add vr template project

addons/godot-xr-tools/objects/force_body/force_body.gd

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+@tool
+class_name XRToolsForceBody
+extends AnimatableBody3D
+
+
+## XRTools Force Body script
+##
+## This script enhances AnimatableBody3D with move_and_slide and the ability
+## to push bodies by emparting forces on them.
+
+
+## Force Body Collision
+class ForceBodyCollision:
+	## Collider object
+	var collider : Node3D
+
+	## Collision point
+	var position : Vector3
+
+	## Collision normal
+	var normal : Vector3
+
+
+## Enables or disables pushing bodies
+@export var push_bodies : bool = true
+
+## Control the stiffness of the body
+@export var stiffness : float = 10.0
+
+## Control the maximum push force
+@export var maximum_force : float = 1.0
+
+## Maximum slides
+@export var max_slides : int = 4
+
+
+## Add support for is_xr_class on XRTools classes
+func is_xr_class(name : String) -> bool:
+	return name == "XRToolsForceBody"
+
+
+## This function moves and slides along the [param move] vector. It returns
+## information about the last collision, or null if no collision
+func move_and_slide(move : Vector3) -> ForceBodyCollision:
+	# Make sure this is off or weird shit happens...
+	sync_to_physics = false
+
+	# Loop performing the movement steps
+	var step_move := move
+	var ret : ForceBodyCollision = null
+	for step in max_slides:
+		# Take the next step
+		var collision := move_and_collide(step_move)
+
+		# If we didn't collide with anything then we have finished the entire
+		# move_and_slide operation
+		if not collision:
+			break
+
+		# Save relevant collision information
+		var collider := collision.get_collider()
+		var postion := collision.get_position()
+		var normal := collision.get_normal()
+
+		# Save the collision information
+		if not ret:
+			ret = ForceBodyCollision.new()
+
+		ret.collider = collider
+		ret.position = postion
+		ret.normal = normal
+
+		# Calculate the next move
+		var next_move := collision.get_remainder().slide(normal)
+
+		# Handle pushing bodies
+		if push_bodies:
+			var body := collider as RigidBody3D
+			if body:
+				# Calculate the momentum lost by the collision
+				var lost_momentum := step_move - next_move
+
+				# TODO: We should consider the velocity of the body such that
+				# we never push it away faster than our own velocity.
+
+				# Apply the lost momentum as an impulse to the body we hit
+				body.apply_impulse(
+					(lost_momentum * stiffness).limit_length(maximum_force),
+					position - body.global_position)
+
+		# Update the remaining movement
+		step_move = next_move
+
+		# Prevent bouncing back along movement path
+		if next_move.dot(move) <= 0:
+			break
+
+	# Return the last collision data
+	return ret

addons/godot-xr-tools/objects/force_body/force_body.gd.uid

@@ -0,0 +1 @@
+uid://pc8g5reafi7c