SYNOPSIS
pfspanoramic <source projection>+<target projection> [width <val>] [height <val>] [oversample <val>] [interpolate] [xrotate <angle>] [yrotate <angle>] [zrotate <angle>]DESCRIPTION
Transform spherical maps between various projections. Currently polar (latitudelongitude), angular (light probe), mirrorball and cylindrical are supported. The syntax for specifying the transformation is source_projection+target_projection, where source_projection is the current mapping that source image uses and target_projection is the projection you'd like it to be transformed to. If the projection has some optional parameters, you can specify them with syntax: <source projection>/<argument>/...+<target projection>/<argument>/...As of now only angular supports a parameter  angle  which defines how many degrees from the viewing direction the projection should cover, e.g. angular+angular/angle=180 converts angular image to show only half of a hemisphere around the viewing direction.
OPTIONS
 width <val>, w <val>
 height <val>, h <val>

Make the target image respectively <val> pixels wide and/or high. If only one is specified, the other is computed from the target projection's typical W/H ratio. If neither is specified, the width is taken from the source image and height is computed as above.
 oversample <val>, o <val>

Oversample each target pixel <val>x<val> times, improving quality in areas that are scaled down with respect to the source image. Reasonable values are 2 to 5, while setting it higher may make the reprojection unbearably slow.
 interpolate, i

Use bilinear interpolation when sampling the source image. Increases quality in magnified areas.
 xrotate <angle>, x <angle>

Rotate the spherical image <angle> degrees around X axis.
 yrotate <angle>, y <angle>

Rotate the spherical image <angle> degrees around Y axis.
 zrotate <angle>, z <angle>

Rotate the spherical image <angle> degrees around Z axis.
EXAMPLES
 pfsin grace_probe.hdr  pfspanoramic angular+polar i o 3 y 90 w 500  pfsout grace.hdr

Transform grace angular map to polar (latitudelongitude) projection applying bilinear interpolation and 3x3 oversampling, while rotating it by 90 degrees around Y axis. The image will be resized to 500x250 pixels (as the polar projection has 2:1 widthtoheight ratio) and finally saved in grace.hdr.