switch to tinyobj and nanovg from assimp and cairo

1 files changed, 0 insertions, 303 deletions

diff --git a/libs/assimp/code/PostProcessing/CalcTangentsProcess.cpp b/libs/assimp/code/PostProcessing/CalcTangentsProcess.cpp
deleted file mode 100644
index b8847e4..0000000
--- a/libs/assimp/code/PostProcessing/CalcTangentsProcess.cpp
+++ /dev/null
@@ -1,303 +0,0 @@
-/*
----------------------------------------------------------------------------
-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 post processing step to calculate
- *  tangents and bitangents for all imported meshes
- */
-
-// internal headers
-#include "CalcTangentsProcess.h"
-#include "ProcessHelper.h"
-#include <assimp/TinyFormatter.h>
-#include <assimp/qnan.h>
-
-using namespace Assimp;
-
-// ------------------------------------------------------------------------------------------------
-// Constructor to be privately used by Importer
-CalcTangentsProcess::CalcTangentsProcess() :
-        configMaxAngle(float(AI_DEG_TO_RAD(45.f))), configSourceUV(0) {
-    // nothing to do here
-}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-CalcTangentsProcess::~CalcTangentsProcess() {
-    // nothing to do here
-}
-
-// ------------------------------------------------------------------------------------------------
-// Returns whether the processing step is present in the given flag field.
-bool CalcTangentsProcess::IsActive(unsigned int pFlags) const {
-    return (pFlags & aiProcess_CalcTangentSpace) != 0;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Executes the post processing step on the given imported data.
-void CalcTangentsProcess::SetupProperties(const Importer *pImp) {
-    ai_assert(nullptr != pImp);
-
-    // get the current value of the property
-    configMaxAngle = pImp->GetPropertyFloat(AI_CONFIG_PP_CT_MAX_SMOOTHING_ANGLE, 45.f);
-    configMaxAngle = std::max(std::min(configMaxAngle, 45.0f), 0.0f);
-    configMaxAngle = AI_DEG_TO_RAD(configMaxAngle);
-
-    configSourceUV = pImp->GetPropertyInteger(AI_CONFIG_PP_CT_TEXTURE_CHANNEL_INDEX, 0);
-}
-
-// ------------------------------------------------------------------------------------------------
-// Executes the post processing step on the given imported data.
-void CalcTangentsProcess::Execute(aiScene *pScene) {
-    ai_assert(nullptr != pScene);
-
-    ASSIMP_LOG_DEBUG("CalcTangentsProcess begin");
-
-    bool bHas = false;
-    for (unsigned int a = 0; a < pScene->mNumMeshes; a++) {
-        if (ProcessMesh(pScene->mMeshes[a], a)) bHas = true;
-    }
-
-    if (bHas) {
-        ASSIMP_LOG_INFO("CalcTangentsProcess finished. Tangents have been calculated");
-    } else {
-        ASSIMP_LOG_DEBUG("CalcTangentsProcess finished");
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// Calculates tangents and bi-tangents for the given mesh
-bool CalcTangentsProcess::ProcessMesh(aiMesh *pMesh, unsigned int meshIndex) {
-    // we assume that the mesh is still in the verbose vertex format where each face has its own set
-    // of vertices and no vertices are shared between faces. Sadly I don't know any quick test to
-    // assert() it here.
-    // assert( must be verbose, dammit);
-
-    if (pMesh->mTangents) // this implies that mBitangents is also there
-        return false;
-
-    // If the mesh consists of lines and/or points but not of
-    // triangles or higher-order polygons the normal vectors
-    // are undefined.
