Implement "tan" builtin.

diff --git a/builtins/110/tan b/builtins/110/tan
new file mode 100644 (file)
index 0000000..3e04892
--- /dev/null
+++ b/builtins/110/tan
@@ -0,0 +1,21 @@
+((function tan
+   (signature float
+     (parameters
+       (declare (in) float angle))
+     ((return (expression float / (expression float sin (var_ref angle)) (expression float cos (var_ref angle))))))
+
+   (signature vec2
+     (parameters
+       (declare (in) vec2 angle))
+     ((return (expression float / (expression float sin (var_ref angle)) (expression vec2 cos (var_ref angle))))))
+
+   (signature vec3
+     (parameters
+       (declare (in) vec3 angle))
+     ((return (expression float / (expression float sin (var_ref angle)) (expression vec3 cos (var_ref angle))))))
+
+   (signature vec4
+     (parameters
+       (declare (in) vec4 angle))
+     ((return (expression float / (expression float sin (var_ref angle)) (expression vec4 cos (var_ref angle))))))
+))