GLM look at object outside of the screen - opengl

Question

I have a cube with vertex at 1 and -1 (1 1 1, 1 1 -1, etc).
Currently I'm using only the view matrix and set the projection to be identity:
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
mat4 view = glm::lookAt(vec3(0,0,3),
vec3(0,0,0),
vec3(0,0,1));
mat4 mvp = view;
GLuint location = glGetUniformLocation(p_myGLSL->getProgramID(), "mvp");
glUniformMatrix4fv(location, 1, GL_FALSE, &mvp[0][0]);
glBindVertexArray(vaoHandle);
glDrawArrays(GL_TRIANGLES, 0, countV);
glFlush();
glutSwapBuffers();
Vertex shading code:
layout (location = 0) in vec3 VertexPosition;
uniform mat4 mvp;
void main()
{
gl_Position = mvp * vec4(VertexPosition,1.0);
}
VBO, VAO code:
// fill values into VBO
GLuint positionBufferHandle;
glGenBuffers(1, &positionBufferHandle);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferHandle);
glBufferData(GL_ARRAY_BUFFER, countV*sizeof(float), positionData, GL_STATIC_DRAW);
// Vertex array object
glGenVertexArrays(1, &vaoHandle);
glBindVertexArray(vaoHandle);
// Read into vertex shader
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, positionBufferHandle);
glVertexAttribPointer(0,3,GL_FLOAT, GL_FALSE, 0, (GLubyte *) NULL);
glutMainLoop();
Why is it showing a blank screen for now?
P/S: If I create the view matrix manually it works:
mat4 translate = glm::translate(glm::mat4(1), vec3(-centerx, -centery, -centerz));
mat4 scale = glm::scale(glm::mat4(1), vec3(0.2, 0.2, 0.2));
mat4 mvp = scale * translate;

Answer 1

Use vec3(0,1,0) as up vector. When you are looking at (0,0,0) from (0,0,3), you looking in (0,0,-1) direction. The up vector should be perpendicular to this vector, which you can use vec3(0, 1, 0) vector. So, change the view matrix assignment part to:
mat4 view = glm::lookAt(vec3(0,0,3),
vec3(0,0,0),
vec3(0,1,0));
Also, Add #version 430 or whatever GLSL version which you are using to beginning of your vertex shader. layout qualifer is part of OpenGL core, since OpenGL 4.1 not earlier.