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| 7 | |
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| 8 | #include "Surface.h" |
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| 9 | |
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| 10 | #include <osg/Material> |
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| 11 | #include <osg/CullFace> |
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| 12 | #include <osg/Texture2D> |
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| 13 | #include <osg/TexEnvCombine> |
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| 14 | #include <osg/TexGen> |
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| 15 | #include <osg/BlendFunc> |
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| 16 | #include <osg/Notify> |
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| 17 | |
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| 18 | #include <osgFX/SpecularHighlights> |
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| 19 | |
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| 20 | #include <osgDB/ReadFile> |
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| 21 | |
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| 22 | using namespace lwosg; |
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| 23 | |
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| 24 | namespace |
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| 25 | { |
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| 26 | |
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| 27 | osg::Texture::WrapMode osg_wrap_mode(Image_map::Wrap_type w) |
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| 28 | { |
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| 29 | switch (w) { |
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| 30 | case Image_map::RESET: return osg::Texture::CLAMP; |
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| 31 | case Image_map::REPEAT: return osg::Texture::REPEAT; |
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| 32 | case Image_map::MIRROR: return osg::Texture::MIRROR; |
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| 33 | case Image_map::EDGE: return osg::Texture::CLAMP_TO_EDGE; |
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| 34 | default: return osg::Texture::REPEAT; |
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| 35 | }; |
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| 36 | } |
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| 37 | |
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| 38 | } |
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| 39 | |
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| 40 | Surface::Surface() |
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| 41 | : base_color_(0.784f, 0.784f, 0.784f), |
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| 42 | diffuse_(1.0f), |
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| 43 | luminosity_(0), |
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| 44 | specularity_(0), |
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| 45 | reflection_(0), |
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| 46 | transparency_(0), |
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| 47 | translucency_(0), |
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| 48 | glossiness_(0.4f), |
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| 49 | sidedness_(FRONT_ONLY), |
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| 50 | max_smoothing_angle_(0) |
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| 51 | { |
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| 52 | } |
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| 53 | |
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| 54 | Surface::Surface(const lwo2::FORM::SURF *surf, const Clip_map &clips) |
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| 55 | : base_color_(0.784f, 0.784f, 0.784f), |
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| 56 | diffuse_(1.0f), |
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| 57 | luminosity_(0), |
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| 58 | specularity_(0), |
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| 59 | reflection_(0), |
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| 60 | transparency_(0), |
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| 61 | translucency_(0), |
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| 62 | glossiness_(0.4f), |
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| 63 | sidedness_(FRONT_ONLY), |
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| 64 | max_smoothing_angle_(0) |
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| 65 | { |
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| 66 | compile(surf, clips); |
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| 67 | } |
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| 68 | |
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| 69 | void Surface::compile(const lwo2::FORM::SURF *surf, const Clip_map &clips) |
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| 70 | { |
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| 71 | |
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| 72 | stateset_ = 0; |
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| 73 | |
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| 74 | name_ = surf->name; |
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| 75 | |
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| 76 | for (iff::Chunk_list::const_iterator j=surf->attributes.begin(); j!=surf->attributes.end(); ++j) { |
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| 77 | |
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| 78 | const lwo2::FORM::SURF::COLR *colr = dynamic_cast<const lwo2::FORM::SURF::COLR *>(*j); |
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| 79 | if (colr) base_color_ = osg::Vec3(colr->base_color.red, colr->base_color.green, colr->base_color.blue); |
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| 80 | |
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| 81 | const lwo2::FORM::SURF::DIFF *diff = dynamic_cast<const lwo2::FORM::SURF::DIFF *>(*j); |
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| 82 | if (diff) diffuse_ = diff->intensity.fraction; |
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| 83 | |
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| 84 | const lwo2::FORM::SURF::LUMI *lumi = dynamic_cast<const lwo2::FORM::SURF::LUMI *>(*j); |
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| 85 | if (lumi) luminosity_ = lumi->intensity.fraction; |
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| 86 | |
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| 87 | const lwo2::FORM::SURF::SPEC *spec = dynamic_cast<const lwo2::FORM::SURF::SPEC *>(*j); |
