Celestia/Celx Scripting/CELX Lua Methods/CEL command setorientation

setorientation setorientation { angle <anglenumber> axis <axisvector> } -- OR -- setorientation { ow <ownumber> ox <oxnumber> oy <oynumber> oz <oznumber> } Sets the camera orientation. If you are attempting to duplicate a position based on a Bookmark or Cel://URL, you will also need to set the proper Coordinate System, position, and other parameters. angle <anglenumber> Angle in degrees. No default.This value may be obtained from a Celestia Bookmark, which is stored in the favorites.cel located in the Celestia directory. axis <axisvector> Rotation vector [ <xrot> <yrot> <zrot> ], no default.This value may be obtained from a Celestia Bookmark, which is stored in the favorites.cel file located in the Celestia directory.<xrot>, <yrot> and <zrot> are the Eular Angle or Angle-Axis representation of the camera's orientation. Think of them as Pitch, Yaw, and Roll in aviation. -- OR -- ow <ownumber> represents the angle as stored by a Cel://URL. It is obtained from the following Cel://URL value: &ow. No default. ox <oxnumber> represents the x-axis as stored by a Cel://URL. It is obtained from the following Cel://URL value: &ox=. No default. oy <oynumber> represents the y-axis as stored by a Cel://URL. It is obtained from the following Cel://URL value: &oy=. No default. oz <oznumber> represents the z-axis as stored by a Cel://URL. It is obtained from the following Cel://URL values: &oz=. No default. CELX equivalent-1: Based on Parameter list-1 and the celestia:newvector(), celestia:newrotation(axis-angle) and observer:setorientation() methods. Create new vector, containing the axis of this rotation [ <xrot> , <yrot> , <zrot> ], and store in "vec". vec = celestia:newvector( <xrot>, <yrot>, <zrot> ) Convert the <anglenumber> from degrees in radians and store in "angle":"angle" = math.pi / 180 * <anglenumber> (= 3.14159265 / 180 * <anglenumber> ).The Lua math.rad( <anglenumber> ) function can also be used for this. angle = math.rad( <anglenumber> ) Create new rotation (i.e. a quaternion) of an "angle" about the specified axis of this rotation in "vec", and store in "rot". rot = celestia:newrotation(vec, angle) Get observer instance of the active view and rotate the observer according the created new rotation in "rot". obs = celestia:getobserver() obs:setorientation(rot) Summarized: vec = celestia:newvector( <xrot>, <yrot>, <zrot> ) angle = math.rad( <anglenumber> ) rot = celestia:newrotation(vec, angle) obs = celestia:getobserver() obs:setorientation(rot) CELX equivalent-2: Based on Parameter list-2 and the celestia:newrotation() and observer:setorientation() methods. Create new rotation (i.e. a quaternion) from four scalar values and store in rot.<ownumber>: The OW-component of the new rotation, as a number-values taken from a cel-style URL &ow=.<oxnumber>: The OX-component of the new rotation, as a number-values taken from a cel-style URL &ox=.<oynumber>: The OY-component of the new rotation, as a number-values taken from a cel-style URL &oy=.<oznumber>: The OZ-component of the new rotation, as a number-values taken from a cel-style URL &oz=. rot = celestia:newrotation( <ownumber>, <oxnumber>, <oynumber>, <oznumber> ) Get observer instance of the active view and rotate the observer according the created new rotation in "rot". obs = celestia:getobserver() obs:setorientation(rot) Summarized: rot = celestia:newrotation( <ownumber>, <oxnumber>, <oynumber>, <oznumber> ) obs = celestia:getobserver() obs:setorientation(rot) Example:Set the camera orientation according parameterlist-1: CEL: setorientation { angle 0.945208 axis [ 0.81466 -0.570975 -0.101573 ] } CELX based on parameter list-1: vec = celestia:newvector(0.81466, -0.570975, -0.101573) angle = math.rad(0.945208) rot = celestia:newrotation(vec, angle) obs = celestia:getobserver() obs:setorientation(rot) Example:Set the camera orientation according parameterlist-2: CEL setorientation { ow 0.090610 ox -0.494683 oy 0.860207 oz -0.084397 } CELX based on parameter list-2: rot = celestia:newrotation(0.090610, -0.494683, 0.860207, -0.084397) obs = celestia:getobserver() obs:setorientation(rot) Back to CEL command index