Merge pull request 'improved mouse look node and added missing rigid body settings in Properties > physics > leenkx Props' (#98) from wuaieyo/LNXSDK:main into main

Reviewed-on: LeenkxTeam/LNXSDK#98

leenkx/Sources/leenkx/logicnode/MouseLookNode.hx

@@ -6,172 +6,162 @@ import iron.object.Object;
 import kha.System;
 import kha.FastFloat;
 
+/**
+ * MouseLookNode - FPS-style mouse look camera controller
+ * 
+ * This node provides smooth, resolution-independent mouse look functionality for 
+ * first-person perspective controls. It supports separate body and head objects,
+ * allowing for realistic FPS camera movement where the body rotates horizontally
+ * and the head/camera rotates vertically.
+ * 
+ * Key Features:
+ * - Resolution-adaptive scaling for consistent feel across different screen sizes
+ * - Configurable axis orientations (X, Y, Z as front)
+ * - Optional mouse cursor locking and hiding
+ * - Invertible X/Y axes
+ * - Rotation capping/limiting for both horizontal and vertical movement
+ * - Smoothing support for smoother camera movement
+ * - Physics integration with automatic rigid body synchronization
+ * - Support for both local and world space head rotation
+ */
 class MouseLookNode extends LogicNode {
-	// Note: This implementation works in degrees internally and converts to radians only when applying rotations
+	// Configuration properties (set from Blender node interface)
-	// Sub-pixel interpolation is always enabled for optimal precision
+	public var property0: String;  // Front axis: "X", "Y", or "Z"
-	// Features: Resolution-adaptive scaling and precise low-sensitivity support
+	public var property1: Bool;    // Hide Locked: auto-lock mouse cursor
+	public var property2: Bool;    // Invert X: invert horizontal mouse movement
+	public var property3: Bool;    // Invert Y: invert vertical mouse movement
+	public var property4: Bool;    // Cap Left/Right: limit horizontal rotation
+	public var property5: Bool;    // Cap Up/Down: limit vertical rotation
+	public var property6: Bool;    // Head Local Space: use local space for head rotation
 
-	public var property0: String; // Front axis
+	// Smoothing state variables - maintain previous frame values for interpolation
-	public var property1: Bool; // Center Mouse
+	var smoothX: Float = 0.0;      // Smoothed horizontal mouse delta
-	public var property2: Bool; // Invert X
+	var smoothY: Float = 0.0;      // Smoothed vertical mouse delta
-	public var property3: Bool; // Invert Y  
-	public var property4: Bool; // Cap Left/Right
-	public var property5: Bool; // Cap Up/Down
 	
-	// New strategy toggles
+	// Rotation limits (in radians)
-	public var property6: Bool; // Resolution-Adaptive Scaling
+	var maxHorizontal: Float = Math.PI;      // Maximum horizontal rotation (180 degrees)
+	var maxVertical: Float = Math.PI / 2;    // Maximum vertical rotation (90 degrees)
 	
-	// Smoothing variables
+	// Current rotation tracking for capping calculations
-	var smoothX: FastFloat = 0.0;
+	var currentHorizontal: Float = 0.0;      // Accumulated horizontal rotation
-	var smoothY: FastFloat = 0.0;
+	var currentVertical: Float = 0.0;        // Accumulated vertical rotation
-	
-	// Capping limits (in degrees)
-	var maxHorizontal: FastFloat = 180.0; // 180 degrees
-	var maxVertical: FastFloat = 90.0; // 90 degrees
-	
-	// Current accumulated rotations for capping
-	var currentHorizontal: FastFloat = 0.0;
-	var currentVertical: FastFloat = 0.0;
-	
-	// Sub-pixel interpolation accumulators
-	var accumulatedHorizontalRotation: FastFloat = 0.0;
-	var accumulatedVerticalRotation: FastFloat = 0.0;
-	var minimumRotationThreshold: FastFloat = 0.01; // degrees (was 0.0001 radians)
-	
-	// Frame rate independence removed - not applicable to mouse input
-	
-	// Resolution adaptive scaling
-	var baseResolutionWidth: FastFloat = 1920.0;
-	var baseResolutionHeight: FastFloat = 1080.0;
 	
+	// Resolution scaling reference - base resolution for consistent sensitivity
+	var baseResolutionWidth: Float = 1920.0;
 	
+	// Sensitivity scaling constants
+	static inline var BASE_SCALE: Float = 1500.0;              // Base sensitivity scale factor
+	static var RADIAN_SCALING_FACTOR: Float = Math.PI * 50.0 / 180.0;  // Degrees to radians conversion with sensitivity scaling
 
 	public function new(tree: LogicTree) {
 		super(tree);
 	}
 
+	/**
+	 * Main execution function called every frame when the node is active
+	 * 
+	 * Input connections:
+	 * [0] - Action trigger (not used in current implementation)
+	 * [1] - Body Object: the main object that rotates horizontally
+	 * [2] - Head Object: optional object that rotates vertically (typically camera)
+	 * [3] - Sensitivity: mouse sensitivity multiplier
+	 * [4] - Smoothing: movement smoothing factor (0.0 = no smoothing, 0.99 = maximum smoothing)
+	 */
 	override function run(from: Int) {
+		// Get input values from connected nodes
 		var bodyObject: Object = inputs[1].get();
 		var headObject: Object = inputs[2].get();
 		var sensitivity: FastFloat = inputs[3].get();
 		var smoothing: FastFloat = inputs[4].get();
 
