Tubo! (d_a_obj_tubo) (#95)

* begin work

* fixup modifications to d_a_base header

* progress

* update from main again (forgor to fetch)

* progress

* Basically done

* clean up some inlines

* some at/tg hit typing and tubo naming

* more naming

include/c/c_lib.h

@@ -7,6 +7,7 @@
 namespace cLib {
 
 s32 targetAngleY(const mVec3_c &target, const mVec3_c &source);
+f32 addCalcPosXZ(mVec3_c *src, const mVec3_c &target, f32 scale, f32 maxStep, f32 minStep);
 
 } // namespace cLib
 

include/c/c_math.h

@@ -2,6 +2,9 @@
 #define C_LIB_CMATH
 
 #include "common.h"
+#include "egg/math/eggMath.h"
+
+#include <cmath.h>
 
 namespace cM {
 s16 atan2s(f32, f32);
@@ -24,6 +27,16 @@ inline T minMaxLimit(T val, T min, T max) {
     return (T)((T)val < (T)min ? (T)min : ((T)val > (T)max ? (T)max : (T)val));
 }
 
+inline bool isZero(f32 val) {
+    return std::fabsf(val) <= EGG::Math<f32>::epsilon();
+}
+
+// When possivle, use the `isZero` func above.
+// There are small cases where the result of fabs needs to be used again
+inline bool isLessThanZero(f32 val) {
+    return val <= EGG::Math<f32>::epsilon();
+}
+
 } // namespace cM
 
 #endif