| 1 | /************************************************************************
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| 2 |
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| 3 | MxSMF
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| 4 |
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| 5 | Copyright (C) 1998 Michael Garland. See "COPYING.txt" for details.
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| 6 |
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| 7 | $Id: MxSMF.cxx,v 1.1 2002/09/24 16:53:54 wimmer Exp $
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| 8 |
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| 9 | ************************************************************************/
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| 10 |
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| 11 | #include "stdmix.h"
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| 12 | #include "mixio.h"
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| 13 | #include "MxSMF.h"
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| 14 | #include "MxVector.h"
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| 15 |
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| 16 | #define SMF_MAXLINE 65536
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| 17 |
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| 18 |
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| 19 | MxSMFReader::cmd_entry MxSMFReader::read_cmds[] = {
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| 20 | { "v", &MxSMFReader::vertex },
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| 21 | { "t", &MxSMFReader::face },
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| 22 | { "f", &MxSMFReader::face },
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| 23 |
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| 24 | // Properties and binding -- this is the new way to handle things
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| 25 | { "bind", &MxSMFReader::prop_bind },
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| 26 | { "n", &MxSMFReader::prop_normal },
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| 27 | { "c", &MxSMFReader::prop_color },
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| 28 | { "r", &MxSMFReader::prop_texcoord },
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| 29 |
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| 30 | { "begin", &MxSMFReader::begin },
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| 31 | { "end", &MxSMFReader::end },
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| 32 |
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| 33 | { "trans", &MxSMFReader::trans },
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| 34 | { "rot", &MxSMFReader::rot },
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| 35 | { "scale", &MxSMFReader::scale },
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| 36 |
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| 37 | { "tex", &MxSMFReader::read_texture },
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| 38 | { "t_trans", &MxSMFReader::t_trans },
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| 39 | { "t_scale", &MxSMFReader::t_scale },
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| 40 |
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| 41 | { NULL, NULL }
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| 42 | };
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| 43 |
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| 44 |
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| 45 | MxSMFReader::MxSMFReader()
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| 46 | : vx_stack(Mat4::I, 2), tx_stack(Mat4::I, 2),
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| 47 | vcorrect_stack(0, 2), vfirst_stack(1, 2)
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| 48 | {
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| 49 | next_vertex=1;
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| 50 | next_face=1;
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| 51 | quad_count=0;
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| 52 | poly_count=0;
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| 53 | line_buffer = new char[SMF_MAXLINE];
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| 54 | unparsed_hook = NULL;
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| 55 |
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| 56 | define_avars();
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| 57 | }
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| 58 |
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| 59 | MxSMFReader::~MxSMFReader()
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| 60 | {
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| 61 | delete[] line_buffer;
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| 62 | }
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| 63 |
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| 64 | void MxSMFReader::v_xform(Vec3& v)
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| 65 | {
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| 66 | Vec4 v2 = vx_stack.top() * Vec4(v,1);
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| 67 |
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| 68 | v[X] = v2[X]/v2[W];
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| 69 | v[Y] = v2[Y]/v2[W];
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| 70 | v[Z] = v2[Z]/v2[W];
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| 71 | }
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| 72 |
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| 73 | void MxSMFReader::t_xform(Vec2& v)
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| 74 | {
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| 75 | Vec4 v2 = tx_stack.top() * Vec4(v[X],v[Y],0,1);
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| 76 |
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| 77 | v[X] = v2[X]/v2[W];
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| 78 | v[Y] = v2[Y]/v2[W];
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| 79 | }
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| 80 |
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| 81 | unsigned int MxSMFReader::vid_xform(int id)
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| 82 | {
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| 83 | if( id < 0 )
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| 84 | id += next_vertex;
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| 85 | else
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| 86 | id += vcorrect_stack.top() + (vfirst_stack.top() - 1);
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| 87 |
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| 88 | return id;
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| 89 | }
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| 90 |
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| 91 | ////////////////////////////////////////////////////////////////////////
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| 92 |
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| 93 | void MxSMFReader::define_avars()
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| 94 | {
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| 95 | asp_store()->defvar("vertex_correction", MXASP_INT, &vcorrect_stack.top());
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| 96 | }
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| 97 |
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| 98 | void MxSMFReader::update_avars()
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| 99 | {
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| 100 | MxAspVar *avar;
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| 101 |
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| 102 | avar = asp_store()->lookup("vertex_correction");
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| 103 | if( avar )
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| 104 | avar->bind("vertex_correction", MXASP_INT, &vcorrect_stack.top());
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| 105 | }
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| 106 |
