SpinningCube.cpp

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#include "SpinningCube.h"

using namespace vis2;

SpinningCube::SpinningCube(glm::mat4 _modelMatrix, vis2::Shader* _shader)
    : GeometricObject(  _modelMatrix,
                        _shader,
                        generic_positions,
                        (unsigned int) CUBE_VERTEX_COUNT,
                        generic_normlas,
                        (unsigned int) CUBE_VERTEX_COUNT,
                        generic_indices,
                        (unsigned int) CUBE_INDEX_COUNT)
{
}

SpinningCube::~SpinningCube()
{
}

void SpinningCube::update(double _deltaT)
{
    // implements "the spinning cube" by rotating a matrix by &angle in deg around &axis
    this->modelMatrix = glm::rotate(    this->modelMatrix,
                                        45.0f * (float)_deltaT,
                                        glm::vec3(0.0f, 1.0f, 0.0f));
}

void SpinningCube::updateMm(glm::mat4 & _newModelMatrix)
{
    this->modelMatrix = _newModelMatrix;
}

void SpinningCube::draw(glm::mat4 & _projectionMatrix)
{
    GeometricObject::draw(_projectionMatrix);
}

// ------------------- the static arrays --------------------------- //

const float SpinningCube::generic_positions[CUBE_VERTEX_COUNT * 3] =
{
    // Back
    -0.5f, -0.5f, -0.5f,
    -0.5f,  0.5f, -0.5f,
     0.5f,  0.5f, -0.5f,
     0.5f, -0.5f, -0.5f,

     // Front
     -0.5f, -0.5f, 0.5f,
      0.5f, -0.5f, 0.5f,
      0.5f,  0.5f, 0.5f,
     -0.5f,  0.5f, 0.5f,

     // Top
      0.5f,  0.5f,  0.5f,
      0.5f,  0.5f, -0.5f,
     -0.5f,  0.5f, -0.5f,
     -0.5f,  0.5f,  0.5f,

     // Bottom
      0.5f, -0.5f,  0.5f,
     -0.5f, -0.5f,  0.5f,
     -0.5f, -0.5f, -0.5f,
      0.5f, -0.5f,  0.5f,

     // Right
      0.5f,  0.5f,  0.5f,
      0.5f, -0.5f,  0.5f,
      0.5f, -0.5f, -0.5f,
      0.5f,  0.5f, -0.5f,

      // Left
      -0.5f,  0.5f,  0.5f,
      -0.5f,  0.5f, -0.5f,
      -0.5f, -0.5f, -0.5f,
      -0.5f, -0.5f,  0.5f,
    
    
     /*
     for

     #define CUBE_VERTEX_COUNT  8

     we get

     0.5f,  0.5f,  0.5f,
     0.5f,  0.5f, -0.5f,
     0.5f, -0.5f, -0.5f,
     0.5f, -0.5f,  0.5f,

    -0.5f,  0.5f,  0.5f,
    -0.5f,  0.5f, -0.5f,
    -0.5f, -0.5f, -0.5f,
    -0.5f, -0.5f,  0.5f
    */
};

const float SpinningCube::generic_normlas[CUBE_VERTEX_COUNT * 3] = 
{
    // Back 
     0.0f,  0.0f, -1.0f,
     0.0f,  0.0f, -1.0f,
     0.0f,  0.0f, -1.0f,
     0.0f,  0.0f, -1.0f,

    // Front 
     0.0f,  0.0f,  1.0f,
     0.0f,  0.0f,  1.0f,
     0.0f,  0.0f,  1.0f,
     0.0f,  0.0f,  1.0f,

    // Top
     0.0f,  1.0f,  0.0f,
     0.0f,  1.0f,  0.0f,
     0.0f,  1.0f,  0.0f,
     0.0f,  1.0f,  0.0f,

    // Bottom
     0.0f, -1.0f,  0.0f,
     0.0f, -1.0f,  0.0f,
     0.0f, -1.0f,  0.0f,
     0.0f, -1.0f,  0.0f,

    // Right
     1.0f, 0.0f, 0.0f,
     1.0f, 0.0f, 0.0f,
     1.0f, 0.0f, 0.0f,
     1.0f, 0.0f, 0.0f,

    // Left
    -1.0f, 0.0f, 0.0f,
    -1.0f, 0.0f, 0.0f,
    -1.0f, 0.0f, 0.0f,
    -1.0f, 0.0f, 0.0f

};

const unsigned int SpinningCube::generic_indices[CUBE_INDEX_COUNT] =
{
     0,  1,  2,
     0,  2,  3,

     4,  5,  6,
     4,  6,  7,
    
     8,  9, 10,
     8, 10, 11,

    12, 13, 14,
    12, 14, 15,

    16, 17, 18,
    16, 18, 19,

    20, 21, 22,
    20, 22, 23

    /*
     for

     #define CUBE_VERTEX_COUNT  8

     we get

    0, 1, 2,
    0, 2, 3,

    4, 5, 6,
    4, 6, 7,

    0, 1, 4,
    1, 5, 4,

    2, 3, 6,
    3, 7, 6,

    1, 2, 6,
    1, 6, 5,

    0, 4, 7,
    0, 7, 3

    */
};