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| 88 | if (spec) specularity_ = spec->intensity.fraction; |
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| 89 | |
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| 90 | const lwo2::FORM::SURF::REFL *refl = dynamic_cast<const lwo2::FORM::SURF::REFL *>(*j); |
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| 91 | if (refl) reflection_ = refl->intensity.fraction; |
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| 92 | |
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| 93 | const lwo2::FORM::SURF::TRAN *tran = dynamic_cast<const lwo2::FORM::SURF::TRAN *>(*j); |
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| 94 | if (tran) transparency_ = tran->intensity.fraction; |
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| 95 | |
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| 96 | const lwo2::FORM::SURF::TRNL *trnl = dynamic_cast<const lwo2::FORM::SURF::TRNL *>(*j); |
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| 97 | if (trnl) translucency_ = trnl->intensity.fraction; |
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| 98 | |
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| 99 | const lwo2::FORM::SURF::GLOS *glos = dynamic_cast<const lwo2::FORM::SURF::GLOS *>(*j); |
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| 100 | if (glos) glossiness_ = glos->glossiness.fraction; |
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| 101 | |
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| 102 | const lwo2::FORM::SURF::SIDE *side = dynamic_cast<const lwo2::FORM::SURF::SIDE *>(*j); |
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| 103 | if (side) sidedness_ = static_cast<Sidedness>(side->sidedness); |
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| 104 | |
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| 105 | const lwo2::FORM::SURF::SMAN *sman = dynamic_cast<const lwo2::FORM::SURF::SMAN *>(*j); |
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| 106 | if (sman) max_smoothing_angle_ = sman->max_smoothing_angle.radians; |
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| 107 | |
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| 108 | const lwo2::FORM::SURF::VCOL *vcol = dynamic_cast<const lwo2::FORM::SURF::VCOL *>(*j); |
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| 109 | if (vcol) { |
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| 110 | color_map_intensity_ = vcol->intensity.fraction; |
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| 111 | color_map_type_ = std::string(vcol->vmap_type.id, 4); |
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| 112 | color_map_name_ = vcol->name; |
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| 113 | } |
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| 114 | |
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| 115 | const lwo2::FORM::SURF::BLOK *blok = dynamic_cast<const lwo2::FORM::SURF::BLOK *>(*j); |
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| 116 | if (blok) { |
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| 117 | Block new_block(blok); |
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| 118 | if (new_block.get_type() == "IMAP") { |
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| 119 | Clip_map::const_iterator i = clips.find(new_block.get_image_map().image_map); |
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| 120 | if (i != clips.end()) { |
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| 121 | new_block.get_image_map().clip = &i->second; |
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| 122 | } else { |
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| 123 | OSG_WARN << "Warning: lwosg::Surface: cannot find clip number " << new_block.get_image_map().image_map << std::endl; |
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| 124 | } |
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| 125 | } |
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| 126 | blocks_.insert(Block_map::value_type(new_block.get_ordinal(), new_block)); |
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| 127 | } |
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| 128 | } |
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| 129 | } |
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| 130 | |
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| 131 | void Surface::generate_stateset(unsigned int max_tex_units, bool force_arb_compression, const osgDB::ReaderWriter::Options* db_options) const |
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| 132 | { |
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| 133 | if (!stateset_.valid()) { |
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| 134 | |
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| 135 | stateset_ = new osg::StateSet; |
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| 136 | |
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| 137 | osg::ref_ptr<osg::Material> material = new osg::Material; |
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| 138 | material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(base_color_ * diffuse_, 1-transparency_)); |
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| 139 | material->setAmbient(osg::Material::FRONT_AND_BACK, material->getDiffuse(osg::Material::FRONT_AND_BACK)); |
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| 140 | material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(specularity_, specularity_, specularity_, 1)); |
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| 141 | material->setShininess(osg::Material::FRONT_AND_BACK, powf(2, 10 * glossiness_ + 2)); |
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| 142 | material->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4(base_color_ * luminosity_, 1-transparency_)); |
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| 143 | stateset_->setAttributeAndModes(material.get()); |
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| 144 | |
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| 145 | if (!color_map_name_.empty()) { |
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| 146 | material->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE); |
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| 147 | } |
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| 148 | |
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| 149 | if (transparency_ > 0) { |
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| 150 | osg::ref_ptr<osg::BlendFunc> bf = new osg::BlendFunc; |
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| 151 | bf->setFunction(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA); |
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| 152 | stateset_->setAttributeAndModes(bf.get()); |
