mirror of
https://github.com/opencv/opencv.git
synced 2024-11-26 20:20:20 +08:00
329 lines
6.9 KiB
C++
329 lines
6.9 KiB
C++
///////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
|
|
// Digital Ltd. LLC
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following disclaimer
|
|
// in the documentation and/or other materials provided with the
|
|
// distribution.
|
|
// * Neither the name of Industrial Light & Magic nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Environment maps
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include <ImfEnvmap.h>
|
|
#include "ImathFun.h"
|
|
#include <algorithm>
|
|
#include <math.h>
|
|
|
|
using namespace std;
|
|
using namespace Imath;
|
|
|
|
namespace Imf {
|
|
namespace LatLongMap {
|
|
|
|
V2f
|
|
latLong (const V3f &dir)
|
|
{
|
|
float r = sqrt (dir.z * dir.z + dir.x * dir.x);
|
|
|
|
float latitude = (r < abs (dir.y))?
|
|
acos (r / dir.length()) * sign (dir.y):
|
|
asin (dir.y / dir.length());
|
|
|
|
float longitude = (dir.z == 0 && dir.x == 0)? 0: atan2 (dir.x, dir.z);
|
|
|
|
return V2f (latitude, longitude);
|
|
}
|
|
|
|
|
|
V2f
|
|
latLong (const Box2i &dataWindow, const V2f &pixelPosition)
|
|
{
|
|
float latitude, longitude;
|
|
|
|
if (dataWindow.max.y > dataWindow.min.y)
|
|
{
|
|
latitude = -M_PI *
|
|
((pixelPosition.y - dataWindow.min.y) /
|
|
(dataWindow.max.y - dataWindow.min.y) - 0.5f);
|
|
}
|
|
else
|
|
{
|
|
latitude = 0;
|
|
}
|
|
|
|
if (dataWindow.max.x > dataWindow.min.x)
|
|
{
|
|
longitude = -2 * M_PI *
|
|
((pixelPosition.x - dataWindow.min.x) /
|
|
(dataWindow.max.x - dataWindow.min.x) - 0.5f);
|
|
}
|
|
else
|
|
{
|
|
longitude = 0;
|
|
}
|
|
|
|
return V2f (latitude, longitude);
|
|
}
|
|
|
|
|
|
V2f
|
|
pixelPosition (const Box2i &dataWindow, const V2f &latLong)
|
|
{
|
|
float x = latLong.y / (-2 * M_PI) + 0.5f;
|
|
float y = latLong.x / -M_PI + 0.5f;
|
|
|
|
return V2f (x * (dataWindow.max.x - dataWindow.min.x) + dataWindow.min.x,
|
|
y * (dataWindow.max.y - dataWindow.min.y) + dataWindow.min.y);
|
|
}
|
|
|
|
|
|
V2f
|
|
pixelPosition (const Box2i &dataWindow, const V3f &direction)
|
|
{
|
|
return pixelPosition (dataWindow, latLong (direction));
|
|
}
|
|
|
|
|
|
V3f
|
|
direction (const Box2i &dataWindow, const V2f &pixelPosition)
|
|
{
|
|
V2f ll = latLong (dataWindow, pixelPosition);
|
|
|
|
return V3f (sin (ll.y) * cos (ll.x),
|
|
sin (ll.x),
|
|
cos (ll.y) * cos (ll.x));
|
|
}
|
|
|
|
} // namespace LatLongMap
|
|
|
|
|
|
namespace CubeMap {
|
|
|
|
int
|
|
sizeOfFace (const Box2i &dataWindow)
|
|
{
|
|
return min ((dataWindow.max.x - dataWindow.min.x + 1),
|
|
(dataWindow.max.y - dataWindow.min.y + 1) / 6);
|
|
}
|
|
|
|
|
|
Box2i
|
|
dataWindowForFace (CubeMapFace face, const Box2i &dataWindow)
|
|
{
|
|
int sof = sizeOfFace (dataWindow);
|
|
Box2i dwf;
|
|
|
|
dwf.min.x = 0;
|
|
dwf.min.y = int (face) * sof;
|
|
|
|
dwf.max.x = dwf.min.x + sof - 1;
|
|
dwf.max.y = dwf.min.y + sof - 1;
|
|
|
|
return dwf;
|
|
}
|
|
|
|
|
|
V2f
|
|
pixelPosition (CubeMapFace face, const Box2i &dataWindow, V2f positionInFace)
|
|
{
|
|
