Adjusting camera view after translation and rotation - opengl

Question

I'm trying to make a scene of a "walking camera" in a room.
For now, i cant see anything, let alone rotation and translation, and i cant figure out why.
Please note, that before i used the look at function, i could see all like i should,
But the translation and rotation were wrong since i always moved according to a defined axis,
And not the camera axis like i should.
This is my code for now:
The perspective and look at -
mat4 Projection = perspective(45.0f, 1.0f, 0.1f, 100.0f);
vec3 pos = vec3(0.0f, 0.0f, 0.0f);
vec3 target = vec3(0.0f, 0.0f, -99.0f);
vec3 up = vec3(0.0f, 1.0f, 0.0f);
wvp *= Projection;
wvp = lookAt(pos, target, up);
The Translation and rotation after pressing some keys:
glfwSwapBuffers();
if(glfwGetKey( 'W' ))
{
wvp = translate(wvp, vec3(0,0,0.01));
}
if(glfwGetKey( 'S' ))
{
wvp = translate(wvp, vec3(0,0,-0.01));
}
if(glfwGetKey( 'A' ))
{
wvp = rotate(wvp,-1.0f, vec3(0.0f, 1.0f, 0.0f));
}
if(glfwGetKey( 'D' ))
{
wvp = rotate(wvp,1.0f, vec3(0.0f, 1.0f, 0.0f));
}
The Defined vertex for now:
static const GLfloat vertices[] = {
//Given square
0.0f, 0.0f, 2.0f,
1.0f, 0.0f, 2.0f,
0.0f, 1.0f, 2.0f,
1.0f, 1.0f, 2.0f,
}
The why i connect them:
static const GLubyte indices[] = {
0,1,3,
0,2,3,
}
Some buffering:
GLuint vertexbuffer;
glGenBuffers(1, &vertexbuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
GLuint indexbuffer;
glGenBuffers(1, &indexbuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexbuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
Any idea on how to define the camera as needed and use translation and rotation to go with the camera?

Answer 1

you should update pos and target vectors (optionally update up), then build lookAt Matrix
vec3 pos, target, forward
update() {
if (key_up)
pos += forward
...
}
render() {
camMatrix = lookat(pos, target, up)
mvp = modelMatrix * camMatrix * projMatrix;
render_geometry
}
forward is vector that means direction of movement.