void Camera::roll_right(double elapsed_seconds) {
cam_roll += cam_heading_speed * elapsed_seconds;
cam_moved = true;
float q_roll[16];
create_versor (q_roll, cam_roll, fwd.v[0], fwd.v[1], fwd.v[2]);
mult_quat_quat (quaternion, q_roll, quaternion);
// recalc axes to suit new orientation
recalc_axes();
}
void Camera::yaw_right(double elapsed_seconds) {
cam_yaw -= cam_heading_speed * elapsed_seconds;
cam_moved = true;
float q_yaw[16];
create_versor (q_yaw, cam_yaw, up.v[0], up.v[1], up.v[2]);
mult_quat_quat (quaternion, q_yaw, quaternion);
// recalc axes to suit new orientation
recalc_axes();
}
void Camera::pitch_up(double elapsed_seconds) {
cam_pitch += cam_heading_speed * elapsed_seconds;
cam_moved = true;
float q_pitch[16];
create_versor (
q_pitch, cam_pitch, rgt.v[0], rgt.v[1], rgt.v[2]
);
mult_quat_quat (quaternion, q_pitch, quaternion);
// recalc axes to suit new orientation
recalc_axes();
}
void GLCamera::movePitchDown(double elapsed_seconds)
{
cam_pitch -= cam_heading_speed * elapsed_seconds;
float q_pitch[16];
create_versor(q_pitch, cam_pitch, rgt.v[0], rgt.v[1], rgt.v[2]);
mult_quat_quat(quaternion, q_pitch, quaternion);
// recalc axes to suit new orientation
quat_to_mat4(R.m, quaternion);
fwd = R * vector4(0.0, 0.0, -1.0, 0.0);
rgt = R * vector4(1.0, 0.0, 0.0, 0.0);
up = R * vector4(0.0, 1.0, 0.0, 0.0);
}
void Camera::yaw_left(double elapsed_seconds) {
cam_yaw += cam_heading_speed * elapsed_seconds;
cam_moved = true;
// create a quaternion representing change in heading (the yaw)
float q_yaw[16];
create_versor (q_yaw, cam_yaw, up.v[0], up.v[1], up.v[2]);
// add yaw rotation to the camera's current orientation
mult_quat_quat (quaternion, q_yaw, quaternion);
// recalc axes to suit new orientation
recalc_axes();
}
void GLCamera::rollRight(double elapsed_seconds)
{
cam_roll += cam_heading_speed * elapsed_seconds;
float q_roll[16];
create_versor(q_roll, cam_roll, fwd.v[0], fwd.v[1], fwd.v[2]);
mult_quat_quat(quaternion, q_roll, quaternion);
// recalc axes to suit new orientation
quat_to_mat4(R.m, quaternion);
fwd = R * vector4(0.0, 0.0, -1.0, 0.0);
rgt = R * vector4(1.0, 0.0, 0.0, 0.0);
up = R * vector4(0.0, 1.0, 0.0, 0.0);
}
void GLCamera::moveYawLeft(double elapsed_seconds)
{
cam_yaw += getHeadingSpeed() * elapsed_seconds;
// create a quaternion representing change in heading (the yaw)
float q_yaw[16];
create_versor(q_yaw, cam_yaw, up.v[0], up.v[1], up.v[2]);
// add yaw rotation to the camera's current orientation
mult_quat_quat(quaternion, q_yaw, quaternion);
// recalc axes to suit new orientation
quat_to_mat4(R.m, quaternion);
fwd = R * vector4(0.0, 0.0, -1.0, 0.0);
rgt = R * vector4(1.0, 0.0, 0.0, 0.0);
up = R * vector4(0.0, 1.0, 0.0, 0.0);
}