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Toshihiro Shimizu 890ddd
Toshihiro Shimizu 890ddd
// TnzCore includes
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#include "tgl.h"
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// TnzExt includes
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#include "ext/ttexturesstorage.h"
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#include "ext/plasticdeformerstorage.h"
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// tcg includes
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#include "tcg/tcg_iterator_ops.h"
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#include "ext/meshutils.h"
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//********************************************************************************************
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//    Templated drawing functions
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//********************************************************************************************
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namespace {
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struct NoColorFunction {
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  void faceColor(int f, int m) {}
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  void edgeColor(int e, int m) {}
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  void vertexColor(int v, int m) {}
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};
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//-------------------------------------------------------------------------------
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template 
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          typename ColorFunction>
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inline void tglDrawEdges(const TTextureMesh &mesh,
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                         const VerticesContainer &vertices,
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                         ColorFunction colorFunction) {
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  // Draw the mesh wireframe
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  glBegin(GL_LINES);
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  TTextureMesh::edges_container::const_iterator et, eEnd = mesh.edges().end();
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  for (et = mesh.edges().begin(); et != eEnd; ++et) {
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    const TTextureMesh::edge_type &ed = *et;
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    int v0 = ed.vertex(0), v1 = ed.vertex(1);
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    const PointType &p0 = vertices[v0];
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    const PointType &p1 = vertices[v1];
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    colorFunction.edgeColor(et.index(), -1);
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    colorFunction.vertexColor(v0, -1);
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    glVertex2d(tcg::point_traits<pointtype>::x(p0),</pointtype>
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               tcg::point_traits<pointtype>::y(p0));</pointtype>
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    colorFunction.vertexColor(v1, -1);
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    glVertex2d(tcg::point_traits<pointtype>::x(p1),</pointtype>
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               tcg::point_traits<pointtype>::y(p1));</pointtype>
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  }
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  glEnd();
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}
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//-------------------------------------------------------------------------------
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template <typename colorfunction=""></typename>
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inline void tglDrawFaces(const TMeshImage &meshImage,
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                         ColorFunction colorFunction) {
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  glBegin(GL_TRIANGLES);
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  int m, mCount = meshImage.meshes().size();
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  for (m = 0; m != mCount; ++m) {
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    const TTextureMesh &mesh                  = *meshImage.meshes()[m];
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    const tcg::list<ttexturevertex> &vertices = mesh.vertices();</ttexturevertex>
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    // Draw the mesh wireframe
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    TTextureMesh::faces_container::const_iterator ft, fEnd = mesh.faces().end();
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    for (ft = mesh.faces().begin(); ft != fEnd; ++ft) {
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      int v0, v1, v2;
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      mesh.faceVertices(ft.index(), v0, v1, v2);
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      const TTextureVertex &p0 = vertices[v0];
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      const TTextureVertex &p1 = vertices[v1];
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      const TTextureVertex &p2 = vertices[v2];
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      colorFunction.faceColor(ft.index(), m);
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      colorFunction.vertexColor(v0, m), glVertex2d(p0.P().x, p0.P().y);
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      colorFunction.vertexColor(v1, m), glVertex2d(p1.P().x, p1.P().y);
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      colorFunction.vertexColor(v2, m), glVertex2d(p2.P().x, p2.P().y);
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    }
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  }
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  glEnd();
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}
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//-------------------------------------------------------------------------------
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template <typename colorfunction=""></typename>
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inline void tglDrawFaces(const TMeshImage &meshImage,
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                         const PlasticDeformerDataGroup *group,
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                         ColorFunction colorFunction) {
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  glBegin(GL_TRIANGLES);
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  // Draw faces according to the group's sorted faces list
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  typedef std::vector<std::pair<int, int="">> SortedFacesVector;</std::pair<int,>
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  const SortedFacesVector &sortedFaces     = group->m_sortedFaces;
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  const std::vector<ttexturemeshp> &meshes = meshImage.meshes();</ttexturemeshp>
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  int m = -1;
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  const TTextureMesh *mesh;
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  const double *dstCoords;
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  int v0, v1, v2;
