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Diffstat (limited to 'libs/assimp/code/AssetLib/LWO/LWOMaterial.cpp')
| -rw-r--r-- | libs/assimp/code/AssetLib/LWO/LWOMaterial.cpp | 844 |
1 files changed, 844 insertions, 0 deletions
diff --git a/libs/assimp/code/AssetLib/LWO/LWOMaterial.cpp b/libs/assimp/code/AssetLib/LWO/LWOMaterial.cpp new file mode 100644 index 0000000..b6f0bcc --- /dev/null +++ b/libs/assimp/code/AssetLib/LWO/LWOMaterial.cpp @@ -0,0 +1,844 @@ +/* +--------------------------------------------------------------------------- +Open Asset Import Library (assimp) +--------------------------------------------------------------------------- + +Copyright (c) 2006-2022, assimp team + + + +All rights reserved. + +Redistribution and use of this software in source and binary forms, +with or without modification, are permitted provided that the following +conditions are met: + +* Redistributions of source code must retain the above + copyright notice, this list of conditions and the + following disclaimer. + +* Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the + following disclaimer in the documentation and/or other + materials provided with the distribution. + +* Neither the name of the assimp team, nor the names of its + contributors may be used to endorse or promote products + derived from this software without specific prior + written permission of the assimp team. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +--------------------------------------------------------------------------- +*/ + +/** @file Implementation of the material oart of the LWO importer class */ + +#ifndef ASSIMP_BUILD_NO_LWO_IMPORTER + +// internal headers +#include "LWOLoader.h" +#include <assimp/ByteSwapper.h> + +using namespace Assimp; + +// ------------------------------------------------------------------------------------------------ +template <class T> +T lerp(const T &one, const T &two, float val) { + return one + (two - one) * val; +} + +// ------------------------------------------------------------------------------------------------ +// Convert a lightwave mapping mode to our's +inline aiTextureMapMode GetMapMode(LWO::Texture::Wrap in) { + switch (in) { + case LWO::Texture::REPEAT: + return aiTextureMapMode_Wrap; + + case LWO::Texture::MIRROR: + return aiTextureMapMode_Mirror; + + case LWO::Texture::RESET: + ASSIMP_LOG_WARN("LWO2: Unsupported texture map mode: RESET"); + + // fall though here + case LWO::Texture::EDGE: + return aiTextureMapMode_Clamp; + } + return (aiTextureMapMode)0; +} + +// ------------------------------------------------------------------------------------------------ +bool LWOImporter::HandleTextures(aiMaterial *pcMat, const TextureList &in, aiTextureType type) { + ai_assert(nullptr != pcMat); + + unsigned int cur = 0, temp = 0; + aiString s; + bool ret = false; + + for (const auto &texture : in) { + if (!texture.enabled || !texture.bCanUse) + continue; + ret = true; + + // Convert lightwave's mapping modes to ours. We let them + // as they are, the GenUVcoords step will compute UV + // channels if they're not there. + + aiTextureMapping mapping = aiTextureMapping_OTHER; + switch (texture.mapMode) { + case LWO::Texture::Planar: + mapping = aiTextureMapping_PLANE; + break; + case LWO::Texture::Cylindrical: + mapping = aiTextureMapping_CYLINDER; + break; + case LWO::Texture::Spherical: + mapping = aiTextureMapping_SPHERE; + break; + case LWO::Texture::Cubic: + mapping = aiTextureMapping_BOX; + break; + case LWO::Texture::FrontProjection: + ASSIMP_LOG_ERROR("LWO2: Unsupported texture mapping: