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Hi all. While coding I came up with an issue involving incorrect node rotation which, for the life of me, I'm not able to figure out. If would be helpful if someone could point out where the issue is. Basically I'm trying to create and align a shell along the barrel of an artillery. The final line of world transformation is incorrectly rotating the shell. Kindly find pics attached. Code for spawning and aligning shell is like this : void spawnShell() { // Create shell node. m_cRefNode = class_remove( new NodeReference( "nodes/weapons/ammunition/155mm_shell.node" ) ); engine.editor.addNode( m_cRefNode ); assert( m_cRefNode != NULL ); m_cRefNode.setName( "he_shell" ); m_cRefNode.setProperty( "HEShell" ); // Find and assign necessary nodes. Node container = m_cRefNode.getNode(); m_cObject = node_cast( container ); int id = container.findChild( "nose" ); m_cNoseNode = node_cast( container.getChild( id ) ); id = container.findChild( "base" ); m_cBaseNode = node_cast( container.getChild( id ) ); assert( m_cObject != NULL ); assert( m_cBaseNode != NULL ); assert( m_cNoseNode != NULL ); // Place and align the shell w.r.t artillery barrel NodeDummy barrelEnd = m_cOwnerArtillery.getBarrelEnd(); m_cRefNode.setWorldPosition( barrelEnd.getWorldPosition() ); // Rot_Issue_2/2A.jpg m_cRefNode.setWorldRotation( m_cOwnerArtillery.getWorldRotation() ); // Rot_Issue_3/4.jpg vec3 v1 = m_cNoseNode.getWorldPosition() - m_cBaseNode.getWorldPosition(); vec3 v2 = m_cOwnerArtillery.getLaunchDirection(); if( v1 != v2 && length( v1 ) != 0.0f && length( v2 ) != 0.0f ) { v1 = normalize( v1 ); v2 = normalize( v2 ); vec3 v3 = cross( v1, v2 ); v3 = normalize( v3 ); float angle = acos( dot( v1, v2 ) ) * RAD2DEG; m_cRefNode.setWorldTransform( m_cRefNode.getWorldTransform() * rotate( v3, angle ) ); // Rot_Issue_5/5A.jpg } } rotation_issue.rar