2D Hud over 3D scene (OpenGL, SDL, C++) - c++

Question

My 3D world draws perfectly every time but the 2D text never draws. The code below features my latest effort using a tutorial from lighthouse3D. I get the feeling its something stupidly simple and im just not seeing it.
Rendering code :
void ScreenGame::draw(SDL_Window * window)
{
glClearColor(0.5f,0.5f,0.5f,1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set up projection matrix
glm::mat4 projection(1.0);
projection = glm::perspective(60.0f,800.0f/600.0f,1.0f,150.0f);
rt3d::setUniformMatrix4fv(shaderProgram, "projection", glm::value_ptr(projection));
GLfloat scale(1.0f); // just to allow easy scaling of complete scene
glm::mat4 modelview(1.0); // set base position for scene
mvStack.push(modelview);
mvStack.top() = glm::lookAt(camera->getEye(),camera->getAt(),camera->getUp());
glm::vec4 tmp = mvStack.top()*lightPos;
light0.position[0] = tmp.x;
light0.position[1] = tmp.y;
light0.position[2] = tmp.z;
rt3d::setLightPos(shaderProgram, glm::value_ptr(tmp));
glUseProgram(skyBoxShader); // Switch shaders, reset uniforms for skybox
rt3d::setUniformMatrix4fv(skyBoxShader, "projection", glm::value_ptr(projection));
glDepthMask(GL_FALSE); // make sure depth test is off
glm::mat3 mvRotOnlyMat3 = glm::mat3(mvStack.top());
mvStack.push( glm::mat4(mvRotOnlyMat3) );
skyBox->draw(mvStack); // drawing skybox
mvStack.pop();
glDepthMask(GL_TRUE); // make sure depth test is on
mvStack.top() = glm::lookAt(camera->getEye(),camera->getAt(),camera->getUp());
glUseProgram(shaderProgram); // Switch back to normal shader program
rt3d::setUniformMatrix4fv(shaderProgram, "projection", glm::value_ptr(projection));
rt3d::setLightPos(shaderProgram, glm::value_ptr(tmp));
rt3d::setLight(shaderProgram, light0);
// Draw all visible objects...
Ball->draw(mvStack);
ground->draw(mvStack);
building1->draw(mvStack);
building2->draw(mvStack);
setOrthographicProjection();
glPushMatrix();
glLoadIdentity();
renderBitmapString(5,30,1,GLUT_BITMAP_HELVETICA_18,"Text Test");
glPopMatrix();
restorePerspectiveProjection();
SDL_GL_SwapWindow(window); // swap buffers
}
using the following methods :
void setOrthographicProjection() {
// switch to projection mode
glMatrixMode(GL_PROJECTION);
// save previous matrix which contains the
//settings for the perspective projection
glPushMatrix();
// reset matrix
glLoadIdentity();
// set a 2D orthographic projection
glOrtho(0.0F, 800, 600, 0.0F, -1.0F, 1.0F);
// switch back to modelview mode
glMatrixMode(GL_MODELVIEW);
}
void restorePerspectiveProjection() {
glMatrixMode(GL_PROJECTION);
// restore previous projection matrix
glPopMatrix();
// get back to modelview mode
glMatrixMode(GL_MODELVIEW);
}
void renderBitmapString(
float x,
float y,
int spacing,
void *font,
char *string) {
char *c;
int x1=x;
for (c=string; *c != '\0'; c++) {
glRasterPos2f(x1,y);
glutBitmapCharacter(font, *c);
x1 = x1 + glutBitmapWidth(font,*c) + spacing;
}
}