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GUI/GUI_PolygonNormalShade.h
/*
* Copyright (c) 2024
* Side Effects Software Inc. All rights reserved.
*
* Redistribution and use of Houdini Development Kit samples in source and
* binary forms, with or without modification, are permitted provided that the
* following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. The name of Side Effects Software may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `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 SIDE EFFECTS SOFTWARE 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.
*/
/*
* COMMENTS:
* Example of a filter hook.
* Replaces Cd in a GT polygon mesh with false N color, mapped from
* normalized [-1,1] to [0,1].
*/
#ifndef GUI_PolygonNormalShade_h
#define GUI_PolygonNormalShade_h
#include <
GUI/GUI_PrimitiveHook.h
>
namespace
HDK_Sample
{
/// Render hook which visualizes normals by painting a normal map on
/// polygon geometry with Cd.
class
GUI_PolygonNormalShade :
public
GUI_PrimitiveHook
{
public
:
GUI_PolygonNormalShade();
~GUI_PolygonNormalShade()
override
;
/// The main virtual for filtering GT or GEO primitives. If the hook is
/// interested in the primitive, it should set 'processed' to GR_PROCESSED,
/// even if it is not actively modifying the primitive (in which case
/// return a NULL primitive handle). This ensures that the primitive will
/// be updated when its display option is toggled. If not interested in the
/// primitive at all, set 'processed' to GR_NOT_PROCESSED.
GT_PrimitiveHandle
filterPrimitive(
const
GT_PrimitiveHandle
>_prm,
const
GEO_Primitive
*geo_prm,
const
GR_RenderInfo
*info,
GR_PrimAcceptResult
&processed)
override
;
};
}
#endif
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