john/prosperon
1
0
Fork 0
Code Issues Pull requests Actions Releases Activity

add optional pivot for vector.rotate

Browse source
This commit is contained in:
John Alanbrook 2024-08-29 10:20:22 -05:00
parent bc313d6f8c
commit dc25e23aa8
1 changed files with 4 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
source/engine/jsffi.c
View file

@ -1289,12 +1289,14 @@ JSC_CCALL(vector_inflate,
JSC_CCALL(vector_rotate, JSC_CCALL(vector_rotate,
HMM_Vec2 vec = js2vec2(argv[0]); HMM_Vec2 vec = js2vec2(argv[0]);
float r = HMM_LenV2(vec);
double angle = js2angle(argv[1]); double angle = js2angle(argv[1]);
HMM_Vec2 pivot = JS_IsUndefined(argv[2]) ? v2zero : js2vec2(argv[2]);
vec = HMM_SubV2(vec,pivot);
float r = HMM_LenV2(vec);
angle += atan2(vec.y,vec.x); angle += atan2(vec.y,vec.x);
vec.x = r*cos(angle); vec.x = r*cos(angle);
vec.y = r*sin(angle); vec.y = r*sin(angle);
return vec22js(vec); return vec22js(HMM_AddV2(vec,pivot));
) )
JSC_CCALL(vector_add, JSC_CCALL(vector_add,