AppView.cpp

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/* SPDX-FileCopyrightText: 2008-2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <iostream>
 
#include "AppConfig.h"
#include "AppView.h"
#include "Controller.h"
 
#include "../scene_graph/LineRep.h"
#include "../scene_graph/NodeLight.h"
#include "../scene_graph/NodeShape.h"
#include "../scene_graph/VertexRep.h"
#include "../stroke/Canvas.h"
#include "../system/StringUtils.h"
#include "../view_map/Silhouette.h"
#include "../view_map/ViewMap.h"
 
#include "BLI_math_rotation.h"
 
#include "IMB_imbuf.hh"
#include "IMB_imbuf_types.hh"
 
#if 1  // FRS_antialiasing
#  include "BKE_global.hh"
#  include "DNA_scene_types.h"
#endif
 
#include "FRS_freestyle.h"
 
namespace Freestyle {
 
AppView::AppView(const char * /*iName*/)
{
  _Fovy = DEG2RADF(30.0f);
  _ModelRootNode = new NodeDrawingStyle;
  _SilhouetteRootNode = new NodeDrawingStyle;
  _DebugRootNode = new NodeDrawingStyle;
 
  _RootNode.AddChild(_ModelRootNode);
  _SilhouetteRootNode->setStyle(DrawingStyle::LINES);
  _SilhouetteRootNode->setLightingEnabled(false);
  _SilhouetteRootNode->setLineWidth(2.0f);
  _SilhouetteRootNode->setPointSize(3.0f);
 
  _RootNode.AddChild(_SilhouetteRootNode);
 
  _DebugRootNode->setStyle(DrawingStyle::LINES);
  _DebugRootNode->setLightingEnabled(false);
  _DebugRootNode->setLineWidth(1.0f);
 
  _RootNode.AddChild(_DebugRootNode);
 
  _minBBox = std::min(
      std::min(_ModelRootNode->bbox().getMin()[0], _ModelRootNode->bbox().getMin()[1]),
      _ModelRootNode->bbox().getMin()[2]);
  _maxBBox = std::max(
      std::max(_ModelRootNode->bbox().getMax()[0], _ModelRootNode->bbox().getMax()[1]),
      _ModelRootNode->bbox().getMax()[2]);
 
  _maxAbs = std::max(rabs(_minBBox), rabs(_maxBBox));
  _minAbs = std::min(rabs(_minBBox), rabs(_maxBBox));
 
  _p2DSelectionNode = new NodeDrawingStyle;
  _p2DSelectionNode->setLightingEnabled(false);
  _p2DSelectionNode->setStyle(DrawingStyle::LINES);
  _p2DSelectionNode->setLineWidth(5.0f);
 
  _p2DNode.AddChild(_p2DSelectionNode);
 
  NodeLight *light = new NodeLight;
  _Light.AddChild(light);
}
 
AppView::~AppView()
{
  /*int ref =*//* UNUSED */ _RootNode.destroy();
 
  _Light.destroy();
  /*ref =*//* UNUSED */ _p2DNode.destroy();
}
 
real AppView::distanceToSceneCenter()
{
  BBox<Vec3r> bbox = _ModelRootNode->bbox();
 
  Vec3r v(UNPACK3(g_freestyle.viewpoint));
  v -= 0.5 * (bbox.getMin() + bbox.getMax());
 
  return v.norm();
}
 
real AppView::znear()
{
  BBox<Vec3r> bbox = _ModelRootNode->bbox();
  Vec3r u = bbox.getMin();
  Vec3r v = bbox.getMax();
  Vec3r cameraCenter(UNPACK3(g_freestyle.viewpoint));
 
  Vec3r w1(u[0], u[1], u[2]);
  Vec3r w2(v[0], u[1], u[2]);
  Vec3r w3(u[0], v[1], u[2]);
  Vec3r w4(v[0], v[1], u[2]);
  Vec3r w5(u[0], u[1], v[2]);
  Vec3r w6(v[0], u[1], v[2]);
  Vec3r w7(u[0], v[1], v[2]);
  Vec3r w8(v[0], v[1], v[2]);
 
  real _znear = std::min(
      (w1 - cameraCenter).norm(),
      std::min((w2 - cameraCenter).norm(),
               std::min((w3 - cameraCenter).norm(),
                        std::min((w4 - cameraCenter).norm(),
                                 std::min((w5 - cameraCenter).norm(),
                                          std::min((w6 - cameraCenter).norm(),
                                                   std::min((w7 - cameraCenter).norm(),
                                                            (w8 - cameraCenter).norm())))))));
 
  return std::max(_znear, 0.001);
}
 
real AppView::zfar()
{
  BBox<Vec3r> bbox = _ModelRootNode->bbox();
  Vec3r u = bbox.getMin();
  Vec3r v = bbox.getMax();
  Vec3r cameraCenter(UNPACK3(g_freestyle.viewpoint));
 
  Vec3r w1(u[0], u[1], u[2]);
  Vec3r w2(v[0], u[1], u[2]);
  Vec3r w3(u[0], v[1], u[2]);
  Vec3r w4(v[0], v[1], u[2]);
  Vec3r w5(u[0], u[1], v[2]);
  Vec3r w6(v[0], u[1], v[2]);
  Vec3r w7(u[0], v[1], v[2]);
  Vec3r w8(v[0], v[1], v[2]);
 
  real _zfar = std::max(
      (w1 - cameraCenter).norm(),
      std::max((w2 - cameraCenter).norm(),
               std::max((w3 - cameraCenter).norm(),
                        std::max((w4 - cameraCenter).norm(),
                                 std::max((w5 - cameraCenter).norm(),
                                          std::max((w6 - cameraCenter).norm(),
                                                   std::max((w7 - cameraCenter).norm(),
                                                            (w8 - cameraCenter).norm())))))));
 
  return _zfar;
}
 
real AppView::GetFocalLength()
{
  real Near = std::max(0.1, (real)(-2.0f * _maxAbs + distanceToSceneCenter()));
  return Near;
}
 
} /* namespace Freestyle */