vect.java

JAVA 反走样画直线 可在JAVA1.1下使用

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// DeJaved by mDeJava v1.0. Copyright 1999 MoleSoftware. //
//       To download last version of this software:      //
//            http://molesoftware.hypermatr.net          //
//               e-mail:[e-mail]             //
///////////////////////////////////////////////////////////


public class Vect
{

    public float d[] = null;

    Vect(float f, float f1, float f2)
    {
        d = new float[4];
        d[0] = f;
        d[1] = f1;
        d[2] = f2;
        d[3] = 1.0F;
    }

    public float Magnitude()
    {
        return (float)Math.sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
    }

    public boolean Equal(Vect vect)
    {
        return vect.d[0] == d[0] && vect.d[1] == d[1] && vect.d[2] == d[2];
    }

    public void Mul(float f)
    {
        d[0] *= f;
        d[1] *= f;
        d[2] *= f;
    }

    public void Div(float f)
    {
        d[0] /= f;
        d[1] /= f;
        d[2] /= f;
    }

    public void Add(Vect vect)
    {
        d[0] += vect.d[0];
        d[1] += vect.d[1];
        d[2] += vect.d[2];
    }

    public void Sub(Vect vect)
    {
        d[0] -= vect.d[0];
        d[1] -= vect.d[1];
        d[2] -= vect.d[2];
    }

    public float Dot(Vect vect)
    {
        return d[0] * vect.d[0] + d[1] * vect.d[1] + d[2] * vect.d[2];
    }

    public Vect Cross(Vect vect)
    {
        return new Vect(d[1] * vect.d[2] - d[2] * vect.d[1], d[2] * vect.d[0] - d[0] * vect.d[2], d[0] * vect.d[1] - d[1] * vect.d[0]);
    }

    public void Normalize()
    {
        Mul(1.0F / Magnitude());
    }

    public void Project()
    {
        d[2] += 256F;
        d[0] *= 1024F / d[2];
        d[1] *= 1024F / d[2];
    }

    public Vect copy()
    {
        return new Vect(d[0], d[1], d[2]);
    }
}