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  // Draw each face individually. Change tile and mesh data only if they change
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  SortedFacesVector::const_iterator sft, sfEnd(sortedFaces.end());
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  for (sft = sortedFaces.begin(); sft != sfEnd; ++sft) {
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    int f = sft->first, m_ = sft->second;
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    if (m != m_) {
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      m = m_;
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      mesh      = meshes[m].getPointer();
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      dstCoords = group->m_datas[m].m_output.get();
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    }
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    mesh->faceVertices(f, v0, v1, v2);
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    const double *d0 = dstCoords + (v0 << 1), *d1 = dstCoords + (v1 << 1),
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                 *d2 = dstCoords + (v2 << 1);
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    colorFunction.faceColor(f, m);
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    colorFunction.vertexColor(v0, m), glVertex2d(*d0, *(d0 + 1));
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    colorFunction.vertexColor(v1, m), glVertex2d(*d1, *(d1 + 1));
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    colorFunction.vertexColor(v2, m), glVertex2d(*d2, *(d2 + 1));
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  }
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  glEnd();
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}
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}  // namespace
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//********************************************************************************************
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//    Mesh Image Utility  functions implementation
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//********************************************************************************************
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void transform(const TMeshImageP &meshImage, const TAffine &aff) {
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  const std::vector<ttexturemeshp> &meshes = meshImage->meshes();</ttexturemeshp>
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  int m, mCount = meshes.size();
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  for (m = 0; m != mCount; ++m) {
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    TTextureMesh &mesh = *meshes[m];
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    tcg::list<ttexturemesh::vertex_type> &vertices = mesh.vertices();</ttexturemesh::vertex_type>
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    tcg::list<ttexturemesh::vertex_type>::iterator vt, vEnd(vertices.end());</ttexturemesh::vertex_type>
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    for (vt = vertices.begin(); vt != vEnd; ++vt) vt->P() = aff * vt->P();
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  }
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}
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//-------------------------------------------------------------------------------
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void tglDrawEdges(const TMeshImage &mi, const PlasticDeformerDataGroup *group) {
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  const std::vector<ttexturemeshp> &meshes = mi.meshes();</ttexturemeshp>
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  int m, mCount = meshes.size();
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  if (group) {
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    for (m = 0; m != mCount; ++m)
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      tglDrawEdges<const *,="" nocolorfunction="" tpointd="" tpointd,="">(</const>
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          *meshes[m], (const TPointD *)group->m_datas[m].m_output.get(),
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          NoColorFunction());
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  } else {
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    for (m = 0; m != mCount; ++m) {
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      const TTextureMesh &mesh = *meshes[m];
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      tglDrawEdges<tcg::list<ttexturemesh::vertex_type>, TTextureVertex,</tcg::list<ttexturemesh::vertex_type>
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                   NoColorFunction>(mesh, mesh.vertices(), NoColorFunction());
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    }
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  }
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}
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//-------------------------------------------------------------------------------
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void tglDrawFaces(const TMeshImage &image,
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                  const PlasticDeformerDataGroup *group) {
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  if (group)
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    tglDrawFaces(image, group, NoColorFunction());
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  else
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    tglDrawFaces(image, NoColorFunction());
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}
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//********************************************************************************************
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//    Colored drawing functions
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//********************************************************************************************
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namespace {
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struct LinearColorFunction {
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  typedef double (*ValueFunc)(const LinearColorFunction *cf, int m,
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                              int primitive);
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public:
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  const TMeshImage &m_meshImg;
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  const PlasticDeformerDataGroup *m_group;
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  double m_min, m_max;
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  double *m_cMin, *m_cMax;
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  double m_dt;
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  bool m_degenerate;
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  ValueFunc m_func;
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public:
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  LinearColorFunction(const TMeshImage &meshImg,
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                      const PlasticDeformerDataGroup *group, double min,
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                      double max, double *cMin, double *cMax, ValueFunc func)
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      : m_meshImg(meshImg)
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      , m_group(group)
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      , m_min(min)
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      , m_max(max)
