3D Physics and Other Stuff

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-New Vehicle (Based on Bullet's RaycastVehicle) - Vehiclebody/VehicleWheel. Demo will come soon, old vehicle (CarBody) will go away soon too.
-A lot of fixes to the 3D physics engine
-Added KinematicBody with demo
-Fixed the space query API for 2D (demo will come soon). 3D is WIP.
-Fixed long-standing bug with body_enter/body_exit for Area and Area2D
-Performance variables now includes physics (active bodies, collision pairs and islands)
-Ability to see what's inside of instanced scenes!
-Fixed Blend Shapes (no bs+skeleton yet)
-Added an Android JavaClassWrapper singleton for using Android native classes directly from GDScript. This is very Alpha!

1 files changed, 92 insertions, 0 deletions

diff --git a/demos/3d/kinematic_char/follow_camera.gd b/demos/3d/kinematic_char/follow_camera.gd
new file mode 100644
index 0000000000..0b9ff9bbb2
--- /dev/null
+++ b/demos/3d/kinematic_char/follow_camera.gd
@@ -0,0 +1,92 @@
+
+extends Camera
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+var collision_exception=[]
+export var min_distance=0.5
+export var max_distance=4.0
+export var angle_v_adjust=0.0
+export var autoturn_ray_aperture=25
+export var autoturn_speed=50
+var max_height = 2.0
+var min_height = 0
+
+func _fixed_process(dt):
+	var target  = get_parent().get_global_transform().origin
+	var pos = get_global_transform().origin
+	var up = Vector3(0,1,0)
+	
+	var delta = pos - target
+	
+	#regular delta follow
+	
+	#check ranges
+	
+	if (delta.length() < min_distance):
+		delta = delta.normalized() * min_distance
+	elif (delta.length() > max_distance):
+		delta = delta.normalized() * max_distance
+	
+	#check upper and lower height
+	if ( delta.y > max_height):
+		delta.y = max_height
+	if ( delta.y < min_height):
+		delta.y = min_height
+		
+	#check autoturn
+	
+	var ds = PhysicsServer.space_get_direct_state( get_world().get_space() )
+	
+	
+	var col_left = ds.intersect_ray(target,target+Matrix3(up,deg2rad(autoturn_ray_aperture)).xform(delta),collision_exception)
+	var col = ds.intersect_ray(target,target,collision_exception)
+	var col_right = ds.intersect_ray(target,target+Matrix3(up,deg2rad(-autoturn_ray_aperture)).xform(delta),collision_exception)
+	
+	if (col!=null):
+		#if main ray was occluded, get camera closer, this is the worst case scenario
+		delta = col.position - target	
+	elif (col_left!=null and col_right==null):
+		#if only left ray is occluded, turn the camera around to the right
+		delta = Matrix3(up,deg2rad(-dt*autoturn_speed)).xform(delta)
+	elif (col_left==null and col_right!=null):
+		#if only right ray is occluded, turn the camera around to the left
+		delta = Matrix3(up,deg2rad(dt*autoturn_speed)).xform(delta)
+	else:
+		#do nothing otherwise, left and right are occluded but center is not, so do not autoturn
+		pass
+	
+	#apply lookat
+	pos = target + delta
+	
+	look_at_from_pos(pos,target,up)
+	
+	#turn a little up or down
+	var t = get_transform()
+	t.basis = Matrix3(t.basis[0],deg2rad(angle_v_adjust)) * t.basis
+	set_transform(t)
+	
+	
+
+func _ready():
+
+#find collision exceptions for ray
+	var node = self
+	while(node):
+		if (node extends RigidBody):
+			collision_exception.append(node.get_rid())
+			break
+		else:
+			node=node.get_parent()
+	# Initalization here
+	set_fixed_process(true)
+	#this detaches the camera transform from the parent spatial node
+	set_as_toplevel(true)
+
+	
+	
+
+
+