From 1184f125ad967cdd97ba8956854cf38b80ec0805 Mon Sep 17 00:00:00 2001
From: whosit <knbdevel@gmail.com>
Date: Sun, 23 May 2021 01:18:24 +0300
Subject: [PATCH] use texture rotation to increase angular res and use less
 textures

---
 init.lua                 |  14 ++++++++++----
 make_compass_textures.sh |   4 ++--
 textures/arrow_000.png   | Bin 1005 -> 1005 bytes
 textures/arrow_010.png   | Bin 0 -> 1633 bytes
 textures/arrow_020.png   | Bin 0 -> 1648 bytes
 textures/arrow_030.png   | Bin 0 -> 1512 bytes
 textures/arrow_040.png   | Bin 0 -> 1635 bytes
 textures/arrow_045.png   | Bin 1418 -> 0 bytes
 textures/arrow_050.png   | Bin 0 -> 1648 bytes
 textures/arrow_060.png   | Bin 0 -> 1493 bytes
 textures/arrow_070.png   | Bin 0 -> 1610 bytes
 textures/arrow_080.png   | Bin 0 -> 1616 bytes
 textures/arrow_090.png   | Bin 907 -> 0 bytes
 textures/arrow_135.png   | Bin 1419 -> 0 bytes
 textures/arrow_180.png   | Bin 1026 -> 0 bytes
 textures/arrow_225.png   | Bin 1411 -> 0 bytes
 textures/arrow_270.png   | Bin 922 -> 0 bytes
 textures/arrow_315.png   | Bin 1412 -> 0 bytes
 18 files changed, 12 insertions(+), 6 deletions(-)
 create mode 100644 textures/arrow_010.png
 create mode 100644 textures/arrow_020.png
 create mode 100644 textures/arrow_030.png
 create mode 100644 textures/arrow_040.png
 delete mode 100644 textures/arrow_045.png
 create mode 100644 textures/arrow_050.png
 create mode 100644 textures/arrow_060.png
 create mode 100644 textures/arrow_070.png
 create mode 100644 textures/arrow_080.png
 delete mode 100644 textures/arrow_090.png
 delete mode 100644 textures/arrow_135.png
 delete mode 100644 textures/arrow_180.png
 delete mode 100644 textures/arrow_225.png
 delete mode 100644 textures/arrow_270.png
 delete mode 100644 textures/arrow_315.png

diff --git a/init.lua b/init.lua
index 8af3aad..4566821 100644
--- a/init.lua
+++ b/init.lua
@@ -87,22 +87,28 @@ local function show_hud_waypoint(player, point_pos, name, icon_name)
     local size_x = 9
     local size_y = 16
 
-    local angle_steps = 8 -- number pre-rotated textures
+    local angle_steps = 9 -- number pre-rotated textures
 
     -- vector pointing towards point_pos
     local v = vector.subtract(point_pos, player:get_pos())
     -- angle relative to player position
     local angle = math.atan2(v.x, v.z)
     -- snap/round to increments and convert to degrees
-    local angle_snap = round(angle/(2*math.pi) * angle_steps) * (360 / angle_steps) % 360
+    local angle_quad = math.floor(angle/(2*math.pi) * 4) * (360 / 4) % 360
+    local angle_quad_map = {[0] = "I", [90] = "R270", [180] = "R180", [270] = "R90"}
+    local angle_snap = round(angle/(2*math.pi) * angle_steps * 4) * (360 / (angle_steps * 4)) % 360
+    local angle_quad_step = (angle_snap - angle_quad) % 90
     
-    local arrow_texture = ("arrow_%03d.png"):format(angle_snap)
+    local arrow_texture = ("arrow_%03d.png"):format(angle_quad_step)
+
+    -- TODO it's possible to color the texture: use it to make waypoints have different colors
+    --local arrow_texture = arrow_texture .. "^[multiply:#11FFFF"
 
     local hud_id3 = player:hud_add({
             hud_elem_type = "compass",
             size = {x=-size_x,y=-size_y},
             --scale = {x=0.5,y=0.5}, -- unused
-            text = arrow_texture,
+            text = arrow_texture .. "^[transform" .. angle_quad_map[angle_quad],
             --alignment = {x=1,y=1}, -- top-left?
             alignment = {x=100/size_x,y=100/size_y*0.7}, -- above cursor
             --offset = {x=0,y=0}, -- in pixels?
diff --git a/make_compass_textures.sh b/make_compass_textures.sh
index 63bc904..e9c2d32 100644
--- a/make_compass_textures.sh
+++ b/make_compass_textures.sh
@@ -1,9 +1,9 @@
 input="compass_arrow.svg"
 size=64
-angles=8
+angles=9
 for rot in `seq 0 $((angles - 1))`; do
     #inkscape -w ${size} -h ${size} compass_arrow.svg -o "$out"
-    angle=$((360 / angles * rot))
+    angle=$((90 / angles * rot))
     out="textures/arrow_"$(printf "%03d" $angle)".png"
     convert -density 384 -background none -distort SRT $angle -gravity center -resize ${size}x${size} "$input" "$out"
 done
diff --git a/textures/arrow_000.png b/textures/arrow_000.png
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