Src/QtGeoViewer/GeometryVBO.cpp

   1 #include "stdafx.h"
   2 #include "GeometryVBO.h"
   3
   4 #include "Shader/ShaderInterface.h"
   5
   6 #define VBO_BUFFER_OFFSET(bytes) ((GLubyte *)NULL + (bytes))
   7
   8
   9
  10 GeometryVBO::GeometryVBO(void) :
  11         m_Vertex(GL_ARRAY_BUFFER),
  12         m_Normal(GL_ARRAY_BUFFER),
  13         m_Texture(GL_ARRAY_BUFFER),
  14         m_VCol(GL_ARRAY_BUFFER),
  15         m_Tangents(GL_ARRAY_BUFFER),
  16         m_Index(GL_ELEMENT_ARRAY_BUFFER)
  17 {
  18 }
  19
  20 void GeometryVBO::Release(void)
  21 {
  22         m_Vertex.ReleaseBufferElement();
  23         m_Normal.ReleaseBufferElement();
  24         m_Texture.ReleaseBufferElement();
  25         m_VCol.ReleaseBufferElement();
  26         m_Tangents.ReleaseBufferElement();
  27         m_Index.ReleaseBufferElement();
  28
  29         NumTriangles = 0;
  30 }
  31
  32 void GeometryVBO::DrawVBOAll(GLenum primiType, ShaderInterface* shader)
  33 {
  34         if (!m_Vertex.HasBuffer())
  35                 return;
  36
  37         glEnableClientState(GL_VERTEX_ARRAY);
  38         m_Vertex.Bind();
  39         glVertexPointer(3, GL_FLOAT, 0, VBO_BUFFER_OFFSET(0));
  40
  41         if (m_Normal.HasBuffer())
  42                 m_Normal.BindPtrAsNoral();
  43
  44         if (m_Texture.HasBuffer())
  45                 m_Texture.BindPtrAsTexcoord();
  46
  47         if (m_VCol.HasBuffer())
  48                 m_VCol.BindPtrAsColor();
  49
  50         GLint tbuf_id = -1;
  51         if (m_Tangents.HasBuffer())
  52         {
  53                 tbuf_id = shader->GetTangentAttribIndex();
  54                 if (tbuf_id != -1)
  55                         m_Tangents.BindPtrAsAttrib3f(tbuf_id);
  56         }
  57
  58         m_Index.Bind();
  59         glDrawElements(primiType, NumTriangles * 3 * 4, GL_UNSIGNED_INT, VBO_BUFFER_OFFSET(0));
  60
  61         glDisableClientState(GL_VERTEX_ARRAY);
  62         glDisableClientState(GL_NORMAL_ARRAY);
  63         glDisableClientState(GL_COLOR_ARRAY);
  64         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
  65
  66         if (tbuf_id != -1)
  67                 glDisableVertexAttribArray(tbuf_id);
  68 }