Implement 'acos' builtin.

This is tacked on to the end of the 'asin' file because acos calls asin,
whech means asin needs to be defined first.  Alphabetical order fail.

1 files changed, 23 insertions, 0 deletions

diff --git a/builtin_function.cpp b/builtin_function.cpp
index 754a721c7e..083fd314c7 100644
--- a/builtin_function.cpp
+++ b/builtin_function.cpp
@@ -196,6 +196,29 @@ static const char *builtins_110_asin = {
    "     	          (expression vec4 *\n"
    "     	           (constant float (0.0742610))\n"
    "	           (expression vec4 abs (var_ref x))))))))))\n"
+   ")\n"
+   "\n"
+   " (function acos\n"
+   "   (signature float\n"
+   "     (parameters\n"
+   "       (declare (in) float x))\n"
+   "     ((return (expression float - (constant float (1.5707963))\n"
+   "                                  (call asin ((var_ref x)))))))\n"
+   "   (signature vec2\n"
+   "     (parameters\n"
+   "       (declare (in) vec2 x))\n"
+   "     ((return (expression vec2 - (constant float (1.5707963))\n"
+   "                                 (call asin ((var_ref x)))))))\n"
+   "   (signature vec3\n"
+   "     (parameters\n"
+   "       (declare (in) vec3 x))\n"
+   "     ((return (expression vec3 - (constant float (1.5707963))\n"
+   "                                 (call asin ((var_ref x)))))))\n"
+   "   (signature vec4\n"
+   "     (parameters\n"
+   "       (declare (in) vec4 x))\n"
+   "     ((return (expression vec4 - (constant float (1.5707963))\n"
+   "                                 (call asin ((var_ref x)))))))\n"
    "))\n"
 };