Knob Class for Web-Based 3D Experiment - Interactive Web-Based Virtual Reality with Java 3D - page 354

rotMat.m11 = Math.cos(angle);

rotMat.m22 = rotMat.m11;

rotMat.m12 = Math.sin(angle);

rotMat.m21 = -rotMat.m12;

rt3d.setRotation(rotMat);

this.setTransform(rt3d);

}

public void setRotationY(float angle)
{

Matrix3d rotMat = new Matrix3d();

Transform3D rt3d = new Transform3D();

this.getTransform(rt3d);

rt3d.getRotationScale(rotMat);

rotMat.m00 = Math.cos(angle);

rotMat.m22 = rotMat.m00;

rotMat.m02 = Math.sin(angle);

rotMat.m20 = -rotMat.m02;

rt3d.setRotation(rotMat);

this.setTransform(rt3d);

}
public void setRotationZ(float angle)
{

Matrix3d rotMat = new Matrix3d();

Transform3D rt3d = new Transform3D();

this.getTransform(rt3d);

rt3d.getRotationScale(rotMat);

rotMat.m00 = Math.cos(angle);

rotMat.m11 = rotMat.m00;

rotMat.m10 = Math.sin(angle);

rotMat.m01 = -rotMat.m10;

rt3d.setRotation(rotMat);

this.setTransform(rt3d);

}

f.4 functIon for chanGInG posItIon of knob

public void setPosition(Point3f point)
{

Transform3D t3d = new Transform3D();

this.getTransform(t3d);

t3d.setTranslation(new Vector3d(point));

this.setTransform(t3d);

this.setTransform(t3d);

}
}