155 lines
4.9 KiB
C++
155 lines
4.9 KiB
C++
// Filename: geomVertexReader.cxx
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// Created by: drose (25Mar05)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#include "geomVertexReader.h"
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#ifndef NDEBUG
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// This is defined just for the benefit of having something non-NULL
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// to return from a nassertr() call.
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const unsigned char GeomVertexReader::empty_buffer[100] = { 0 };
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#endif
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////////////////////////////////////////////////////////////////////
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// Function: GeomVertexReader::set_column
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// Access: Published
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// Description: Sets up the reader to use the indicated column
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// description on the given array.
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//
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// This also resets the current read row number to the
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// start row (the same value passed to a previous call
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// to set_row(), or 0 if set_row() was never called.)
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//
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// The return value is true if the data type is valid,
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// false otherwise.
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////////////////////////////////////////////////////////////////////
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bool GeomVertexReader::
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set_column(int array, const GeomVertexColumn *column) {
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if (column == (const GeomVertexColumn *)NULL) {
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// Clear the data type.
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_array = -1;
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_packer = NULL;
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_stride = 0;
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_pointer = NULL;
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_pointer_end = NULL;
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return false;
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}
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if (_vertex_data != (const GeomVertexData *)NULL) {
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GeomVertexDataPipelineReader reader(_vertex_data, _current_thread);
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reader.check_array_readers();
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return set_vertex_column(array, column, &reader);
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}
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if (_array_data != (const GeomVertexArrayData *)NULL) {
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return set_array_column(column);
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}
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// No data is associated with the Reader.
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return false;
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}
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////////////////////////////////////////////////////////////////////
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// Function: GeomVertexReader::output
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// Access: Published
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// Description:
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////////////////////////////////////////////////////////////////////
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void GeomVertexReader::
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output(ostream &out) const {
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const GeomVertexColumn *column = get_column();
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if (column == (GeomVertexColumn *)NULL) {
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out << "GeomVertexReader()";
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} else {
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out << "GeomVertexReader, array = " << get_array_data()
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<< ", column = " << column->get_name()
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<< " (" << get_packer()->get_name()
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<< "), read row " << get_read_row();
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: GeomVertexReader::initialize
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// Access: Private
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// Description: Called only by the constructor.
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////////////////////////////////////////////////////////////////////
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void GeomVertexReader::
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initialize() {
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_array = 0;
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_packer = NULL;
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_pointer_begin = NULL;
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_pointer_end = NULL;
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_pointer = NULL;
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_start_row = 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: GeomVertexReader::set_vertex_column
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// Access: Private
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// Description: Internal method to set the column to column from the
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// indicated array, assuming we have a GeomVertexData
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////////////////////////////////////////////////////////////////////
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bool GeomVertexReader::
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set_vertex_column(int array, const GeomVertexColumn *column,
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const GeomVertexDataPipelineReader *data_reader) {
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if (column == (const GeomVertexColumn *)NULL) {
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return set_column(0, NULL);
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}
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nassertr(_vertex_data != (const GeomVertexData *)NULL, false);
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#ifndef NDEBUG
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_array = -1;
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_packer = NULL;
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nassertr(array >= 0 && array < _vertex_data->get_num_arrays(), false);
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#endif
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_array = array;
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_handle = data_reader->get_array_reader(_array);
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_stride = _handle->get_array_format()->get_stride();
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_packer = column->_packer;
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set_pointer(_start_row);
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return true;
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}
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////////////////////////////////////////////////////////////////////
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// Function: GeomVertexReader::set_array_column
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// Access: Private
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// Description: Internal method to set the column to column from the
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// indicated array, assuming we have a
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// GeomVertexArrayData.
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////////////////////////////////////////////////////////////////////
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bool GeomVertexReader::
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set_array_column(const GeomVertexColumn *column) {
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if (column == (const GeomVertexColumn *)NULL) {
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return set_column(0, NULL);
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}
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nassertr(_array_data != (const GeomVertexArrayData *)NULL, false);
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_handle = _array_data->get_handle();
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_stride = _handle->get_array_format()->get_stride();
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_packer = column->_packer;
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set_pointer(_start_row);
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return true;
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}
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