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| 107 | void MxSMFReader::begin(int, char *[], MxStdModel&)
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| 108 | {
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| 109 | vx_stack.push();
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| 110 | tx_stack.push();
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| 111 | vfirst_stack.push(next_vertex);
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| 112 | vcorrect_stack.push();
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| 113 | update_avars();
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| 114 | }
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| 115 |
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| 116 | void MxSMFReader::end(int, char *[], MxStdModel&)
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| 117 | {
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| 118 | vx_stack.pop();
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| 119 | tx_stack.pop();
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| 120 | vfirst_stack.pop();
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| 121 | vcorrect_stack.pop();
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| 122 | update_avars();
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| 123 | }
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| 124 |
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| 125 | void MxSMFReader::trans(int, char *argv[], MxStdModel&)
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| 126 | {
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| 127 | Mat4 M = Mat4::trans(atof(argv[0]), atof(argv[1]), atof(argv[2]));
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| 128 | vx_stack.top() = vx_stack.top() * M;
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| 129 | }
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| 130 |
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| 131 | void MxSMFReader::rot(int, char *argv[], MxStdModel&)
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| 132 | {
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| 133 | Mat4 M;
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| 134 | switch( argv[0][0] )
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| 135 | {
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| 136 | case 'x':
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| 137 | M = Mat4::xrot(atof(argv[1]) * M_PI/180.0);
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| 138 | break;
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| 139 | case 'y':
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| 140 | M = Mat4::yrot(atof(argv[1]) * M_PI/180.0);
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| 141 | break;
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| 142 | case 'z':
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| 143 | M = Mat4::zrot(atof(argv[1]) * M_PI/180.0);
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| 144 | break;
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| 145 | default:
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| 146 | mxmsg_signal(MXMSG_WARN, "Malformed SMF rotation command.");
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| 147 | break;
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| 148 | }
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| 149 |
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| 150 | vx_stack.top() = vx_stack.top() * M;
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| 151 | }
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| 152 |
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| 153 | void MxSMFReader::scale(int, char *argv[], MxStdModel&)
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| 154 | {
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| 155 | Mat4 M = Mat4::scale(atof(argv[0]), atof(argv[1]), atof(argv[2]));
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| 156 | vx_stack.top() = vx_stack.top() * M;
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| 157 | }
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| 158 |
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| 159 | void MxSMFReader::t_trans(int, char *argv[], MxStdModel&)
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| 160 | {
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| 161 | Mat4 M = Mat4::trans(atof(argv[0]), atof(argv[1]), 0.0);
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| 162 | tx_stack.top() = tx_stack.top() * M;
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| 163 | }
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| 164 |
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| 165 | void MxSMFReader::t_scale(int, char *argv[], MxStdModel&)
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| 166 | {
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| 167 | Mat4 M = Mat4::scale(atof(argv[0]), atof(argv[1]), 1.0);
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| 168 | tx_stack.top() = tx_stack.top() * M;
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| 169 | }
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| 170 |
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| 171 | void MxSMFReader::vertex(int, char *argv[], MxStdModel& m)
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| 172 | {
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| 173 | Vec3 v(atof(argv[0]), atof(argv[1]), atof(argv[2]));
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| 174 |
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| 175 | v_xform(v);
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| 176 | next_vertex++;
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| 177 |
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| 178 | m.add_vertex((float)v[X], (float)v[Y], (float)v[Z]);
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| 179 | }
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| 180 |
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| 181 | void MxSMFReader::prop_bind(int argc, char *argv[], MxStdModel& m)
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| 182 | {
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| 183 | if( argc < 2 ) return; // Not enough arguments
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| 184 |
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| 185 | switch( argv[0][0] )
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| 186 | {
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| 187 | case 'n': m.normal_binding(m.parse_binding(argv[1])); break;
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| 188 | case 'c': m.color_binding(m.parse_binding(argv[1])); break;
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| 189 | case 'r': m.texcoord_binding(m.parse_binding(argv[1])); break;
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| 190 | }
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| 191 | }
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| 192 |
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| 193 | void MxSMFReader::prop_normal(int /*argc*/, char *argv[], MxStdModel& m)
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| 194 | {
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| 195 | Vec3 n(atof(argv[0]), atof(argv[1]), atof(argv[2]));
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| 196 | //v_xform(n); //!!BUG: Need to transform normals appropriately
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| 197 | unitize(n);
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| 198 | m.add_normal((float)n[X], (float)n[Y], (float)n[Z]);
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| 199 | }
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| 200 |
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| 201 | void MxSMFReader::prop_color(int /*argc*/, char *argv[], MxStdModel& m)
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| 202 | {
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| 203 | float r = (float)atof(argv[0]);
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| 204 | float g = (float)atof(argv[1]);
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| 205 | float b = (float)atof(argv[2]);
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| 206 | m.add_color(r, g, b);
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| 207 | }
