Fix players unable to jump when between two walls

scenes/player.tscn

@@ -10,7 +10,7 @@ height = 0.5
 
 [sub_resource type="RayShape" id=2]
 
-length = 0.3
+length = 0.1
 _sections_unfolded = [ "Resource" ]
 
 [sub_resource type="PrismMesh" id=3]
@@ -29,7 +29,7 @@ radial_segments = 64
 rings = 8
 _sections_unfolded = [ "Resource" ]
 
-[node name="RigidBody" type="RigidBody" groups=[
+[node name="RigidBody" type="RigidBody" index="0" groups=[
 "player",
 ]]
 
@@ -44,8 +44,8 @@ bounce = 0.0
 gravity_scale = 1.0
 custom_integrator = false
 continuous_cd = true
-contacts_reported = 0
-contact_monitor = false
+contacts_reported = 1
+contact_monitor = true
 sleeping = false
 can_sleep = false
 axis_lock_linear_x = false
@@ -63,32 +63,34 @@ _sections_unfolded = [ "Angular", "Axis Lock", "Collision", "Linear", "Transform
 
 [node name="Body" type="CollisionShape" parent="." index="0"]
 
-transform = Transform( 1, 0, 0, 0, -1.62921e-07, -1, 0, 1, -1.62921e-07, 0, 0.95, 0 )
+transform = Transform( 1, 0, 0, 0, -1.62921e-07, -1, 0, 1, -1.62921e-07, 0, 0.75, 0 )
 shape = SubResource( 1 )
 disabled = false
 _sections_unfolded = [ "Pause", "Transform", "Visibility" ]
 
 [node name="Leg" type="CollisionShape" parent="." index="1"]
 
-transform = Transform( 1, 0, 0, 0, -1.62921e-07, -1, 0, 1, -1.62921e-07, 0.05, 0.35, 0 )
+transform = Transform( 1, 0, 0, 0, -1.62921e-07, -1, 0, 1, -1.62921e-07, 0.05, 0.1, 0 )
 shape = SubResource( 2 )
 disabled = false
 _sections_unfolded = [ "Transform", "Visibility" ]
 
 [node name="Ray" type="RayCast" parent="." index="2"]
 
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.3, 0 )
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.15, 0 )
 enabled = true
 exclude_parent = true
-cast_to = Vector3( 0, -0.3, 0 )
+cast_to = Vector3( 0, -0.2, 0 )
 collision_mask = 1
 _sections_unfolded = [ "Transform", "Visibility" ]
 
 [node name="Yaw" type="Spatial" parent="." index="3"]
 
+_sections_unfolded = [ "Transform" ]
+
 [node name="Pitch" type="Spatial" parent="Yaw" index="0"]
 
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.4, 0 )
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.19053, 0 )
 _sections_unfolded = [ "Transform" ]
 
 [node name="MeshInstance" type="MeshInstance" parent="Yaw/Pitch" index="0"]
@@ -154,7 +156,7 @@ max_lines_visible = -1
 
 [node name="TPCamera" type="Spatial" parent="." index="5"]
 
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.74343, 0 )
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.56913, 0 )
 script = ExtResource( 2 )
 _sections_unfolded = [ "Transform" ]
 cam = NodePath("Camera")
@@ -187,7 +189,7 @@ _sections_unfolded = [ "Transform" ]
 
 [node name="MeshInstance" type="MeshInstance" parent="." index="6"]
 
-transform = Transform( 1, 0, 0, 0, -1.62921e-07, -1, 0, 1, -1.62921e-07, 0, 0.787368, 0 )
+transform = Transform( 1, 0, 0, 0, -1.62921e-07, -1, 0, 1, -1.62921e-07, 0, 0.567933, 0 )
 layers = 1
 material_override = null
 cast_shadow = 1

scripts/player.gd

@@ -6,7 +6,7 @@ var view_sensitivity = 0.25
 
 # Walking speed and jumping height are defined later.
 var walk_speed = 0.8 # Actually acceleration; m/s/s
-var jump_speed = 1 # m/s
+var jump_speed = 1.5 # m/s
 var air_accel = .1 # m/s/s
 var floor_friction = 1-0.08
 var air_friction = 1-0.03
@@ -152,7 +152,7 @@ func control_player(state):
 	direction = direction.normalized()
 	var ray = get_node("Ray")
 
-	if ray.is_colliding():
+	if get_colliding_bodies(): # We can navigate normally, we have a surface
 		var up = state.get_total_gravity().normalized()
 		var normal = ray.get_collision_normal()
 		var floor_velocity = Vector3()
@@ -166,7 +166,16 @@ func control_player(state):
 		state.set_linear_velocity(lin_v)
 
 		if Input.is_action_pressed("jump"):
-			state.apply_impulse(Vector3(), normal * jump_speed * get_mass())
+			# This may be kinda expensive but we only check while pressing jump so it's ok
+			# Detect jumpable
+			var jump_dot = 0.8 # If normal.dot(up) > jump_dot, we can jump
+			var jumpable = false
+			for i in range(state.get_contact_count()):
+				var n = state.get_contact_local_normal(0)
+				if n.dot(Vector3(0,1,0)) > jump_dot:
+					jumpable = true
+			if jumpable:
+				state.apply_impulse(Vector3(), normal * jump_speed * get_mass())
 
 	else:
 		var accel = (1 + switch_charge * air_speed_build) * air_accel