About the Meaning of parameters

[muzhizhao]

I've just had problems reading the code and am having trouble understanding the following parameters： 1.Aircraft.v_move and get_planestate(plane_id)["move_vector"] 2.Plane_Euler= [plane_state["Euler_angles"][0] / NormStates["Plane_Euler_angles"], plane_state["Euler_angles"][1] / NormStates["Plane_Euler_angles"], plane_state["Euler_angles"][2] / NormStates["Plane_Euler_angles"]] 3.Plane_Pitch_Att = plane_state["pitch_attitude"] / NormStates["Plane_pitch_attitude"] Plane_Roll_Att = plane_state["roll_attitude"] / NormStates["Plane_roll_attitude"] Plane_Hor_Speed = plane_state["horizontal_speed"] / NormStates["Plane_horizontal_speed"]

[muzhizhao]

Is the horizontal velocity on the x-axis？ Is the vertical velocity on the y-axis？

[ErkMkd]

Hi !

1. v_move is the instant velocity vector. It's linear and in meter per second.
2. Euler angles are the angles of the 3 references axes X, Y, Z of the aircraft in the world. They are used to compute the matrices. https://en.wikipedia.org/wiki/Euler_angles
3. Pitch attitude is the angle of inclination of the aircraft relative to the ground plane. (e.g. pitch = 15°: The aircraft's nose is pointed at 15° to the sky) Roll attitude is the angle of the plane relative to the horizon axis. In other words, it is the angle that determines whether the aircraft leans to the right or to the left. Plane Horizontal Speed is the speed of the aircraft on its projected ground track.

[ErkMkd]

"Is the horizontal velocity on the x-axis？ Is the vertical velocity on the y-axis？" This is an very good question ! Physicians reference is not the same as 3d graphicians reference. Look: X axis is Red one, Y is Green one, and Z is Blue:

[ErkMkd]

So, Pitch attitude is the angle between Z axis and ground plane,
https://github.com/harfang3d/dogfight-sandbox-hg2/blob/main/source/Machines.py#L663 Roll attitude is the angle between X axis and ground plane. https://github.com/harfang3d/dogfight-sandbox-hg2/blob/main/source/Machines.py#L670