FrontProjection"); + mapping = aiTextureMapping_OTHER; + break; + case LWO::Texture::UV: { + if (UINT_MAX == texture.mRealUVIndex) { + // We have no UV index for this texture, so we can't display it + continue; + } + + // add the UV source index + temp = texture.mRealUVIndex; + pcMat->AddProperty<int>((int *)&temp, 1, AI_MATKEY_UVWSRC(type, cur)); + + mapping = aiTextureMapping_UV; + } break; + default: + ai_assert(false); + }; + + if (mapping != aiTextureMapping_UV) { + // Setup the main axis + aiVector3D v; + switch (texture.majorAxis) { + case Texture::AXIS_X: + v = aiVector3D(1.0, 0.0, 0.0); + break; + case Texture::AXIS_Y: + v = aiVector3D(0.0, 1.0, 0.0); + break; + default: // case Texture::AXIS_Z: + v = aiVector3D(0.0, 0.0, 1.0); + break; + } + + pcMat->AddProperty(&v, 1, AI_MATKEY_TEXMAP_AXIS(type, cur)); + + // Setup UV scalings for cylindric and spherical projections + if (mapping == aiTextureMapping_CYLINDER || mapping == aiTextureMapping_SPHERE) { + aiUVTransform trafo; + trafo.mScaling.x = texture.wrapAmountW; + trafo.mScaling.y = texture.wrapAmountH; + + static_assert(sizeof(aiUVTransform) / sizeof(ai_real) == 5, "sizeof(aiUVTransform)/sizeof(ai_real) == 5"); + pcMat->AddProperty(&trafo, 1, AI_MATKEY_UVTRANSFORM(type, cur)); + } + ASSIMP_LOG_VERBOSE_DEBUG("LWO2: Setting up non-UV mapping"); + } + + // The older LWOB format does not use indirect references to clips. + // The file name of a texture is directly specified in the tex chunk. + if (mIsLWO2) { + // find the corresponding clip (take the last one if multiple + // share the same index) + ClipList::iterator end = mClips.end(), candidate = end; + temp = texture.mClipIdx; + for (ClipList::iterator clip = mClips.begin(); clip != end; ++clip) { + if ((*clip).idx == temp) { + candidate = clip; + } + } + if (candidate == end) { + ASSIMP_LOG_ERROR("LWO2: Clip index is out of bounds"); + temp = 0; + + // fixme: apparently some LWO files shipping with Doom3 don't + // have clips at all ... check whether that's true or whether + // it's a bug in the loader. + + s.Set("$texture.png"); + + //continue; + } else { + if (Clip::UNSUPPORTED == (*candidate).type) { + ASSIMP_LOG_ERROR("LWO2: Clip type is not supported"); + continue; + } + AdjustTexturePath((*candidate).path); + s.Set((*candidate).path); + + // Additional image settings + int flags = 0; + if ((*candidate).negate) { + flags |= aiTextureFlags_Invert; + } + pcMat->AddProperty(&flags, 1, AI_MATKEY_TEXFLAGS(type, cur)); + } + } else { + std::string ss = texture.mFileName; + if (!ss.length()) { + ASSIMP_LOG_WARN("LWOB: Empty file name"); + continue; + } + AdjustTexturePath(ss); + s.Set(ss); + } + pcMat->AddProperty(&s, AI_MATKEY_TEXTURE(type, cur)); + + // add the blend factor + pcMat->AddProperty<float>(&texture.mStrength, 1, AI_MATKEY_TEXBLEND(type, cur)); + + // add the blend operation + switch (texture.blendType) { + case LWO::Texture::Normal: + case LWO::Texture::Multiply: + temp = (unsigned int)aiTextureOp_Multiply; + break; + + case LWO::Texture::Subtractive: + case LWO::Texture::Difference: + temp = (unsigned int)aiTextureOp_Subtract; + break; + + case LWO::Texture::Divide: + temp = (unsigned int)aiTextureOp_Divide; + break; + + case LWO::Texture::Additive: + temp = (unsigned int)aiTextureOp_Add; + break; + + default: + temp = (unsigned int)aiTextureOp_Multiply; + ASSIMP_LOG_WARN("LWO2: Unsupported texture blend mode: alpha or displacement"); + } + // Setup texture operation + pcMat->AddProperty<int>((int *)&temp, 1, AI_MATKEY_TEXOP(type, cur)); + + // setup the mapping mode + int mapping_ = static_cast<int>(mapping); + pcMat->AddProperty<int>(&mapping_, 