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      , m_cMin(cMin)
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      , m_cMax(cMax)
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      , m_dt(max - min)
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      , m_degenerate(m_dt < 1e-4)
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      , m_func(func) {}
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  void operator()(int primitive, int m) {
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    if (m_degenerate) {
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      glColor4d(0.5 * (m_cMin[0] + m_cMax[0]), 0.5 * (m_cMin[1] + m_cMax[1]),
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                0.5 * (m_cMin[2] + m_cMax[2]), 0.5 * (m_cMin[3] + m_cMax[3]));
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      return;
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    }
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    double val = m_func(this, m, primitive);
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    double t = (val - m_min) / m_dt, one_t = (m_max - val) / m_dt;
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    glColor4d(
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        one_t * m_cMin[0] + t * m_cMax[0], one_t * m_cMin[1] + t * m_cMax[1],
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        one_t * m_cMin[2] + t * m_cMax[2], one_t * m_cMin[3] + t * m_cMax[3]);
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  }
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};
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//-------------------------------------------------------------------------------
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struct LinearVertexColorFunction final : public LinearColorFunction,
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                                         public NoColorFunction {
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  LinearVertexColorFunction(const TMeshImage &meshImg,
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                            const PlasticDeformerDataGroup *group, double min,
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                            double max, double *cMin, double *cMax,
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                            ValueFunc func)
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      : LinearColorFunction(meshImg, group, min, max, cMin, cMax, func) {}
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  void vertexColor(int v, int m) { operator()(v, m); }
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};
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//-------------------------------------------------------------------------------
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struct LinearFaceColorFunction final : public LinearColorFunction,
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                                       public NoColorFunction {
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  LinearFaceColorFunction(const TMeshImage &meshImg,
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                          const PlasticDeformerDataGroup *group, double min,
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                          double max, double *cMin, double *cMax,
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                          ValueFunc func)
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      : LinearColorFunction(meshImg, group, min, max, cMin, cMax, func) {}
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  void faceColor(int v, int m) { operator()(v, m); }
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};
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}  // namespace
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//===============================================================================
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void tglDrawSO(const TMeshImage &image, double minColor[4], double maxColor[4],
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               const PlasticDeformerDataGroup *group, bool deformedDomain) {
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  struct locals {
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    static double returnSO(const LinearColorFunction *cf, int m, int f) {
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      return cf->m_group->m_datas[m].m_so[f];
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    }
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  };
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  double min = 0.0, max = 0.0;
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  if (group) min = group->m_soMin, max = group->m_soMax;
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  LinearFaceColorFunction colorFunction(image, group, min, max, minColor,
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                                        maxColor, locals::returnSO);
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  if (group && deformedDomain)
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    tglDrawFaces(image, group, colorFunction);
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  else
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    tglDrawFaces(image, colorFunction);
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}
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//-------------------------------------------------------------------------------
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void tglDrawRigidity(const TMeshImage &image, double minColor[4],
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                     double maxColor[4], const PlasticDeformerDataGroup *group,
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                     bool deformedDomain) {
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  struct locals {
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    static double returnRigidity(const LinearColorFunction *cf, int m, int v) {
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      return cf->m_meshImg.meshes()[m]->vertex(v).P().rigidity;
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    }
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  };
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  LinearVertexColorFunction colorFunction(image, group, 1.0, 1e4, minColor,
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                                          maxColor, locals::returnRigidity);
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  if (group && deformedDomain)
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    tglDrawFaces(image, group, colorFunction);
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  else
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    tglDrawFaces(image, colorFunction);
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}
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//***********************************************************************************************
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//    Texturized drawing  implementation
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//***********************************************************************************************
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void tglDraw(const TMeshImage &meshImage, const DrawableTextureData &texData,
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             const TAffine &meshToTexAff,
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             const PlasticDeformerDataGroup &group) {
