initial commit, 4.5 stable

modules/xatlas_unwrap/SCsub

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+from misc.utility.scons_hints import *
+
+Import("env")
+Import("env_modules")
+
+env_xatlas_unwrap = env_modules.Clone()
+
+# Thirdparty source files
+
+thirdparty_obj = []
+
+if env["builtin_xatlas"]:
+    thirdparty_dir = "#thirdparty/xatlas/"
+    thirdparty_sources = [
+        "xatlas.cpp",
+    ]
+    thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
+
+    env_xatlas_unwrap.Prepend(CPPEXTPATH=[thirdparty_dir])
+
+    env_thirdparty = env_xatlas_unwrap.Clone()
+    env_thirdparty.disable_warnings()
+    env_thirdparty.add_source_files(thirdparty_obj, thirdparty_sources)
+    env.modules_sources += thirdparty_obj
+
+
+# Godot source files
+
+module_obj = []
+
+env_xatlas_unwrap.add_source_files(module_obj, "*.cpp")
+env.modules_sources += module_obj
+
+# Needed to force rebuilding the module files when the thirdparty library is updated.
+env.Depends(module_obj, thirdparty_obj)

modules/xatlas_unwrap/config.py

@@ -0,0 +1,6 @@
+def can_build(env, platform):
+    return env.editor_build
+
+
+def configure(env):
+    pass