+		// Early exit if no body object is provided
 		if (bodyObject == null) {
 			runOutput(0);
 			return;
 		}
 
+		// Get mouse input state
 		var mouse = Input.getMouse();
 		
-		// Handle mouse centering/locking
+		// Handle automatic mouse cursor locking for FPS controls
 		if (property1) {
 			if (mouse.started() && !mouse.locked) {
-				mouse.lock();
+				mouse.lock();  // Center and hide cursor, enable unlimited movement
 			}
 		}
 
-		// Only process if mouse is active
+		// Only process mouse look when cursor is locked or mouse button is held
+		// This prevents unwanted camera movement when UI elements are being used
 		if (!mouse.locked && !mouse.down()) {
 			runOutput(0);
 			return;
 		}
 
-		// Get mouse movement deltas
+		// Get raw mouse movement delta (pixels moved since last frame)
-		var deltaX: FastFloat = mouse.movementX;
+		var deltaX: Float = mouse.movementX;
-		var deltaY: FastFloat = mouse.movementY;
+		var deltaY: Float = mouse.movementY;
 
-		// Note: Sensitivity will be applied later to preserve precision for small movements
+		// Apply axis inversion if configured
+		if (property2) deltaX = -deltaX;  // Invert horizontal movement
+		if (property3) deltaY = -deltaY;  // Invert vertical movement
 
-		// Apply inversion
+		// Calculate resolution-adaptive scaling to maintain consistent sensitivity
-		if (property2) deltaX = -deltaX;
+		// across different screen resolutions. Higher resolutions will have proportionally
-		if (property3) deltaY = -deltaY;
+		// higher scaling to compensate for increased pixel density.
+		var resolutionMultiplier: Float = System.windowWidth() / baseResolutionWidth;
 
-		// Strategy 1: Resolution-Adaptive Scaling
+		// Apply movement smoothing if enabled
-		var resolutionMultiplier: FastFloat = 1.0;
+		// This creates a weighted average between current and previous movement values
-		if (property6) {
+		// to reduce jittery camera movement, especially useful for low framerates
-			var currentWidth = System.windowWidth();
-			var currentHeight = System.windowHeight();
-			resolutionMultiplier = (currentWidth / baseResolutionWidth) * (currentHeight / baseResolutionHeight);
-			resolutionMultiplier = Math.sqrt(resolutionMultiplier); // Take square root to avoid over-scaling
-		}
-
-		// Frame Rate Independence disabled for mouse input - mouse deltas are inherently frame-rate independent
-
-		// Apply smoothing
 		if (smoothing > 0.0) {
-			var smoothFactor = 1.0 - Math.min(smoothing, 0.99); // Prevent complete smoothing
+			var smoothingFactor: Float = Math.min(smoothing, 0.99);  // Cap smoothing to prevent complete freeze
-			smoothX = smoothX * smoothing + deltaX * smoothFactor;
+			smoothX = smoothX * smoothingFactor + deltaX * (1.0 - smoothingFactor);
-			smoothY = smoothY * smoothing + deltaY * smoothFactor;
+			smoothY = smoothY * smoothingFactor + deltaY * (1.0 - smoothingFactor);
 			deltaX = smoothX;
 			deltaY = smoothY;
 		}
 
-		// Determine rotation axes based on front axis setting
+		// Define rotation axes based on the configured front axis
-		var horizontalAxis = new Vec4();
+		// These determine which 3D axes are used for horizontal and vertical rotation
-		var verticalAxis = new Vec4();
+		var horizontalAxis = new Vec4();  // Axis for left/right body rotation
+		var verticalAxis = new Vec4();    // Axis for up/down head rotation
 		
