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m_plane.cpp File Reference

plane calculations More...

#include "omicron/internal.h"
#include <math.h>

Go to the source code of this file.

Functions
plane_t	plane_frompoints (const vec3_t a, const vec3_t b, const vec3_t c)
	create a plane
float	plane_line_intersect (const vec3_t a, const vec3_t b, const plane_t *p, vec3_t out)
float	plane_pointdist (const vec3_t v, const plane_t *p)
int	plane_pointside (const vec3_t v, const plane_t *p)
int	plane_clip_box (const plane_t *p, const bbox_t *bbox)

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Detailed Description

Definition in file m_plane.cpp.

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Function Documentation

int plane_clip_box (  const plane_t *    p, const bbox_t *    bbox )

check box side Checks which side the box is on. Returns 1 if box is totally in front, 0 if partially in front and -1 if totally invisible. Parameters: p  plane bbox  the box Definition at line 142 of file m_plane.cpp. References plane_pointside(), and vec3_c::set().

plane_t plane_frompoints (  const vec3_t    a, const vec3_t    b, const vec3_t    c )

Parameters: a  input vectors Definition at line 53 of file m_plane.cpp. References vec3_c::copy(), vec3_c::cross(), plane_s::d, vec3_c::dot(), plane_s::n, vec3_c::normalize(), and vec3_t. Referenced by landscape_c::create_normals().

float plane_line_intersect (  const vec3_t    a, const vec3_t    b, const plane_t *    p, vec3_t    out )

find intersection Finds the intersection point of a plane and a line. The result is stored in out. The return value is the fraction of the distance between b (1.0) and a (0.0). Parameters: a  start vector b  end vector p  plane to test out  output vector Definition at line 83 of file m_plane.cpp. References vec3_c::copy(), and vec3_t. Referenced by brushface_c::cut().

float plane_pointdist (  const vec3_t    v, const plane_t *    p )

get the distance from a plane Returns the distance of a point from a plane. Parameters: v  point p  plane Definition at line 112 of file m_plane.cpp. References vec3_t. Referenced by brushface_c::cut().

int plane_pointside (  const vec3_t    v, const plane_t *    p )

check which side point is on 1 if in front, 0 if coincident and -1 if behind Parameters: v  point p  plane Definition at line 127 of file m_plane.cpp. References _sgn(), and vec3_t. Referenced by landscape_c::is_node_visible(), and plane_clip_box().

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