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April 22, 2024 11:05
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| def aim(vector, aimvec, upvec, worldUpVec): | |
| vector = om.MVector(vector) | |
| aimvec = om.MVector(aimvec) | |
| upvec = om.MVector(upvec) | |
| worldUpVec = om.MVector(worldUpVec) | |
| tanvec = worldUpVec - vector | |
| direction = tanvec ^ vector | |
| aimQuat = om.MQuaternion(aimvec, vector) | |
| fromvec = upvec.transformAsNormal(aimQuat.asMatrix()) | |
| vnormal = vector.normal() | |
| projvec = tanvec - (vnormal * (vnormal * tanvec)) | |
| dot = fromvec * projvec | |
| theta = math.acos(dot / (fromvec.length() * projvec.length())) | |
| if fromvec * direction > 0: | |
| angle = theta | |
| else: | |
| angle = ((2 * math.pi) - theta) | |
| upQuat = om.MQuaternion(angle, aimvec) | |
| aimMatrix = aimQuat.asMatrix() | |
| upMatrix = upQuat.asMatrix() | |
| tmx = om.MTransformationMatrix(upMatrix * aimMatrix) | |
| r = tmx.rotation() | |
| deg = math.degrees | |
| return [deg(r.x), deg(r.y), deg(r.z)] | |
| def ptToOrient(nodeA, nodeB, reverse=False): | |
| pos1 = cmds.xform(nodeA, q=1, ws=1, t=1) | |
| pos2 = cmds.xform(nodeB, q=1, ws=1, t=1) | |
| mx_p = om.MMatrix() | |
| for i in range(3): | |
| mx_p.setElement(3, i, pos1[i]) | |
| mx_c = om.MMatrix() | |
| for i in range(3): | |
| mx_c.setElement(3, i, pos2[i]) | |
| cmx = mx_c * mx_p.inverse() | |
| v = om.MVector(cmx[12], cmx[13], cmx[14]) | |
| if reverse: | |
| v *= -1 | |
| return aim(vector=v, aimvec = [1,0,0], upvec = [0,1,0], worldUpVec = [0,1,0]) |
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| import maya.api.OpenMaya as om | |
| def getVertexMatrix(mesh, vtx, pos): | |
| sel = om.MSelectionList() | |
| sel.add(mesh) | |
| dagPath = sel.getDagPath(0) | |
| mfnMesh = om.MFnMesh(dagPath) | |
| space = om.MSpace.kObject | |
| pt = om.MPoint(pos[0], pos[1], pos[2]) | |
| positon, normal, fid = mfnMesh.getClosestPointAndNormal(pt, space) | |
| normal = mfnMesh.getVertexNormal(vtx, space) | |
| tangent = mfnMesh.getFaceVertexTangent(fid, vtx, space) | |
| binormal = mfnMesh.getFaceVertexBinormal(fid, vtx, space) | |
| normal.normalize() | |
| tangent.normalize() | |
| binormal.normalize() | |
| mm = [binormal.x, binormal.y, binormal.z, 0, | |
| normal.x, normal.y, normal.z, 0, | |
| tangent.x, tangent.y, tangent.z, 0, | |
| pt.x, pt.y, pt.z, 1] | |
| return om.MMatrix(mm) |
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