1 | #ifndef __INTERSECTABLE_H
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2 | #define __INTERSECTABLE_H
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3 |
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4 | #include "AxisAlignedBox3.h"
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5 | #include "Pvs.h"
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6 | #include <set>
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7 | #include "VssRay.h"
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8 |
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9 | namespace GtpVisibilityPreprocessor {
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10 |
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11 | struct VssRayContainer;
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12 | class KdLeaf;
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13 | class BvhLeaf;
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14 | class BvhNode;
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15 | class Intersectable;
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16 | struct Face;
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17 |
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18 |
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19 | struct FaceParentInfo {
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20 | /// intersectable
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21 | Intersectable *mObject;
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22 | /// face index
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23 | int mFaceIndex;
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24 |
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25 | FaceParentInfo(Intersectable *obj, const int fi):
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26 | mObject(obj), mFaceIndex(fi)
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27 | {}
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28 | };
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29 |
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30 |
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31 | class Intersectable {
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32 | public:
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33 | // last mail id -> warning not thread safe!
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34 | // both mailId and mailbox should be unique for each thread!!!
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35 | static int sMailId;
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36 | static int sReservedMailboxes;
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37 |
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38 | /// Mailbox used for traversals
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39 | int mMailbox;
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40 |
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41 | /// unique object Id
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42 | int mId;
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43 |
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44 | /// universal counter
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45 | int mCounter;
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46 |
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47 | /// pointer to the containing bvh leaf
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48 | BvhLeaf *mBvhLeaf;
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49 | //BvhNode *mBvhLeaf;
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50 |
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51 | /// # of references to this instance
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52 | int mReferences;
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53 |
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54 | //////////////////
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55 | // note matt: delete these, they are only taking memory
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56 |
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57 |
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58 | /// object based pvs
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59 | KdPvs mKdPvs;
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60 |
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61 | /// view cell based pvs per object
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62 | ViewCellPvs mViewCellPvs;
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63 |
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64 | ///////////////////////
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65 |
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66 | enum { MESH_INSTANCE,
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67 | TRANSFORMED_MESH_INSTANCE,
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68 | SPHERE,
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69 | VIEW_CELL,
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70 | OGRE_MESH_INSTANCE,
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71 | KD_INTERSECTABLE,
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72 | BVH_INTERSECTABLE,
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73 | TRIANGLE_INTERSECTABLE,
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74 | OBJECTS_INTERSECTABLE
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75 | };
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76 |
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77 | Intersectable(): mMailbox(0), mReferences(0), mBvhLeaf(0), mVssRays(NULL) {}
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78 |
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79 | virtual Intersectable::~Intersectable() {DEL_PTR(mVssRays);}
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80 |
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81 | void SetId(const int id) { mId = id; }
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82 | int GetId() { return mId; }
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83 |
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84 | ////////////////////////////////////////////////
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85 | // Mailing stuff
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86 |
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87 | static void NewMail(const int reserve = 1) {
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88 | sMailId += sReservedMailboxes;
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89 | sReservedMailboxes = reserve;
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90 | }
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91 |
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92 | void Mail() { mMailbox = sMailId; }
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93 | bool Mailed() const { return mMailbox == sMailId; }
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94 |
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95 | void Mail(const int mailbox) { mMailbox = sMailId + mailbox; }
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96 | bool Mailed(const int mailbox) const { return mMailbox == sMailId + mailbox; }
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97 |
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98 | int IncMail() { return ++ mMailbox - sMailId; }
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99 |
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100 | ////////////////////////////////////////////////////
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101 | virtual AxisAlignedBox3 GetBox() const = 0;
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102 | virtual int CastRay(GtpVisibilityPreprocessor::Ray &ray) = 0;
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103 |
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104 | virtual bool IsConvex() const = 0;
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105 | virtual bool IsWatertight() const = 0;
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106 | virtual float IntersectionComplexity() = 0;
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107 |
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108 | virtual int NumberOfFaces() const = 0;
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109 | virtual int Type() const = 0;
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110 | virtual float GetArea() const {return 0; }
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111 | virtual int GetRandomSurfacePoint(Vector3 &point, Vector3 &normal) = 0;
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112 |
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113 | virtual int GetRandomVisibleSurfacePoint(Vector3 &point,
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114 | Vector3 &normal,
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115 | const Vector3 &viewpoint,
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116 | const int maxTries) = 0;
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117 |
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118 | virtual ostream &Describe(ostream &s) = 0;
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119 |
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120 | virtual int GenerateSilhouetteRays(const int nrays,
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121 | const AxisAlignedBox3 &originBox,
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122 | const AxisAlignedBox3 &directionBox, VssRayContainer &rays)
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123 | {
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124 | return 0;
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125 | }
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126 |
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127 | static bool GreaterCounter(const Intersectable *a,
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128 | const Intersectable *b)
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129 | {
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130 | return a->mCounter > b->mCounter;
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131 | }
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132 |
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133 | static string GetTypeName(Intersectable *obj)
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134 | {
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135 | switch(obj->Type())
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136 | {
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137 | case MESH_INSTANCE:
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138 | return "mesh_instance\n";
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139 |
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140 | case TRANSFORMED_MESH_INSTANCE:
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141 | return "transformed_mesh_instance\n";
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142 |
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143 | case SPHERE:
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144 | return "sphere\n";
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145 |
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146 | case VIEW_CELL:
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147 | return "view cell\n";
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148 |
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149 | case OGRE_MESH_INSTANCE:
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150 | return "ogre_mesh_instance\n";
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151 |
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152 | case KD_INTERSECTABLE:
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153 | return "kd_intersectable\n";
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154 |
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155 | default:
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156 | return "unknown\n";
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157 | }
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158 | }
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159 |
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160 | /** Returns normal from the face with the specified index.
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161 | PROBLEM: Does not fit to all intersectable types (e.g., spheres)
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162 | */
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163 | virtual Vector3 GetNormal(const int idx) const { return Vector3(0, 0, 0); }
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164 |
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165 | VssRayContainer *GetOrCreateRays()
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166 | {
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167 | if (!mVssRays)
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168 | mVssRays = new VssRayContainer();
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169 | return mVssRays;
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170 | }
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171 |
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172 | void DelRayRefs()
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173 | {
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174 | DEL_PTR(mVssRays);
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175 | }
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176 |
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177 | protected:
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178 |
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179 | /// some rays piercing this intersectable
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180 | VssRayContainer *mVssRays;
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181 | };
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182 |
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183 |
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184 | }
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185 |
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186 | #endif
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