Box2i dwf = dataWindowForFace (face, dataWindow);
|
|
V2f pos (0, 0);
|
|
|
|
switch (face)
|
|
{
|
|
case CUBEFACE_POS_X:
|
|
|
|
pos.x = dwf.min.x + positionInFace.y;
|
|
pos.y = dwf.max.y - positionInFace.x;
|
|
break;
|
|
|
|
case CUBEFACE_NEG_X:
|
|
|
|
pos.x = dwf.max.x - positionInFace.y;
|
|
pos.y = dwf.max.y - positionInFace.x;
|
|
break;
|
|
|
|
case CUBEFACE_POS_Y:
|
|
|
|
pos.x = dwf.min.x + positionInFace.x;
|
|
pos.y = dwf.max.y - positionInFace.y;
|
|
break;
|
|
|
|
case CUBEFACE_NEG_Y:
|
|
|
|
pos.x = dwf.min.x + positionInFace.x;
|
|
pos.y = dwf.min.y + positionInFace.y;
|
|
break;
|
|
|
|
case CUBEFACE_POS_Z:
|
|
|
|
pos.x = dwf.max.x - positionInFace.x;
|
|
pos.y = dwf.max.y - positionInFace.y;
|
|
break;
|
|
|
|
case CUBEFACE_NEG_Z:
|
|
|
|
pos.x = dwf.min.x + positionInFace.x;
|
|
pos.y = dwf.max.y - positionInFace.y;
|
|
break;
|
|
}
|
|
|
|
return pos;
|
|
}
|
|
|
|
|
|
void
|
|
faceAndPixelPosition (const V3f &direction,
|
|
const Box2i &dataWindow,
|
|
CubeMapFace &face,
|
|
V2f &pif)
|
|
{
|
|
int sof = sizeOfFace (dataWindow);
|
|
float absx = abs (direction.x);
|
|
float absy = abs (direction.y);
|
|
float absz = abs (direction.z);
|
|
|
|
if (absx >= absy && absx >= absz)
|
|
{
|
|
if (absx == 0)
|
|
{
|
|
//
|
|
// Special case - direction is (0, 0, 0)
|
|
//
|
|
|
|
face = CUBEFACE_POS_X;
|
|
pif = V2f (0, 0);
|
|
return;
|
|
}
|
|
|
|
pif.x = (direction.y / absx + 1) / 2 * (sof - 1);
|
|
pif.y = (direction.z / absx + 1) / 2 * (sof - 1);
|
|
|
|
if (direction.x > 0)
|
|
face = CUBEFACE_POS_X;
|
|
else
|
|
face = CUBEFACE_NEG_X;
|
|
}
|
|
else if (absy >= absz)
|
|
{
|
|
pif.x = (direction.x / absy + 1) / 2 * (sof - 1);
|
|
pif.y = (direction.z / absy + 1) / 2 * (sof - 1);
|
|
|
|
if (direction.y > 0)
|
|
face = CUBEFACE_POS_Y;
|
|
else
|
|
face = CUBEFACE_NEG_Y;
|
|
}
|
|
else
|
|
{
|
|
pif.x = (direction.x / absz + 1) / 2 * (sof - 1);
|
|
pif.y = (direction.y / absz + 1) / 2 * (sof - 1);
|
|
|
|
if (direction.z > 0)
|
|
face = CUBEFACE_POS_Z;
|
|
else
|
|
face = CUBEFACE_NEG_Z;
|
|
}
|
|
}
|
|
|
|
|
|
V3f
|
|
direction (CubeMapFace face, const Box2i &dataWindow, const V2f &positionInFace)
|
|
{
|
|
int sof = sizeOfFace (dataWindow);
|
|
|
|
V2f pos;
|
|
|
|
if (sof > 1)
|
|
{
|
|
pos = V2f (positionInFace.x / (sof - 1) * 2 - 1,
|
|
positionInFace.y / (sof - 1) * 2 - 1);
|
|
}
|
|
else
|
|
{
|
|
pos = V2f (0, 0);
|
|
}
|
|
|
|
V3f dir (1, 0, 0);
|
|
|
|
switch (face)
|
|
{
|
|
case CUBEFACE_POS_X:
|
|
|
|
dir.x = 1;
|
|
dir.y = pos.x;
|
|
dir.z = pos.y;
|
|
break;
|
|
|
|
case CUBEFACE_NEG_X:
|
|
|
|
dir.x = -1;
|
|
dir.y = pos.x;
|
|
dir.z = pos.y;
|
|
break;
|
|
|
|
case CUBEFACE_POS_Y:
|
|
|
|
dir.x = pos.x;
|
|
dir.y = 1;
|
|
dir.z = pos.y;
|
|
break;
|
|
|
|
case CUBEFACE_NEG_Y:
|
|
|
|
dir.x = pos.x;
|
|
dir.y = -1;
|
|
dir.z = pos.y;
|
|
break;
|
|
|
|
case CUBEFACE_POS_Z:
|
|
|
|
dir.x = pos.x;
|
|
dir.y = pos.y;
|
|
dir.z = 1;
|
|
break;
|
|
|
|
case CUBEFACE_NEG_Z:
|
|
|
|
dir.x = pos.x;
|
|
dir.y = pos.y;
|
|
dir.z = -1;
|
|
break;
|
|
}
|
|
|
|
return dir;
|
|
}
|
|
|
|
} // namespace CubeMap
|
|
} // namespace Imf
|