#Dv^ 38 Posted February 3 Share Posted February 3 Hi everyone!, I have a query regarding this script. I am wanting to rotate an object obtaining its rotation through the function getElementBoneAttachmentDetails and it returns a matrix, of which I do not know how to use it. Would you give me a guide to try to understand? https://forum.mtasa.com/topic/128821-rel-new-bone-attach-using-onclientpedsprocessed-and-useful-function-attachelementtobone/?tab=comments#comment-992075 I don't know how to get the integers rx, ry, rz of the rotation of the object through a matrix Thanks for the help Link to post

Tekken 146 Posted February 4 Share Posted February 4 Although have no experience with matrix and I'm a noob in mathematics I have found something interesting in python and convert it to Lua, not sure it will work try converting the matrix with this function: function convertRotationMatrixToEulerAngles(matrix) local roll, pitch, yaw = false, false, false; local pi = math.pi; local atan2 = math.atan2; local m_cos = math.cos; local m_sin = math.sin; if matrix then local m11, m12, m13 = matrix[1][1], matrix[1][2], matrix[1][3]; local m21, m22, m23 = matrix[2][1], matrix[2][2], matrix[2][3]; local m31, m32, m33 = matrix[3][1], matrix[3][2], matrix[3][3]; if m31 ~= 1 and m31 ~= -1 then pitch_1 = -1*m_sin(m31); pitch_2 = pi - pitch_1; roll_1 = m_atan2(m32/m_cos(pitch_1), m33/m_cos(pitch_1)); roll_2 = m_atan2(m33/m_cos(pitch_2), m33/m_cos(pitch_2)); yaw_1 = m_atan2(m21/m_cos(pitch_1), m11/m_cos(pitch_1)); yaw_2 = m_atan2(m21/m_cos(pitch_2), m11/m_cos(pitch_2)); pitch = pitch_1; roll = roll_1; yaw = yaw_1; else if m31 == -1 then pitch = pi/2; roll = yaw + m_atan2(m12, m13); else pitch = -pi/2; roll = -1*yaw + m_atan2(-1*m12,-1*m13); end yaw = 0; end roll = roll*180/pi; pitch = pitch*180/pi; yaw = yaw*180/pi; return roll, pitch, yaw; end end It will return (in theory) rotX, rotY, rotZ in degrees Hope that helps! 1 Link to post

Moderators Patrick 343 Posted February 4 Moderators Share Posted February 4 It isn't a matrix, 6-7-8th arguments are rx, ry, rz . Link to post

Tekken 146 Posted February 4 Share Posted February 4 2 hours ago, Patrick said: It isn't a matrix, 6-7-8th arguments are rx, ry, rz . He’s talking about attachToBones I have a pm from him also if you visit the link it’s attachToBones Link to post

#Dv^ 38 Posted February 4 Author Share Posted February 4 @Tekken Thank you very much for your help! I have used its helpful, but when obtaining the data it gives me wrong numbers. If I rotate X = 90, I should rotate the same with the matrix but it returns other numbers Link to post

Tekken 146 Posted February 4 Share Posted February 4 As I said I have not tested it, may I know what rotx roty and rotz you enter and what you gen when converting the matrix using this function? Link to post

#Dv^ 38 Posted February 4 Author Share Posted February 4 I use this code to do what I want exports.bone_attach:setElementBoneRotationOffset(object, 180, 40, 0) local data = exports.bone_attach:getElementBoneAttachmentDetails(object) local rx, ry, rz = convertRotationMatrixToEulerAngles(data[6]) print(rx, ry, rz) -- return -140, -5.3751111671239e-15, 180 Link to post

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