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nilsberglund-orleans
2022-03-13 15:29:50 +01:00
committed by GitHub
parent ca88b9db5c
commit f570f6885e
11 changed files with 4564 additions and 1593 deletions
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207
colormaps.c
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@@ -2339,3 +2339,210 @@ void hsl_to_rgb_twilight(double h, double s, double l, double rgb[3])
else if (color_hue < 0) color_hue = 0;
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)twilight_srgb_floats[color_hue][i];
}
void hsl_to_rgb_palette(double h, double s, double l, double rgb[3], int palette)
/* color conversion from HSL to RGB */
{
int color_hue, i;
double r, g, b, ratio = 0.711111111, interpolate; /* ratio equals 256/360 */
switch (palette) {
case (COL_JET):
{
hsl_to_rgb_jet(h, s, l, rgb);
break;
}
case (COL_HSLUV):
{
hsluv2rgb(h, 100.0*s, l, &r, &g, &b);
rgb[0] = 2.0*l*r*100.0;
rgb[1] = 2.0*l*g*100.0;
rgb[2] = 2.0*l*b*100.0;
break;
}
case (COL_GRAY):
{
color_hue = h/360.0;
rgb[0] = color_hue;
rgb[1] = color_hue;
rgb[2] = color_hue;
break;
}
case (COL_TURBO):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)turbo_srgb_floats[color_hue][i];
break;
}
case (COL_VIRIDIS):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)viridis_srgb_floats[color_hue][i];
break;
}
case (COL_MAGMA):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)magma_srgb_floats[color_hue][i];
break;
}
case (COL_INFERNO):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)inferno_srgb_floats[color_hue][i];
break;
}
case (COL_PLASMA):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)plasma_srgb_floats[color_hue][i];
break;
}
case (COL_CIVIDIS):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)cividis_srgb_floats[color_hue][i];
break;
}
case (COL_PARULA):
{
color_hue = 255 - (int)(ratio*h);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)parula_srgb_floats[color_hue][i];
break;
}
case (COL_TWILIGHT):
{
color_hue = 510 - (int)(2.0*ratio*h);
if (color_hue > 510) color_hue = 510;
else if (color_hue < 0) color_hue = 0;
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)twilight_srgb_floats[color_hue][i];
break;
}
case (COL_TWILIGHT_SHIFTED):
{
// color_hue = 255 - (int)(2.0*ratio*h);
color_hue = (int)(2.0*ratio*h) - 255;
if (color_hue > 510) color_hue -= 510;
else if (color_hue < 0) color_hue += 510;
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)twilight_srgb_floats[color_hue][i];
break;
}
case (COL_TURBO_CYCLIC):
{
if (h < 330.0)
{
color_hue = 255 - (int)(ratio*h*12.0/11.0);
for (i=0; i<3; i++) rgb[i] = 2.0*l*(double)turbo_srgb_floats[color_hue][i];
}
else /* use a convex combination to interpolate between extremal Turbo values */
{
if (h > 360.0) h = 360.0;
interpolate = (h - 330.0)/30.0;
for (i=0; i<3; i++)
rgb[i] = (1.0 - interpolate)*(double)turbo_srgb_floats[255][i] + interpolate*(double)turbo_srgb_floats[0][i];
}
break;
}
}
}
void amp_to_rgb_palette(double h, double rgb[3], int palette) /* color conversion from amplitude in [0,1] to RGB */
{
int color_hue, i;
double r, g, b, interpolate;
color_hue = (int)(256.0*h);
if (color_hue > 255) color_hue = 255;
switch (palette) {
case (COL_JET):
{
hsl_to_rgb_jet(360.0*(1.0 - h), 0.9, 0.5, rgb);
break;
}
case (COL_HSLUV):
{
hsluv2rgb(360.0*(1.0 - h), 90.0, 0.5, &r, &g, &b);
rgb[0] = r*100.0;
rgb[1] = g*100.0;
rgb[2] = b*100.0;
break;
}
case (COL_GRAY):
{
rgb[0] = h;
rgb[1] = h;
rgb[2] = h;
break;
}
case (COL_TURBO):
{
for (i=0; i<3; i++) rgb[i] = (double)turbo_srgb_floats[color_hue][i];
break;
}
case (COL_VIRIDIS):
{
for (i=0; i<3; i++) rgb[i] = (double)viridis_srgb_floats[color_hue][i];
break;
}
case (COL_MAGMA):
{
for (i=0; i<3; i++) rgb[i] = (double)magma_srgb_floats[color_hue][i];
break;
}
case (COL_INFERNO):
{
for (i=0; i<3; i++) rgb[i] = (double)inferno_srgb_floats[color_hue][i];
break;
}
case (COL_PLASMA):
{
for (i=0; i<3; i++) rgb[i] = (double)plasma_srgb_floats[color_hue][i];
break;
}
case (COL_CIVIDIS):
{
for (i=0; i<3; i++) rgb[i] = (double)cividis_srgb_floats[color_hue][i];
break;
}
case (COL_PARULA):
{
for (i=0; i<3; i++) rgb[i] = (double)parula_srgb_floats[color_hue][i];
break;
}
case (COL_TWILIGHT):
{
color_hue = (int)(511.0*h);
if (color_hue > 510) color_hue = 510;
else if (color_hue < 0) color_hue = 0;
for (i=0; i<3; i++) rgb[i] = (double)twilight_srgb_floats[color_hue][i];
break;
}
case (COL_TWILIGHT_SHIFTED):
{
// color_hue = (int)(511.0*h) + 255;
color_hue = 255 - (int)(511.0*h);
if (color_hue > 510) color_hue -= 510;
else if (color_hue < 0) color_hue += 510;
for (i=0; i<3; i++) rgb[i] = (double)twilight_srgb_floats[color_hue][i];
break;
}
case (COL_TURBO_CYCLIC):
{
if (h < 0.9)
{
color_hue = (int)(256.0*h/0.9);
for (i=0; i<3; i++) rgb[i] = (double)turbo_srgb_floats[color_hue][i];
}
else /* use a convex combination to interpolate between extremal Turbo values */
{
if (h > 1.0) h = 1.0;
interpolate = (h - 0.9)/0.1;
for (i=0; i<3; i++)
rgb[i] = (1.0 - interpolate)*(double)turbo_srgb_floats[255][i] + interpolate*(double)turbo_srgb_floats[0][i];
}
break;
}
}
}