalEntity
{
    /// Check the general attribute description in superclass Entity.
    public static final long serialVersionUID = 20060502L;

    ///
    public Vector3D position;

    ///
    public Vector3D normal;

    ///
    public Vector3D binormal;

    ///
    public Vector3D tangent;

    /// Texture coordinates
    public double u;
    public double v;

    ///
    public ArrayList<Triangle> incidentTriangles;

    public Vertex(double x, double y, double z) {
        position = new Vector3D(x, y, z);
        normal = new Vector3D(1, 0, 0);
        binormal = new Vector3D(0, 1, 0);
        tangent = new Vector3D(0, 0, 1);
        incidentTriangles = null;
        u = 0.0;
        v = 0.0;
    }

    public Vertex(Vector3D position) {
        this.position = position;
        normal = new Vector3D(1, 0, 0);
        binormal = new Vector3D(0, 1, 0);
        tangent = new Vector3D(0, 0, 1);
        incidentTriangles = null;
        u = 0.0;
        v = 0.0;
    }

    public Vertex(Vector3D position, Vector3D normal) {
        this.position = new Vector3D(position);
        this.normal = new Vector3D(normal);
        this.normal.normalize();

        binormal = new Vector3D(0, 1, 0);
        tangent = new Vector3D(0, 0, 1);
        incidentTriangles = null;
        u = 0.0;
        v = 0.0;
    }

    public Vertex(Vector3D position, Vector3D normal, double u, double v) {
        this.position = new Vector3D(position);
        this.normal = new Vector3D(normal);
        this.normal.normalize();

        binormal = new Vector3D(0, 1, 0);
        tangent = new Vector3D(0, 0, 1);
        incidentTriangles = null;
        this.u = u;
        this.v = v;
    }

    public Vertex(Vector3D position, Vector3D normal, Vector3D binormal,
                  Vector3D tangent) {
        this.position = position;
        this.normal = normal;
        this.binormal = binormal;
        this.tangent = tangent;
        incidentTriangles = null;
        u = 0.0;
        v = 0.0;
    }

    public Vertex(Vertex vertex) {
        position = vertex.position;
        normal = vertex.normal;
        binormal = vertex.binormal;
        tangent = vertex.tangent;
        incidentTriangles=vertex.getIncidentTriangles();
        u = vertex.u;
        v = vertex.v;
    }

    public Vector3D getPosition() {
        return this.position;
    }

    public Vector3D getNormal() {
        return normal;
    }

    public Vector3D getBinormal() {
        return this.binormal;
    }

    public Vector3D getTangent() {
        return this.tangent;
    }

    public double getU() {
        return this.u;
    }

    public double getV() {
        return this.v;
    }

    public ArrayList<Triangle> getIncidentTriangles() {
        return this.incidentTriangles;
    }

    public void setPosition(Vector3D position) {
        this.position = new Vector3D(position);
    }

    public void setNormal(Vector3D normal) {
        this.normal = new Vector3D(normal);
        this.normal.normalize();
    }

    public void setBinormal(Vector3D binormal) {
        this.binormal = binormal;
    }

    public void setTangent(Vector3D tangent) {
        this.tangent = tangent;
    }

    public void setU(double u) {
        this.u = u;
    }

    public void setV(double v) {
        this.v = v;
    }

    public void setIncidentTriangles(ArrayList<Triangle> incidentTriangles) {
        this.incidentTriangles = incidentTriangles;
    }

    public Triangle getIncidentTriangleAt(int index) {
        return incidentTriangles.get(index);
    }

    /**
    Provides an object to text report convertion, optimized for human
    readability and debugging. Do not use for serialization or persistence
    purposes.
    */
    public String toString() {
        return "v " + position +" n " + normal + " UV<" +
            VSDK.formatDouble(u) + ", " + VSDK.formatDouble(v) + ">";
    }
}

//===========================================================================
//= EOF                                                                     =
//===========================================================================