1, AI_MATKEY_MAPPING(type, cur)); + + // add the u-wrapping + temp = (unsigned int)GetMapMode(texture.wrapModeWidth); + pcMat->AddProperty<int>((int *)&temp, 1, AI_MATKEY_MAPPINGMODE_U(type, cur)); + + // add the v-wrapping + temp = (unsigned int)GetMapMode(texture.wrapModeHeight); + pcMat->AddProperty<int>((int *)&temp, 1, AI_MATKEY_MAPPINGMODE_V(type, cur)); + + ++cur; + } + return ret; +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::ConvertMaterial(const LWO::Surface &surf, aiMaterial *pcMat) { + // copy the name of the surface + aiString st; + st.Set(surf.mName); + pcMat->AddProperty(&st, AI_MATKEY_NAME); + + const int i = surf.bDoubleSided ? 1 : 0; + pcMat->AddProperty(&i, 1, AI_MATKEY_TWOSIDED); + + // add the refraction index and the bump intensity + pcMat->AddProperty(&surf.mIOR, 1, AI_MATKEY_REFRACTI); + pcMat->AddProperty(&surf.mBumpIntensity, 1, AI_MATKEY_BUMPSCALING); + + aiShadingMode m; + if (surf.mSpecularValue && surf.mGlossiness) { + float fGloss; + if (mIsLWO2) { + fGloss = std::pow(surf.mGlossiness * ai_real(10.0) + ai_real(2.0), ai_real(2.0)); + } else { + if (16.0 >= surf.mGlossiness) + fGloss = 6.0; + else if (64.0 >= surf.mGlossiness) + fGloss = 20.0; + else if (256.0 >= surf.mGlossiness) + fGloss = 50.0; + else + fGloss = 80.0; + } + + pcMat->AddProperty(&surf.mSpecularValue, 1, AI_MATKEY_SHININESS_STRENGTH); + pcMat->AddProperty(&fGloss, 1, AI_MATKEY_SHININESS); + m = aiShadingMode_Phong; + } else + m = aiShadingMode_Gouraud; + + // specular color + aiColor3D clr = lerp(aiColor3D(1.0, 1.0, 1.0), surf.mColor, surf.mColorHighlights); + pcMat->AddProperty(&clr, 1, AI_MATKEY_COLOR_SPECULAR); + pcMat->AddProperty(&surf.mSpecularValue, 1, AI_MATKEY_SHININESS_STRENGTH); + + // emissive color + // luminosity is not really the same but it affects the surface in a similar way. Some scaling looks good. + clr.g = clr.b = clr.r = surf.mLuminosity * ai_real(0.8); + pcMat->AddProperty<aiColor3D>(&clr, 1, AI_MATKEY_COLOR_EMISSIVE); + + // opacity ... either additive or default-blended, please + if (0.0 != surf.mAdditiveTransparency) { + const int add = aiBlendMode_Additive; + pcMat->AddProperty(&surf.mAdditiveTransparency, 1, AI_MATKEY_OPACITY); + pcMat->AddProperty(&add, 1, AI_MATKEY_BLEND_FUNC); + } else if (10e10f != surf.mTransparency) { + const int def = aiBlendMode_Default; + const float f = 1.0f - surf.mTransparency; + pcMat->AddProperty(&f, 1, AI_MATKEY_OPACITY); + pcMat->AddProperty(&def, 1, AI_MATKEY_BLEND_FUNC); + } + + // ADD TEXTURES to the material + // TODO: find out how we can handle COLOR textures correctly... + bool b = HandleTextures(pcMat, surf.mColorTextures, aiTextureType_DIFFUSE); + b = (b || HandleTextures(pcMat, surf.mDiffuseTextures, aiTextureType_DIFFUSE)); + HandleTextures(pcMat, surf.mSpecularTextures, aiTextureType_SPECULAR); + HandleTextures(pcMat, surf.mGlossinessTextures, aiTextureType_SHININESS); + HandleTextures(pcMat, surf.mBumpTextures, aiTextureType_HEIGHT); + HandleTextures(pcMat, surf.mOpacityTextures, aiTextureType_OPACITY); + HandleTextures(pcMat, surf.mReflectionTextures, aiTextureType_REFLECTION); + + // Now we need to know which shader to use .. iterate through the shader list of + // the surface and search for a name which we know ... + for (const auto &shader : surf.mShaders) { + if (shader.functionName == "LW_SuperCelShader" || shader.functionName == "AH_CelShader") { + ASSIMP_LOG_INFO("LWO2: Mapping LW_SuperCelShader/AH_CelShader to aiShadingMode_Toon"); + + m = aiShadingMode_Toon; + break; + } else if (shader.functionName == "LW_RealFresnel" || shader.functionName == "LW_FastFresnel") { + ASSIMP_LOG_INFO("LWO2: Mapping LW_RealFresnel/LW_FastFresnel to aiShadingMode_Fresnel"); + + m = aiShadingMode_Fresnel; + break; + } else { + ASSIMP_LOG_WARN("LWO2: Unknown surface shader: ", shader.functionName); + } + } + if (surf.mMaximumSmoothAngle <= 0.0) + m = aiShadingMode_Flat; + int m_ = static_cast<int>(m); + pcMat->AddProperty(&m_, 1, AI_MATKEY_SHADING_MODEL); + + // (the diffuse value is just a scaling factor) + // If a diffuse texture is set, we set this value to 1.0 + clr = (b && false ? aiColor3D(1.0, 1.0, 1.0) : surf.mColor); + clr.r *= surf.mDiffuseValue; + clr.g *= surf.mDiffuseValue; + clr.b *= surf.mDiffuseValue; + pcMat->AddProperty<aiColor3D>(&clr, 1, AI_MATKEY_COLOR_DIFFUSE); +} + +// ------------------------------------------------------------------------------------------------ +char LWOImporter::FindUVChannels(LWO::TextureList &list, + LWO::Layer & /*layer*/, LWO::UVChannel &uv, unsigned int next) { + char ret = 0; + for (auto &texture : list) { + + // Ignore textures with non-UV mappings for the moment. + if (!texture.enabled || !texture.bCanUse || texture.mapMode != LWO::Texture::UV) { + continue; + } + + if (texture.mUVChannelIndex == uv.name) { + ret = 1; + + // got it. + if (texture.mRealUVIndex == UINT_MAX || texture.mRealUVIndex == next) { + texture.mRealUVIndex = next; + } else { + // channel mismatch. need to duplicate the material. + ASSIMP_LOG_WARN("LWO: Channel mismatch, would need to duplicate surface [design bug]"); + + // TODO + } + } + } + return ret; +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::FindUVChannels(LWO::Surface &surf, + LWO::SortedRep &sorted, LWO::Layer &layer, + unsigned int out[AI_MAX_NUMBER_OF_TEXTURECOORDS]) { + unsigned int next = 0, extra = 0, num_extra = 0; + + // Check whether we have an UV entry != 0 for one of the faces in 'sorted' + for (unsigned int i = 0; i < layer.mUVChannels.size(); ++i) { + LWO::UVChannel &uv = layer.mUVChannels[i]; + + for (LWO::SortedRep::const_iterator it = sorted.begin(); it != sorted.end(); ++it) { + + LWO::Face &face = layer.mFaces[*it]; + + for (unsigned int n = 0; n < face.mNumIndices; ++n) { + unsigned int idx = face.mIndices[n]; + + if (uv.abAssigned[idx] && ((aiVector2D *)&uv.rawData[0])[idx] != aiVector2D()) { + + if (extra >= AI_MAX_NUMBER_OF_TEXTURECOORDS) { + + ASSIMP_LOG_ERROR("LWO: Maximum number of UV channels for " + "this mesh reached. Skipping channel \'" + + uv.name + "\'"); + + } else { + // Search through all textures assigned to 'surf' and look for this UV channel + char had = 0; + had |= FindUVChannels(surf.mColorTextures, layer, uv, next); + had |= FindUVChannels(surf.mDiffuseTextures, layer, uv, next); + had |= FindUVChannels(surf.mSpecularTextures, layer, uv, next); + had |= FindUVChannels(surf.mGlossinessTextures, layer, uv, next); + had |= FindUVChannels(surf.mOpacityTextures, layer, uv, next); + had |= FindUVChannels(surf.mBumpTextures, layer, uv, next); + had |= FindUVChannels(surf.mReflectionTextures, layer, uv, next); + + // We have a texture referencing this UV channel so we have to take special care + // and are willing to drop unreferenced channels in favour of it. + if (had != 0) { + if (num_extra) { + + for (unsigned int a = next; a < std::min(extra, AI_MAX_NUMBER_OF_TEXTURECOORDS - 1u); ++a) { + out[a + 1] = out[a]; + } + } + ++extra; + out[next++] = i; + } + // Bah ... seems not to be used at all. Push to end if enough space is available. + else { + out[extra++] = i; + ++num_extra; + } + } + it = sorted.end() - 1; + break; + } + } + } + } + if (extra < AI_MAX_NUMBER_OF_TEXTURECOORDS) { + out[extra] = UINT_MAX; + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::FindVCChannels(const LWO::Surface &surf, LWO::SortedRep &sorted, const LWO::Layer &layer, + unsigned int out[AI_MAX_NUMBER_OF_COLOR_SETS]) { + unsigned int next = 0; + + // Check whether we have an vc entry != 0 for one of the faces in 'sorted' + for (unsigned int i = 0; i < layer.mVColorChannels.size(); ++i) { + const LWO::VColorChannel &vc = layer.mVColorChannels[i]; + + if (surf.mVCMap == vc.name) { + // The vertex color map is explicitly requested by the surface so we need to take special care of it + for (unsigned int a = 0; a < std::min(next, AI_MAX_NUMBER_OF_COLOR_SETS - 1u); ++a) { + out[a + 1] = out[a]; + } + out[0] = i; + ++next; + } else { + + for (LWO::SortedRep::iterator it = sorted.begin(); it != sorted.end(); ++it) { + const LWO::Face &face = layer.mFaces[*it]; + + for (unsigned int n = 0; n < face.mNumIndices; ++n) { + unsigned int idx = face.mIndices[n]; + + if (vc.abAssigned[idx] && ((aiColor4D *)&vc.rawData[0])[idx] != aiColor4D(0.0, 0.0, 0.0, 1.0)) { + if (next >= AI_MAX_NUMBER_OF_COLOR_SETS) { + + ASSIMP_LOG_ERROR("LWO: Maximum number of vertex color channels for " + "this mesh reached. Skipping channel \'" + + vc.name + "\'"); + + } else { + out[next++] = i; + } + it = sorted.end() - 1; + break; + } + } + } + } + } + if (next != AI_MAX_NUMBER_OF_COLOR_SETS) { + out[next] = UINT_MAX; + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2ImageMap(unsigned int size, LWO::Texture &tex) { + LE_NCONST uint8_t *const end = mFileBuffer + size; + while (true) { + if (mFileBuffer + 6 >= end) break; + LE_NCONST IFF::SubChunkHeader head = IFF::LoadSubChunk(mFileBuffer); + + if (mFileBuffer + head.length > end) + throw DeadlyImportError("LWO2: Invalid SURF.BLOCK chunk length"); + + uint8_t *const next = mFileBuffer + head.length; + switch (head.type) { + case AI_LWO_PROJ: + tex.mapMode = (Texture::MappingMode)GetU2(); + break; + case AI_LWO_WRAP: + tex.wrapModeWidth = (Texture::Wrap)GetU2(); + tex.wrapModeHeight = (Texture::Wrap)GetU2(); + break; + case AI_LWO_AXIS: + tex.majorAxis = (Texture::Axes)GetU2(); + break; + case AI_LWO_IMAG: + tex.mClipIdx = GetU2(); + break; + case AI_LWO_VMAP: + GetS0(tex.mUVChannelIndex, head.length); + break; + case AI_LWO_WRPH: + tex.wrapAmountH = GetF4(); + break; + case AI_LWO_WRPW: + tex.wrapAmountW = GetF4(); + break; + } + mFileBuffer = next; + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2Procedural(unsigned int /*size*/, LWO::Texture &tex) { + // --- not supported at the moment + ASSIMP_LOG_ERROR("LWO2: Found procedural texture, this is not supported"); + tex.bCanUse = false; +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2Gradient(unsigned int /*size*/, LWO::Texture &tex) { + // --- not supported at the moment + ASSIMP_LOG_ERROR("LWO2: Found gradient texture, this is not supported"); + tex.bCanUse = false; +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2TextureHeader(unsigned int size, LWO::Texture &tex) { + LE_NCONST uint8_t *const end = mFileBuffer + size; + + // get the ordinal string + GetS0(tex.ordinal, size); + + // we could crash later if this is an empty string ... + if (!tex.ordinal.length()) { + ASSIMP_LOG_ERROR("LWO2: Ill-formed SURF.BLOK ordinal string"); + tex.ordinal = "\x00"; + } + while (true) { + if (mFileBuffer + 6 >= end) break; + const IFF::SubChunkHeader head = IFF::LoadSubChunk(mFileBuffer); + + if (mFileBuffer + head.length > end) + throw DeadlyImportError("LWO2: Invalid texture header chunk length"); + + uint8_t *const next = mFileBuffer + head.length; + switch (head.type) { + case AI_LWO_CHAN: + tex.type = GetU4(); + break; + case AI_LWO_ENAB: + tex.enabled = GetU2() ? true : false; + break; + case AI_LWO_OPAC: + tex.blendType = (Texture::BlendType)GetU2(); + tex.mStrength = GetF4(); + break; + } + mFileBuffer = next; + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2TextureBlock(LE_NCONST IFF::SubChunkHeader *head, unsigned int size) { + ai_assert(!mSurfaces->empty()); + LWO::Surface &surf = mSurfaces->back(); + LWO::Texture tex; + + // load the texture header + LoadLWO2TextureHeader(head->length, tex); + size -= head->length + 6; + + // now get the exact type of the texture + switch (head->type) { + case AI_LWO_PROC: + LoadLWO2Procedural(size, tex); + break; + case AI_LWO_GRAD: + LoadLWO2Gradient(size, tex); + break; + case AI_LWO_IMAP: + LoadLWO2ImageMap(size, tex); + } + + // get the destination channel + TextureList *listRef = nullptr; + switch (tex.type) { + case AI_LWO_COLR: + listRef = &surf.mColorTextures; + break; + case AI_LWO_DIFF: + listRef = &surf.mDiffuseTextures; + break; + case AI_LWO_SPEC: + listRef = &surf.mSpecularTextures; + break; + case AI_LWO_GLOS: + listRef = &surf.mGlossinessTextures; + break; + case AI_LWO_BUMP: + listRef = &surf.mBumpTextures; + break; + case AI_LWO_TRAN: + listRef = &surf.mOpacityTextures; + break; + case AI_LWO_REFL: + listRef = &surf.mReflectionTextures; + break; + default: + ASSIMP_LOG_WARN("LWO2: Encountered unknown texture type"); + return; + } + + // now attach the texture to the parent surface - sort by ordinal string + for (TextureList::iterator it = listRef->begin(); it != listRef->end(); ++it) { + if (::strcmp(tex.ordinal.c_str(), (*it).ordinal.c_str()) < 0) { + listRef->insert(it, tex); + return; + } + } + listRef->push_back(tex); +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2ShaderBlock(LE_NCONST IFF::SubChunkHeader * /*head*/, unsigned int size) { + LE_NCONST uint8_t *const end = mFileBuffer + size; + + ai_assert(!mSurfaces->empty()); + LWO::Surface &surf = mSurfaces->back(); + LWO::Shader shader; + + // get the ordinal string + GetS0(shader.ordinal, size); + + // we could crash later if this is an empty string ... + if (!shader.ordinal.length()) { + ASSIMP_LOG_ERROR("LWO2: Ill-formed SURF.BLOK ordinal string"); + shader.ordinal = "\x00"; + } + + // read the header + while (true) { + if (mFileBuffer + 6 >= end) break; + const IFF::SubChunkHeader head = IFF::LoadSubChunk(mFileBuffer); + + if (mFileBuffer + head.length > end) + throw DeadlyImportError("LWO2: Invalid shader header chunk length"); + + uint8_t *const next = mFileBuffer + head.length; + switch (head.type) { + case AI_LWO_ENAB: + shader.enabled = GetU2() ? true : false; + break; + + case AI_LWO_FUNC: + GetS0(shader.functionName, head.length); + } + mFileBuffer = next; + } + + // now attach the shader to the parent surface - sort by ordinal string + for (ShaderList::iterator it = surf.mShaders.begin(); it != surf.mShaders.end(); ++it) { + if (::strcmp(shader.ordinal.c_str(), (*it).ordinal.c_str()) < 0) { + surf.mShaders.insert(it, shader); + return; + } + } + surf.mShaders.push_back(shader); +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2Surface(unsigned int size) { + LE_NCONST uint8_t *const end = mFileBuffer + size; + + mSurfaces->push_back(LWO::Surface()); + LWO::Surface &surf = mSurfaces->back(); + + GetS0(surf.mName, size); + + // check whether this surface was derived from any other surface + std::string derived; + GetS0(derived, (unsigned int)(end - mFileBuffer)); + if (derived.length()) { + // yes, find