Add CH dependencies temporarily.cesky-hvozd

Before merge to master should remove them again and split out util functions (e.g. formspec lib)

1 files changed, 49 insertions, 0 deletions

diff --git a/ch_core/markers.lua b/ch_core/markers.lua
new file mode 100644
index 0000000..4f8d34e
--- /dev/null
+++ b/ch_core/markers.lua
@@ -0,0 +1,49 @@
+ch_core.open_submod("markers", {})
+
+local texture = "ch_core_chessboard.png^[makealpha:255,255,255^[opacity:240"
+
+local function remove_object(self)
+	self.object:remove()
+end
+local function remove_object_after(self, delay)
+	if delay > 0 then
+		minetest.after(delay, remove_object, self)
+	else
+		remove_object(self)
+	end
+end
+local function remove_object_after_timeout(self, shift)
+	remove_object_after(self, (self.timeout or shift) - shift)
+end
+local function on_activate(self, staticdata, dtime_s)
+	minetest.after(1, remove_object_after_timeout, self, 1)
+end
+
+local def = {
+	initial_properties = {
+		physical = false,
+		pointable = false,
+		visual = "cube",
+		textures = {texture, texture, texture, texture, texture, texture},
+		use_texture_alpha = true,
+		backface_culling = false,
+		static_save = false,
+		shaded = false,
+	},
+	on_activate = on_activate,
+}
+minetest.register_entity("ch_core:markers", def)
+
+function ch_core.show_aabb(coords, timeout)
+	local size = vector.new(coords[4] - coords[1], coords[5] - coords[2], coords[6] - coords[3])
+	local center = vector.new(
+		0.5 * (coords[4] + coords[1]) - 0.5,
+		0.5 * (coords[5] + coords[2]) - 0.5,
+		0.5 * (coords[6] + coords[3]) - 0.5)
+	local obj = minetest.add_entity(center, "ch_core:markers")
+	obj:set_properties{visual_size = size}
+	obj:get_luaentity().timeout = timeout or 16
+	return obj
+end
+
+ch_core.close_submod("markers")