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light: define a plane_t structure and use for lightinfo_t 

Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
This commit is contained in:
Kevin Shanahan 2013-03-09 15:58:26 +10:30
parent fda3b230f9
commit 63393eee8e
1 changed files with 26 additions and 19 deletions
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45
light/ltface.c
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@ -137,9 +137,14 @@ Solve3(const pmatrix3_t *matrix, const vec3_t rhs, vec3_t out)
typedef struct {
pmatrix3_t transform;
const texinfo_t *texinfo;
vec_t facedist;
vec_t planedist;
} texorg_t;
typedef struct {
vec3_t normal;
vec_t dist;
} plane_t;
/* Allow space for 4x4 oversampling */
#define SINGLEMAP (18*18*4*4)
@ -149,8 +154,7 @@ typedef struct {
vec_t exactmid[2];
int texmins[2], texsize[2];
vec_t facedist;
vec3_t facenormal;
plane_t plane;
int numsurfpt;
vec3_t surfpt[SINGLEMAP];
@ -200,7 +204,7 @@ TexCoordToWorld(vec_t s, vec_t t, const texorg_t *texorg, vec3_t world)
rhs[0] = s - texorg->texinfo->vecs[0][3];
rhs[1] = t - texorg->texinfo->vecs[1][3];
rhs[2] = texorg->facedist + 1; /* one "unit" in front of surface */
rhs[2] = texorg->planedist + 1; /* one "unit" in front of surface */
Solve3(&texorg->transform, rhs, world);
}
@ -464,7 +468,7 @@ SingleLightFace(const entity_t *light, lightinfo_t *l, const vec3_t colors)
vec_t newlightmap[SINGLEMAP];
vec3_t newcolormap[SINGLEMAP];
dist = DotProduct(light->origin, l->facenormal) - l->facedist;
dist = DotProduct(light->origin, l->plane.normal) - l->plane.dist;
/* don't bother with lights behind the surface */
if (dist < 0)
@ -515,7 +519,7 @@ SingleLightFace(const entity_t *light, lightinfo_t *l, const vec3_t colors)
/* Check spotlight cone */
VectorScale(ray, 1.0 / dist, ray);
angle = DotProduct(ray, l->facenormal);
angle = DotProduct(ray, l->plane.normal);
spotscale = 1;
if (light->spotlight) {
vec_t falloff = DotProduct(light->spotvec, ray);
@ -580,7 +584,7 @@ SkyLightFace(lightinfo_t *l, const vec3_t colors)
vec3_t *colormap;
/* Don't bother if surface facing away from sun */
if (DotProduct(sunvec, l->facenormal) < -ANGLE_EPSILON)
if (DotProduct(sunvec, l->plane.normal) < -ANGLE_EPSILON)
return;
/* if sunlight is set, use a style 0 light map */
@ -599,7 +603,7 @@ SkyLightFace(lightinfo_t *l, const vec3_t colors)
/* Check each point... */
VectorCopy(sunvec, incoming);
VectorNormalize(incoming);
angle = DotProduct(incoming, l->facenormal);
angle = DotProduct(incoming, l->plane.normal);
angle = (1.0 - scalecos) + scalecos * angle;
#if 0
@ -610,7 +614,7 @@ SkyLightFace(lightinfo_t *l, const vec3_t colors)
vec3_t sun_vectors[5];
// Try to hit parallel surfaces?
oldangle = DotProduct(incoming, l->facenormal);
oldangle = DotProduct(incoming, l->plane.normal);
if (oldangle < ANGLE_EPSILON) {
printf("real small angle! (%f)\n", oldangle);
angle = (1.0 - scalecos) + scalecos * ANGLE_EPSILON;
@ -826,6 +830,7 @@ LightFace(int surfnum, const modelinfo_t *modelinfo)
{
const entity_t *entity;
dface_t *face;
plane_t *plane;
lightinfo_t l;
int s, t;
int i, j, k, c;
@ -842,7 +847,7 @@ LightFace(int surfnum, const modelinfo_t *modelinfo)
vec3_t colors = { 0, 0, 0 };
int width;
vec3_t point;
vec3_t planepoint;
texorg_t texorg;
@ -859,21 +864,23 @@ LightFace(int surfnum, const modelinfo_t *modelinfo)
memset(&l, 0, sizeof(l));
l.modelinfo = modelinfo;
/* rotate plane */
VectorCopy(dplanes[face->planenum].normal, l.facenormal);
l.facedist = dplanes[face->planenum].dist;
VectorScale(l.facenormal, l.facedist, point);
VectorAdd(point, modelinfo->offset, point);
l.facedist = DotProduct(point, l.facenormal);
/* Offset the plane according to the model offset */
plane = &l.plane;
VectorCopy(dplanes[face->planenum].normal, plane->normal);
plane->dist = dplanes[face->planenum].dist;
VectorScale(plane->normal, plane->dist, planepoint);
VectorAdd(planepoint, modelinfo->offset, planepoint);
plane->dist = DotProduct(plane->normal, planepoint);
/* flip if needed */
if (face->side) {
VectorSubtract(vec3_origin, l.facenormal, l.facenormal);
l.facedist = -l.facedist;
VectorSubtract(vec3_origin, plane->normal, plane->normal);
plane->dist = -plane->dist;
}
CreateFaceTransform(face, &texorg.transform);
texorg.texinfo = &texinfo[face->texinfo];
texorg.facedist = l.facedist;
texorg.planedist = plane->dist;
CalcFaceExtents(face, modelinfo->offset, &l);
CalcPoints(modelinfo->model, &texorg, &l);