 		switch (property0) {
-			case "X": // X is front
+			case "X":  // X-axis forward (e.g., for side-scrolling or specific orientations)
-				horizontalAxis.set(0, 0, 1); // Z axis for horizontal (yaw)
+				horizontalAxis.set(0, 0, 1);  // Z-axis for horizontal rotation
-				verticalAxis.set(0, 1, 0);   // Y axis for vertical (pitch)
+				verticalAxis.set(0, 1, 0);    // Y-axis for vertical rotation
-			case "Y": // Y is front (default)
+			case "Y":  // Y-axis forward (most common for 3D games)
 				#if lnx_yaxisup
-				horizontalAxis.set(0, 0, 1); // Z axis for horizontal (yaw)
+				// Y-up coordinate system (Blender default)
-				verticalAxis.set(1, 0, 0);   // X axis for vertical (pitch)
+				horizontalAxis.set(0, 0, 1);  // Z-axis for horizontal rotation
+				verticalAxis.set(1, 0, 0);    // X-axis for vertical rotation
 				#else
-				horizontalAxis.set(0, 0, 1); // Z axis for horizontal (yaw)  
+				// Z-up coordinate system
-				verticalAxis.set(1, 0, 0);   // X axis for vertical (pitch)
+				horizontalAxis.set(0, 0, 1);  // Z-axis for horizontal rotation
+				verticalAxis.set(1, 0, 0);    // X-axis for vertical rotation
 				#end
-			case "Z": // Z is front
+			case "Z":  // Z-axis forward (top-down or specific orientations)
-				horizontalAxis.set(0, 1, 0); // Y axis for horizontal (yaw)
+				horizontalAxis.set(0, 1, 0);  // Y-axis for horizontal rotation
-				verticalAxis.set(1, 0, 0);   // X axis for vertical (pitch)
+				verticalAxis.set(1, 0, 0);    // X-axis for vertical rotation
 		}
 
-		// Base scaling
+		// Calculate final sensitivity scaling combining base scale and resolution adaptation
-		var baseScale: FastFloat = 1500.0;
+		var finalScale: Float = BASE_SCALE * resolutionMultiplier;
-		var finalScale = baseScale;
 
-		// Apply resolution scaling
+		// Apply user-defined sensitivity multiplier
-		if (property6) {
-			finalScale *= resolutionMultiplier;
-		}
-
-
-
-		// Apply sensitivity scaling after all enhancement strategies to preserve precision
 		deltaX *= sensitivity;
 		deltaY *= sensitivity;
 
-		// Calculate rotation amounts (in degrees)
+		// Convert pixel movement to rotation angles (radians)
-		var horizontalRotation: FastFloat = (-deltaX / finalScale) * 180.0 / Math.PI;
+		// Negative values ensure natural movement direction (moving mouse right rotates right)
-		var verticalRotation: FastFloat = (-deltaY / finalScale) * 180.0 / Math.PI;
+		var horizontalRotation: Float = (-deltaX / finalScale) * RADIAN_SCALING_FACTOR;
+		var verticalRotation: Float = (-deltaY / finalScale) * RADIAN_SCALING_FACTOR;
 
-		// Note: Frame rate independence removed for mouse input as mouse deltas
+		// Apply horizontal rotation capping if enabled
-		// are already frame-rate independent by nature. Mouse input represents
+		// This prevents the character from rotating beyond specified limits
-		// instantaneous user intent, not time-based movement.
+		if (property4) {
-
-		// Strategy 2: Sub-Pixel Interpolation (always enabled)
-		accumulatedHorizontalRotation += horizontalRotation;
-		accumulatedVerticalRotation += verticalRotation;
-		
-		// Only apply rotation if accumulated amount exceeds threshold
-		if (Math.abs(accumulatedHorizontalRotation) >= minimumRotationThreshold) {
-			horizontalRotation = accumulatedHorizontalRotation;
-			accumulatedHorizontalRotation = 0.0;
-		} else {
-			horizontalRotation = 0.0;
-		}
-		
-		if (Math.abs(accumulatedVerticalRotation) >= minimumRotationThreshold) {
-			verticalRotation = accumulatedVerticalRotation;
-			accumulatedVerticalRotation = 0.0;
-		} else {
-			verticalRotation = 0.0;
-		}
-
-		// Apply capping constraints
-		if (property4) { // Cap Left/Right
 			currentHorizontal += horizontalRotation;
+			// Clamp rotation to maximum horizontal range and adjust current frame rotation
 			if (currentHorizontal > maxHorizontal) {
 				horizontalRotation -= (currentHorizontal - maxHorizontal);
 				currentHorizontal = maxHorizontal;
@@ -181,8 +171,11 @@ class MouseLookNode extends LogicNode {
 			}
 		}
 
-		if (property5) { // Cap Up/Down
+		// Apply vertical rotation capping if enabled
+		// This prevents looking too far up or down (like human neck limitations)
+		if (property5) {
 			currentVertical += verticalRotation;
+			// Clamp rotation to maximum vertical range and adjust current frame rotation
 			if (currentVertical > maxVertical) {
 				verticalRotation -= (currentVertical - maxVertical);
 				currentVertical = maxVertical;
@@ -192,41 +185,49 @@ class MouseLookNode extends LogicNode {
 			}
 		}
 
-		// Apply horizontal rotation to body (yaw)
+		// Apply horizontal rotation to body object (character turning left/right)
-		if (Math.abs(horizontalRotation) > 0.01) { // 0.01 degrees threshold
+		if (horizontalRotation != 0.0) {
-			bodyObject.transform.rotate(horizontalAxis, horizontalRotation * Math.PI / 180.0); // Convert degrees to radians
+			bodyObject.transform.rotate(horizontalAxis, horizontalRotation);
 			
