diff options
author | Lukas Tönne <lukas.toenne@gmail.com> | 2014-07-26 14:59:29 +0400 |
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committer | Lukas Tönne <lukas.toenne@gmail.com> | 2014-07-26 14:59:29 +0400 |
commit | e15cdec2d49ee47a85897db9838578a298146513 (patch) | |
tree | ad3ae9a05feb9819df98504951a80d3c5daadf9b /source/blender/compositor/operations/COM_SunBeamsOperation.h | |
parent | 08725cce5a7226165a5599d165217ca89217ad0f (diff) |
New compositor node "Sun Beams"
This allows adding a "fake" sun beam effect, simulating crepuscular rays
from light being scattered in a medium like the atmosphere or deep water.
Such effects can be created also by renderers using volumetric lighting,
but the compositor feature is a lot cheaper and is independent from 3D
rendering. This makes it ideally suited for motion graphics.
The implementation uses am optimized accumulation method for gathering
color values along a line segment. The inner buffer loop uses fixed
offset increments to avoid unnecessary multiplications and avoids
variables by using compile-time specialization (see inline comments
for further details).
Diffstat (limited to 'source/blender/compositor/operations/COM_SunBeamsOperation.h')
-rw-r--r-- | source/blender/compositor/operations/COM_SunBeamsOperation.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_SunBeamsOperation.h b/source/blender/compositor/operations/COM_SunBeamsOperation.h new file mode 100644 index 00000000000..ef80a31fe40 --- /dev/null +++ b/source/blender/compositor/operations/COM_SunBeamsOperation.h @@ -0,0 +1,48 @@ +/* + * Copyright 2014, 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. + * + * Contributor: + * Lukas Toenne + */ + +#ifndef _COM_SunBeamsOperation_h +#define _COM_SunBeamsOperation_h + +#include "COM_NodeOperation.h" + +class SunBeamsOperation : public NodeOperation { +public: + SunBeamsOperation(); + + void executePixel(float output[4], int x, int y, void *data); + + void initExecution(); + + void *initializeTileData(rcti *rect); + + bool determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output); + + void setData(const NodeSunBeams &data) { m_data = data; } + +private: + NodeSunBeams m_data; + + float m_source_px[2]; + float m_ray_length_px; +}; + +#endif |