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Fixes to Color Balance node:

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* The Lift/Gamma/Gain formula previously was incorrect, fixed this and 
removed conversions - now the RNA values are the same as what goes into 
the formula.
* Because of this, added the ability for the Value slider to map to a wider range 
than 0.0-1.0. The black/white gradient remains the same, in this case just 
indicating darker/brighter rather than absolute colour values. Also added ability 
for color wheels to be locked at full brightness (useful for this case, where the 
color value itself is dark).
* Added an alternate formula - offset/power/slope (asc-cdl). This fits the standard 
Color Decision List formula, here for compatibility with other systems, though 
default Lift/Gamma/Gain is easier to use and gives nicer results.
This commit is contained in:
Matt Ebb
2010-01-27 00:22:29 +00:00
parent ebafb7e484
commit 0bb36e9ced
8 changed files with 170 additions and 70 deletions
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11
source/blender/editors/interface/interface_widgets.c
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@@ -1577,6 +1577,11 @@ void ui_draw_but_HSVCIRCLE(uiBut *but, uiWidgetColors *wcol, rcti *rect)
rgb_to_hsv(rgb[0], rgb[1], rgb[2], hsv, hsv+1, hsv+2);
copy_v3_v3(hsvo, hsv);
/* exception: if 'lock' is set (stored in but->a2),
* lock the value of the color wheel to 1.
* Useful for color correction tools where you're only interested in hue. */
if (but->a2) hsv[2] = 1.f;
hsv_to_rgb(0.f, 0.f, hsv[2], colcent, colcent+1, colcent+2);
glShadeModel(GL_SMOOTH);
@@ -1793,7 +1798,7 @@ static void ui_draw_but_HSV_v(uiBut *but, rcti *rect)
uiWidgetBase wtb;
float rad= 0.5f*(rect->xmax - rect->xmin);
float x, y;
float rgb[3], hsv[3], v;
float rgb[3], hsv[3], v, range;
int color_profile = but->block->color_profile;
if (but->rnaprop) {
@@ -1808,6 +1813,10 @@ static void ui_draw_but_HSV_v(uiBut *but, rcti *rect)
if (color_profile)
v = linearrgb_to_srgb(v);
/* map v from property range to [0,1] */
range = but->softmax - but->softmin;
v = (v - but->softmin)/range;
widget_init(&wtb);