-			// Sync physics if needed
+			// Synchronize physics rigid body if present
+			// This ensures physics simulation stays in sync with visual transform
 			#if lnx_physics
 			var rigidBody = bodyObject.getTrait(leenkx.trait.physics.RigidBody);
 			if (rigidBody != null) rigidBody.syncTransform();
 			#end
 		}
 
-		// Apply vertical rotation to head (pitch) if head object is provided
+		// Apply vertical rotation to head object (camera looking up/down)
-		if (headObject != null && Math.abs(verticalRotation) > 0.01) { // 0.01 degrees threshold
+		if (headObject != null && verticalRotation != 0.0) {
-			// For head rotation, use the head's local coordinate system
+			if (property6) {
+				// Local space rotation - recommended when head is a child of body
+				// This prevents gimbal lock and rotation inheritance issues
+				headObject.transform.rotate(verticalAxis, verticalRotation);
+			} else {
+				// World space rotation - uses head object's current right vector
+				// More accurate for independent head objects but can cause issues with parenting
 				var headVerticalAxis = headObject.transform.world.right();
-			headObject.transform.rotate(headVerticalAxis, verticalRotation * Math.PI / 180.0); // Convert degrees to radians
+				headObject.transform.rotate(headVerticalAxis, verticalRotation);
+			}
 			
-			// Sync physics if needed
+			// Synchronize head physics rigid body if present
 			#if lnx_physics
 			var headRigidBody = headObject.getTrait(leenkx.trait.physics.RigidBody);
 			if (headRigidBody != null) headRigidBody.syncTransform();
 			#end
-		} else if (headObject == null) {
+		} else if (headObject == null && verticalRotation != 0.0) {
-			// If no head object, apply vertical rotation to body as well
+			// Fallback: if no separate head object, apply vertical rotation to body
-			if (Math.abs(verticalRotation) > 0.01) { // 0.01 degrees threshold
+			// This creates a simpler single-object camera control
-				bodyObject.transform.rotate(verticalAxis, verticalRotation * Math.PI / 180.0); // Convert degrees to radians
+			bodyObject.transform.rotate(verticalAxis, verticalRotation);
 			
-				// Sync physics if needed
+			// Synchronize body physics rigid body
 			#if lnx_physics
 			var rigidBody = bodyObject.getTrait(leenkx.trait.physics.RigidBody);
 			if (rigidBody != null) rigidBody.syncTransform();
 			#end
 		}
-		}
 
+		// Continue to next connected node in the logic tree
 		runOutput(0);
 	}
 } 

leenkx/Sources/leenkx/trait/physics/bullet/RigidBody.hx

@@ -36,6 +36,18 @@ class RigidBody extends iron.Trait {
 	var useDeactivation: Bool;
 	var deactivationParams: Array<Float>;
 	var ccd = false; // Continuous collision detection
+	// New velocity limiting properties
+	var linearVelocityMin: Float;
+	var linearVelocityMax: Float;
+	var angularVelocityMin: Float;
+	var angularVelocityMax: Float;
+	// New lock properties
+	var lockTranslationX: Bool;
+	var lockTranslationY: Bool;
+	var lockTranslationZ: Bool;
+	var lockRotationX: Bool;
+	var lockRotationY: Bool;
+	var lockRotationZ: Bool;
 	public var group = 1;
 	public var mask = 1;
 	var trigger = false;
@@ -120,7 +132,17 @@ class RigidBody extends iron.Trait {
 			collisionMargin: 0.0,
 			linearDeactivationThreshold: 0.0,
 			angularDeactivationThrshold: 0.0,
-			deactivationTime: 0.0
+			deactivationTime: 0.0,
+			linearVelocityMin: 0.0,
+			linearVelocityMax: 0.0,
+			angularVelocityMin: 0.0,
+			angularVelocityMax: 0.0,
+			lockTranslationX: false,
+			lockTranslationY: false,
+			lockTranslationZ: false,
+			lockRotationX: false,
+			lockRotationY: false,
+			lockRotationZ: false
 		};
 
 		if (flags == null) flags = {
@@ -139,6 +161,18 @@ class RigidBody extends iron.Trait {
 		this.angularFactors = [params.angularFactorsX, params.angularFactorsY, params.angularFactorsZ];
 		this.collisionMargin = params.collisionMargin;
 		this.deactivationParams = [params.linearDeactivationThreshold, params.angularDeactivationThrshold, params.deactivationTime];
+		// New velocity limiting properties
+		this.linearVelocityMin = params.linearVelocityMin;
+		this.linearVelocityMax = params.linearVelocityMax;
+		this.angularVelocityMin = params.angularVelocityMin;
+		this.angularVelocityMax = params.angularVelocityMax;
+		// New lock properties
+		this.lockTranslationX = params.lockTranslationX;
+		this.lockTranslationY = params.lockTranslationY;
+		this.lockTranslationZ = params.lockTranslationZ;
+		this.lockRotationX = params.lockRotationX;
+		this.lockRotationY = params.lockRotationY;
+		this.lockRotationZ = params.lockRotationZ;
 		this.animated = flags.animated;
 		this.trigger = flags.trigger;
 		this.ccd = flags.ccd;
@@ -291,11 +325,25 @@ class RigidBody extends iron.Trait {
 		}
 
