Es++ Class: OpenGLMeshedPlane

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Source code

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 *  OpenGLMeshedPlane.h
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#pragma once
  
#include <es++/opengl/OpenGLObject.h>
#include <es++/opengl/Vertex3.h>

namespace Es {
  
// PRIMITIVE may take GL_TRIANGLE_STRIP, GL_QUAD_STRIP
 
template <GLenum PRIMITIVE, int WIDTH, size_t MESH_COUNT> 
class OpenGLMeshedPlane {
protected:
 SmartPtr<Vertex3> mesh; 
 size_t  ELEMENT_COUNT;

public:
  OpenGLMeshedPlane( )
  {
    mesh = new Vertex3[MESH_COUNT*MESH_COUNT];
    ELEMENT_COUNT = MESH_COUNT*MESH_COUNT;
  }

  void put(size_t i, float x, float y, float z)
  {
    if (i >= 0 && i < ELEMENT_COUNT) {
      mesh[i].x = x; 
      mesh[i].y = y;
      mesh[i].z = z;
    } else {
      throw IException("Invalid index %d", i);
    }
  }

  void draw(OpenGLGC* gc)
  {
    float fsize = (float)WIDTH;
    for (int i = 0; i <MESH_COUNT-1; i++) {
      gc-> begin(PRIMITIVE);

      for (int j = 0; j<MESH_COUNT; j++) {
        int k = j*MESH_COUNT;
        glVertex3f(mesh[i   + k].x,  mesh[i   + k ].y, mesh[i   + k ].z);
        glVertex3f(mesh[i+1 + k].x,  mesh[i+1 + k ].y, mesh[i+1 + k ].z); 
      }
      gc->end();
    }
  }
};
}


Last modified: 4 Apr 2019

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