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| 153 | stateset_->setRenderingHint(osg::StateSet::TRANSPARENT_BIN); |
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| 154 | } |
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| 155 | |
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| 156 | if (sidedness_ == FRONT_AND_BACK) { |
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| 157 | stateset_->setMode(GL_CULL_FACE, osg::StateAttribute::OFF); |
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| 158 | } else { |
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| 159 | osg::ref_ptr<osg::CullFace> cf = new osg::CullFace; |
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| 160 | switch (sidedness_) { |
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| 161 | case NONE: cf->setMode(osg::CullFace::FRONT_AND_BACK); break; |
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| 162 | case FRONT_ONLY: cf->setMode(osg::CullFace::BACK); break; |
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| 163 | case BACK_ONLY: cf->setMode(osg::CullFace::FRONT); break; |
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| 164 | default: ; |
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| 165 | } |
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| 166 | stateset_->setAttributeAndModes(cf.get()); |
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| 167 | } |
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| 168 | |
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| 169 | std::map< std::string, unsigned int > unitmap; |
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| 170 | unitmap[ "COLR" ] = 0; |
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| 171 | unitmap[ "TRAN" ] = 1; |
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| 172 | unsigned int unit = 0; |
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| 173 | for (Block_map::const_iterator i=blocks_.begin(); i!=blocks_.end(); ++i) { |
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| 174 | |
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| 175 | const Block &block = i->second; |
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| 176 | if (!block.enabled()) { |
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| 177 | continue; |
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| 178 | } |
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| 179 | |
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| 180 | if (block.get_type() == "IMAP") |
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| 181 | { |
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| 182 | std::string channel = block.get_channel(); |
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| 183 | if ( ( channel == "COLR" ) || |
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| 184 | ( channel == "TRAN" ) ) |
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| 185 | { |
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| 186 | unit = unitmap[ channel ]; |
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| 187 | if (block.get_image_map().clip) |
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| 188 | { |
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| 189 | std::string image_file = block.get_image_map().clip->get_still_filename(); |
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| 190 | if (!image_file.empty()) |
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| 191 | { |
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| 192 | |
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| 193 | if (unit >= max_tex_units && max_tex_units > 0) |
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| 194 | { |
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| 195 | OSG_WARN << "Warning: lwosg::Surface: maximum number of texture units (" << max_tex_units << ") has been reached, skipping incoming blocks" << std::endl; |
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| 196 | break; |
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| 197 | } |
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| 198 | |
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| 199 | osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile(image_file, db_options); |
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| 200 | if (!image) break; |
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| 201 | |
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| 202 | osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D; |
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| 203 | if (force_arb_compression) |
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| 204 | texture->setInternalFormatMode(osg::Texture::USE_ARB_COMPRESSION); |
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| 205 | texture->setImage(image.get()); |
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| 206 | texture->setWrap(osg::Texture::WRAP_S, osg_wrap_mode(block.get_image_map().width_wrap)); |
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| 207 | texture->setWrap(osg::Texture::WRAP_T, osg_wrap_mode(block.get_image_map().height_wrap)); |
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| 208 | texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR); |
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| 209 | texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR); |
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| 210 | stateset_->setTextureAttributeAndModes(unit, texture.get()); |
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| 211 | |
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| 212 | osg::ref_ptr<osg::TexEnvCombine> tec = new osg::TexEnvCombine; |
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| 213 | switch (block.get_opacity_type()) |
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| 214 | { |
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| 215 | case Block::NORMAL: |
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| 216 | { |
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| 217 | float s = block.get_opacity_amount(); |
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| 218 | if (unit == 0) |
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| 219 | { |
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| 220 | tec->setCombine_RGB(osg::TexEnvCombine::MODULATE); |
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| 221 | osg::Vec3 color(diffuse_, diffuse_, diffuse_); |
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| 222 | color = color * s + base_color_ * (1 - s); |
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| 223 | material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(color, 1-transparency_)); |
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| 224 | material->setAmbient(osg::Material::FRONT_AND_BACK, material->getDiffuse(osg::Material::FRONT_AND_BACK)); |