 		if (linearFactors != null) {
-			setLinearFactor(linearFactors[0], linearFactors[1], linearFactors[2]);
+			// Apply lock properties by overriding factors
+			var lx = linearFactors[0];
+			var ly = linearFactors[1];
+			var lz = linearFactors[2];
+			if (lockTranslationX) lx = 0.0;
+			if (lockTranslationY) ly = 0.0;
+			if (lockTranslationZ) lz = 0.0;
+			setLinearFactor(lx, ly, lz);
 		}
 
 		if (angularFactors != null) {
-			setAngularFactor(angularFactors[0], angularFactors[1], angularFactors[2]);
+			// Apply lock properties by overriding factors
+			var ax = angularFactors[0];
+			var ay = angularFactors[1];
+			var az = angularFactors[2];
+			if (lockRotationX) ax = 0.0;
+			if (lockRotationY) ay = 0.0;
+			if (lockRotationZ) az = 0.0;
+			setAngularFactor(ax, ay, az);
 		}
 
 		if (trigger) bodyColl.setCollisionFlags(bodyColl.getCollisionFlags() | CF_NO_CONTACT_RESPONSE);
@@ -411,6 +459,55 @@ class RigidBody extends iron.Trait {
 			var rbs = physics.getContacts(this);
 			if (rbs != null) for (rb in rbs) for (f in onContact) f(rb);
 		}
+
+		// Apply velocity limiting if enabled
+		if (!animated && !staticObj) {
+			applyVelocityLimits();
+		}
+	}
+
+	function applyVelocityLimits() {
+		if (!ready) return;
+		
+		// Check linear velocity limits
+		if (linearVelocityMin > 0.0 || linearVelocityMax > 0.0) {
+			var velocity = getLinearVelocity();
+			var speed = velocity.length();
+			
+			if (linearVelocityMin > 0.0 && speed < linearVelocityMin) {
+				// Increase velocity to minimum
+				if (speed > 0.0) {
+					velocity.normalize();
+					velocity.mult(linearVelocityMin);
+					setLinearVelocity(velocity.x, velocity.y, velocity.z);
+				}
+			} else if (linearVelocityMax > 0.0 && speed > linearVelocityMax) {
+				// Clamp velocity to maximum
+				velocity.normalize();
+				velocity.mult(linearVelocityMax);
+				setLinearVelocity(velocity.x, velocity.y, velocity.z);
+			}
+		}
+		
+		// Check angular velocity limits
+		if (angularVelocityMin > 0.0 || angularVelocityMax > 0.0) {
+			var angularVel = getAngularVelocity();
+			var angularSpeed = angularVel.length();
+			
+			if (angularVelocityMin > 0.0 && angularSpeed < angularVelocityMin) {
+				// Increase angular velocity to minimum
+				if (angularSpeed > 0.0) {
+					angularVel.normalize();
+					angularVel.mult(angularVelocityMin);
+					setAngularVelocity(angularVel.x, angularVel.y, angularVel.z);
+				}
+			} else if (angularVelocityMax > 0.0 && angularSpeed > angularVelocityMax) {
+				// Clamp angular velocity to maximum
+				angularVel.normalize();
+				angularVel.mult(angularVelocityMax);
+				setAngularVelocity(angularVel.x, angularVel.y, angularVel.z);
+			}
+		}
 	}
 
 	public function disableCollision() {
@@ -745,6 +842,16 @@ typedef RigidBodyParams = {
 	var linearDeactivationThreshold: Float;
 	var angularDeactivationThrshold: Float;
 	var deactivationTime: Float;
+	var linearVelocityMin: Float;
+	var linearVelocityMax: Float;
+	var angularVelocityMin: Float;
+	var angularVelocityMax: Float;
+	var lockTranslationX: Bool;
+	var lockTranslationY: Bool;
+	var lockTranslationZ: Bool;
+	var lockRotationX: Bool;
+	var lockRotationY: Bool;
+	var lockRotationZ: Bool;
 }
 
 typedef RigidBodyFlags = {

leenkx/blender/lnx/exporter.py

@@ -2843,6 +2843,18 @@ class LeenkxExporter:
             body_params['linearDeactivationThreshold'] = deact_lv
             body_params['angularDeactivationThrshold'] = deact_av
             body_params['deactivationTime'] = deact_time
+            # New velocity limit properties
+            body_params['linearVelocityMin'] = bobject.lnx_rb_linear_velocity_min
+            body_params['linearVelocityMax'] = bobject.lnx_rb_linear_velocity_max
+            body_params['angularVelocityMin'] = bobject.lnx_rb_angular_velocity_min
+            body_params['angularVelocityMax'] = bobject.lnx_rb_angular_velocity_max
+            # New lock properties
+            body_params['lockTranslationX'] = bobject.lnx_rb_lock_translation_x
+            body_params['lockTranslationY'] = bobject.lnx_rb_lock_translation_y
+            body_params['lockTranslationZ'] = bobject.lnx_rb_lock_translation_z
+            body_params['lockRotationX'] = bobject.lnx_rb_lock_rotation_x
+            body_params['lockRotationY'] = bobject.lnx_rb_lock_rotation_y
+            body_params['lockRotationZ'] = bobject.lnx_rb_lock_rotation_z
             body_flags = {}
             body_flags['animated'] = rb.kinematic
             body_flags['trigger'] = bobject.lnx_rb_trigger

