/*
* R_LoadBspPlanes
*/
static void R_LoadBspPlanes(const d_bsp_lump_t *l) {
int i, j;
c_bsp_plane_t *out;
const d_bsp_plane_t *in;
int count;
in = (const void *) (mod_base + l->file_ofs);
if (l->file_len % sizeof(*in)) {
Com_Error(ERR_DROP, "R_LoadBspPlanes: Funny lump size in %s.",
r_load_model->name);
}
count = l->file_len / sizeof(*in);
out = R_HunkAlloc(count * 2 * sizeof(*out));
r_load_model->planes = out;
r_load_model->num_planes = count;
for (i = 0; i < count; i++, in++, out++) {
for (j = 0; j < 3; j++) {
out->normal[j] = LittleFloat(in->normal[j]);
}
out->dist = LittleFloat(in->dist);
out->type = LittleLong(in->type);
out->sign_bits = SignBitsForPlane(out);
}
}
/*
* @brief Updates the clipping planes for the view frustum based on the origin
* and angles for this frame.
*/
void R_UpdateFrustum(void) {
int32_t i;
if (!r_cull->value)
return;
// rotate r_view.forward right by fov_x / 2 degrees
RotatePointAroundVector(r_locals.frustum[0].normal, r_view.up, r_view.forward,
-(90 - r_view.fov[0] / 2));
// rotate r_view.forward left by fov_x / 2 degrees
RotatePointAroundVector(r_locals.frustum[1].normal, r_view.up, r_view.forward,
90 - r_view.fov[0] / 2);
// rotate r_view.forward up by fov_x / 2 degrees
RotatePointAroundVector(r_locals.frustum[2].normal, r_view.right, r_view.forward,
90 - r_view.fov[1] / 2);
// rotate r_view.forward down by fov_x / 2 degrees
RotatePointAroundVector(r_locals.frustum[3].normal, r_view.right, r_view.forward,
-(90 - r_view.fov[1] / 2));
for (i = 0; i < 4; i++) {
r_locals.frustum[i].type = PLANE_ANYZ;
r_locals.frustum[i].dist = DotProduct(r_view.origin, r_locals.frustum[i].normal);
r_locals.frustum[i].sign_bits = SignBitsForPlane(&r_locals.frustum[i]);
}
}
/*
* @brief
*/
static void R_LoadBspPlanes(r_bsp_model_t *bsp, const d_bsp_lump_t *l) {
int32_t i, j;
c_bsp_plane_t *out;
const d_bsp_plane_t *in;
int32_t count;
in = (const void *) (mod_base + l->file_ofs);
if (l->file_len % sizeof(*in)) {
Com_Error(ERR_DROP, "Funny lump size\n");
}
count = l->file_len / sizeof(*in);
out = Z_LinkMalloc(count * 2 * sizeof(*out), bsp);
bsp->planes = out;
bsp->num_planes = count;
for (i = 0; i < count; i++, in++, out++) {
for (j = 0; j < 3; j++) {
out->normal[j] = LittleFloat(in->normal[j]);
}
out->dist = LittleFloat(in->dist);
out->type = LittleLong(in->type);
out->sign_bits = SignBitsForPlane(out);
}
}
