Additional 3D physics tests - RigidBody impact and ground check (#619)

Co-authored-by: Camille Mohr-Daurat <pouleyKetchoup@gmail.com>

3d/physics_tests/utils/rigidbody_ground_check.gd

@@ -0,0 +1,47 @@
+extends RigidBody
+
+
+onready var _forward = - transform.basis.z
+onready var _collision_shape = $CollisionShape
+onready var _material = $CollisionShape/MeshInstance.get_surface_material(0)
+
+var _dir = 1.0
+var _distance = 10.0
+var _walk_spd = 100.0
+var _acceleration = 22.0
+var _gravity_impulse = 30.0
+var _is_on_floor = false
+
+
+func _process(_delta):
+	if _is_on_floor:
+		_material.albedo_color = Color.white
+	else:
+		_material.albedo_color = Color.red
+
+
+func _integrate_forces(state):
+	var delta = state.step
+	var velocity = (_forward * _dir * _walk_spd * delta) + (state.linear_velocity  * Vector3.UP)
+	state.linear_velocity = state.linear_velocity.move_toward(velocity, _acceleration * delta)
+
+	if state.transform.origin.z < -_distance:
+		_dir = -1
+	if state.transform.origin.z > _distance:
+		_dir = 1
+
+	ground_check()
+
+
+func ground_check():
+	var space_state = get_world().direct_space_state
+	var shape = PhysicsShapeQueryParameters.new()
+	shape.transform = _collision_shape.global_transform
+	shape.shape_rid = _collision_shape.shape.get_rid()
+	shape.collision_mask = 2
+	var result = space_state.get_rest_info(shape)
+	if result:
+		_is_on_floor = true
+	else:
+		_is_on_floor = false
+

3d/physics_tests/utils/rigidbody_pick.gd

@@ -47,7 +47,8 @@ func _physics_process(delta):
 			world_delta = camera_basis * world_delta
 
 			var camera_dist = camera.global_transform.origin.distance_to(global_transform.origin)
-			world_delta *= CAMERA_DISTANCE_COEFFICIENT * camera_dist
+			var fov_coefficient = camera.fov / 70.0
+			world_delta *= CAMERA_DISTANCE_COEFFICIENT * camera_dist * fov_coefficient
 
 		if mode == MODE_STATIC:
 			global_transform.origin += world_delta