leenkx/blender/lnx/logicnode/input/LN_mouse_look.py

@@ -2,100 +2,158 @@ from lnx.logicnode.lnx_nodes import *
 
 
 class MouseLookNode(LnxLogicTreeNode):
-    """Controls object rotation based on mouse movement for FPS-style camera control.
+    """MouseLookNode - Blender UI interface for FPS-style mouse look camera controller
+    
+    This class defines the Blender node interface for the MouseLookNode logic node.
+    It creates the visual node that appears in Blender's logic tree editor and
+    defines all the properties that configure the mouse look behavior.
+    
+    The node provides controls for:
+    - Axis orientation configuration
+    - Mouse cursor behavior
+    - Movement inversion options
+    - Rotation limiting/capping
+    - Head rotation space behavior
     
     Features:
-    - Sub-pixel interpolation (always enabled) for optimal precision and smooth low-sensitivity movement
+    - Built-in resolution-adaptive scaling for consistent feel across different screen resolutions
-    - Resolution-adaptive scaling for consistent feel across different screen resolutions
+    - Automatic physics synchronization for rigid bodies
+    - Support for both single-object and dual-object (body/head) setups
     """
-    bl_idname = 'LNMouseLookNode'
-    bl_label = 'Mouse Look'
-    lnx_section = 'mouse'
-    lnx_version = 1
     
-    # Front axis property
+    # Blender node identification
+    bl_idname = 'LNMouseLookNode'           # Unique identifier for Blender's node system
+    bl_label = 'Mouse Look'                 # Display name in node menu and header
+    lnx_section = 'mouse'                   # Category section in node add menu
+    lnx_version = 1                         # Node version for compatibility tracking
+
+    # Property 0: Front Axis Configuration
+    # Determines which 3D axis represents the "forward" direction of the character/camera
+    # This affects how horizontal and vertical rotations are applied to the objects
     property0: HaxeEnumProperty(
         'property0',
-        items=[('X', 'X Axis', 'X Axis as front'),
+        items=[('X', 'X Axis', 'X Axis as front'),     # X-forward (side-scrolling, specific orientations)
-               ('Y', 'Y Axis', 'Y Axis as front'),
+               ('Y', 'Y Axis', 'Y Axis as front'),     # Y-forward (most common for 3D games)
-               ('Z', 'Z Axis', 'Z Axis as front')],
+               ('Z', 'Z Axis', 'Z Axis as front')],    # Z-forward (top-down, specific orientations)
-        name='Front', default='Y')
+        name='Front', 
+        default='Y')    # Y-axis is default as it's most common in 3D game development
     
-    # Hide Locked property
+    # Property 1: Automatic Mouse Cursor Management
+    # When enabled, automatically centers and locks the mouse cursor when mouse input starts
+    # This is essential for FPS games to prevent cursor from leaving game window
     property1: HaxeBoolProperty(
         'property1',
         name='Hide Locked',
-        description='Automatically center and lock the mouse cursor',
+        description='Automatically center and lock the mouse cursor when mouse input begins',
-        default=True)
+        default=True)   # Enabled by default for typical FPS behavior
     
-    # Invert X property
+    # Property 2: Horizontal Movement Inversion
+    # Allows users to invert horizontal mouse movement (left becomes right, right becomes left)
+    # Some players prefer inverted controls for consistency with flight simulators
     property2: HaxeBoolProperty(
         'property2',
         name='Invert X',
-        description='Invert horizontal mouse movement',
+        description='Invert horizontal mouse movement - moving mouse right turns character left',
-        default=False)
+        default=False)  # Most players expect non-inverted horizontal movement
     
-    # Invert Y property  
+    # Property 3: Vertical Movement Inversion
+    # Allows users to invert vertical mouse movement (up becomes down, down becomes up)
+    # More commonly used than horizontal inversion, especially by flight sim players
     property3: HaxeBoolProperty(
         'property3',
         name='Invert Y',
-        description='Invert vertical mouse movement',
+        description='Invert vertical mouse movement - moving mouse up looks down',
-        default=False)
+        default=False)  # Most players expect non-inverted vertical movement
     