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  typedef MeshTexturizer::TextureData::TileData TileData;
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  // Prepare OpenGL
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  glPushAttrib(GL_COLOR_BUFFER_BIT | GL_LINE_BIT |
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               GL_HINT_BIT);  // Preserve original status bits
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  glEnable(GL_BLEND);
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  glEnable(GL_LINE_SMOOTH);
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  glLineWidth(1.0f);
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  glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
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  // Prepare variables
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  const std::vector<ttexturemeshp> &meshes = meshImage.meshes();</ttexturemeshp>
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  const TTextureMesh *mesh;
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  typedef std::vector<std::pair<int, int="">> SortedFacesVector;</std::pair<int,>
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  const SortedFacesVector &sortedFaces = group.m_sortedFaces;
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  const MeshTexturizer::TextureData *td = texData.m_textureData;
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  int t, tCount = td->m_tileDatas.size();
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  GLuint texId = -1;
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  int m        = -1;
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  const double *dstCoords;
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  int v0, v1, v2;
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  int e1ovi, e2ovi;  // Edge X's Other Vertex Index (see below)
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  // Prepare each tile's affine
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  std::vector<taffine> tileAff(tCount);</taffine>
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  for (t = 0; t != tCount; ++t) {
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    const TileData &tileData = td->m_tileDatas[t];
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    const TRectD &tileRect   = tileData.m_tileGeometry;
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    tileAff[t] = TScale(1.0 / (tileRect.x1 - tileRect.x0),
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                        1.0 / (tileRect.y1 - tileRect.y0)) *
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                 TTranslation(-tileRect.x0, -tileRect.y0) * meshToTexAff;
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  }
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  // Draw each face individually, according to the group's sorted faces list.
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  // Change tile and mesh data only if they change - improves performance
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  SortedFacesVector::const_iterator sft, sfEnd(sortedFaces.end());
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  for (sft = sortedFaces.begin(); sft != sfEnd; ++sft) {
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    int f = sft->first, m_ = sft->second;
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    if (m != m_) {
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      // Change mesh if different from current
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      m = m_;
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      mesh      = meshes[m].getPointer();
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      dstCoords = group.m_datas[m].m_output.get();
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    }
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    // Draw each face
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    const TTextureMesh::face_type &fc = mesh->face(f);
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    const TTextureMesh::edge_type &ed0 = mesh->edge(fc.edge(0)),
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                                  &ed1 = mesh->edge(fc.edge(1)),
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                                  &ed2 = mesh->edge(fc.edge(2));
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    {
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      v0 = ed0.vertex(0);
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      v1 = ed0.vertex(1);
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      v2 = ed1.vertex((ed1.vertex(0) == v0) | (ed1.vertex(0) == v1));
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      e1ovi = (ed1.vertex(0) == v1) |
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              (ed1.vertex(1) == v1);  // ed1 and ed2 will refer to vertexes
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      e2ovi = 1 - e1ovi;              // with index 2 and these.
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    }
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    const TPointD &p0 = mesh->vertex(v0).P(), &p1 = mesh->vertex(v1).P(),
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                  &p2 = mesh->vertex(v2).P();
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    for (t = 0; t != tCount; ++t) {
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      // Draw face against tile
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      const TileData &tileData = td->m_tileDatas[t];
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      // Map each face vertex to tile coordinates
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      TPointD s[3] = {tileAff[t] * p0, tileAff[t] * p1, tileAff[t] * p2};
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      // Test the face bbox - tile intersection
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      if (std::min({s[0].x, s[1].x, s[2].x}) > 1.0 ||
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          std::min({s[0].y, s[1].y, s[2].y}) > 1.0 ||
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          std::max({s[0].x, s[1].x, s[2].x}) < 0.0 ||
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          std::max({s[0].y, s[1].y, s[2].y}) < 0.0)
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        continue;
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      // If the tile has changed, interrupt the glBegin/glEnd block and bind the
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      // OpenGL texture corresponding to the new tile
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      if (tileData.m_textureId != texId) {
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        texId = tileData.m_textureId;
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        glBindTexture(
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            GL_TEXTURE_2D,
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            tileData
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                .m_textureId);  // This must be OUTSIDE a glBegin/glEnd block
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      }
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      const double *d[3] = {dstCoords + (v0 << 1), dstCoords + (v1 << 1),
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                            dstCoords + (v2 << 1)};
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      /*
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Now, draw primitives. A note about pixel arithmetic, here.
