Brecht Van Lommel
9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#include "stdcycles.h"
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float safe_divide(float a, float b)
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{
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return (b != 0.0) ? a / b : 0.0;
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}
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float smootherstep(float edge0, float edge1, float x)
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{
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float t = clamp(safe_divide((x - edge0), (edge1 - edge0)), 0.0, 1.0);
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return t * t * t * (t * (t * 6.0 - 15.0) + 10.0);
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}
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shader node_map_range(string range_type = "linear",
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float Value = 1.0,
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float FromMin = 0.0,
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float FromMax = 1.0,
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float ToMin = 0.0,
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float ToMax = 1.0,
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float Steps = 4.0,
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output float Result = 0.0)
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{
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if (FromMax != FromMin) {
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float Factor = Value;
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if (range_type == "stepped") {
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Factor = (Value - FromMin) / (FromMax - FromMin);
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Factor = (Steps > 0) ? floor(Factor * (Steps + 1.0)) / Steps : 0.0;
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}
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else if (range_type == "smoothstep") {
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Factor = (FromMin > FromMax) ? 1.0 - smoothstep(FromMax, FromMin, Value) :
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smoothstep(FromMin, FromMax, Value);
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}
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else if (range_type == "smootherstep") {
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Factor = (FromMin > FromMax) ? 1.0 - smootherstep(FromMax, FromMin, Value) :
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smootherstep(FromMin, FromMax, Value);
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}
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else {
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Factor = (Value - FromMin) / (FromMax - FromMin);
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}
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Result = ToMin + Factor * (ToMax - ToMin);
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}
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}
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