-    # Cap Left/Right property
+    # Property 4: Horizontal Rotation Limiting
+    # Prevents the character from rotating beyond specified horizontal limits
+    # Useful for fixed-perspective games or when character shouldn't turn completely around
     property4: HaxeBoolProperty(
         'property4',
         name='Cap Left / Right',
-        description='Limit horizontal rotation',
+        description='Limit horizontal rotation to prevent full 360-degree turns',
-        default=False)
+        default=False)  # Disabled by default - most FPS games allow full horizontal rotation
     
-    # Cap Up/Down property
+    # Property 5: Vertical Rotation Limiting
+    # Prevents looking too far up or down, simulating human neck movement limitations
+    # Essential for realistic FPS games to prevent disorienting over-rotation
     property5: HaxeBoolProperty(
         'property5',
         name='Cap Up / Down',
-        description='Limit vertical rotation',
+        description='Limit vertical rotation to simulate natural neck movement (±90 degrees)',
-        default=True)
+        default=True)   # Enabled by default for realistic FPS behavior
     
-    # Strategy toggles
+    # Property 6: Head Rotation Space Mode
+    # Controls whether head rotation uses local or world space coordinates
+    # Critical for preventing rotation issues when head object is child of body object
     property6: HaxeBoolProperty(
         'property6',
-        name='Resolution Adaptive',
+        name='Head Local Space',
-        description='Scale sensitivity based on screen resolution',
+        description='Use local space for head rotation - enable when Head is child of Body to avoid gimbal lock',
-        default=False)
+        default=False)  # Disabled by default, enable when using parent-child object relationships
-    
-
-    
     
 
     def lnx_init(self, context):
-        self.add_input('LnxNodeSocketAction', 'In')
+        """Initialize the node's input and output sockets
-        self.add_input('LnxNodeSocketObject', 'Body')
-        self.add_input('LnxNodeSocketObject', 'Head')
-        self.add_input('LnxFloatSocket', 'Sensitivity', default_value=0.5)
-        self.add_input('LnxFloatSocket', 'Smoothing', default_value=0.0)
         
+        This method is called when the node is first created in Blender.
+        It defines all the connection points (sockets) that other nodes can connect to.
+        
+        Input Sockets:
+        - Action In: Execution flow input (when this node should run)
+        - Body: The main character/player object that rotates horizontally
+        - Head: Optional camera/head object that rotates vertically (can be child of Body)
+        - Sensitivity: Mouse sensitivity multiplier (0.5 = half sensitivity, 2.0 = double sensitivity)
+        - Smoothing: Movement smoothing factor (0.0 = no smoothing, higher = more smoothing)
+        
+        Output Sockets:
+        - Action Out: Execution flow output (continues to next node after processing)
+        """
+        
+        # Execution flow input - connects from previous logic node
+        self.add_input('LnxNodeSocketAction', 'In')
+        
+        # Object inputs - require 3D objects from the scene
+        self.add_input('LnxNodeSocketObject', 'Body')      # Main character object (required)
+        self.add_input('LnxNodeSocketObject', 'Head')      # Camera/head object (optional)
+        
+        # Numeric inputs with sensible defaults
+        self.add_input('LnxFloatSocket', 'Sensitivity', default_value=0.5)  # Medium sensitivity
+        self.add_input('LnxFloatSocket', 'Smoothing', default_value=0.0)    # No smoothing by default
+        
+        # Execution flow output - connects to next logic node
         self.add_output('LnxNodeSocketAction', 'Out')
 
     def draw_buttons(self, context, layout):
-        layout.prop(self, 'property0', text='Front')
+        """Draw the node's user interface in Blender's logic tree editor
-        layout.prop(self, 'property1', text='Hide Locked')
         
-        # Invert XY section
+        This method creates the visual controls that appear on the node in Blender.
-        col = layout.column(align=True)
+        It organizes properties into logical groups for better usability.
-        col.label(text="Invert XY:")
-        row = col.row(align=True)
-        row.prop(self, 'property2', text='X', toggle=True)
-        row.prop(self, 'property3', text='Y', toggle=True)
         
-        # Cap rotations section
+        Args:
-        col = layout.column(align=True)
+            context: Blender context (current scene, selected objects, etc.)
-        col.prop(self, 'property4', text='Cap Left / Right')
+            layout: UI layout object for arranging interface elements
-        col.prop(self, 'property5', text='Cap Up / Down')
+        """
         
-        # Separator
+        # Basic configuration section
-        layout.separator()
+        layout.prop(self, 'property0', text='Front')       # Front axis dropdown
+        layout.prop(self, 'property1', text='Hide Locked') # Mouse locking checkbox
         
