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