diff options
Diffstat (limited to 'advtrains/helpers.lua')
| -rw-r--r-- | advtrains/helpers.lua | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/advtrains/helpers.lua b/advtrains/helpers.lua index 5f5521f..5dbfd8d 100644 --- a/advtrains/helpers.lua +++ b/advtrains/helpers.lua @@ -28,9 +28,12 @@ function advtrains.dirCoordSet(coord, dir) end
return {x=coord.x+x, y=coord.y, z=coord.z+z}
end
+advtrains.pos_add_dir = advtrains.dirCoordSet
+
function advtrains.dirToCoord(dir)
return advtrains.dirCoordSet({x=0, y=0, z=0}, dir)
end
+advtrains.dir_to_vector = advtrains.dirToCoord
function advtrains.maxN(list, expectstart)
local n=expectstart or 0
@@ -51,6 +54,8 @@ end function atround(number)
return math.floor(number+0.5)
end
+atfloor = math.floor
+
function advtrains.round_vector_floor_y(vec)
return {x=math.floor(vec.x+0.5), y=math.floor(vec.y), z=math.floor(vec.z+0.5)}
@@ -60,8 +65,8 @@ function advtrains.yawToDirection(yaw, conn1, conn2) if not conn1 or not conn2 then
error("given nil to yawToDirection: conn1="..(conn1 or "nil").." conn2="..(conn1 or "nil"))
end
- local yaw1=math.pi*(conn1/8)
- local yaw2=math.pi*(conn2/8)
+ local yaw1 = advtrains.dir_to_angle(conn1)
+ local yaw2 = advtrains.dir_to_angle(conn2)
local adiff1 = advtrains.minAngleDiffRad(yaw, yaw1)
local adiff2 = advtrains.minAngleDiffRad(yaw, yaw2)
@@ -75,8 +80,7 @@ end function advtrains.yawToAnyDir(yaw)
local min_conn, min_diff=0, 10
for conn, vec in pairs(advtrains.dir_trans_tbl) do
- local uvec = vector.normalize(advtrains.dirToCoord(conn))
- local yaw1 = math.atan2(uvec.z, uvec.x)
+ local yaw1 = advtrains.dir_to_angle(conn)
local diff = advtrains.minAngleDiffRad(yaw, yaw1)
if diff < min_diff then
min_conn = conn
@@ -88,8 +92,7 @@ end function advtrains.yawToClosestConn(yaw, conns)
local min_connid, min_diff=1, 10
for connid, conn in ipairs(conns) do
- local uvec = vector.normalize(advtrains.dirToCoord(conn.c))
- local yaw1 = math.atan2(uvec.z, uvec.x)
+ local yaw1 = advtrains.dir_to_angle(conn.c)
local diff = advtrains.minAngleDiffRad(yaw, yaw1)
if diff < min_diff then
min_connid = connid
@@ -99,6 +102,11 @@ function advtrains.yawToClosestConn(yaw, conns) return min_connid
end
+function advtrains.dir_to_angle(dir)
+ local uvec = vector.normalize(advtrains.dirToCoord())
+ local yaw1 = math.atan2(uvec.z, -uvec.x)
+end
+
function advtrains.minAngleDiffRad(r1, r2)
local pi, pi2 = math.pi, 2*math.pi
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