Implement 'refract' builtin.
This commit is contained in:
Kenneth Graunke
@@ -1718,6 +1718,111 @@ static const char *builtins_110_reflect = {
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"))\n"
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};
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static const char *builtins_110_refract = {
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"((function refract\n"
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" (signature float\n"
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" (parameters\n"
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" (declare (in) float i)\n"
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" (declare (in) float n)\n"
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" (declare (in) float eta))\n"
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" ((declare () float k)\n"
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" (assign (constant bool (1)) (var_ref k)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * (var_ref eta)\n"
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" (expression float * (var_ref eta)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * \n"
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" (expression float dot (var_ref n) (var_ref i))\n"
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" (expression float dot (var_ref n) (var_ref i))))))))\n"
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" (if (expression bool < (var_ref k) (constant float (0.0)))\n"
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" ((return (constant float (0.0))))\n"
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" ((return (expression float -\n"
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" (expression float * (var_ref eta) (var_ref i))\n"
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" (expression float *\n"
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" (expression float +\n"
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" (expression float * (var_ref eta)\n"
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" (expression float dot (var_ref n) (var_ref i)))\n"
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" (expression float sqrt (var_ref k)))\n"
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" (var_ref n))))))))\n"
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"\n"
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" (signature vec2\n"
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" (parameters\n"
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" (declare (in) vec2 i)\n"
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" (declare (in) vec2 n)\n"
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" (declare (in) float eta))\n"
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" ((declare () float k)\n"
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" (assign (constant bool (1)) (var_ref k)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * (var_ref eta)\n"
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" (expression float * (var_ref eta)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * \n"
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" (expression float dot (var_ref n) (var_ref i))\n"
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" (expression float dot (var_ref n) (var_ref i))))))))\n"
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" (if (expression bool < (var_ref k) (constant float (0.0)))\n"
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" ((return (constant vec2 (0.0 0.0))))\n"
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" ((return (expression vec2 -\n"
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" (expression vec2 * (var_ref eta) (var_ref i))\n"
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" (expression vec2 *\n"
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" (expression float +\n"
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" (expression float * (var_ref eta)\n"
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" (expression float dot (var_ref n) (var_ref i)))\n"
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" (expression float sqrt (var_ref k)))\n"
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" (var_ref n))))))))\n"
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"\n"
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" (signature vec3\n"
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" (parameters\n"
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" (declare (in) vec3 i)\n"
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" (declare (in) vec3 n)\n"
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" (declare (in) float eta))\n"
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" ((declare () float k)\n"
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" (assign (constant bool (1)) (var_ref k)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * (var_ref eta)\n"
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" (expression float * (var_ref eta)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * \n"
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" (expression float dot (var_ref n) (var_ref i))\n"
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" (expression float dot (var_ref n) (var_ref i))))))))\n"
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" (if (expression bool < (var_ref k) (constant float (0.0)))\n"
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" ((return (constant vec3 (0.0 0.0))))\n"
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" ((return (expression vec3 -\n"
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" (expression vec3 * (var_ref eta) (var_ref i))\n"
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" (expression vec3 *\n"
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" (expression float +\n"
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" (expression float * (var_ref eta)\n"
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" (expression float dot (var_ref n) (var_ref i)))\n"
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" (expression float sqrt (var_ref k)))\n"
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" (var_ref n))))))))\n"
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"\n"
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" (signature vec4\n"
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" (parameters\n"
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" (declare (in) vec4 i)\n"
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" (declare (in) vec4 n)\n"
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" (declare (in) float eta))\n"
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" ((declare () float k)\n"
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" (assign (constant bool (1)) (var_ref k)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * (var_ref eta)\n"
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" (expression float * (var_ref eta)\n"
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" (expression float - (constant float (1.0))\n"
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" (expression float * \n"
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" (expression float dot (var_ref n) (var_ref i))\n"
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" (expression float dot (var_ref n) (var_ref i))))))))\n"
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" (if (expression bool < (var_ref k) (constant float (0.0)))\n"
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" ((return (constant vec4 (0.0 0.0))))\n"
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" ((return (expression vec4 -\n"
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" (expression vec4 * (var_ref eta) (var_ref i))\n"
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" (expression vec4 *\n"
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" (expression float +\n"
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" (expression float * (var_ref eta)\n"
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" (expression float dot (var_ref n) (var_ref i)))\n"
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" (expression float sqrt (var_ref k)))\n"
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" (var_ref n))))))))\n"
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"\n"
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"))\n"
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};
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static const char *builtins_110_sign = {
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"((function sign\n"
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" (signature float\n"
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@@ -2379,6 +2484,7 @@ static const char *functions_for_110 [] = {
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builtins_110_pow,
