public PolygonTessellator()
{
this.tess = GLU.gluNewTess();
TessCallbackAdapter callback = new TessCallbackAdapter();
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_BEGIN_DATA, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_EDGE_FLAG_DATA, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_VERTEX_DATA, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_END_DATA, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_COMBINE_DATA, callback);
this.interiorIndices = IntBuffer.allocate(10);
this.boundaryIndices = IntBuffer.allocate(10);
}
/**
* Prepares this GLUTessellatorSupport's internal GLU tessellator for use. This initializes the internal
* GLUtessellator to a new instance by invoking {@link javax.media.opengl.glu.GLU#gluNewTess()}, and configures the
* tessellator with the specified callback and normal with calls to {@link javax.media.opengl.glu.GLU#gluTessCallback(javax.media.opengl.glu.GLUtessellator,
* int, javax.media.opengl.glu.GLUtessellatorCallback)} and {@link javax.media.opengl.glu.GLU#gluTessNormal(javax.media.opengl.glu.GLUtessellator,
* double, double, double)}, respectively.
*
* @param callback the callback to configure the GLU tessellator with.
* @param normal the normal to configure the GLU tessellator with.
*
* @throws ArgumentException if the callback or the normal is null.
*/
public void beginTessellation(GLUtessellatorCallback callback, Vec4 normal)
{
if (callback == null)
{
String message = Logging.getMessage("nullValue.CallbackIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
if (normal == null)
{
String message = Logging.getMessage("nullValue.NormalIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
this.tess = GLU.gluNewTess();
GLU.gluTessNormal(this.tess, normal.x, normal.y, normal.z);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_BEGIN, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_VERTEX, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_END, callback);
GLU.gluTessCallback(this.tess, GLU.GLU_TESS_COMBINE, callback);
}
/**
* Creates a new combine context with the specified globe, resolution, and the default region of interest.
*
* @param globe the globe to associate with this context. Shape geometry defined relative to a globe must use
* this globe to compute that geometry.
* @param resolution the minimum resolution, in radians. Used to filter shape detail and compute geometry for
* resolution independent shapes.
*
* @throws java.lang.ArgumentException if the globe is null.
*/
public CombineContext(Globe globe, double resolution)
{
if (globe == null)
{
String msg = Logging.getMessage("nullValue.GlobeIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
GLUtessellatorCallback cb = new TessCallbackAdapter(this); // forward GLU tessellator callbacks to tess* methods
GLUtessellator tess = GLU.gluNewTess();
GLU.gluTessCallback(tess, GLU.GLU_TESS_BEGIN, cb);
GLU.gluTessCallback(tess, GLU.GLU_TESS_VERTEX, cb);
GLU.gluTessCallback(tess, GLU.GLU_TESS_END, cb);
GLU.gluTessCallback(tess, GLU.GLU_TESS_COMBINE, cb);
GLU.gluTessCallback(tess, GLU.GLU_TESS_ERROR, cb);
GLU.gluTessProperty(tess, GLU.GLU_TESS_BOUNDARY_ONLY, GL.GL_TRUE);
GLU.gluTessNormal(tess, 0, 0, 1);
this.globe = globe;
this.resolution = resolution;
this.tess = tess;
}