-        # Enhancement strategies section
+        # Movement inversion controls section
-        col = layout.column(align=True)
+        # Group X and Y inversion together for logical organization
-        col.label(text="Enhancement Strategies:")
+        col = layout.column(align=True)                     # Create aligned column
-        col.prop(self, 'property6', text='Resolution Adaptive') 
+        col.label(text="Invert XY:")                        # Section header
+        row = col.row(align=True)                           # Create horizontal row within column
+        row.prop(self, 'property2', text='X', toggle=True)  # X inversion toggle button
+        row.prop(self, 'property3', text='Y', toggle=True)  # Y inversion toggle button
+        
+        # Rotation limiting controls section
+        # Group rotation caps together since they're related functionality
+        col = layout.column(align=True)                     # Create new aligned column
+        col.prop(self, 'property4', text='Cap Left / Right') # Horizontal capping checkbox
+        col.prop(self, 'property5', text='Cap Up / Down')    # Vertical capping checkbox
+        
+        # Advanced head behavior section
+        # Separate advanced option that affects technical behavior
+        col = layout.column(align=True)                     # Create new aligned column
+        col.prop(self, 'property6', text='Head Local Space') # Head rotation space checkbox 

leenkx/blender/lnx/props.py

@@ -368,6 +368,26 @@ def init_properties():
             default=(True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False),
             size=20,
             subtype='LAYER')
+    
+    # Linear velocity limits
+    bpy.types.Object.lnx_rb_linear_velocity_min = FloatProperty(name="Linear Velocity Min", description="Minimum linear velocity", default=0.0, min=0.0)
+    bpy.types.Object.lnx_rb_linear_velocity_max = FloatProperty(name="Linear Velocity Max", description="Maximum linear velocity", default=0.0, min=0.0)
+    
+    # Angular velocity limits
+    bpy.types.Object.lnx_rb_angular_velocity_min = FloatProperty(name="Angular Velocity Min", description="Minimum angular velocity", default=0.0, min=0.0)
+    bpy.types.Object.lnx_rb_angular_velocity_max = FloatProperty(name="Angular Velocity Max", description="Maximum angular velocity", default=0.0, min=0.0)
+    
+    
+    # Lock translation axes
+    bpy.types.Object.lnx_rb_lock_translation_x = BoolProperty(name="Lock Translation X", description="Lock movement along X axis", default=False)
+    bpy.types.Object.lnx_rb_lock_translation_y = BoolProperty(name="Lock Translation Y", description="Lock movement along Y axis", default=False)
+    bpy.types.Object.lnx_rb_lock_translation_z = BoolProperty(name="Lock Translation Z", description="Lock movement along Z axis", default=False)
+    
+    # Lock rotation axes
+    bpy.types.Object.lnx_rb_lock_rotation_x = BoolProperty(name="Lock Rotation X", description="Lock rotation around X axis", default=False)
+    bpy.types.Object.lnx_rb_lock_rotation_y = BoolProperty(name="Lock Rotation Y", description="Lock rotation around Y axis", default=False)
+    bpy.types.Object.lnx_rb_lock_rotation_z = BoolProperty(name="Lock Rotation Z", description="Lock rotation around Z axis", default=False)
+    
     bpy.types.Object.lnx_relative_physics_constraint = BoolProperty(name="Relative Physics Constraint", description="Add physics constraint relative to the parent object or collection when spawned", default=False)
     bpy.types.Object.lnx_animation_enabled = BoolProperty(name="Animation", description="Enable skinning & timeline animation", default=True)
     bpy.types.Object.lnx_tilesheet = StringProperty(name="Tilesheet", description="Set tilesheet animation", default='')

leenkx/blender/lnx/props_ui.py

@@ -240,6 +240,36 @@ class LNX_PT_PhysicsPropsPanel(bpy.types.Panel):
             layout.prop(obj, 'lnx_rb_linear_factor')
             layout.prop(obj, 'lnx_rb_angular_factor')
             layout.prop(obj, 'lnx_rb_angular_friction')
+            
+            # Linear Velocity section
+            layout.separator()
+            layout.label(text="Linear Velocity:")
+            layout.prop(obj, 'lnx_rb_linear_velocity_min')
+            layout.prop(obj, 'lnx_rb_linear_velocity_max')
+            
+            # Angular Velocity section
+            layout.separator()
+            layout.label(text="Angular Velocity:")
+            layout.prop(obj, 'lnx_rb_angular_velocity_min')
+            layout.prop(obj, 'lnx_rb_angular_velocity_max')
+            
+            
+            # Lock Translation section
+            layout.separator()
+            layout.label(text="Lock Translation:")
+            row = layout.row(align=True)
+            row.prop(obj, 'lnx_rb_lock_translation_x', text="X")
+            row.prop(obj, 'lnx_rb_lock_translation_y', text="Y")
+            row.prop(obj, 'lnx_rb_lock_translation_z', text="Z")
+            
+            # Lock Rotation section
+            layout.separator()
+            layout.label(text="Lock Rotation:")
+            row = layout.row(align=True)
+            row.prop(obj, 'lnx_rb_lock_rotation_x', text="X")
+            row.prop(obj, 'lnx_rb_lock_rotation_y', text="Y")
+            row.prop(obj, 'lnx_rb_lock_rotation_z', text="Z")
+            
             layout.prop(obj, 'lnx_rb_trigger')
             layout.prop(obj, 'lnx_rb_ccd')
             layout.prop(obj, 'lnx_rb_interpolate')