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AP_Scripting: special case handling of copy method

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allow for each copy() of Location, Vector2f and Vector3f without
adding special methods to each type in C++
This commit is contained in:
Andrew Tridgell 2022-01-09 11:14:13 +11:00
parent 3273ead11b
commit d56840e4ef
3 changed files with 38 additions and 1 deletions
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27
libraries/AP_Scripting/examples/copy_userdata.lua Normal file
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@ -0,0 +1,27 @@
--[[
An example of using the copy() method on userdata
--]]
local loc1 = Location()
loc1:lat(-35)
loc1:lng(-122)
-- if we did this as loc2 = loc1 then it actually takes a reference
-- by using copy() we get the intended behaviour
local loc2 = loc1:copy()
loc2:offset(3000,5000)
local diff = loc1:get_distance_NE(loc2)
gcs:send_text(0,string.format("locdiff=(%.2f,%.2f)", diff:x(), diff:y()))
local v1 = Vector2f()
v1:x(-35)
v1:y(-122)
local v2 = v1:copy()
v2:x(v2:x()+100)
v2:y(v2:y()+300)
local diff = v2 - v1
gcs:send_text(0,string.format("vdiff=(%.2f,%.2f)", diff:x(), diff:y()))

5
libraries/AP_Scripting/generator/description/bindings.desc
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@ -18,6 +18,8 @@ userdata Location method get_bearing float Location
userdata Location method get_distance_NED Vector3f Location
userdata Location method get_distance_NE Vector2f Location
userdata Location method change_alt_frame boolean Location::AltFrame'enum Location::AltFrame::ABSOLUTE Location::AltFrame::ABOVE_TERRAIN
userdata Location method copy Location
include AP_AHRS/AP_AHRS.h
@ -119,6 +121,7 @@ userdata Vector3f operator -
userdata Vector3f method dot float Vector3f
userdata Vector3f method cross Vector3f Vector3f
userdata Vector3f method scale Vector3f float'skip_check
userdata Vector3f method copy Vector3f
userdata Vector2f field x float'skip_check read write
userdata Vector2f field y float'skip_check read write
@ -130,6 +133,8 @@ userdata Vector2f method is_zero boolean
userdata Vector2f method rotate void float'skip_check
userdata Vector2f operator +
userdata Vector2f operator -
userdata Vector2f method copy Vector2f
include AP_Notify/AP_Notify.h
singleton AP_Notify alias notify

5
libraries/AP_Scripting/generator/src/main.c
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@ -1692,7 +1692,12 @@ void emit_userdata_method(const struct userdata *data, const struct method *meth
static_cast = FALSE;
break;
case TYPE_USERDATA:
if (strcmp(method->name, "copy") == 0) {
// special case for copy method
fprintf(source, " const %s data = (*%s", method->return_type.data.ud.name, ud_name);
} else {
fprintf(source, " const %s &data = %s%s%s(", method->return_type.data.ud.name, ud_name, ud_access, method->name);
}
static_cast = FALSE;
break;
case TYPE_AP_OBJECT: