//what to do when the image has to be draw
void Game::render(void)
{
//set the clear color (the background color)
glClearColor(0.0, 0.0, 0.0, 1.0);
// Clear the window and the depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//Put the camera matrices on the stack of OpenGL (only for fixed rendering)
camera->set();
//Draw out world
drawGrid(500); //background grid
//draw the plane
Matrix44 m;
m.setRotation(angle * DEG2RAD, Vector3(0,1,0) ); //build a rotation matrix
glPushMatrix();
m.set();
plane->render(); //render plane
glPopMatrix();
//swap between front buffer and back buffer
SDL_GL_SwapWindow(this->window);
}
void Camera::rotate(float angle, const Vector3& axis)
{
Matrix44 R;
R.setRotation(angle,axis);
Vector3 new_front = R * (center - eye);
center = eye + new_front;
updateViewMatrix();
}
void Camera::orbit( const Vector3& center, float angle, const Vector3& axis )
{
Matrix44 R;
R.setRotation(angle,axis);
Matrix44 T;
T.setTranslation( center.x, center.y, center.z );
Matrix44 M = T * R;
T.setTranslation( -center.x, -center.y, -center.z );
M = M * T;
this->center = M * this->center;
this->eye = M * this->eye;
updateViewMatrix();
}
void Matrix44::rotateLocal( Float angle_in_rad, const Vector3& axis )
{
Matrix44 R;
R.setRotation(angle_in_rad, axis);
*this = R * *this;
}
void Matrix44::rotate( Float angle_in_rad, const Vector3& axis )
{
Matrix44 R;
R.setRotation(angle_in_rad, axis);
*this = *this * R;
}