/*
* @brief
*/
static void Cm_LoadBspPlanes(const d_bsp_lump_t *l) {
const d_bsp_plane_t *in = (const void *) (cm_bsp.base + l->file_ofs);
if (l->file_len % sizeof(*in)) {
Com_Error(ERR_DROP, "Funny lump size\n");
}
const int32_t count = l->file_len / sizeof(*in);
if (count < 1) {
Com_Error(ERR_DROP, "Invalid plane count: %d\n", count);
}
if (count > MAX_BSP_PLANES) {
Com_Error(ERR_DROP, "%d > MAX_BSP_PLANES\n", count);
}
cm_bsp_plane_t *out = cm_bsp.planes;
cm_bsp.num_planes = count;
for (int32_t i = 0; i < count; i++, in++, out++) {
for (int32_t 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 = Cm_SignBitsForPlane(out);
out->num = (i >> 1) + 1;
}
}
/*
* @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;
cm_bsp_plane_t *p = r_locals.frustum;
const vec_t fov_x = r_view.fov[0];
const vec_t fov_y = r_view.fov[1];
// rotate r_view.forward right by fov_x degrees
RotatePointAroundVector(r_view.forward, r_view.right, -(90.0 - fov_x), (p++)->normal);
// rotate r_view.forward left by fov_x degrees
RotatePointAroundVector(r_view.forward, r_view.right, 90.0 - fov_x, (p++)->normal);
// rotate r_view.forward up by fov_y degrees
RotatePointAroundVector(r_view.forward, r_view.up, 90.0 - fov_y, (p++)->normal);
// rotate r_view.forward down by fov_y degrees
RotatePointAroundVector(r_view.forward, r_view.up, -(90.0 - fov_y), p->normal);
for (i = 0; i < 4; i++) {
r_locals.frustum[i].type = PLANE_ANY_Z;
r_locals.frustum[i].dist = DotProduct(r_view.origin, r_locals.frustum[i].normal);
r_locals.frustum[i].sign_bits = Cm_SignBitsForPlane(&r_locals.frustum[i]);
}
}
/**
* @brief
*/
static void Cm_LoadBspPlanes(void) {
const int32_t num_planes = cm_bsp.bsp.num_planes;
const bsp_plane_t *in = cm_bsp.bsp.planes;
cm_bsp_plane_t *out = cm_bsp.planes = Mem_TagMalloc(sizeof(cm_bsp_plane_t) * (num_planes + 12), MEM_TAG_CMODEL); // extra for box hull
for (int32_t i = 0; i < num_planes; i++, in++, out++) {
// copied from bsp_
VectorCopy(in->normal, out->normal);
out->dist = in->dist;
out->type = in->type;
// local to cm_
out->sign_bits = Cm_SignBitsForPlane(out);
out->num = (i >> 1) + 1;
}
}