C++ openGL static window with VBOs and shaders - c++

Question

So I've been building a pretty simple piece of code that renders .OBJ files and lets the user look around using VBOs and the most simple GLSL shaders immaginable, but when run the window is just a static image (looks like the object seen from 0,0,0). Without the shader program it still renders normally, just without color. Any idea what I colud be doing wrong?
VBO & shader stuff:
//Create buffer for vertex data (x,y,z)
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(vector3f), &vertices[0], GL_STATIC_DRAW);
//Create buffer for color data (r,g,b)
glGenBuffers(1, &colorBuffer);
glBindBuffer(GL_ARRAY_BUFFER, colorBuffer);
glBufferData(GL_ARRAY_BUFFER, temp.size() * sizeof(vector3f), &temp[0], GL_STATIC_DRAW);
//Create and compile shaders
GLuint vertShader = 0, fragShader = 0, program = 0;
createShader("vertex.glsl", GL_VERTEX_SHADER, vertShader);
createShader("fragment.glsl", GL_FRAGMENT_SHADER, fragShader);
program = glCreateProgram();
glAttachShader(program, vertShader);
glAttachShader(program, fragShader);
glBindAttribLocation(program, vertexAttribIndex, "vertex_position");
glBindAttribLocation(program, colorAttribIndex, "vertex_colour");
glLinkProgram(program);
printShaderInfoLog(vertShader);
printProgramInfoLog(program);
//Set attribute pointers for GLSL
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glVertexAttribPointer(vertexAttribIndex, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(vertexAttribIndex);
glBindBuffer(GL_ARRAY_BUFFER, colorBuffer);
glVertexAttribPointer(colorAttribIndex, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(colorAttribIndex);
Render loop:
while (!glfwWindowShouldClose(window)) {
glClearColor(0.0F, 0.0F, 0.0F, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glUseProgram(program);
glViewport(0, 0, width, height);
gluPerspective(70.0, width / height, 1.0, 30.0);
glMatrixMode(GL_MODELVIEW);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glDrawArrays(GL_TRIANGLES, 0, vertBufferSize);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glfwSwapBuffers(window);
glfwPollEvents();
}
Vertex shader:
#version 420
layout(location = 0) in vec3 vertex_position;
layout(location = 1) in vec3 vertex_colour;
out vec3 colour;
out vec4 gl_Position;
void main () {
colour = vertex_colour;
gl_Position = vec4 (vertex_position, 1.0);
}
Fragment shader:
#version 420
in vec3 colour;
out vec4 colorOut;
void main () {
colorOut = vec4(colour, 1.0);
}
Sorry if I've missed out anything obvious, I've been fighting this for hours.