Knob Class for Web-Based 3D Experiment - Interactive Web-Based Virtual Reality with Java 3D - page 353

new Point3f(0.92f*radius, 0.06f*radius, 0.52f*length),

// bottom face

new Point3f(0.92f*radius, -0.06f*radius, 0.52f*length),

new Point3f(0.92f*radius, -0.06f*radius, -0.52f*length),

new Point3f(1.0f*radius, -0.06f*radius, -0.52f*length),

new Point3f(1.0f*radius, -0.06f*radius, 0.52f*length),

};

Vector3f[] normals =

{

new Vector3f( 0.0f, 0.0f, 1.0f), // front face

new Vector3f( 1.0f, 0.0f, 0.0f), // right face

new Vector3f( 0.0f, 1.0f, 0.0f), // top face

new Vector3f( 0.0f, -1.0f, 0.0f), // bottom face

};

int i;

QuadArray mark = new QuadArray(20, QuadArray.COORDINATES|QuadArray.NORMALS

|QuadArray.TEXTURE_COORDINATE_2);

for (i = 0; i < 16; i++)

{

mark.setCoordinate(i, verts[i]);

}

for (i = 0; i < 16; i++)

{

mark.setNormal(i, normals[i/4]);

}

mark.setCapability(Geometry.ALLOW_INTERSECT);

newShape = new Shape3D(mark, dotlook);

PickTool.setCapabilities(newShape, PickTool.INTERSECT_FULL);

this.addChild(newShape);

this.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
this.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
this.setCapability(TransformGroup.ALLOW_PICKABLE_READ);
this.setCapability(TransformGroup.ALLOW_PICKABLE_WRITE);
this.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
}

f.3 functIon for chanGInG orIentatIon of knob

public void setRotationX(float angle)
{

Matrix3d rotMat = new Matrix3d();

Transform3D rt3d = new Transform3D();

this.getTransform(rt3d);

rt3d.getRotationScale(rotMat);