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| 208 |
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| 209 | void MxSMFReader::prop_texcoord(int /*argc*/, char *argv[], MxStdModel& m)
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| 210 | {
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| 211 | Vec2 v(atof(argv[0]), atof(argv[1]));
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| 212 | t_xform(v);
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| 213 | m.add_texcoord((float)v[X], (float)v[Y]);
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| 214 | }
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| 215 |
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| 216 | void MxSMFReader::read_texture(int /*argc*/, char *argv[], MxStdModel& m)
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| 217 | {
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| 218 | ifstream in(argv[0]);
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| 219 | MxRaster *tex = pnm_read(in);
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| 220 | tex->vflip();
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| 221 | m.add_texmap(tex, argv[0]);
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| 222 | }
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| 223 |
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| 224 | void MxSMFReader::face(int argc, char *argv[], MxStdModel& m)
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| 225 | {
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| 226 | if( argc == 3 )
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| 227 | {
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| 228 | unsigned int v0 = vid_xform(atoi(argv[0]));
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| 229 | unsigned int v1 = vid_xform(atoi(argv[1]));
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| 230 | unsigned int v2 = vid_xform(atoi(argv[2]));
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| 231 |
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| 232 | next_face++;
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| 233 | m.add_face(v0 - 1, v1 - 1, v2 - 1);
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| 234 | }
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| 235 | else if( argc == 4 )
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| 236 | {
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| 237 | if( !quad_count )
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| 238 | mxmsg_signalf(MXMSG_NOTE,
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| 239 | "Input polygon #%d is a quadrilateral. Splitting it.", next_face);
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| 240 |
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| 241 | quad_count++;
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| 242 |
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| 243 | unsigned int v[4];
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| 244 | v[0] = vid_xform(atoi(argv[0])) - 1;
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| 245 | v[1] = vid_xform(atoi(argv[1])) - 1;
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| 246 | v[2] = vid_xform(atoi(argv[2])) - 1;
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| 247 | v[3] = vid_xform(atoi(argv[3])) - 1;
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| 248 |
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| 249 | float e[4][3];
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| 250 | mxv_unitize(mxv_sub(e[0], m.vertex(v[1]), m.vertex(v[0]), 3), 3);
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| 251 | mxv_unitize(mxv_sub(e[1], m.vertex(v[2]), m.vertex(v[1]), 3), 3);
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| 252 | mxv_unitize(mxv_sub(e[2], m.vertex(v[3]), m.vertex(v[2]), 3), 3);
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| 253 | mxv_unitize(mxv_sub(e[3], m.vertex(v[0]), m.vertex(v[3]), 3), 3);
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| 254 |
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| 255 | float a_02 = (1-mxv_dot(e[0], e[3], 3)) + (1-mxv_dot(e[1], e[2], 3));
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| 256 | float a_13 = (1-mxv_dot(e[1], e[0], 3)) + (1-mxv_dot(e[3], e[2], 3));
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| 257 |
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| 258 | if( a_02 <= a_13 )
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| 259 | {
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| 260 | next_face++; m.add_face(v[0], v[1], v[2]);
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| 261 | next_face++; m.add_face(v[0], v[2], v[3]);
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| 262 | }
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| 263 | else
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| 264 | {
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| 265 | next_face++; m.add_face(v[0], v[1], v[3]);
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| 266 | next_face++; m.add_face(v[1], v[2], v[3]);
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| 267 | }
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| 268 | }
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| 269 | else
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| 270 | {
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| 271 | mxmsg_signalf(MXMSG_WARN,
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| 272 | "Input polygon #%d has more than 4 sides. Ignoring it.",
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| 273 | next_face);
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| 274 |
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| 275 | poly_count++;
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| 276 | }
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| 277 | }
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| 278 |
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| 279 | ////////////////////////////////////////////////////////////////////////
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| 280 |
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| 281 | bool MxSMFReader::execute_command(const MxCmd& cmd, void *closure)
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| 282 | {
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| 283 | MxStdModel& m = *(MxStdModel *)closure;
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| 284 | int argc = cmd.phrases[0].length();
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| 285 | char **argv = (char **)&cmd.phrases[0][0];
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| 286 |
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| 287 | cmd_entry *entry = &read_cmds[0];
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| 288 | bool handled = false;
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| 289 |
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| 290 | while( entry->name && !handled )
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| 291 | if( streq(entry->name, cmd.op) )
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| 292 | {
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| 293 | (this->*(entry->cmd))(argc, argv, m);
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| 294 | handled = true;
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| 295 | }
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| 296 | else
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| 297 | entry++;
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| 298 |
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| 299 | if( !handled )
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| 300 | if( !unparsed_hook ||
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| 301 | unparsed_hook && !(*unparsed_hook)(cmd.op, argc, argv, m) )
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| 302 | {
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| 303 | return false;
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| 304 | }
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| 305 |
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| 306 | return true;
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| 307 | }
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| 308 |
