1 /*******************************************************
2 Lightwave Object Loader for OSG
3
4 Copyright (C) 2004 Marco Jez <marco.jez@poste.it>
5 OpenSceneGraph is (C) 2004 Robert Osfield
6 ********************************************************/
7
8 #include "Block.h"
9
10 #include <osg/Notify>
11 #include <osg/Matrix>
12
13 using namespace lwosg;
14
Block(const lwo2::FORM::SURF::BLOK * blok)15 Block::Block(const lwo2::FORM::SURF::BLOK *blok)
16 : enabled_(true),
17 opacity_type_(ADDITIVE),
18 opacity_amount_(1)
19 {
20 if (blok) {
21 compile(blok);
22 }
23 }
24
read_common_attributes(const iff::Chunk_list & subchunks)25 void Block::read_common_attributes(const iff::Chunk_list &subchunks)
26 {
27 for (iff::Chunk_list::const_iterator i=subchunks.begin(); i!=subchunks.end(); ++i) {
28 const lwo2::FORM::SURF::BLOK::CHAN *chan = dynamic_cast<const lwo2::FORM::SURF::BLOK::CHAN *>(*i);
29 if (chan) {
30 channel_ = std::string(chan->texture_channel.id, 4);
31 }
32 const lwo2::FORM::SURF::BLOK::ENAB *enab = dynamic_cast<const lwo2::FORM::SURF::BLOK::ENAB *>(*i);
33 if (enab) {
34 enabled_ = enab->enable != 0;
35 }
36 const lwo2::FORM::SURF::BLOK::OPAC *opac = dynamic_cast<const lwo2::FORM::SURF::BLOK::OPAC *>(*i);
37 if (opac) {
38 opacity_type_ = static_cast<Opacity_type>(opac->type);
39 opacity_amount_ = opac->opacity.fraction;
40 }
41 const lwo2::FORM::SURF::BLOK::AXIS *axis = dynamic_cast<const lwo2::FORM::SURF::BLOK::AXIS *>(*i);
42 if (axis) {
43 displacement_axis_ = static_cast<Axis_type>(axis->displacement_axis);
44 }
45 }
46 }
47
compile(const lwo2::FORM::SURF::BLOK * blok)48 void Block::compile(const lwo2::FORM::SURF::BLOK *blok)
49 {
50 const lwo2::FORM::SURF::BLOK::IMAP *imap = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP *>(blok->header);
51 if (imap) {
52 type_ = "IMAP";
53 ordinal_ = imap->ordinal;
54
55 // read common parameters
56 read_common_attributes(imap->block_attributes);
57
58 // read imagemap-related attributes
59 for (iff::Chunk_list::const_iterator i=blok->attributes.begin(); i!=blok->attributes.end(); ++i) {
60 const lwo2::FORM::SURF::BLOK::IMAP::TMAP *tmap = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::TMAP *>(*i);
61 if (tmap) {
62 Texture_mapping mapping;
63 for (iff::Chunk_list::const_iterator i=tmap->attributes.begin(); i!=tmap->attributes.end(); ++i) {
64 const lwo2::FORM::SURF::BLOK::IMAP::TMAP::CNTR *cntr = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::TMAP::CNTR *>(*i);
65 if (cntr) {
66 mapping.center_ = osg::Vec3(cntr->vector.X, cntr->vector.Y, cntr->vector.Z);
67 }
68 const lwo2::FORM::SURF::BLOK::IMAP::TMAP::SIZE *size = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::TMAP::SIZE *>(*i);
69 if (size) {
70 mapping.size_ = osg::Vec3(size->vector.X, size->vector.Y, size->vector.Z);
71 }
72 const lwo2::FORM::SURF::BLOK::IMAP::TMAP::ROTA *rota = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::TMAP::ROTA *>(*i);
73 if (rota) {
74 mapping.rotation_ = osg::Vec3(rota->vector.X, rota->vector.Y, rota->vector.Z);
75 }
76 const lwo2::FORM::SURF::BLOK::IMAP::TMAP::CSYS *csys = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::TMAP::CSYS *>(*i);
77 if (csys) {
78 mapping.csys_ = static_cast<Texture_mapping::Coordinate_system_type>(csys->type);
79 }
80 }
81 imap_.mapping = mapping;
82 }
83
84 const lwo2::FORM::SURF::BLOK::IMAP::PROJ *proj = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::PROJ *>(*i);
85 if (proj) {
86 imap_.projection = static_cast<Image_map::Projection_mode>(proj->projection_mode);
87 }
88
89 const lwo2::FORM::SURF::BLOK::IMAP::AXIS *axis = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::AXIS *>(*i);
90 if (axis) {
91 imap_.axis = static_cast<Image_map::Axis_type>(axis->texture_axis);
92 }
93
94 const lwo2::FORM::SURF::BLOK::IMAP::IMAG *imag = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::IMAG *>(*i);
95 if (imag) {
96 imap_.image_map = imag->texture_image.index;
97 }
98
99 const lwo2::FORM::SURF::BLOK::IMAP::WRAP *wrap = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::WRAP *>(*i);
100 if (wrap) {
101 imap_.width_wrap = static_cast<Image_map::Wrap_type>(wrap->width_wrap);
102 imap_.height_wrap = static_cast<Image_map::Wrap_type>(wrap->height_wrap);
103 }
104
105 const lwo2::FORM::SURF::BLOK::IMAP::WRPW *wrpw = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::WRPW *>(*i);
106 if (wrpw) {
107 imap_.wrap_amount_w = wrpw->cycles.fraction;
108 }
109
110 const lwo2::FORM::SURF::BLOK::IMAP::WRPH *wrph = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::WRPH *>(*i);
111 if (wrph) {
112 imap_.wrap_amount_h = wrph->cycles.fraction;
113 }
114
115 const lwo2::FORM::SURF::BLOK::IMAP::VMAP *vmap = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::VMAP *>(*i);
116 if (vmap) {
117 imap_.uv_map = vmap->txuv_map_name;
118 }
119
120 const lwo2::FORM::SURF::BLOK::IMAP::TAMP *tamp = dynamic_cast<const lwo2::FORM::SURF::BLOK::IMAP::TAMP *>(*i);
121 if (tamp) {
122 imap_.texture_amplitude = tamp->amplitude.fraction;
123 }
124 }
125
126 } else {
127 OSG_WARN << "Warning: lwosg::Block: only IMAP (image map) block types are supported, this block will be ignored" << std::endl;
128 }
129 }
130
setup_texture_point(const osg::Vec3 & P) const131 osg::Vec3 Block::setup_texture_point(const osg::Vec3 &P) const
132 {
133 osg::Vec3 Q = P;
134
135 const osg::Vec3 &ypr = imap_.mapping.rotation_;
136 Q -= imap_.mapping.center_;
137 Q = Q * osg::Matrix::rotate(ypr.z(), osg::Vec3(0, 0, -1));
138 Q = Q * osg::Matrix::rotate(ypr.x(), osg::Vec3(0, 1, 0));
139 Q = Q * osg::Matrix::rotate(ypr.y(), osg::Vec3(-1, 0, 0));
140 if (imap_.projection != Image_map::SPHERICAL) {
141 Q.x() *= 1/imap_.mapping.size_.x();
142 Q.y() *= 1/imap_.mapping.size_.y();
143 Q.z() *= 1/imap_.mapping.size_.z();
144 }
145
146 return Q;
147 }
148