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| 225 | material->setColorMode(osg::Material::OFF); |
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| 226 | } |
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| 227 | else |
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| 228 | { |
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| 229 | tec->setCombine_RGB(osg::TexEnvCombine::INTERPOLATE); |
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| 230 | tec->setConstantColor(osg::Vec4(s, s, s, s)); |
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| 231 | } |
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| 232 | } |
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| 233 | break; |
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| 234 | |
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| 235 | case Block::ADDITIVE: |
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| 236 | tec->setCombine_RGB(osg::TexEnvCombine::ADD); |
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| 237 | break; |
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| 238 | |
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| 239 | case Block::SUBTRACTIVE: |
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| 240 | OSG_WARN << "Warning: lwosg::Surface: 'Subtractive' blending mode is not supported, falling back to 'Difference' mode" << std::endl; |
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| 241 | case Block::DIFFERENCE: |
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| 242 | tec->setCombine_RGB(osg::TexEnvCombine::SUBTRACT); |
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| 243 | break; |
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| 244 | |
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| 245 | case Block::MULTIPLY: |
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| 246 | tec->setCombine_RGB(osg::TexEnvCombine::MODULATE); |
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| 247 | break; |
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| 248 | |
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| 249 | case Block::DIVIDE: |
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| 250 | OSG_WARN << "Warning: lwosg::Surface: 'Divide' blending mode is not supported" << std::endl; |
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| 251 | break; |
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| 252 | |
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| 253 | case Block::ALPHA: |
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| 254 | OSG_WARN << "Warning: lwosg::Surface: 'Alpha' blending mode is not supported" << std::endl; |
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| 255 | break; |
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| 256 | |
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| 257 | case Block::TEXTURE_DISPLACEMENT: |
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| 258 | OSG_WARN << "Warning: lwosg::Surface: 'Texture Displacement' blending mode is not supported" << std::endl; |
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| 259 | break; |
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| 260 | |
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| 261 | default: |
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| 262 | break; |
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| 263 | }; |
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| 264 | |
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| 265 | stateset_->setTextureAttributeAndModes(unit, tec.get()); |
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| 266 | ++unit; |
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| 267 | } |
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| 268 | } |
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| 269 | } |
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| 270 | else |
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| 271 | { |
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| 272 | OSG_WARN << "Warning: lwosg::Surface: texture channels of type '" << block.get_channel() << "' are not supported, this block will be ignored" << std::endl; |
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| 273 | } |
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| 274 | } |
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| 275 | } |
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| 276 | } |
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| 277 | } |
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| 278 | |
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| 279 | osg::Group *Surface::apply(osg::Geometry *geo, const VertexMap_map *texture_maps, const VertexMap_map *rgb_maps, const VertexMap_map *rgba_maps, int max_tex_units, bool use_osgfx, bool force_arb_compression, const VertexMap_binding_map &texmap_bindings, const osgDB::ReaderWriter::Options* db_options) const |
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| 280 | { |
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| 281 | int num_points = 0; |
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| 282 | |
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| 283 | if (geo->getVertexArray()) { |
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| 284 | num_points = static_cast<int>(geo->getVertexArray()->getNumElements()); |
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| 285 | } |
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| 286 | |
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| 287 | generate_stateset(max_tex_units, force_arb_compression, db_options); |
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| 288 | geo->setStateSet(stateset_.get()); |
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| 289 | |
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| 290 | int unit = 0; |
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| 291 | for (Block_map::const_iterator i=blocks_.begin(); i!=blocks_.end(); ++i) { |
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| 292 | const Block &block = i->second; |
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| 293 | if (block.get_type() == "IMAP" && block.get_channel() == "COLR" && block.get_image_map().clip) { |
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| 294 | std::string image_file = block.get_image_map().clip->get_still_filename(); |
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| 295 | if (!image_file.empty()) { |
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| 296 | if (block.get_image_map().projection == Image_map::UV) { |
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| 297 | VertexMap_map::const_iterator i = texture_maps->find(block.get_image_map().uv_map); |
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| 298 | if (i != texture_maps->end()) { |
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| 299 | geo->setTexCoordArray(unit, i->second->asVec2Array(num_points)); |
