+ // joystick
+ float jdeadsq = joy_deadzone * joy_deadzone;
+ float jmove_lensq = length_sq(joy_move);
+ float jlook_lensq = length_sq(joy_look);
+
+ if(jmove_lensq > jdeadsq) {
+ float len = sqrt(jmove_lensq);
+ jmove_lensq -= jdeadsq;
+
+ float mag = len * len;
+ dir.x += mag * joy_move.x / len * 2.0 * speed;
+ dir.z += mag * joy_move.y / len * 2.0 * speed;
+ }
+ if(jlook_lensq > jdeadsq) {
+ float len = sqrt(jlook_lensq);
+ jlook_lensq -= jdeadsq;
+
+ float mag = len * len;
+ cam_theta += mag * joy_look.x / len * 200.0 * dt;
+ cam_phi += mag * joy_look.y / len * 100.0 * dt;
+ if(cam_phi < -90.0f) cam_phi = -90.0f;
+ if(cam_phi > 90.0f) cam_phi = 90.0f;
+ }
+
+ // keyboard move