this surface + for (SurfaceList::iterator it = mSurfaces->begin(), itEnd = mSurfaces->end() - 1; it != itEnd; ++it) { + if ((*it).mName == derived) { + // we have it ... + surf = *it; + derived.clear(); + break; + } + } + if (derived.size()) { + ASSIMP_LOG_WARN("LWO2: Unable to find source surface: ", derived); + } + } + + while (true) { + if (mFileBuffer + 6 >= end) + break; + const IFF::SubChunkHeader head = IFF::LoadSubChunk(mFileBuffer); + + if (mFileBuffer + head.length > end) + throw DeadlyImportError("LWO2: Invalid surface chunk length"); + + uint8_t *const next = mFileBuffer + head.length; + switch (head.type) { + // diffuse color + case AI_LWO_COLR: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, COLR, 12); + surf.mColor.r = GetF4(); + surf.mColor.g = GetF4(); + surf.mColor.b = GetF4(); + break; + } + // diffuse strength ... hopefully + case AI_LWO_DIFF: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, DIFF, 4); + surf.mDiffuseValue = GetF4(); + break; + } + // specular strength ... hopefully + case AI_LWO_SPEC: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, SPEC, 4); + surf.mSpecularValue = GetF4(); + break; + } + // transparency + case AI_LWO_TRAN: { + // transparency explicitly disabled? + if (surf.mTransparency == 10e10f) + break; + + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, TRAN, 4); + surf.mTransparency = GetF4(); + break; + } + // additive transparency + case AI_LWO_ADTR: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, ADTR, 4); + surf.mAdditiveTransparency = GetF4(); + break; + } + // wireframe mode + case AI_LWO_LINE: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, LINE, 2); + if (GetU2() & 0x1) + surf.mWireframe = true; + break; + } + // glossiness + case AI_LWO_GLOS: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, GLOS, 4); + surf.mGlossiness = GetF4(); + break; + } + // bump intensity + case AI_LWO_BUMP: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, BUMP, 4); + surf.mBumpIntensity = GetF4(); + break; + } + // color highlights + case AI_LWO_CLRH: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, CLRH, 4); + surf.mColorHighlights = GetF4(); + break; + } + // index of refraction + case AI_LWO_RIND: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, RIND, 4); + surf.mIOR = GetF4(); + break; + } + // polygon sidedness + case AI_LWO_SIDE: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, SIDE, 2); + surf.bDoubleSided = (3 == GetU2()); + break; + } + // maximum smoothing angle + case AI_LWO_SMAN: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, SMAN, 4); + surf.mMaximumSmoothAngle = std::fabs(GetF4()); + break; + } + // vertex color channel to be applied to the surface + case AI_LWO_VCOL: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, VCOL, 12); + surf.mDiffuseValue *= GetF4(); // strength + ReadVSizedIntLWO2(mFileBuffer); // skip envelope + surf.mVCMapType = GetU4(); // type of the channel + + // name of the channel + GetS0(surf.mVCMap, (unsigned int)(next - mFileBuffer)); + break; + } + // surface bock entry + case AI_LWO_BLOK: { + AI_LWO_VALIDATE_CHUNK_LENGTH(head.length, BLOK, 4); + IFF::SubChunkHeader head2 = IFF::LoadSubChunk(mFileBuffer); + + switch (head2.type) { + case AI_LWO_PROC: + case AI_LWO_GRAD: + case AI_LWO_IMAP: + LoadLWO2TextureBlock(&head2, head.length); + break; + case AI_LWO_SHDR: + LoadLWO2ShaderBlock(&head2, head.length); + break; + + default: + ASSIMP_LOG_WARN("LWO2: Found an unsupported surface BLOK"); + }; + + break; + } + } + mFileBuffer = next; + } +} + +#endif // !! ASSIMP_BUILD_NO_X_IMPORTER |