# For sequences
var vertexBufferData: seq[float32] = 
              @[float32(-1.0), -1.0, 0.0,
                         1.0, -1.0, 0.0,
                         0.0,  1.0, 0.0]      

glBufferData(GL_ARRAY_BUFFER, GLsizei(vertexBufferData.len * sizeof(vertexBufferData[0])), addr vertexBufferData, GL_STATIC_DRAW)

# For arrays
var vertexBufferData: array[0..8, float32] = 
              [float32(-1.0), -1.0, 0.0,
                         1.0, -1.0, 0.0,
                         0.0,  1.0, 0.0] 

glBufferData(GL_ARRAY_BUFFER, GLsizei(sizeof(vertexBufferData)), addr vertexBufferData, GL_STATIC_DRAW)