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https://github.com/PixarAnimationStudios/OpenSubdiv
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3.8 KiB
ReStructuredText
136 lines
3.8 KiB
ReStructuredText
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Copyright 2013 Pixar
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Licensed under the Apache License, Version 2.0 (the "Apache License")
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with the following modification; you may not use this file except in
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compliance with the Apache License and the following modification to it:
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Section 6. Trademarks. is deleted and replaced with:
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6. Trademarks. This License does not grant permission to use the trade
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names, trademarks, service marks, or product names of the Licensor
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and its affiliates, except as required to comply with Section 4(c) of
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the License and to reproduce the content of the NOTICE file.
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You may obtain a copy of the Apache License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the Apache License with the above modification is
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distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the Apache License for the specific
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language governing permissions and limitations under the Apache License.
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glPtexViewer
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------------
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.. contents::
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:local:
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:backlinks: none
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SYNOPSIS
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========
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.. parsed-literal::
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:class: codefhead
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**glPtexViewer**
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[**-e** *environment map*]
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[**-d** *HDR diffuse map*]
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[**-s** *HDR specular map*]
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[**-y**]
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[**--disp** *displacement scale*]
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[**--bump** *bump scale*]
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[**-l** *isolation level*]
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[**-c** *animation loops*]
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[**-f**]
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*ptex color file*
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*ptex displacement file*
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*ptex occlusion file*
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*ptex specular file*
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*objfile(s)*
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DESCRIPTION
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===========
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``glPtexViewer`` is a stand-alone application that showcases advanced HDR shading
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with color, displacement, occlusion and specular ptex maps. Multiple controls
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are available to experiment with the algorithms.
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.. image:: images/barb_1.jpg
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:width: 400px
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:align: center
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:target: images/barb_1.jpg
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OPTIONS
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=======
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**-e** *environment map*
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A low dynamic range spherical environment map used as a background. Ideally,
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a color-normalized version of the HDR light probe.
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**-d** *HDR diffuse map*
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An HDR file containing a diffuse environment map (typically they are low
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resolution blurry hemispherical convolutions of the environment light probe).
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**-s** *environment map*
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An HDR file containing a specular environment map.
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**--disp** *displacement scale*
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A scalar multiplier for the shader displacement values.
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**--bump** *displacement scale*
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A scalar multiplier for the shader bump values.
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**-y**
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Swap Z-up geometry to Y-UP.
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**-l** *isolation level*
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Select the desired isolation level of adaptive feature isolation. This can be
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useful when trying to load large pieces of geometry.
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**-c** *animation frequency*
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Number of repetitions of the animation loop (default=0 is infinite)
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**-f**
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Launches the application in full-screen mode (if is supported by GLFW on the
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OS)
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*ptex color file*
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A ptex file containing RGB channels read as material albedo color.
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*ptex displacement file*
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A single-channel ptex file (preferably float precision) containing the
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displacement values.
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*ptex occlusion file*
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A single-channel ptex file (preferably 8 bits precision) containing a
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pre-computed ambient occlusion signal.
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*ptex specular file*
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A single-channel ptex file (preferably 8 bits precision) applied to modulate
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the specular reflectance of the material
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*objfile(s)*
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A sequence of obj files used as an animation loop (the topology has to match
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the data contained in all the ptex files !)
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Keyboard Controls
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=================
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.. code:: c++
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q : quit
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esc : hide GUI
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x : save screenshot
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f : fit frame
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+/- : increase / decrease tessellation rate
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r : reload and re-compile the shader files
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e : draw normals
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.. include:: examples_see_also.rst
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