This is some code I knocked up to display the values returned by the EntityPitch, EntityYaw, and EntityRoll functions. It illistrates a few points, which I wanted to get clear in my head:
1 - EntityPitch returns the same values in different quadrants.
2 - It's important to be clear on where the starting rotation (0.0 degrees) is, and which direction the rotation will turn the entity in relation to the axis you are viewing along, as well as where the 'flipover' points (plus to minus, etc) are in the rotation.
3 - I have way too much time on my hands.
1 - EntityPitch returns the same values in different quadrants.
2 - It's important to be clear on where the starting rotation (0.0 degrees) is, and which direction the rotation will turn the entity in relation to the axis you are viewing along, as well as where the 'flipover' points (plus to minus, etc) are in the rotation.
3 - I have way too much time on my hands.
Open in online IDEConst C_CAM_TURN_RATE# = 1.0 Global timer = CreateTimer( 25 ) Graphics3D 800, 600, 0, 2 SetBuffer BackBuffer() Global cam = CreateCamera() CameraZoom cam, 1.6 PositionEntity cam, 15.0, 0.0, 0.0 Global light = CreateLight() Global cone_x = CreateCone() ; Cone points to X+. RotateMesh cone_x, 0.0, 0.0, -90.0 UpdateNormals cone_x HideEntity cone_x Global cone_y = CreateCone() ; Cone points to Y+. UpdateNormals cone_y HideEntity cone_y Global cone_z = CreateCone() ; Cone points to Z+. RotateMesh cone_z, 90.0, 0.0, 0.0 UpdateNormals cone_z HideEntity cone_z Global cone = cone_z ShowEntity cone PointEntity cam, cone Global axis = 1 While Not KeyHit( 1 ) If KeyHit( 57 ) axis = axis + 1 If axis = 4 Then axis = 1 RotateEntity cone, 0.0, 0.0, 0.0 HideEntity cone If axis = 1 Then PositionEntity cam, 15.0, 0.0, 0.0 : cone = cone_z If axis = 2 Then PositionEntity cam, 0.0, 15.0, 0.0 : cone = cone_x If axis = 3 Then PositionEntity cam, 0.0, 0.0, 15.0 : cone = cone_y ShowEntity cone PointEntity cam, cone EndIf If axis = 1 Then TurnEntity cone, C_CAM_TURN_RATE#, 0.0, 0.0 If axis = 2 Then TurnEntity cone, 0.0, C_CAM_TURN_RATE#, 0.0 If axis = 3 Then TurnEntity cone, 0.0, 0.0, C_CAM_TURN_RATE# UpdateWorld RenderWorld Color 255, 255, 255 Text 10, 10, "Press SPACE to switch to a new axis of rotation" If axis = 1 Text 10, 40, "Pitch (X axis): " + EntityPitch( cone ) Text 10, 60, "Viewing from X+" Text 10, 80, "Cone points to Z+" EndIf If axis = 2 Text 10, 40, "Yaw (Y axis): " + EntityYaw( cone ) Text 10, 60, "Viewing from Y+" Text 10, 80, "Cone points to X+" EndIf If axis = 3 Text 10, 40, "Roll (Z axis): " + EntityRoll( cone ) Text 10, 60, "Viewing from Z+" Text 10, 80, "Cone points to Y+" EndIf If axis <> 1 Color 200, 0, 0 ; -- Draw X+ axis marker. CameraProject cam, 5.0, 0.0, 0.0 Text ProjectedX# (), ProjectedY# (), "X+", True, True ;^^^^^^ ; -- Draw X- axis marker. CameraProject cam, -5.0, 0.0, 0.0 Text ProjectedX# (), ProjectedY# (), "X-", True, True ;^^^^^^ EndIf If axis <> 2 Color 240, 240, 0 ; -- Draw Y+ axis marker. CameraProject cam, 0.0, 5.0, 0.0 Text ProjectedX# (), ProjectedY# (), "Y+", True, True ;^^^^^^ ; -- Draw Y- axis marker. CameraProject cam, 0.0, -5.0, 0.0 Text ProjectedX# (), ProjectedY# (), "Y-", True, True ;^^^^^^ EndIf If axis <> 3 Color 0, 240, 0 ; -- Draw Z+ axis marker. CameraProject cam, 0.0, 0.0, 5.0 Text ProjectedX# (), ProjectedY# (), "Z+", True, True ;^^^^^^ ; -- Draw Z- axis marker. CameraProject cam, 0.0, 0.0, -5.0 Text ProjectedX# (), ProjectedY# (), "Z-", True, True ;^^^^^^ EndIf Flip WaitTimer( timer ) Wend End