modules/xatlas_unwrap/register_types.cpp

@@ -0,0 +1,239 @@
+/**************************************************************************/
+/*  register_types.cpp                                                    */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "register_types.h"
+
+#include "core/crypto/crypto_core.h"
+
+#include <xatlas.h>
+
+extern bool (*array_mesh_lightmap_unwrap_callback)(float p_texel_size, const float *p_vertices, const float *p_normals, int p_vertex_count, const int *p_indices, int p_index_count, const uint8_t *p_cache_data, bool *r_use_cache, uint8_t **r_mesh_cache, int *r_mesh_cache_size, float **r_uv, int **r_vertex, int *r_vertex_count, int **r_index, int *r_index_count, int *r_size_hint_x, int *r_size_hint_y);
+
+bool xatlas_mesh_lightmap_unwrap_callback(float p_texel_size, const float *p_vertices, const float *p_normals, int p_vertex_count, const int *p_indices, int p_index_count, const uint8_t *p_cache_data, bool *r_use_cache, uint8_t **r_mesh_cache, int *r_mesh_cache_size, float **r_uv, int **r_vertex, int *r_vertex_count, int **r_index, int *r_index_count, int *r_size_hint_x, int *r_size_hint_y) {
+	CryptoCore::MD5Context ctx;
+	ctx.start();
+
+	ctx.update((unsigned char *)&p_texel_size, sizeof(float));
+	ctx.update((unsigned char *)p_indices, sizeof(int) * p_index_count);
+	ctx.update((unsigned char *)p_vertices, sizeof(float) * p_vertex_count * 3);
+	ctx.update((unsigned char *)p_normals, sizeof(float) * p_vertex_count * 3);
+
+	unsigned char hash[16];
+	ctx.finish(hash);
+
+	bool cached = false;
+	unsigned int cache_idx = 0;
+
+	*r_mesh_cache = nullptr;
+	*r_mesh_cache_size = 0;
+
+	if (p_cache_data) {
+		//Check if hash is in cache data
+		int *cache_data = (int *)p_cache_data;
+		int n_entries = cache_data[0];
+		unsigned int read_idx = 1;
+		for (int i = 0; i < n_entries; ++i) {
+			if (memcmp(&cache_data[read_idx], hash, 16) == 0) {
+				cached = true;
+				cache_idx = read_idx;
+				break;
+			}
+
+			read_idx += 4; // hash
+			read_idx += 2; // size hint
+
+			int vertex_count = cache_data[read_idx];
+			read_idx += 1; // vertex count
+			read_idx += vertex_count; // vertex
+			read_idx += vertex_count * 2; // uvs
+
+			int index_count = cache_data[read_idx];
+			read_idx += 1; // index count
+			read_idx += index_count; // indices
+		}
+	}
+
+	if (cached) {
+		int *cache_data = (int *)p_cache_data;
+
+		cache_idx += 4;
+
+		// Load size
+		*r_size_hint_x = cache_data[cache_idx];
+		*r_size_hint_y = cache_data[cache_idx + 1];
+		cache_idx += 2;
+
+		// Load vertices
+		*r_vertex_count = cache_data[cache_idx];
+		cache_idx++;
+		*r_vertex = &cache_data[cache_idx];
+		cache_idx += *r_vertex_count;
+
+		// Load UVs
+		*r_uv = (float *)&cache_data[cache_idx];
+		cache_idx += *r_vertex_count * 2;
+
+		// Load indices
+		*r_index_count = cache_data[cache_idx];
+		cache_idx++;
+		*r_index = &cache_data[cache_idx];
+	} else {
+		// set up input mesh
+		xatlas::MeshDecl input_mesh;
+		input_mesh.indexData = p_indices;
+		input_mesh.indexCount = p_index_count;
+		input_mesh.indexFormat = xatlas::IndexFormat::UInt32;
+
+		input_mesh.vertexCount = p_vertex_count;
+		input_mesh.vertexPositionData = p_vertices;
+		input_mesh.vertexPositionStride = sizeof(float) * 3;
+		input_mesh.vertexNormalData = p_normals;
+		input_mesh.vertexNormalStride = sizeof(uint32_t) * 3;
+		input_mesh.vertexUvData = nullptr;
+		input_mesh.vertexUvStride = 0;
+
+		xatlas::ChartOptions chart_options;
+		chart_options.fixWinding = true;
+
+		ERR_FAIL_COND_V_MSG(p_texel_size <= 0.0f, false, "Texel size must be greater than 0.");
+
+		xatlas::PackOptions pack_options;
+		pack_options.padding = 1;
+		pack_options.maxChartSize = 4094; // Lightmap atlassing needs 2 for padding between meshes, so 4096-2
+		pack_options.blockAlign = true;
+		pack_options.texelsPerUnit = 1.0 / p_texel_size;
+
+		xatlas::Atlas *atlas = xatlas::Create();
+
+		xatlas::AddMeshError err = xatlas::AddMesh(atlas, input_mesh, 1);
+		ERR_FAIL_COND_V_MSG(err != xatlas::AddMeshError::Success, false, xatlas::StringForEnum(err));
+
+		xatlas::Generate(atlas, chart_options, pack_options);
+
+		*r_size_hint_x = atlas->width;
+		*r_size_hint_y = atlas->height;
+
+		float w = *r_size_hint_x;
+		float h = *r_size_hint_y;
+
+		if (w == 0 || h == 0) {
+			xatlas::Destroy(atlas);
+			return false; //could not bake because there is no area
+		}
+
+		const xatlas::Mesh &output = atlas->meshes[0];
+
+		*r_vertex = (int *)memalloc(sizeof(int) * output.vertexCount);
+		ERR_FAIL_NULL_V_MSG(*r_vertex, false, "Out of memory.");
+		*r_uv = (float *)memalloc(sizeof(float) * output.vertexCount * 2);
+		ERR_FAIL_NULL_V_MSG(*r_uv, false, "Out of memory.");
+		*r_index = (int *)memalloc(sizeof(int) * output.indexCount);
+		ERR_FAIL_NULL_V_MSG(*r_index, false, "Out of memory.");
+
+		float max_x = 0;
+		float max_y = 0;
+		for (uint32_t i = 0; i < output.vertexCount; i++) {
+			(*r_vertex)[i] = output.vertexArray[i].xref;
+			(*r_uv)[i * 2 + 0] = output.vertexArray[i].uv[0] / w;
+			(*r_uv)[i * 2 + 1] = output.vertexArray[i].uv[1] / h;
+			max_x = MAX(max_x, output.vertexArray[i].uv[0]);
+			max_y = MAX(max_y, output.vertexArray[i].uv[1]);
+		}
+
+		*r_vertex_count = output.vertexCount;
+
+		for (uint32_t i = 0; i < output.indexCount; i++) {
+			(*r_index)[i] = output.indexArray[i];
+		}
+
+		*r_index_count = output.indexCount;
+
+		xatlas::Destroy(atlas);
+	}
+
+	if (*r_use_cache) {
+		// Build cache data for current mesh
+
+		unsigned int new_cache_size = 4 + 2 + 1 + *r_vertex_count + (*r_vertex_count * 2) + 1 + *r_index_count; // hash + size hint + vertex_count + vertices + uvs + index_count + indices
+		new_cache_size *= sizeof(int);
+		int *new_cache_data = (int *)memalloc(new_cache_size);
+		unsigned int new_cache_idx = 0;
+
+		// hash
+		memcpy(&new_cache_data[new_cache_idx], hash, 16);
+		new_cache_idx += 4;
+
+		// size hint
+		new_cache_data[new_cache_idx] = *r_size_hint_x;
+		new_cache_data[new_cache_idx + 1] = *r_size_hint_y;
+		new_cache_idx += 2;
+
+		// vertex count
+		new_cache_data[new_cache_idx] = *r_vertex_count;
+		new_cache_idx++;
+
+		// vertices
+		memcpy(&new_cache_data[new_cache_idx], *r_vertex, sizeof(int) * (*r_vertex_count));
+		new_cache_idx += *r_vertex_count;
+
+		// uvs
+		memcpy(&new_cache_data[new_cache_idx], *r_uv, sizeof(float) * (*r_vertex_count) * 2);
+		new_cache_idx += *r_vertex_count * 2;
+
+		// index count
+		new_cache_data[new_cache_idx] = *r_index_count;
+		new_cache_idx++;
+
+		// indices
+		memcpy(&new_cache_data[new_cache_idx], *r_index, sizeof(int) * (*r_index_count));
+
+		// Return cache data to the caller
+		*r_mesh_cache = (uint8_t *)new_cache_data;
+		*r_mesh_cache_size = new_cache_size;
+	}
+
+	*r_use_cache = cached; // Return whether cache was used.
+
+	return true;
+}
+
+void initialize_xatlas_unwrap_module(ModuleInitializationLevel p_level) {
+	if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
+		return;
+	}
+
+	array_mesh_lightmap_unwrap_callback = xatlas_mesh_lightmap_unwrap_callback;
+}
+
+void uninitialize_xatlas_unwrap_module(ModuleInitializationLevel p_level) {
+	if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
+		return;
+	}
+}

modules/xatlas_unwrap/register_types.h

@@ -0,0 +1,36 @@
+/**************************************************************************/
+/*  register_types.h                                                      */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "modules/register_module_types.h"
+
+void initialize_xatlas_unwrap_module(ModuleInitializationLevel p_level);
+void uninitialize_xatlas_unwrap_module(ModuleInitializationLevel p_level);