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https://github.com/FWGS/xash3d-fwgs
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53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/*
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gl_frustum.cpp - frustum test implementation
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Copyright (C) 2016 Uncle Mike
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#ifndef GL_FRUSTUM_H
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#define GL_FRUSTUM_H
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// don't change this order
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#define FRUSTUM_LEFT 0
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#define FRUSTUM_RIGHT 1
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#define FRUSTUM_BOTTOM 2
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#define FRUSTUM_TOP 3
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#define FRUSTUM_FAR 4
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#define FRUSTUM_NEAR 5
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#define FRUSTUM_PLANES 6
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typedef struct gl_frustum_s
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{
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mplane_t planes[FRUSTUM_PLANES];
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unsigned int clipFlags;
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} gl_frustum_t;
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void GL_FrustumInitProj( gl_frustum_t *out, float flZNear, float flZFar, float flFovX, float flFovY );
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void GL_FrustumInitOrtho( gl_frustum_t *out, float xLeft, float xRight, float yTop, float yBottom, float flZNear, float flZFar );
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void GL_FrustumInitBox( gl_frustum_t *out, const vec3_t org, float radius ); // used for pointlights
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void GL_FrustumInitProjFromMatrix( gl_frustum_t *out, const matrix4x4 projection );
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void GL_FrustumSetPlane( gl_frustum_t *out, int side, const vec3_t vecNormal, float flDist );
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void GL_FrustumNormalizePlane( gl_frustum_t *out, int side );
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void GL_FrustumComputeBounds( gl_frustum_t *out, vec3_t mins, vec3_t maxs );
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void GL_FrustumComputeCorners( gl_frustum_t *out, vec3_t bbox[8] );
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void GL_FrustumDrawDebug( gl_frustum_t *out );
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// cull methods
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qboolean GL_FrustumCullBox( gl_frustum_t *out, const vec3_t mins, const vec3_t maxs, int userClipFlags );
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qboolean GL_FrustumCullSphere( gl_frustum_t *out, const vec3_t centre, float radius, int userClipFlags );
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// plane manipulating
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void GL_FrustumEnablePlane( gl_frustum_t *out, int side );
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void GL_FrustumDisablePlane( gl_frustum_t *out, int side );
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#endif//GL_FRUSTUM_H
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