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| 300 | } else { |
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| 301 | OSG_WARN << "Warning: lwosg::Surface: surface '" << name_ << "' needs texture map named '" << block.get_image_map().uv_map << "' but I can't find it" << std::endl; |
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| 302 | } |
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| 303 | } |
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| 304 | ++unit; |
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| 305 | } |
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| 306 | } |
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| 307 | } |
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| 308 | |
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| 309 | for (VertexMap_binding_map::const_iterator vi=texmap_bindings.begin(); vi!=texmap_bindings.end(); ++vi) |
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| 310 | { |
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| 311 | for (VertexMap_map::const_iterator j=texture_maps->begin(); j!=texture_maps->end(); ++j) |
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| 312 | { |
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| 313 | if (j->first == vi->first) |
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| 314 | { |
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| 315 | if (geo->getTexCoordArray(vi->second) != 0) |
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| 316 | { |
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| 317 | OSG_WARN << "Warning: lwosg::Surface: explicing binding of texture map '" << vi->first << "' to texunit " << vi->second << " will replace existing texture map" << std::endl; |
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| 318 | } |
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| 319 | geo->setTexCoordArray(vi->second, j->second->asVec2Array(num_points)); |
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| 320 | } |
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| 321 | else |
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| 322 | { |
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| 323 | OSG_WARN << "Warning: lwosg::Surface: explicit binding of texture map '" << vi->first << "' to texunit " << vi->second << " was requested but there is no such map in this LWO file" << std::endl; |
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| 324 | } |
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| 325 | } |
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| 326 | } |
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| 327 | |
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| 328 | osg::Vec4 color = osg::Vec4(base_color_, 1-transparency_); |
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| 329 | |
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| 330 | const VertexMap_map *color_maps = 0; |
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| 331 | |
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| 332 | if (color_map_type_ == "RGB ") { |
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| 333 | color_maps = rgb_maps; |
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| 334 | } |
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| 335 | |
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| 336 | if (color_map_type_ == "RGBA") { |
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| 337 | color_maps = rgba_maps; |
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| 338 | } |
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| 339 | |
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| 340 | if (color_maps) { |
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| 341 | VertexMap_map::const_iterator i = color_maps->find(color_map_name_); |
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| 342 | if (i != color_maps->end() && !i->second->empty()) { |
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| 343 | geo->setColorArray(i->second->asVec4Array(num_points, color * color_map_intensity_, color * color_map_intensity_)); |
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| 344 | geo->setColorBinding(osg::Geometry::BIND_PER_VERTEX); |
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| 345 | } else { |
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| 346 | OSG_WARN << "Warning: lwosg::Surface: surface '" << name_ << "' needs color map named '" << color_map_name_ << "' but I can't find it" << std::endl; |
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| 347 | } |
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| 348 | } |
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| 349 | |
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| 350 | |
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| 351 | if (use_osgfx && glossiness_ > 0 && specularity_ > 0) { |
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| 352 | if (unit >= max_tex_units && max_tex_units > 0) { |
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| 353 | OSG_WARN << "Warning: lwosg::Surface: can't apply osgFX specular lighting: maximum number of texture units (" << max_tex_units << ") has been reached" << std::endl; |
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| 354 | } else { |
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| 355 | osg::ref_ptr<osgFX::SpecularHighlights> sh = new osgFX::SpecularHighlights; |
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| 356 | sh->setTextureUnit(unit); |
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| 357 | osg::Material *material = dynamic_cast<osg::Material *>(stateset_->getAttribute(osg::StateAttribute::MATERIAL)); |
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| 358 | if (material) { |
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| 359 | sh->setSpecularColor(material->getSpecular(osg::Material::FRONT_AND_BACK)); |
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| 360 | sh->setSpecularExponent(powf(2, 10 * glossiness_ + 2)); |
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| 361 | material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(0, 0, 0, 0)); |
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| 362 | material->setShininess(osg::Material::FRONT_AND_BACK, 0); |
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| 363 | } |
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| 364 | return sh.release(); |
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| 365 | } |
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| 366 | } |
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| 367 | |
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| 368 | return 0; |
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| 369 | } |
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