   Fast memcpy for openGL VBO
  Hi everyone,I'm trying to transfer data to vbo. However, with the current setup, it is slower than reinitializing the vbo with new data.m_vertexBuffer is a std::vector<float> container, and I'm working on win32 platform.glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer);GLfloat* vertexPtr = (GLfloat*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);if(vertexPtr){memcpy(vertexPtr, &m_renderingData[0], sizeof(float)*m_renderingData.size());glUnmapBuffer(GL_ARRAY_BUFFER);}glBindBuffer(GL_ARRAY_BUFFER, 0);Perhaps anyone had faced this problem and has a solution? Google had failed me this time.   
  perhaps with glBufferSubData or glBufferData?   ;Quote:Original post by Juanxoperhaps with glBufferSubData or glBufferData?I'm going to have to agree with this approach. I've never been able to get the (un)map functions to work quite right (probably my fault more than anything), but the buffer functions work well. Textures get updated the exact same way, so I'm not entirely sure why they have the (un)map functions. Seems like overkill to me.   