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Implement new CPU lightmapper

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Completely re-write the lightmap generation code:
- Follow the general lightmapper code structure from 4.0.
- Use proper path tracing to compute the global illumination.
- Use atlassing to merge all lightmaps into a single texture (done by @RandomShaper)
- Use OpenImageDenoiser to improve the generated lightmaps.
- Take into account alpha transparency in material textures.
- Allow baking environment lighting.
- Add bicubic lightmap filtering.

There is some minor compatibility breakage in some properties and methods
in BakedLightmap, but lightmaps generated in previous engine versions
should work fine out of the box.

The scene importer has been changed to generate `.unwrap_cache` files
next to the imported scene files. These files *SHOULD* be added to any
version control system as they guarantee there won't be differences when
re-importing the scene from other OSes or engine versions.

This work started as a Google Summer of Code project; Was later funded by IMVU for a good amount of progress;
Was then finished and polished by me on my free time.

Co-authored-by: Pedro J. Estébanez <pedrojrulez@gmail.com>
This commit is contained in:
JFonS
2020-12-19 18:17:22 +01:00
parent a80e4a6158
commit 112b416056
48 changed files with 4981 additions and 1732 deletions
Download Patch File Download Diff File Expand all files Collapse all files

86
editor/plugins/baked_lightmap_editor_plugin.cpp
View File

@@ -30,32 +30,58 @@
#include "baked_lightmap_editor_plugin.h"
void BakedLightmapEditorPlugin::_bake() {
void BakedLightmapEditorPlugin::_bake_select_file(const String &p_file) {
if (lightmap) {
BakedLightmap::BakeError err;
if (get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root() == lightmap) {
err = lightmap->bake(lightmap);
err = lightmap->bake(lightmap, p_file);
} else {
err = lightmap->bake(lightmap->get_parent());
err = lightmap->bake(lightmap->get_parent(), p_file);
}
bake_func_end();
switch (err) {
case BakedLightmap::BAKE_ERROR_NO_SAVE_PATH:
EditorNode::get_singleton()->show_warning(TTR("Can't determine a save path for lightmap images.\nSave your scene (for images to be saved in the same dir), or pick a save path from the BakedLightmap properties."));
break;
case BakedLightmap::BAKE_ERROR_NO_SAVE_PATH: {
String scene_path = lightmap->get_filename();
if (scene_path == String()) {
scene_path = lightmap->get_owner()->get_filename();
}
if (scene_path == String()) {
EditorNode::get_singleton()->show_warning(TTR("Can't determine a save path for lightmap images.\nSave your scene and try again."));
break;
}
scene_path = scene_path.get_basename() + ".lmbake";
file_dialog->set_current_path(scene_path);
file_dialog->popup_centered_ratio();
} break;
case BakedLightmap::BAKE_ERROR_NO_MESHES:
EditorNode::get_singleton()->show_warning(TTR("No meshes to bake. Make sure they contain an UV2 channel and that the 'Bake Light' flag is on."));
break;
case BakedLightmap::BAKE_ERROR_CANT_CREATE_IMAGE:
EditorNode::get_singleton()->show_warning(TTR("Failed creating lightmap images, make sure path is writable."));
break;
case BakedLightmap::BAKE_ERROR_LIGHTMAP_SIZE:
EditorNode::get_singleton()->show_warning(TTR("Failed determining lightmap size. Maximum lightmap size too small?"));
break;
case BakedLightmap::BAKE_ERROR_INVALID_MESH:
EditorNode::get_singleton()->show_warning(TTR("Some mesh is invalid. Make sure the UV2 channel values are conatined within the [0.0,1.0] square region."));
break;
case BakedLightmap::BAKE_ERROR_NO_LIGHTMAPPER:
EditorNode::get_singleton()->show_warning(TTR("Godot editor was built without ray tracing support, lightmaps can't be baked."));
break;
default: {
}
}
}
}
void BakedLightmapEditorPlugin::_bake() {
_bake_select_file("");
}
void BakedLightmapEditorPlugin::edit(Object *p_object) {
BakedLightmap *s = Object::cast_to<BakedLightmap>(p_object);
@@ -81,29 +107,40 @@ void BakedLightmapEditorPlugin::make_visible(bool p_visible) {
}
EditorProgress *BakedLightmapEditorPlugin::tmp_progress = NULL;
EditorProgress *BakedLightmapEditorPlugin::tmp_subprogress = NULL;
void BakedLightmapEditorPlugin::bake_func_begin(int p_steps) {
ERR_FAIL_COND(tmp_progress != NULL);
tmp_progress = memnew(EditorProgress("bake_lightmaps", TTR("Bake Lightmaps"), p_steps, true));
bool BakedLightmapEditorPlugin::bake_func_step(float p_progress, const String &p_description, void *, bool p_force_refresh) {
if (!tmp_progress) {
tmp_progress = memnew(EditorProgress("bake_lightmaps", TTR("Bake Lightmaps"), 1000, true));
ERR_FAIL_COND_V(tmp_progress == nullptr, false);
}
return tmp_progress->step(p_description, p_progress * 1000, p_force_refresh);
}
bool BakedLightmapEditorPlugin::bake_func_step(int p_step, const String &p_description) {
ERR_FAIL_COND_V(tmp_progress == NULL, false);
return tmp_progress->step(p_description, p_step, false);
bool BakedLightmapEditorPlugin::bake_func_substep(float p_progress, const String &p_description, void *, bool p_force_refresh) {
if (!tmp_subprogress) {
tmp_subprogress = memnew(EditorProgress("bake_lightmaps_substep", "", 1000, true));
ERR_FAIL_COND_V(tmp_subprogress == nullptr, false);
}
return tmp_subprogress->step(p_description, p_progress * 1000, p_force_refresh);
}
void BakedLightmapEditorPlugin::bake_func_end() {
ERR_FAIL_COND(tmp_progress == NULL);
memdelete(tmp_progress);
tmp_progress = NULL;
if (tmp_progress != nullptr) {
memdelete(tmp_progress);
tmp_progress = nullptr;
}
if (tmp_subprogress != nullptr) {
memdelete(tmp_subprogress);
tmp_subprogress = nullptr;
}
}
void BakedLightmapEditorPlugin::_bind_methods() {
ClassDB::bind_method("_bake", &BakedLightmapEditorPlugin::_bake);
ClassDB::bind_method("_bake_select_file", &BakedLightmapEditorPlugin::_bake_select_file);
}
BakedLightmapEditorPlugin::BakedLightmapEditorPlugin(EditorNode *p_node) {
@@ -114,12 +151,19 @@ BakedLightmapEditorPlugin::BakedLightmapEditorPlugin(EditorNode *p_node) {
bake->set_text(TTR("Bake Lightmaps"));
bake->hide();
bake->connect("pressed", this, "_bake");
file_dialog = memnew(EditorFileDialog);
file_dialog->set_mode(EditorFileDialog::MODE_SAVE_FILE);
file_dialog->add_filter("*.lmbake ; LightMap Bake");
file_dialog->set_title(TTR("Select lightmap bake file:"));
file_dialog->connect("file_selected", this, "_bake_select_file");
bake->add_child(file_dialog);
add_control_to_container(CONTAINER_SPATIAL_EDITOR_MENU, bake);
lightmap = NULL;
BakedLightmap::bake_begin_function = bake_func_begin;
BakedLightmap::bake_step_function = bake_func_step;
BakedLightmap::bake_end_function = bake_func_end;
BakedLightmap::bake_substep_function = bake_func_substep;
}
BakedLightmapEditorPlugin::~BakedLightmapEditorPlugin() {