DefineClass.FaceMovement = {
	__parents = { "ParticleBehavior" },
	-- empty, but still needed so the engine can create the proper behavior object
	EditorName = "Face: Movement",
	EditorSubmenu = "Orientation",
}

DefineClass.FacePoint = {
	__parents = { "ParticleBehavior" },
	properties = {
		{ id = "center", name = "Center", editor = "point", scale = guim },
	},
	center = point30,
	EditorName = "Face: Point",
	EditorSubmenu = "Orientation",
}

DefineClass.FaceTerrain = {
	__parents = { "ParticleBehavior" },
	-- empty, but still needed so the engine can create the proper behavior object
	EditorName = "Face: Terrain",
	EditorSubmenu = "Orientation",
}

DefineClass.FaceDirection = {
	__parents = { "ParticleBehavior" },
	properties = {
		{ id = "direction", name = "Direction", editor = "point", scale = guim },
	},
	direction = point(0, 0, guim),
	EditorName = "Face: Direction",
	EditorSubmenu = "Orientation",
}

DefineClass.FaceAlongConstDir = {
	__parents = { "ParticleBehavior" },
	properties = {
		{ id = "direction", name = "Face along direction", editor = "point", scale = guim },
	},
	direction = point(0, 0, guim),
	EditorName = "Face: Along Const Dir",
	EditorSubmenu = "Orientation",
}

DefineClass.FaceAlongMovement = {
	__parents = { "ParticleBehavior" },
	properties = {
		{ id = "rotate", name = "Use rotation", editor = "bool" },
	},
	rotate = false,
	EditorName = "Face: Along Movement",
	EditorSubmenu = "Orientation",
}

DefineClass.FaceSphere = {
	__parents = { "ParticleBehavior" },
	properties = {
		{ id = "min_phi", editor = "number", default = 900, slider = true, min = 0, max = 1800, scale = 10, },
		{ id = "max_phi", editor = "number", default = 900, slider = true, min = 0, max = 1800, scale = 10, },
		{ id = "min_theta", editor = "number", default = 0, slider = true, min = -1800, max = 3600, scale = 10, },
		{ id = "max_theta", editor = "number", default = 3600, slider = true, min = -1800, max = 3600, scale = 10, },
	},
	EditorName = "Face: Along Sphere Surface",
	EditorSubmenu = "Orientation",
}