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Since line antialiasing in OpenGL just manipulates output fragments' alpha
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components,
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we must require that the input texture is NONPREMULTIPLIED.
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Furthermore, this function does not rely on the assumption that the output alpha
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component
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is discarded (as it happens when drawing on screen). This means that just using
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a simple
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) is not an option, since this
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way THE INPUT
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SRC ALPHA GETS MULTIPLIED BY ITSELF - see glBlendFunc's docs - and that shows.
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The solution is to separate the rendering of RGB and M components - the formers
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use
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GL_SRC_ALPHA, while the latter uses GL_ONE. The result is a PREMULTIPLIED image.
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*/
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      // First, draw antialiased face edges on the mesh border.
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      bool drawEd0 = (ed0.facesCount() < 2), drawEd1 = (ed1.facesCount() < 2),
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           drawEd2 = (ed2.facesCount() < 2);
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      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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      glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE);
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      glBegin(GL_LINES);
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      {
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        if (drawEd0) {
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          glTexCoord2d(s[0].x, s[0].y), glVertex2d(*d[0], *(d[0] + 1));
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          glTexCoord2d(s[1].x, s[1].y), glVertex2d(*d[1], *(d[1] + 1));
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        }
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        if (drawEd1) {
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          glTexCoord2d(s[e1ovi].x, s[e1ovi].y),
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              glVertex2d(*d[e1ovi], *(d[e1ovi] + 1));
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          glTexCoord2d(s[2].x, s[2].y), glVertex2d(*d[2], *(d[2] + 1));
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        }
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        if (drawEd2) {
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          glTexCoord2d(s[e2ovi].x, s[e2ovi].y),
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              glVertex2d(*d[e2ovi], *(d[e2ovi] + 1));
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          glTexCoord2d(s[2].x, s[2].y), glVertex2d(*d[2], *(d[2] + 1));
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        }
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      }
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      glEnd();
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      glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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      glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
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      glBegin(GL_LINES);
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      {
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        if (drawEd0) {
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          glTexCoord2d(s[0].x, s[0].y), glVertex2d(*d[0], *(d[0] + 1));
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          glTexCoord2d(s[1].x, s[1].y), glVertex2d(*d[1], *(d[1] + 1));
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        }
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        if (drawEd1) {
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          glTexCoord2d(s[e1ovi].x, s[e1ovi].y),
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              glVertex2d(*d[e1ovi], *(d[e1ovi] + 1));
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          glTexCoord2d(s[2].x, s[2].y), glVertex2d(*d[2], *(d[2] + 1));
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        }
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        if (drawEd2) {
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          glTexCoord2d(s[e2ovi].x, s[e2ovi].y),
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              glVertex2d(*d[e2ovi], *(d[e2ovi] + 1));
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          glTexCoord2d(s[2].x, s[2].y), glVertex2d(*d[2], *(d[2] + 1));
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        }
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      }
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      glEnd();
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      // Finally, draw the face
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      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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      glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE);
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      glBegin(GL_TRIANGLES);
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      {
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        glTexCoord2d(s[0].x, s[0].y), glVertex2d(*d[0], *(d[0] + 1));
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        glTexCoord2d(s[1].x, s[1].y), glVertex2d(*d[1], *(d[1] + 1));
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        glTexCoord2d(s[2].x, s[2].y), glVertex2d(*d[2], *(d[2] + 1));
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      }
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      glEnd();
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      glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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      glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
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      glBegin(GL_TRIANGLES);
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      {
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        glTexCoord2d(s[0].x, s[0].y), glVertex2d(*d[0], *(d[0] + 1));
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        glTexCoord2d(s[1].x, s[1].y), glVertex2d(*d[1], *(d[1] + 1));
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        glTexCoord2d(s[2].x, s[2].y), glVertex2d(*d[2], *(d[2] + 1));
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      }
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      glEnd();
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    }
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  }
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  glBindTexture(GL_TEXTURE_2D, 0);  // Unbind texture
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  glPopAttrib();
Toshihiro Shimizu 890ddd
}