-    if (!(pMesh->mPrimitiveTypes & (aiPrimitiveType_TRIANGLE | aiPrimitiveType_POLYGON))) {
-        ASSIMP_LOG_INFO("Tangents are undefined for line and point meshes");
-        return false;
-    }
-
-    // what we can check, though, is if the mesh has normals and texture coordinates. That's a requirement
-    if (pMesh->mNormals == nullptr) {
-        ASSIMP_LOG_ERROR("Failed to compute tangents; need normals");
-        return false;
-    }
-    if (configSourceUV >= AI_MAX_NUMBER_OF_TEXTURECOORDS || !pMesh->mTextureCoords[configSourceUV]) {
-        ASSIMP_LOG_ERROR("Failed to compute tangents; need UV data in channel", configSourceUV);
-        return false;
-    }
-
-    const float angleEpsilon = 0.9999f;
-
-    std::vector<bool> vertexDone(pMesh->mNumVertices, false);
-    const float qnan = get_qnan();
-
-    // create space for the tangents and bitangents
-    pMesh->mTangents = new aiVector3D[pMesh->mNumVertices];
-    pMesh->mBitangents = new aiVector3D[pMesh->mNumVertices];
-
-    const aiVector3D *meshPos = pMesh->mVertices;
-    const aiVector3D *meshNorm = pMesh->mNormals;
-    const aiVector3D *meshTex = pMesh->mTextureCoords[configSourceUV];
-    aiVector3D *meshTang = pMesh->mTangents;
-    aiVector3D *meshBitang = pMesh->mBitangents;
-
-    // calculate the tangent and bitangent for every face
-    for (unsigned int a = 0; a < pMesh->mNumFaces; a++) {
-        const aiFace &face = pMesh->mFaces[a];
-        if (face.mNumIndices < 3) {
-            // There are less than three indices, thus the tangent vector
-            // is not defined. We are finished with these vertices now,
-            // their tangent vectors are set to qnan.
-            for (unsigned int i = 0; i < face.mNumIndices; ++i) {
-                unsigned int idx = face.mIndices[i];
-                vertexDone[idx] = true;
-                meshTang[idx] = aiVector3D(qnan);
-                meshBitang[idx] = aiVector3D(qnan);
-            }
-
-            continue;
-        }
-
-        // triangle or polygon... we always use only the first three indices. A polygon
-        // is supposed to be planar anyways....
-        // FIXME: (thom) create correct calculation for multi-vertex polygons maybe?
-        const unsigned int p0 = face.mIndices[0], p1 = face.mIndices[1], p2 = face.mIndices[2];
-
-        // position differences p1->p2 and p1->p3
-        aiVector3D v = meshPos[p1] - meshPos[p0], w = meshPos[p2] - meshPos[p0];
-
-        // texture offset p1->p2 and p1->p3
-        float sx = meshTex[p1].x - meshTex[p0].x, sy = meshTex[p1].y - meshTex[p0].y;
-        float tx = meshTex[p2].x - meshTex[p0].x, ty = meshTex[p2].y - meshTex[p0].y;
-        float dirCorrection = (tx * sy - ty * sx) < 0.0f ? -1.0f : 1.0f;
-        // when t1, t2, t3 in same position in UV space, just use default UV direction.
-        if (sx * ty == sy * tx) {
-            sx = 0.0;
-            sy = 1.0;
-            tx = 1.0;
-            ty = 0.0;
-        }
-
-        // tangent points in the direction where to positive X axis of the texture coord's would point in model space
-        // bitangent's points along the positive Y axis of the texture coord's, respectively
-        aiVector3D tangent, bitangent;
-        tangent.x = (w.x * sy - v.x * ty) * dirCorrection;
-        tangent.y = (w.y * sy - v.y * ty) * dirCorrection;
-        tangent.z = (w.z * sy - v.z * ty) * dirCorrection;
-        bitangent.x = (- w.x * sx + v.x * tx) * dirCorrection;
-        bitangent.y = (- w.y * sx + v.y * tx) * dirCorrection;
-        bitangent.z = (- w.z * sx + v.z * tx) * dirCorrection;
-
-        // store for every vertex of that face
-        for (unsigned int b = 0; b < face.mNumIndices; ++b) {
-            unsigned int p = face.mIndices[b];
-
-            // project tangent and bitangent into the plane formed by the vertex' normal
-            aiVector3D localTangent = tangent - meshNorm[p] * (tangent * meshNorm[p]);
-            aiVector3D localBitangent = bitangent - meshNorm[p] * (bitangent * meshNorm[p]) - localTangent * (bitangent * localTangent);
-            localTangent.NormalizeSafe();
-            localBitangent.NormalizeSafe();
-
-            // reconstruct tangent/bitangent according to normal and bitangent/tangent when it's infinite or NaN.
