X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fnasal%2Fmathlib.c;h=f2434b3cfe1dafe38cdfeba827716d8b91c1dc66;hb=e036dfc5bf691e2cb467f27010c3291f5b1c13a7;hp=639cce32cbc97a484248fe8f21fb60802489c787;hpb=7a680fb9f26af64738bddfca741dc48fd0be0bc3;p=simgear.git

diff --git a/simgear/nasal/mathlib.c b/simgear/nasal/mathlib.c
index 639cce32..f2434b3c 100644
--- a/simgear/nasal/mathlib.c
+++ b/simgear/nasal/mathlib.c
@@ -65,6 +65,16 @@ static naRef f_sqrt(naContext c, naRef me, int argc, naRef* args)
     return VALIDATE(a);
 }
 
+static naRef f_pow(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    naRef b = naNumValue(argc > 1 ? args[1] : naNil());
+    if(naIsNil(a) || naIsNil(b))
+        naRuntimeError(c, "non numeric argument to pow()");
+    a.num = pow(a.num, b.num);
+    return VALIDATE(a);
+}
+
 static naRef f_atan2(naContext c, naRef me, int argc, naRef* args)
 {
     naRef a = naNumValue(argc > 0 ? args[0] : naNil());
@@ -75,16 +85,146 @@ static naRef f_atan2(naContext c, naRef me, int argc, naRef* args)
     return VALIDATE(a);
 }
 
+static naRef f_floor(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    if(naIsNil(a))
+        naRuntimeError(c, "non numeric argument to floor()");
+    a.num = floor(a.num);
+    return VALIDATE(a);
+}
+
+static naRef f_ceil(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    if(naIsNil(a))
+        naRuntimeError(c, "non numeric argument to ceil()");
+    a.num = ceil(a.num);
+    return VALIDATE(a);
+}
+
+static naRef f_fmod(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    naRef b = naNumValue(argc > 1 ? args[1] : naNil());
+    if(naIsNil(a) || naIsNil(b))
+        naRuntimeError(c, "non numeric arguments to fmod()");
+    
+    a.num = fmod(a.num, b.num);
+    return VALIDATE(a);
+}
+
+static naRef f_clamp(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    naRef b = naNumValue(argc > 1 ? args[1] : naNil());
+    naRef x = naNumValue(argc > 2 ? args[2] : naNil());
+    
+    if(naIsNil(a) || naIsNil(b) || naIsNil(x))
+        naRuntimeError(c, "non numeric arguments to clamp()");
+    
+    if (a.num < b.num) b.num = a.num;
+    if (b.num > x.num) b.num = x.num;
+    return VALIDATE(b);
+}
+
+static naRef f_periodic(naContext c, naRef me, int argc, naRef* args)
+{
+    double range;
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    naRef b = naNumValue(argc > 1 ? args[1] : naNil());
+    naRef x = naNumValue(argc > 2 ? args[2] : naNil());
+    
+    if(naIsNil(a) || naIsNil(b) || naIsNil(x))
+        naRuntimeError(c, "non numeric arguments to periodic()");
+  
+    range = b.num - a.num;
+    x.num = x.num - range*floor((x.num - a.num)/range);
+    // two security checks that can only happen due to roundoff
+    if (x.num <= a.num)
+        x.num = a.num;
+    if (b.num <= x.num)
+        x.num = b.num;
+    return VALIDATE(x);
+      
+//    x.num = SGMiscd::normalizePeriodic(a, b, x);
+    return VALIDATE(x);
+}
+
+static naRef f_round(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    naRef b = naNumValue(argc > 1 ? args[1] : naNil());
+#ifdef _MSC_VER
+    double x,y;
+#endif    
+    if(naIsNil(a))
+        naRuntimeError(c, "non numeric arguments to round()");
+    if (naIsNil(b))
+        b.num = 1.0;
+
+#ifdef _MSC_VER // MSVC is not C99-compatible, no round() in math.h
+    y = a.num / b.num;
+    x = floor(y + 0.5);
+#else
+    double x = round(a.num / b.num);
+#endif
+    a.num = x * b.num;
+    
+    return VALIDATE(a);
+}
+
+
+static naRef f_tan(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());    
+    if(naIsNil(a))
+        naRuntimeError(c, "non numeric arguments to tan()");
+    
+   a.num = tan(a.num);
+   return VALIDATE(a);
+}
+
+static naRef f_asin(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    if(naIsNil(a))
+        naRuntimeError(c, "non numeric argument to asin()");
+    a.num = asin(a.num);
+    return VALIDATE(a);
+}
+
+static naRef f_acos(naContext c, naRef me, int argc, naRef* args)
+{
+    naRef a = naNumValue(argc > 0 ? args[0] : naNil());
+    if(naIsNil(a))
+        naRuntimeError(c, "non numeric argument to acos()");
+    a.num = acos(a.num);
+    return VALIDATE(a);
+}
+
 static naCFuncItem funcs[] = {
     { "sin", f_sin },
     { "cos", f_cos },
     { "exp", f_exp },
     { "ln", f_ln },
+    { "pow", f_pow },
     { "sqrt", f_sqrt },
     { "atan2", f_atan2 },
+    { "floor", f_floor },
+    { "ceil", f_ceil },
+    { "fmod", f_fmod },
+    { "clamp", f_clamp },
+    { "periodic", f_periodic },    
+    { "round", f_round }, 
+    { "tan", f_tan },   
+    { "acos", f_acos },
+    { "asin", f_asin },   
     { 0 }
 };
 
+
+
 naRef naInit_math(naContext c)
 {
     naRef ns = naGenLib(c, funcs);