diff options
Diffstat (limited to 'intern/cycles/kernel/shaders/node_ramp_util.h')
-rw-r--r-- | intern/cycles/kernel/shaders/node_ramp_util.h | 108 |
1 files changed, 56 insertions, 52 deletions
diff --git a/intern/cycles/kernel/shaders/node_ramp_util.h b/intern/cycles/kernel/shaders/node_ramp_util.h index d07d5a98316..f7fb07b257d 100644 --- a/intern/cycles/kernel/shaders/node_ramp_util.h +++ b/intern/cycles/kernel/shaders/node_ramp_util.h @@ -18,72 +18,76 @@ color rgb_ramp_lookup(color ramp[], float at, int interpolate, int extrapolate) { - float f = at; - int table_size = arraylength(ramp); + float f = at; + int table_size = arraylength(ramp); - if ((f < 0.0 || f > 1.0) && extrapolate) { - color t0, dy; - if (f < 0.0) { - t0 = ramp[0]; - dy = t0 - ramp[1]; - f = -f; - } - else { - t0 = ramp[table_size - 1]; - dy = t0 - ramp[table_size - 2]; - f = f - 1.0; - } - return t0 + dy * f * (table_size - 1); - } + if ((f < 0.0 || f > 1.0) && extrapolate) { + color t0, dy; + if (f < 0.0) { + t0 = ramp[0]; + dy = t0 - ramp[1]; + f = -f; + } + else { + t0 = ramp[table_size - 1]; + dy = t0 - ramp[table_size - 2]; + f = f - 1.0; + } + return t0 + dy * f * (table_size - 1); + } - f = clamp(at, 0.0, 1.0) * (table_size - 1); + f = clamp(at, 0.0, 1.0) * (table_size - 1); - /* clamp int as well in case of NaN */ - int i = (int)f; - if (i < 0) i = 0; - if (i >= table_size) i = table_size - 1; - float t = f - (float)i; + /* clamp int as well in case of NaN */ + int i = (int)f; + if (i < 0) + i = 0; + if (i >= table_size) + i = table_size - 1; + float t = f - (float)i; - color result = ramp[i]; + color result = ramp[i]; - if (interpolate && t > 0.0) - result = (1.0 - t) * result + t * ramp[i + 1]; + if (interpolate && t > 0.0) + result = (1.0 - t) * result + t * ramp[i + 1]; - return result; + return result; } float rgb_ramp_lookup(float ramp[], float at, int interpolate, int extrapolate) { - float f = at; - int table_size = arraylength(ramp); + float f = at; + int table_size = arraylength(ramp); - if ((f < 0.0 || f > 1.0) && extrapolate) { - float t0, dy; - if (f < 0.0) { - t0 = ramp[0]; - dy = t0 - ramp[1]; - f = -f; - } - else { - t0 = ramp[table_size - 1]; - dy = t0 - ramp[table_size - 2]; - f = f - 1.0; - } - return t0 + dy * f * (table_size - 1); - } + if ((f < 0.0 || f > 1.0) && extrapolate) { + float t0, dy; + if (f < 0.0) { + t0 = ramp[0]; + dy = t0 - ramp[1]; + f = -f; + } + else { + t0 = ramp[table_size - 1]; + dy = t0 - ramp[table_size - 2]; + f = f - 1.0; + } + return t0 + dy * f * (table_size - 1); + } - f = clamp(at, 0.0, 1.0) * (table_size - 1); + f = clamp(at, 0.0, 1.0) * (table_size - 1); - /* clamp int as well in case of NaN */ - int i = (int)f; - if (i < 0) i = 0; - if (i >= table_size) i = table_size - 1; - float t = f - (float)i; + /* clamp int as well in case of NaN */ + int i = (int)f; + if (i < 0) + i = 0; + if (i >= table_size) + i = table_size - 1; + float t = f - (float)i; - float result = ramp[i]; + float result = ramp[i]; - if (interpolate && t > 0.0) - result = (1.0 - t) * result + t * ramp[i + 1]; + if (interpolate && t > 0.0) + result = (1.0 - t) * result + t * ramp[i + 1]; - return result; + return result; } |