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Rename variables for consistency.
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model/gamut_compress.ctl

Lines changed: 27 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,3 @@
1-
21
// <ACEStransformID>urn:ampas:aces:transformId:v1.5:LMT.VWG.GamutCompress.a1.v1</ACEStransformID>
32
// <ACESuserName>ACES 1.3 Look - Gamut Compress</ACESuserName>
43

@@ -24,30 +23,30 @@ import "ACESlib.Transform_Common";
2423

2524
/* --- Gamut Compress Parameters --- */
2625
// Distance from achromatic which will be compressed to the gamut boundary
27-
const float lim_cyan = 1.147;
28-
const float lim_magenta = 1.264;
29-
const float lim_yellow = 1.312;
26+
const float LIM_CYAN = 1.147;
27+
const float LIM_MAGENTA = 1.264;
28+
const float LIM_YELLOW = 1.312;
3029

3130
// Percentage of the core gamut to protect
32-
const float thr_cyan = 0.815;
33-
const float thr_magenta = 0.803;
34-
const float thr_yellow = 0.880;
31+
const float THR_CYAN = 0.815;
32+
const float THR_MAGENTA = 0.803;
33+
const float THR_YELLOW = 0.880;
3534

3635
// Agressiveness of the compression curve
37-
const float pwr = 1.2;
36+
const float PWR = 1.2;
3837

3938

4039

4140
// Calculate compressed distance
4241
float compress(float dist, float lim, float thr, float pwr, bool invert)
4342
{
44-
float compr_dist;
43+
float comprDist;
4544
float scl;
4645
float nd;
4746
float p;
4847

4948
if (dist < thr) {
50-
compr_dist = dist; // No compression below threshold
49+
comprDist = dist; // No compression below threshold
5150
}
5251
else {
5352
// Calculate scale factor for y = 1 intersect
@@ -58,19 +57,19 @@ float compress(float dist, float lim, float thr, float pwr, bool invert)
5857
p = pow(nd, pwr);
5958

6059
if (!invert) {
61-
compr_dist = thr + scl * nd / (pow(1.0 + p, 1.0 / pwr)); // Compress
60+
comprDist = thr + scl * nd / (pow(1.0 + p, 1.0 / pwr)); // Compress
6261
}
6362
else {
6463
if (dist > (thr + scl)) {
65-
compr_dist = dist; // Avoid singularity
64+
comprDist = dist; // Avoid singularity
6665
}
6766
else {
68-
compr_dist = thr + scl * pow(-(p / (p - 1.0)), 1.0 / pwr); // Uncompress
67+
comprDist = thr + scl * pow(-(p / (p - 1.0)), 1.0 / pwr); // Uncompress
6968
}
7069
}
7170
}
7271

73-
return compr_dist;
72+
return comprDist;
7473
}
7574

7675

@@ -92,10 +91,10 @@ void main
9291
float ACES[3] = {rIn, gIn, bIn};
9392

9493
// Convert to ACEScg
95-
float lin_AP1[3] = mult_f3_f44(ACES, AP0_2_AP1_MAT);
94+
float linAP1[3] = mult_f3_f44(ACES, AP0_2_AP1_MAT);
9695

9796
// Achromatic axis
98-
float ach = max_f3(lin_AP1);
97+
float ach = max_f3(linAP1);
9998

10099
// Distance from the achromatic axis for each color component aka inverse RGB ratios
101100
float dist[3];
@@ -105,27 +104,27 @@ void main
105104
dist[2] = 0.0;
106105
}
107106
else {
108-
dist[0] = (ach - lin_AP1[0]) / fabs(ach);
109-
dist[1] = (ach - lin_AP1[1]) / fabs(ach);
110-
dist[2] = (ach - lin_AP1[2]) / fabs(ach);
107+
dist[0] = (ach - linAP1[0]) / fabs(ach);
108+
dist[1] = (ach - linAP1[1]) / fabs(ach);
109+
dist[2] = (ach - linAP1[2]) / fabs(ach);
111110
}
112111

113112
// Compress distance with parameterized shaper function
114-
float compr_dist[3] = {
115-
compress(dist[0], lim_cyan, thr_cyan, pwr, invert),
116-
compress(dist[1], lim_magenta, thr_magenta, pwr, invert),
117-
compress(dist[2], lim_yellow, thr_yellow, pwr, invert)
113+
float comprDist[3] = {
114+
compress(dist[0], LIM_CYAN, THR_CYAN, PWR, invert),
115+
compress(dist[1], LIM_MAGENTA, THR_MAGENTA, PWR, invert),
116+
compress(dist[2], LIM_YELLOW, THR_YELLOW, PWR, invert)
118117
};
119118

120119
// Recalculate RGB from compressed distance and achromatic
121-
float compr_lin_AP1[3] = {
122-
ach - compr_dist[0] * fabs(ach),
123-
ach - compr_dist[1] * fabs(ach),
124-
ach - compr_dist[2] * fabs(ach)
120+
float comprLinAP1[3] = {
121+
ach - comprDist[0] * fabs(ach),
122+
ach - comprDist[1] * fabs(ach),
123+
ach - comprDist[2] * fabs(ach)
125124
};
126125

127126
// Convert back to ACES2065-1
128-
ACES = mult_f3_f44(compr_lin_AP1, AP1_2_AP0_MAT);
127+
ACES = mult_f3_f44(comprLinAP1, AP1_2_AP0_MAT);
129128

130129
// Write output
131130
rOut = ACES[0];

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