diff options
| author | Kenneth Graunke <kenneth@whitecape.org> | 2010-06-09 14:30:52 -0700 |
|---|---|---|
| committer | Kenneth Graunke <kenneth@whitecape.org> | 2010-06-09 14:44:39 -0700 |
| commit | cbd881da3fd2a68272988cf7fd21dfe006d47c8c (patch) | |
| tree | 382b76515798729f3e1a057146a06501fbc751d4 /builtins/110/refract | |
| parent | 3ffedf12496d17d0bcfab847293053222e996ff8 (diff) | |
Implement 'refract' builtin.
Diffstat (limited to 'builtins/110/refract')
| -rw-r--r-- | builtins/110/refract | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/builtins/110/refract b/builtins/110/refract new file mode 100644 index 0000000000..e9b1475294 --- /dev/null +++ b/builtins/110/refract @@ -0,0 +1,102 @@ +((function refract + (signature float + (parameters + (declare (in) float i) + (declare (in) float n) + (declare (in) float eta)) + ((declare () float k) + (assign (constant bool (1)) (var_ref k) + (expression float - (constant float (1.0)) + (expression float * (var_ref eta) + (expression float * (var_ref eta) + (expression float - (constant float (1.0)) + (expression float * + (expression float dot (var_ref n) (var_ref i)) + (expression float dot (var_ref n) (var_ref i)))))))) + (if (expression bool < (var_ref k) (constant float (0.0))) + ((return (constant float (0.0)))) + ((return (expression float - + (expression float * (var_ref eta) (var_ref i)) + (expression float * + (expression float + + (expression float * (var_ref eta) + (expression float dot (var_ref n) (var_ref i))) + (expression float sqrt (var_ref k))) + (var_ref n)))))))) + + (signature vec2 + (parameters + (declare (in) vec2 i) + (declare (in) vec2 n) + (declare (in) float eta)) + ((declare () float k) + (assign (constant bool (1)) (var_ref k) + (expression float - (constant float (1.0)) + (expression float * (var_ref eta) + (expression float * (var_ref eta) + (expression float - (constant float (1.0)) + (expression float * + (expression float dot (var_ref n) (var_ref i)) + (expression float dot (var_ref n) (var_ref i)))))))) + (if (expression bool < (var_ref k) (constant float (0.0))) + ((return (constant vec2 (0.0 0.0)))) + ((return (expression vec2 - + (expression vec2 * (var_ref eta) (var_ref i)) + (expression vec2 * + (expression float + + (expression float * (var_ref eta) + (expression float dot (var_ref n) (var_ref i))) + (expression float sqrt (var_ref k))) + (var_ref n)))))))) + + (signature vec3 + (parameters + (declare (in) vec3 i) + (declare (in) vec3 n) + (declare (in) float eta)) + ((declare () float k) + (assign (constant bool (1)) (var_ref k) + (expression float - (constant float (1.0)) + (expression float * (var_ref eta) + (expression float * (var_ref eta) + (expression float - (constant float (1.0)) + (expression float * + (expression float dot (var_ref n) (var_ref i)) + (expression float dot (var_ref n) (var_ref i)))))))) + (if (expression bool < (var_ref k) (constant float (0.0))) + ((return (constant vec3 (0.0 0.0)))) + ((return (expression vec3 - + (expression vec3 * (var_ref eta) (var_ref i)) + (expression vec3 * + (expression float + + (expression float * (var_ref eta) + (expression float dot (var_ref n) (var_ref i))) + (expression float sqrt (var_ref k))) + (var_ref n)))))))) + + (signature vec4 + (parameters + (declare (in) vec4 i) + (declare (in) vec4 n) + (declare (in) float eta)) + ((declare () float k) + (assign (constant bool (1)) (var_ref k) + (expression float - (constant float (1.0)) + (expression float * (var_ref eta) + (expression float * (var_ref eta) + (expression float - (constant float (1.0)) + (expression float * + (expression float dot (var_ref n) (var_ref i)) + (expression float dot (var_ref n) (var_ref i)))))))) + (if (expression bool < (var_ref k) (constant float (0.0))) + ((return (constant vec4 (0.0 0.0)))) + ((return (expression vec4 - + (expression vec4 * (var_ref eta) (var_ref i)) + (expression vec4 * + (expression float + + (expression float * (var_ref eta) + (expression float dot (var_ref n) (var_ref i))) + (expression float sqrt (var_ref k))) + (var_ref n)))))))) + +)) |