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builtins_110_radians,
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builtins_110_reflect,
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builtins_110_refract,
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builtins_110_sign,
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builtins_110_sin,
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builtins_110_smoothstep,
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102
builtins/110/refract
Normal file
102
builtins/110/refract
Normal file
@@ -0,0 +1,102 @@
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((function refract
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(signature float
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(parameters
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(declare (in) float i)
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(declare (in) float n)
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(declare (in) float eta))
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((declare () float k)
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(assign (constant bool (1)) (var_ref k)
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(expression float - (constant float (1.0))
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(expression float * (var_ref eta)
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(expression float * (var_ref eta)
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(expression float - (constant float (1.0))
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(expression float *
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(expression float dot (var_ref n) (var_ref i))
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(expression float dot (var_ref n) (var_ref i))))))))
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(if (expression bool < (var_ref k) (constant float (0.0)))
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((return (constant float (0.0))))
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((return (expression float -
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(expression float * (var_ref eta) (var_ref i))
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(expression float *
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(expression float +
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(expression float * (var_ref eta)
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(expression float dot (var_ref n) (var_ref i)))
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(expression float sqrt (var_ref k)))
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(var_ref n))))))))
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(signature vec2
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(parameters
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(declare (in) vec2 i)
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(declare (in) vec2 n)
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(declare (in) float eta))
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((declare () float k)
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(assign (constant bool (1)) (var_ref k)
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(expression float - (constant float (1.0))
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(expression float * (var_ref eta)
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(expression float * (var_ref eta)
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(expression float - (constant float (1.0))
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(expression float *
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(expression float dot (var_ref n) (var_ref i))
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(expression float dot (var_ref n) (var_ref i))))))))
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(if (expression bool < (var_ref k) (constant float (0.0)))
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((return (constant vec2 (0.0 0.0))))
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((return (expression vec2 -
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(expression vec2 * (var_ref eta) (var_ref i))
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(expression vec2 *
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(expression float +
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(expression float * (var_ref eta)
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(expression float dot (var_ref n) (var_ref i)))
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(expression float sqrt (var_ref k)))
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(var_ref n))))))))
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(signature vec3
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(parameters
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(declare (in) vec3 i)
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(declare (in) vec3 n)
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(declare (in) float eta))
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((declare () float k)
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(assign (constant bool (1)) (var_ref k)
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(expression float - (constant float (1.0))
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(expression float * (var_ref eta)
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(expression float * (var_ref eta)
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(expression float - (constant float (1.0))
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(expression float *
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(expression float dot (var_ref n) (var_ref i))
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(expression float dot (var_ref n) (var_ref i))))))))
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(if (expression bool < (var_ref k) (constant float (0.0)))
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((return (constant vec3 (0.0 0.0))))
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((return (expression vec3 -
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(expression vec3 * (var_ref eta) (var_ref i))
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(expression vec3 *
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(expression float +
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(expression float * (var_ref eta)
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(expression float dot (var_ref n) (var_ref i)))
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(expression float sqrt (var_ref k)))
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(var_ref n))))))))
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(signature vec4
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(parameters
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(declare (in) vec4 i)
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(declare (in) vec4 n)
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(declare (in) float eta))
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((declare () float k)
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(assign (constant bool (1)) (var_ref k)
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(expression float - (constant float (1.0))
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(expression float * (var_ref eta)
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(expression float * (var_ref eta)
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(expression float - (constant float (1.0))
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(expression float *
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(expression float dot (var_ref n) (var_ref i))
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(expression float dot (var_ref n) (var_ref i))))))))
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(if (expression bool < (var_ref k) (constant float (0.0)))
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((return (constant vec4 (0.0 0.0))))
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((return (expression vec4 -
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(expression vec4 * (var_ref eta) (var_ref i))
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(expression vec4 *
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(expression float +
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(expression float * (var_ref eta)
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(expression float dot (var_ref n) (var_ref i)))
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(expression float sqrt (var_ref k)))
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(var_ref n))))))))
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))
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