lot of work on 2D lighting and isometric maps

added a new demo, isometric_light that does full isometric sorting,
lights, shadows, etc.

LICENSE.md

@@ -21,3 +21,7 @@
  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     
  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                
+
+
+**********************************************************************
+

demos/2d/isometric_light/cubio.gd

@@ -0,0 +1,96 @@
+
+extends KinematicBody2D
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+const MAX_SPEED = 300.0
+const IDLE_SPEED = 10.0
+const ACCEL=5.0
+const VSCALE=0.5
+const SHOOT_INTERVAL=0.3
+
+var speed=Vector2()
+var current_anim=""
+var current_mirror=false
+
+var shoot_countdown=0
+
+func _input(ev):
+	if (ev.type==InputEvent.MOUSE_BUTTON and ev.button_index==1 and ev.pressed and shoot_countdown<=0):
+		var pos = get_canvas_transform().affine_inverse() * ev.pos
+		var dir = (pos-get_global_pos()).normalized()
+		var bullet = preload("res://shoot.scn").instance()
+		bullet.advance_dir=dir
+		bullet.set_pos( get_global_pos() + dir * 60 )
+		get_parent().add_child(bullet)
+		shoot_countdown=SHOOT_INTERVAL
+		
+		
+		
+
+func _fixed_process(delta):
+	
+	shoot_countdown-=delta
+	var dir = Vector2()
+	if (Input.is_action_pressed("up")):
+		dir+=Vector2(0,-1)
+	if (Input.is_action_pressed("down")):
+		dir+=Vector2(0,1)
+	if (Input.is_action_pressed("left")):
+		dir+=Vector2(-1,0)
+	if (Input.is_action_pressed("right")):
+		dir+=Vector2(1,0)
+		
+	if (dir!=Vector2()):
+		dir=dir.normalized()
+	speed = speed.linear_interpolate(dir*MAX_SPEED,delta*ACCEL)
+	var motion = speed * delta
+	motion.y*=VSCALE
+	motion=move(motion)
+	
+	if (is_colliding()):
+		var n = get_collision_normal()
+		motion=n.slide(motion)
+		move(motion)
+
+	var next_anim=""
+	var next_mirror=false
+	
+	if (dir==Vector2() and speed.length()<IDLE_SPEED):
+		next_anim="idle"
+		next_mirror=false
+	elif (speed.length()>IDLE_SPEED*0.1):
+		var angle = atan2(abs(speed.x),speed.y)	
+		
+		next_mirror = speed.x>0
+		if (angle<PI/8):
+			next_anim="bottom"
+			next_mirror=false
+		elif (angle<PI/4+PI/8):
+			next_anim="bottom_left"
+		elif (angle<PI*2/4+PI/8):
+			next_anim="left"
+		elif (angle<PI*3/4+PI/8):
+			next_anim="top_left"
+		else:
+			next_anim="top"
+			next_mirror=false
+		
+			
+	if (next_anim!=current_anim or next_mirror!=current_mirror):
+		get_node("frames").set_flip_h(next_mirror)
+		get_node("anim").play(next_anim)
+		current_anim=next_anim
+		current_mirror=next_mirror
+		
+
+
+func _ready():
+	# Initialization here
+	set_fixed_process(true)
+	set_process_input(true)
+	pass
+
+