diff options
Diffstat (limited to 'intern/cycles/kernel/shaders/node_map_range.osl')
-rw-r--r-- | intern/cycles/kernel/shaders/node_map_range.osl | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/intern/cycles/kernel/shaders/node_map_range.osl b/intern/cycles/kernel/shaders/node_map_range.osl index 8a28edf5f35..242ec4271ed 100644 --- a/intern/cycles/kernel/shaders/node_map_range.osl +++ b/intern/cycles/kernel/shaders/node_map_range.osl @@ -16,14 +16,43 @@ #include "stdosl.h" -shader node_map_range(float Value = 1.0, +float safe_divide(float a, float b) +{ + return (b != 0.0) ? a / b : 0.0; +} + +float smootherstep(float edge0, float edge1, float x) +{ + float t = clamp(safe_divide((x - edge0), (edge1 - edge0)), 0.0, 1.0); + return t * t * t * (t * (t * 6.0 - 15.0) + 10.0); +} + +shader node_map_range(string type = "linear", + float Value = 1.0, float FromMin = 0.0, float FromMax = 1.0, float ToMin = 0.0, float ToMax = 1.0, + float Steps = 4.0, output float Result = 0.0) { if (FromMax != FromMin) { - Result = ToMin + ((Value - FromMin) / (FromMax - FromMin)) * (ToMax - ToMin); + float Factor = Value; + if (type == "stepped") { + Factor = (Value - FromMin) / (FromMax - FromMin); + Factor = (Steps > 0) ? floor(Factor * (Steps + 1.0)) / Steps : 0.0; + } + else if (type == "smoothstep") { + Factor = (FromMin > FromMax) ? 1.0 - smoothstep(FromMax, FromMin, Value) : + smoothstep(FromMin, FromMax, Value); + } + else if (type == "smootherstep") { + Factor = (FromMin > FromMax) ? 1.0 - smootherstep(FromMax, FromMin, Value) : + smootherstep(FromMin, FromMax, Value); + } + else { + Factor = (Value - FromMin) / (FromMax - FromMin); + } + Result = ToMin + Factor * (ToMax - ToMin); } } |