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light: move private BSP tracing stuff from light.h to trace.c

This commit is contained in:
Eric Wasylishen 2016-05-11 16:22:30 -06:00
parent 1ed000cbde
commit 7bd93cce37
2 changed files with 48 additions and 49 deletions
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49
include/light/light.h
View File

@ -46,55 +46,6 @@ typedef struct {
vec_t dist;
} plane_t;
typedef struct traceinfo_s {
vec3_t point;
const bsp2_dface_t *face;
plane_t hitplane;
/* returns true if sky was hit. */
bool hitsky;
bool hitback;
// internal
vec3_t dir;
} traceinfo_t;
/* Stopped by solid and sky */
bool TraceFaces (traceinfo_t *ti, int node, const vec3_t start, const vec3_t end);
typedef struct {
const dplane_t *dplane;
int side;
vec3_t point;
} tracepoint_t;
/*
* ---------
* TraceLine
* ---------
* Generic BSP model ray tracing function. Traces a ray from start towards
* stop. If the trace line hits one of the flagged contents along the way, the
* corresponding TRACE flag will be returned. Furthermore, if hitpoint is
* non-null, information about the point the ray hit will be filled in.
*
* model - The bsp model to trace against
* flags - contents which will stop the trace (must be > 0)
* start - coordinates to start trace
* stop - coordinates to end the trace
* hitpoint - filled in if result > 0 and hitpoint is non-NULL
*
* TraceLine will return a negative traceflag if the point 'start' resides
* inside a leaf with one of the contents types which stop the trace.
*
* ericw -- note, this should only be used for testing occlusion.
* the hitpoint is not accurate, imagine a solid cube floating in a room,
* only one of the 6 sides will be a node with a solid leaf child.
* Yet, which side is the node with the solid leaf child determines
* what the hit point will be.
*/
int TraceLine(const dmodel_t *model, const int traceflags,
const vec3_t start, const vec3_t end, tracepoint_t *hitpoint);
/*
* Convenience functions TestLight and TestSky will test against all shadow
* casting bmodels and self-shadow the model 'self' if self != NULL. Returns

48
light/trace.c
View File

@ -19,6 +19,54 @@
#include <light/light.h>
typedef struct traceinfo_s {
vec3_t point;
const bsp2_dface_t *face;
plane_t hitplane;
/* returns true if sky was hit. */
bool hitsky;
bool hitback;
// internal
vec3_t dir;
} traceinfo_t;
/* Stopped by solid and sky */
bool TraceFaces (traceinfo_t *ti, int node, const vec3_t start, const vec3_t end);
typedef struct {
const dplane_t *dplane;
int side;
vec3_t point;
} tracepoint_t;
/*
* ---------
* TraceLine
* ---------
* Generic BSP model ray tracing function. Traces a ray from start towards
* stop. If the trace line hits one of the flagged contents along the way, the
* corresponding TRACE flag will be returned. Furthermore, if hitpoint is
* non-null, information about the point the ray hit will be filled in.
*
* model - The bsp model to trace against
* flags - contents which will stop the trace (must be > 0)
* start - coordinates to start trace
* stop - coordinates to end the trace
* hitpoint - filled in if result > 0 and hitpoint is non-NULL
*
* TraceLine will return a negative traceflag if the point 'start' resides
* inside a leaf with one of the contents types which stop the trace.
*
* ericw -- note, this should only be used for testing occlusion.
* the hitpoint is not accurate, imagine a solid cube floating in a room,
* only one of the 6 sides will be a node with a solid leaf child.
* Yet, which side is the node with the solid leaf child determines
* what the hit point will be.
*/
int TraceLine(const dmodel_t *model, const int traceflags,
const vec3_t start, const vec3_t end, tracepoint_t *hitpoint);
typedef struct tnode_s {
vec3_t normal;
vec_t dist;