141 lines
4.2 KiB
C++
141 lines
4.2 KiB
C++
// Filename: fltMeshPrimitive.cxx
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// Created by: drose (28Feb01)
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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, 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://www.panda3d.org/license.txt .
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//
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// To contact the maintainers of this program write to
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// panda3d@yahoogroups.com .
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//
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////////////////////////////////////////////////////////////////////
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#include "fltMeshPrimitive.h"
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#include "fltRecordReader.h"
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#include "fltRecordWriter.h"
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#include "fltHeader.h"
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#include "fltMaterial.h"
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TypeHandle FltMeshPrimitive::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: FltMeshPrimitive::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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FltMeshPrimitive::
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FltMeshPrimitive(FltHeader *header) : FltBead(header) {
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_primitive_type = PT_tristrip;
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}
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////////////////////////////////////////////////////////////////////
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// Function: FltMeshPrimitive::extract_record
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// Access: Protected, Virtual
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// Description: Fills in the information in this bead based on the
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// information given in the indicated datagram, whose
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// opcode has already been read. Returns true on
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// success, false if the datagram is invalid.
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////////////////////////////////////////////////////////////////////
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bool FltMeshPrimitive::
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extract_record(FltRecordReader &reader) {
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if (!FltBead::extract_record(reader)) {
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return false;
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}
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nassertr(reader.get_opcode() == FO_mesh_primitive, false);
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DatagramIterator &iterator = reader.get_iterator();
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_primitive_type = (PrimitiveType)iterator.get_be_int16();
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int vertex_width = iterator.get_be_int16();
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int num_vertices = iterator.get_be_int32();
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if (vertex_width == 1) {
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for (int i = 0; i < num_vertices; i++) {
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_vertices.push_back(iterator.get_uint8());
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}
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} else if (vertex_width == 2) {
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for (int i = 0; i < num_vertices; i++) {
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_vertices.push_back(iterator.get_be_uint16());
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}
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} else if (vertex_width == 4) {
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for (int i = 0; i < num_vertices; i++) {
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_vertices.push_back(iterator.get_be_int32());
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}
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} else {
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nout << "Invalid vertex width in mesh primitive: " << vertex_width
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<< "\n";
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return false;
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}
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check_remaining_size(iterator);
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return true;
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}
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////////////////////////////////////////////////////////////////////
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// Function: FltMeshPrimitive::build_record
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// Access: Protected, Virtual
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// Description: Fills up the current record on the FltRecordWriter with
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// data for this record, but does not advance the
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// writer. Returns true on success, false if there is
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// some error.
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////////////////////////////////////////////////////////////////////
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bool FltMeshPrimitive::
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build_record(FltRecordWriter &writer) const {
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if (!FltBead::build_record(writer)) {
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return false;
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}
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writer.set_opcode(FO_mesh_primitive);
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Datagram &datagram = writer.update_datagram();
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datagram.add_be_int16(_primitive_type);
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// Determine the optimum index width, based on the largest vertex
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// index.
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int max_index = 0;
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Vertices::const_iterator vi;
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for (vi = _vertices.begin(); vi != _vertices.end(); ++vi) {
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max_index = max(max_index, (*vi));
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}
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int vertex_width;
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if (max_index < 0x100) {
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vertex_width = 1;
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} else if (max_index < 0x10000) {
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vertex_width = 2;
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} else {
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vertex_width = 4;
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}
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datagram.add_be_int16(vertex_width);
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datagram.add_be_int32(_vertices.size());
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if (vertex_width == 1) {
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for (vi = _vertices.begin(); vi != _vertices.end(); ++vi) {
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datagram.add_uint8(*vi);
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}
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} else if (vertex_width == 2) {
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for (vi = _vertices.begin(); vi != _vertices.end(); ++vi) {
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datagram.add_be_uint16(*vi);
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}
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} else {
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for (vi = _vertices.begin(); vi != _vertices.end(); ++vi) {
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datagram.add_be_int32(*vi);
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}
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}
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return true;
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}
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