extends Spatial

func _ready():
	draw_world()

func draw_world():
	# for i in range(0, 1, 1):
	# 	print(i)
	var st = SurfaceTool.new()

	st.begin(Mesh.PRIMITIVE_TRIANGLES)
	# st.add_smooth_group(true)
	for triangle in Global.terrain.get_triangles():
		if not triangle.is_water():
			if triangle.get_elevation() < 0:
				print(triangle.get_elevation())
			var factor = Vector3(1, 120, 1)
			for edge in triangle.edges():
				if triangle.get_elevation() > edge.opposite_triangle().get_elevation():
					st.add_vertex(Vector3(edge.start().point3d().x, triangle.get_elevation(), edge.start().point3d().z) * factor)
					st.add_vertex(Vector3(edge.end().point3d().x, triangle.get_elevation(), edge.end().point3d().z) * factor)
					st.add_vertex(Vector3(edge.start().point3d().x, edge.opposite_triangle().get_elevation(), edge.start().point3d().z) * factor)
					
					st.add_vertex(Vector3(edge.end().point3d().x, triangle.get_elevation(), edge.end().point3d().z) * factor)
					st.add_vertex(Vector3(edge.end().point3d().x, edge.opposite_triangle().get_elevation(), edge.end().point3d().z) * factor)
					st.add_vertex(Vector3(edge.start().point3d().x, edge.opposite_triangle().get_elevation(), edge.start().point3d().z) * factor)
						
			for point in triangle.points():
				st.add_vertex(Vector3(point.point3d().x, triangle.get_elevation(), point.point3d().z) * factor)

	st.generate_normals()
#	st.generate_tangents()
	st.index()
	# Commit to a mesh.
	var mesh = st.commit()
	
	var mi = MeshInstance.new()
	mi.mesh = mesh
	var material = load("res://world/world.material")
	mi.set_surface_material(0, material)
	mi.create_trimesh_collision()
	mi.cast_shadow = GeometryInstance.SHADOW_CASTING_SETTING_ON
	print(mi)
	add_child(mi)