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  1. #include <vector>
  2. #include <stdio.h>
  3.  
  4. namespace Test
  5. {
  6.   struct Vector2f{float x, y;};
  7.   struct Vector3f{float x, y, z;};
  8.   struct Tensor3f{float xx, xy, xz, yy, yz, zz;};
  9.   struct Matrix3x3f{float data[9];};
  10.   struct Space2
  11.   {
  12.     typedef Vector2f Vector;
  13.   };
  14.   struct Space3
  15.   {
  16.     typedef Vector3f Vector;
  17.   };
  18.  
  19.  
  20.   template<typename T>
  21.   struct ParticleData{};
  22.  
  23.   template<> 
  24.   struct ParticleData<Space3>
  25.   {
  26.     Matrix3x3f orientation;
  27.     Tensor3f inertiaTensor;
  28.   };
  29.   template<> 
  30.   struct ParticleData<Space2>
  31.   {
  32.     float orientation;
  33.     float invInertia;
  34.   };
  35.  
  36.   template<typename Space>
  37.   struct ParticleSystem
  38.   {
  39.     struct Particle : public ParticleData<Space>
  40.     {
  41.       typename Space::Vector pos, velocity;
  42.     };
  43.  
  44.     void DumpParticle();
  45.  
  46.     void DumpParticles()
  47.     {
  48.       DumpParticle();
  49.     }
  50.  
  51.     std::vector<Particle> particles;
  52.   };
  53.  
  54.   template<>
  55.   void ParticleSystem<Space2>::DumpParticle()
  56.   {
  57.     printf("%f %f", particles[0].orientation, particles[0].invInertia);
  58.   }
  59.  
  60.   template<>
  61.   void ParticleSystem<Space3>::DumpParticle()
  62.   {
  63.     printf("%f %f", particles[0].orientation.data[0], particles[0].inertiaTensor.xx);
  64.   }
  65.  
  66.  
  67. }
  68.  
  69. int main()
  70. {
  71.   Test::ParticleSystem<Test::Space2> sys;
  72.   sys.DumpParticles();
  73.  
  74.   return 0;
  75. }
Runtime error #stdin #stdout 0s 2680KB
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Standard input is empty
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Standard output is empty
https://ideone.com/zLtglA
language:
C++ 4.3.2 (gcc-4.3.2)
created:
11 years ago
visibility:
public

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