diff options
Diffstat (limited to 'intern/cycles/kernel/shaders/node_rgb_ramp.osl')
| -rw-r--r-- | intern/cycles/kernel/shaders/node_rgb_ramp.osl | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/intern/cycles/kernel/shaders/node_rgb_ramp.osl b/intern/cycles/kernel/shaders/node_rgb_ramp.osl new file mode 100644 index 00000000000..a128ebbd1cf --- /dev/null +++ b/intern/cycles/kernel/shaders/node_rgb_ramp.osl @@ -0,0 +1,43 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "stdosl.h" +#include "oslutil.h" + +shader node_rgb_ramp( + color ramp_color[RAMP_TABLE_SIZE] = {0.0}, + float ramp_alpha[RAMP_TABLE_SIZE] = {0.0}, + + float Fac = 0.0, + output color Color = color(0.0, 0.0, 0.0), + output float Alpha = 1.0) +{ + float f = clamp(Fac, 0.0, 1.0) * (RAMP_TABLE_SIZE - 1); + + int i = (int)f; + float t = f - (float)i; + + Color = ramp_color[i]; + Alpha = ramp_alpha[i]; + + if (t > 0.0) { + Color = (1.0 - t) * Color + t * ramp_color[i + 1]; + Alpha = (1.0 - t) * Alpha + t * ramp_alpha[i + 1]; + } +} + |