public Matrix pushReferenceCenter(DrawContext dc, Vec4 referenceCenter)
{
if (dc == null)
{
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
if (dc.getGL() == null)
{
String message = Logging.getMessage("nullValue.DrawingContextGLIsNull");
Logging.logger().severe(message);
throw new IllegalStateException(message);
}
if (referenceCenter == null)
{
String message = Logging.getMessage("nullValue.PointIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
Matrix modelview = getModelviewMatrix();
// Compute a new model-view matrix with origin at referenceCenter.
Matrix matrix = null;
if (modelview != null)
{
matrix = modelview.multiply(Matrix.fromTranslation(referenceCenter));
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
// Store the current matrix-mode state.
OGLStackHandler ogsh = new OGLStackHandler();
try
{
ogsh.pushAttrib(gl, GL2.GL_TRANSFORM_BIT);
gl.MatrixMode(GL2.GL_MODELVIEW);
// Push and load a new model-view matrix to the current OpenGL context held by 'dc'.
gl.PushMatrix();
if (matrix != null)
{
double[] matrixArray = new double[16];
matrix.toArray(matrixArray, 0, false);
gl.LoadMatrix(matrixArray);
}
}
finally
{
ogsh.pop(gl);
}
return(matrix);
}
public Matrix setReferenceCenter(DrawContext dc, Vec4 referenceCenter)
{
if (dc == null)
{
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
if (dc.getGL() == null)
{
String message = Logging.getMessage("nullValue.DrawingContextGLIsNull");
Logging.logger().severe(message);
throw new IllegalStateException(message);
}
if (referenceCenter == null)
{
String message = Logging.getMessage("nullValue.PointIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
Matrix modelview = getModelviewMatrix();
// Compute a new model-view matrix with origin at referenceCenter.
Matrix matrix = null;
if (modelview != null)
{
matrix = modelview.multiply(Matrix.fromTranslation(referenceCenter));
}
if (matrix == null)
{
return(null);
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
gl.MatrixMode(GL2.GL_MODELVIEW);
double[] matrixArray = new double[16];
matrix.toArray(matrixArray, 0, false);
gl.LoadMatrix(matrixArray);
return(matrix);
}
/**
* Sets the the opengl modelview and projection matrices to the given matrices.
*
* @param dc the drawing context
* @param modelview the modelview matrix
* @param projection the projection matrix
*/
public static void loadGLViewState(DrawContext dc, Matrix modelview, Matrix projection)
{
if (dc == null)
{
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
if (dc.getGL() == null)
{
String message = Logging.getMessage("nullValue.DrawingContextGLIsNull");
Logging.logger().severe(message);
throw new IllegalStateException(message);
}
if (modelview == null)
{
Logging.logger().fine("nullValue.ModelViewIsNull");
}
if (projection == null)
{
Logging.logger().fine("nullValue.ProjectionIsNull");
}
double[] matrixArray = new double[16];
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
// Store the current matrix-mode state.
OGLStackHandler ogsh = new OGLStackHandler();
try
{
ogsh.pushAttrib(gl, GL2.GL_TRANSFORM_BIT);
// Apply the model-view matrix to the current OpenGL context.
gl.MatrixMode(GL2.GL_MODELVIEW);
if (modelview != null)
{
modelview.toArray(matrixArray, 0, false);
gl.LoadMatrix(matrixArray);
}
else
{
gl.LoadIdentity();
}
// Apply the projection matrix to the current OpenGL context.
gl.MatrixMode(GL2.GL_PROJECTION);
if (projection != null)
{
projection.toArray(matrixArray, 0, false);
gl.LoadMatrix(matrixArray);
}
else
{
gl.LoadIdentity();
}
}
finally
{
ogsh.pop(gl);
}
}
