link m_olib

config/rel_slices.yml

@@ -12,6 +12,9 @@ m_room_type/mRmTp_FtrItemNo2FtrIdx.c:
 #   .rodata: [0x80643310, 0x80643318]
 sys_stacks.c:
     .bss: [0x812F5670, 0x812F9670]
+m_olib.c:
+    .text: [0x803D88E8, 0x803D8A34]
+    .rodata: [0x80642A00, 0x80642A10]
 THA_GA.c:
     .text: [0x80404AE0, 0x80404B40]
 TwoHeadArena.c:

include/libc/math.h

@@ -5,6 +5,8 @@
 
 #define SQRT_OF_2_F 1.41421356237309504880f
 
+#define M_PI 3.14159265358979323846f
+
 s16 sins(u16);
 
 f32 fatan2(f32, f32);

include/libu64/u64types.h

@@ -3,10 +3,6 @@
 
 #include "types.h"
 
-typedef struct xyz_s {
-  f32 x, y, z;
-} xyz_t;
-
 typedef struct {
   u32 r:8;
   u32 g:8;

include/m_olib.h

@@ -3,10 +3,20 @@
 
 #include "types.h"
 #include "libu64/u64types.h"
+#include "m_lib.h"
+#include "libc/math.h"
+
+//gotta put these somewhere else
+#define TRUNCF_BINANG(f) (s16)(s32)(f)
+#define CAM_DEG_TO_BINANG(degrees) (s16)TRUNCF_BINANG((degrees) * 182.04167f + .5f)
+#define RAD_TO_DEG(radians) ((radians) * (180.0f / M_PI))
 
 typedef struct rect_s {
   int top, bottom;
   int l, r;
 } rect;
 
+void radianxy_by_2pos(xyz_t* dest, xyz_t* sub, xyz_t* min);
+s_xyz sanglexy_by_2pos(xyz_t* sub, xyz_t* min); 
+
 #endif

rel/m_olib.c

@@ -0,0 +1,27 @@
+#include "m_olib.h"
+void radianxy_by_2pos(xyz_t* dest, xyz_t* sub, xyz_t* min){
+
+    xyz_t ret;
+
+    ret.x = fatan2(min->z - sub->z, min->y - sub->y);
+    ret.y = fatan2(min->x - sub->x, min->z - sub->z);
+    ret.z = 0.0f;
+
+    *dest = ret;
+}
+
+s_xyz sanglexy_by_2pos(xyz_t* sub, xyz_t* min) {
+    
+    s_xyz sangle;
+    xyz_t conv;
+    xyz_t angle;
+    
+    radianxy_by_2pos(&angle, sub,min);
+    conv = angle;
+    sangle.x = CAM_DEG_TO_BINANG(RAD_TO_DEG(conv.x));
+    sangle.y = CAM_DEG_TO_BINANG(RAD_TO_DEG(conv.y));
+    sangle.z = 0;
+    
+
+   return sangle;
+}