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| 309 | void MxSMFReader::parse_line(char *line, MxStdModel& m)
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| 310 | {
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| 311 | MxCmdParser::parse_line(line, &m);
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| 312 | }
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| 313 |
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| 314 | MxStdModel *MxSMFReader::read(istream& in, MxStdModel *m)
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| 315 | {
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| 316 | if( !m )
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| 317 | m = new MxStdModel(8, 16);
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| 318 |
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| 319 | begin(0, NULL, *m);
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| 320 | while( !in.eof() )
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| 321 | {
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| 322 | in >> ws;
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| 323 | if( in.peek() == '#' )
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| 324 | in.ignore(SMF_MAXLINE, '\n');
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| 325 | else if( in.getline(line_buffer, SMF_MAXLINE, '\n').good() )
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| 326 | parse_line(line_buffer, *m);
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| 327 | }
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| 328 | end(0, NULL, *m);
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| 329 |
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| 330 | if( quad_count )
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| 331 | mxmsg_signalf(MXMSG_WARN,
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| 332 | "Split %d input quadrilaterals. "
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| 333 | "Auto-splitting does not preserve properties!",
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| 334 | quad_count);
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| 335 | if( poly_count )
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| 336 | mxmsg_signalf(MXMSG_WARN,
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| 337 | "Ignored %d input polygons of more than 4 sides.",
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| 338 | poly_count);
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| 339 |
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| 340 |
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| 341 | return m;
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| 342 | }
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| 343 |
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| 344 | #ifndef MIX_ANSI_IOSTREAMS
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| 345 | MxStdModel *MxSMFReader::read(int fd, MxStdModel *m)
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| 346 | {
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| 347 | ifstream in(dup(fd)); // Duplicate handle will be closed on exit
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| 348 | return read(in, m);
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| 349 | }
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| 350 | #endif
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| 351 |
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| 352 |
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| 353 |
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| 354 | MxSMFWriter::MxSMFWriter()
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| 355 | {
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| 356 | vertex_annotate = NULL;
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| 357 | face_annotate = NULL;
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| 358 | }
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| 359 |
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| 360 | void MxSMFWriter::write(ostream& out, MxStdModel& m)
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| 361 | {
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| 362 | unsigned int i;
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| 363 |
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| 364 | out << "begin" << endl;
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| 365 |
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| 366 | for(unsigned int v=0; v<m.vert_count(); v++)
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| 367 | {
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| 368 | // We must output all vertices since numbering is implicit
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| 369 | if( vertex_annotate ) (*vertex_annotate)(out, m, v);
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| 370 | out << m.vertex(v) << endl;
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| 371 | }
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| 372 |
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| 373 | for(unsigned int f=0; f<m.face_count(); f++)
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| 374 | if( m.face_is_valid(f) )
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| 375 | {
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| 376 | if( face_annotate ) (*face_annotate)(out, m, f);
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| 377 | out << m.face(f) << endl;
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| 378 | }
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| 379 |
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| 380 | if( m.normal_binding() != MX_UNBOUND )
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| 381 | {
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| 382 | out << "bind n " << m.binding_name(m.normal_binding()) << endl;
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| 383 | for(i=0; i<m.normal_count(); i++)
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| 384 | out << m.normal(i) << endl;
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| 385 | }
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| 386 |
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| 387 | if( m.color_binding() != MX_UNBOUND )
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| 388 | {
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| 389 | out << "bind c " << m.binding_name(m.color_binding()) << endl;
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| 390 | for(i=0; i<m.color_count(); i++)
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| 391 | out << m.color(i) << endl;
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| 392 | }
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| 393 |
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| 394 | if( m.texcoord_binding() != MX_UNBOUND )
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| 395 | {
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| 396 | out << "tex " << m.texmap_name() << endl;
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| 397 | out << "bind r " << m.binding_name(m.texcoord_binding()) << endl;
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| 398 | for(i=0; i<m.texcoord_count(); i++)
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| 399 | out << m.texcoord(i) << endl;
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| 400 | }
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| 401 |
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| 402 | out << "end" << endl;
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| 403 | }
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| 404 |
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| 405 | #ifndef MIX_ANSI_IOSTREAMS
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| 406 | void MxSMFWriter::write(int fd, MxStdModel& m)
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| 407 | {
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| 408 | ofstream out(dup(fd)); // Duplicate handle will be closed on exit
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| 409 | write(out, m);
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|---|
| 410 | }
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|---|
| 411 | #endif
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|---|
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