static box_t get_box(const vec3_t *p0, const vec3_t *p1, const vec3_t *n,
float r, const plane_t *plane)
{
mat4_t rot;
box_t box;
if (p1 == NULL) {
box = bbox_from_extents(*p0, r, r, r);
box = box_swap_axis(box, 2, 0, 1);
return box;
}
if (r == 0) {
box = bbox_grow(bbox_from_points(*p0, *p1), 0.5, 0.5, 0.5);
// Apply the plane rotation.
rot = plane->mat;
rot.vecs[3] = vec4(0, 0, 0, 1);
mat4_imul(&box.mat, rot);
return box;
}
// Create a box for a line:
int i;
const vec3_t AXES[] = {vec3(1, 0, 0), vec3(0, 1, 0), vec3(0, 0, 1)};
box.mat = mat4_identity;
box.p = vec3_mix(*p0, *p1, 0.5);
box.d = vec3_sub(*p1, box.p);
for (i = 0; i < 3; i++) {
box.w = vec3_cross(box.d, AXES[i]);
if (vec3_norm2(box.w) > 0) break;
}
if (i == 3) return box;
box.w = vec3_mul(vec3_normalized(box.w), r);
box.h = vec3_mul(vec3_normalized(vec3_cross(box.d, box.w)), r);
return box;
}
static void do_move(layer_t *layer, const float mat[4][4])
{
float m[4][4];
mat4_set_identity(m);
// Change referential to the mesh origin.
// XXX: maybe this should be done in mesh_move directy??
mat4_itranslate(m, -0.5, -0.5, -0.5);
mat4_imul(m, mat);
mat4_itranslate(m, +0.5, +0.5, +0.5);
if (layer->base_id || layer->image) {
mat4_mul(mat, layer->mat, layer->mat);
layer->base_mesh_key = 0;
} else {
mesh_move(layer->mesh, m);
if (!box_is_null(layer->box)) {
mat4_mul(mat, layer->box, layer->box);
box_get_bbox(layer->box, layer->box);
}
}
goxel_update_meshes(goxel, -1);
}