-            bool invalid_tangent = is_special_float(localTangent.x) || is_special_float(localTangent.y) || is_special_float(localTangent.z);
-            bool invalid_bitangent = is_special_float(localBitangent.x) || is_special_float(localBitangent.y) || is_special_float(localBitangent.z);
-            if (invalid_tangent != invalid_bitangent) {
-                if (invalid_tangent) {
-                    localTangent = meshNorm[p] ^ localBitangent;
-                    localTangent.NormalizeSafe();
-                } else {
-                    localBitangent = localTangent ^ meshNorm[p];
-                    localBitangent.NormalizeSafe();
-                }
-            }
-
-            // and write it into the mesh.
-            meshTang[p] = localTangent;
-            meshBitang[p] = localBitangent;
-        }
-    }
-
-    // create a helper to quickly find locally close vertices among the vertex array
-    // FIX: check whether we can reuse the SpatialSort of a previous step
-    SpatialSort *vertexFinder = nullptr;
-    SpatialSort _vertexFinder;
-    float posEpsilon = 10e-6f;
-    if (shared) {
-        std::vector<std::pair<SpatialSort, float>> *avf;
-        shared->GetProperty(AI_SPP_SPATIAL_SORT, avf);
-        if (avf) {
-            std::pair<SpatialSort, float> &blubb = avf->operator[](meshIndex);
-            vertexFinder = &blubb.first;
-            posEpsilon = blubb.second;
-            ;
-        }
-    }
-    if (!vertexFinder) {
-        _vertexFinder.Fill(pMesh->mVertices, pMesh->mNumVertices, sizeof(aiVector3D));
-        vertexFinder = &_vertexFinder;
-        posEpsilon = ComputePositionEpsilon(pMesh);
-    }
-    std::vector<unsigned int> verticesFound;
-
-    const float fLimit = std::cos(configMaxAngle);
-    std::vector<unsigned int> closeVertices;
-
-    // in the second pass we now smooth out all tangents and bitangents at the same local position
-    // if they are not too far off.
-    for (unsigned int a = 0; a < pMesh->mNumVertices; a++) {
-        if (vertexDone[a])
-            continue;
-
-        const aiVector3D &origPos = pMesh->mVertices[a];
-        const aiVector3D &origNorm = pMesh->mNormals[a];
-        const aiVector3D &origTang = pMesh->mTangents[a];
-        const aiVector3D &origBitang = pMesh->mBitangents[a];
-        closeVertices.resize(0);
-
-        // find all vertices close to that position
-        vertexFinder->FindPositions(origPos, posEpsilon, verticesFound);
-
-        closeVertices.reserve(verticesFound.size() + 5);
-        closeVertices.push_back(a);
-
-        // look among them for other vertices sharing the same normal and a close-enough tangent/bitangent
-        for (unsigned int b = 0; b < verticesFound.size(); b++) {
-            unsigned int idx = verticesFound[b];
-            if (vertexDone[idx])
-                continue;
-            if (meshNorm[idx] * origNorm < angleEpsilon)
-                continue;
-            if (meshTang[idx] * origTang < fLimit)
-                continue;
-            if (meshBitang[idx] * origBitang < fLimit)
-                continue;
-
-            // it's similar enough -> add it to the smoothing group
-            closeVertices.push_back(idx);
-            vertexDone[idx] = true;
-        }
-
-        // smooth the tangents and bitangents of all vertices that were found to be close enough
-        aiVector3D smoothTangent(0, 0, 0), smoothBitangent(0, 0, 0);
-        for (unsigned int b = 0; b < closeVertices.size(); ++b) {
-            smoothTangent += meshTang[closeVertices[b]];
-            smoothBitangent += meshBitang[closeVertices[b]];
-        }
-        smoothTangent.Normalize();
-        smoothBitangent.Normalize();
-
-        // and write it back into all affected tangents
-        for (unsigned int b = 0; b < closeVertices.size(); ++b) {
-            meshTang[closeVertices[b]] = smoothTangent;
-            meshBitang[closeVertices[b]] = smoothBitangent;
-        }
-    }
-    return true;
-}