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This commit is contained in:
Segey Lapin
178
modules/world/world_terrain_lod.cpp
Normal file
178
modules/world/world_terrain_lod.cpp
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#include <core/hash_map.h>
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#include <core/math/vector3.h>
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#include <scene/resources/packed_scene.h>
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#include <scene/resources/primitive_meshes.h>
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#include <scene/3d/mesh_instance.h>
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#include "direct_lod_multimesh.h"
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#include "world_chunk.h"
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#include "terrain_object.h"
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#include "world_terrain_lod.h"
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void WorldTerrainLod::init_lod(int mind, int maxd,
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float density_range)
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{
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int i;
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min_dist = mind;
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max_dist = maxd;
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this->density_range = density_range;
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}
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void WorldTerrainLod::update()
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{
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}
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void WorldTerrainLod::create_chunk(const WorldChunk *chunk, const List<TerrainObject> &obj_list)
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{
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int i, j, id;
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if (mesh_h.has(chunk->get_loc()))
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return;
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int lod_offset = 1 << chunk->get_lod();
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int obj_count = obj_list.size();
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printf("create_chunk started %d\n", obj_count);
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LodMultiMesh3D *mi = memnew(LodMultiMesh3D);
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id = 0;
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int rcount = chunk->get_transforms_count() / lod_offset;
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const Transform *xfptr = chunk->get_transforms();
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const float *variances = chunk->get_variance();
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Vector<int> ids;
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ids.resize(rcount);
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printf("ids size: %d rcount: %d\n", ids.size(), rcount);
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HashMap<int, List<Transform> > instances;
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for (j = 0; j < rcount; j++) {
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float variance = variances[j * lod_offset];
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int obj_id = (int)(variance * obj_count);
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printf("3 %d %d", j, rcount);
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ids.write[j] = obj_id;
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if (!instances.has(obj_id))
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instances[obj_id] = List<Transform>();
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instances[obj_id].push_back(xfptr[j * lod_offset]);
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printf("6");
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}
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const List<TerrainObject>::Element *e = obj_list.front();
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int count = 0;
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while (e) {
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printf("obj: %d\n", count);
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const TerrainObject *obj = &e->get();
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if (!instances.has(count))
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instances[count] = List<Transform>();
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Ref<Mesh> mesh = obj->get_mesh(chunk->get_lod());
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printf("lod: %d mesh: %p, instance count: %d\n", chunk->get_lod(), mesh.ptr(), instances[count].size());
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mi->add_mesh(obj->get_mesh(chunk->get_lod()));
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mi->set_instance_count(count, instances[count].size());
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const List<Transform>::Element *ep = instances[count].front();
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int pcount = 0;
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while (ep) {
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const Transform &pxform = ep->get();
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printf("ep %d %d %ls\n", count, pcount, String(pxform.origin).c_str());
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mi->set_instance_transform(count, pcount++, pxform);
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ep = ep->next();
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}
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e = e->next();
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count++;
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}
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#if 0
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for (j = 0; j < mesh_grass.size(); j++) {
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if (!new_points[*org].has(j))
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continue;
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const List<struct new_point> &nps = new_points[*org][j];
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mi->add_mesh(mesh_grass[j]);
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mi->set_instance_count(id, nps.size());
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const List<struct new_point>::Element *e = nps.front();
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int icount = 0;
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while(e) {
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mi->set_instance_transform(id, icount++, e->get().xform);
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e = e->next();
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}
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id++;
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}
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#endif
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mi->hide();
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mi->set_world(NULL);
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mi->set_global_transform(Transform(Basis(), chunk->get_loc().to_vec3()));
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meshes.push_back(mi);
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mesh_h[chunk->get_loc()] = mi;
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mi->set_world(gworld.ptr());
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mi->show();
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}
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void WorldTerrainLod::cleanup(const Transform &vxform)
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{
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if (meshes.size() > 0)
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printf("meshes.size() %p %d\n", this, meshes.size());
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List<LodMultiMesh3D *>::Element *e = meshes.front();
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while(e) {
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LodMultiMesh3D *ve = e->get();
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List<LodMultiMesh3D *>::Element *ne = e->next();
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Vector3 rpos = ve->get_center();
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Vector3 vpos = vxform.origin;
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Vector3i loc(ve->get_global_transform().origin);
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if (!valid_org(vxform, ve->get_global_transform().origin, 0.5f)) {
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memfree(ve);
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meshes.erase(e);
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mesh_h.erase(loc);
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}
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e = ne;
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}
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}
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static inline bool too_close(const Transform &vxform, const Vector3 &org, float zmin)
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{
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Vector3 lpoint = vxform.xform_inv(org);
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if (-lpoint.z < zmin)
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return true;
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return false;
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}
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bool WorldTerrainLod::valid_org(const Transform &vxform, const Vector3 &org, float margin) const
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{
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bool ret = true;
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float view_angle = M_PI / 3.0f;
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float view_s = Math::sin(view_angle);
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if (too_close(vxform, org, min_dist))
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return false;
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// if (vxform.origin.distance_squared_to(org) > max_dist * max_dist)
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// return false;
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//if (min_dist > 0 && vxform.origin.distance_squared_to(org) < min_dist * min_dist)
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// return false;
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Vector3 lpoint = vxform.xform_inv(org);
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/* View is in -Z direction */
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if (lpoint.z > -min_dist + margin || lpoint.z < -max_dist - margin)
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ret = false;
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if (lpoint.x < -view_s * max_dist -8.0f - margin|| lpoint.x > view_s * max_dist + 8.0f + margin)
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ret = false;
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if (lpoint.y < -36.0f || lpoint.y > 36.0f)
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ret = false;
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return ret;
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}
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void WorldTerrainLod::update_visibility(const Transform &vxform)
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{
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List<LodMultiMesh3D *>::Element *e = meshes.front();
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while(e) {
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LodMultiMesh3D *mi = e->get();
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Transform xform = mi->get_global_transform();
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// Vector3 lpoint = vxform.xform_inv(xform.origin);
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if (mi->is_visible() && !valid_org(vxform, xform.origin, 1.0f)) {
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mi->hide();
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mi->set_world(NULL);
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} else if (!mi->is_visible() && valid_org(vxform, xform.origin, 0.0f)) {
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mi->show();
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mi->set_world(gworld.ptr());
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}
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e = e->next();
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}
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}
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void WorldTerrainLod::set_world(Ref<World> world)
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{
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if (!world.ptr())
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printf("exited world %p\n", gworld.ptr());
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gworld = world;
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List<LodMultiMesh3D *>::Element *e = meshes.front();
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while(e) {
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LodMultiMesh3D *mi = e->get();
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mi->set_world(gworld.ptr());
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e = e->next();
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}
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if (gworld.ptr())
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printf("entered world %p\n", gworld.ptr());
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}
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