Added xatlas as alternative to thekla, forced it on.

Did some hacks to it to avoid it from failing on bad geometry.

4 files changed, 216 insertions, 0 deletions

diff --git a/modules/xatlas_unwrap/SCsub b/modules/xatlas_unwrap/SCsub
new file mode 100644
index 0000000000..9272f5692e
--- /dev/null
+++ b/modules/xatlas_unwrap/SCsub
@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+import platform
+
+Import('env')
+Import('env_modules')
+
+env_xatlas_unwrap = env_modules.Clone()
+
+# Thirdparty source files
+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.Append(CPPPATH=[thirdparty_dir])
+
+    # upstream uses c++11
+    if (not env.msvc):
+         env_xatlas_unwrap.Append(CXXFLAGS="-std=c++11")
+
+    if env["platform"] == 'x11':
+        # if not specifically one of the *BSD, then use LINUX as default
+        if platform.system() == "FreeBSD":
+		    env_xatlas_unwrap.Append(CCFLAGS=["-DNV_OS_FREEBSD", "-DPOSH_COMPILER_GCC"])
+        elif platform.system() == "OpenBSD":
+            env_xatlas_unwrap.Append(CCFLAGS=["-DNV_OS_OPENBSD", "-DPOSH_COMPILER_GCC"])
+        else:
+            env_xatlas_unwrap.Append(CCFLAGS=["-DNV_OS_LINUX", "-DPOSH_COMPILER_GCC"])
+    elif env["platform"] == 'osx':
+        env_xatlas_unwrap.Append(CCFLAGS=["-DNV_OS_DARWIN", "-DPOSH_COMPILER_GCC"])
+    elif env["platform"] == 'windows':
+        if env.msvc:
+            env_xatlas_unwrap.Append(CCFLAGS=["-DNV_OS_WIN32", "-DNV_CC_MSVC", "-DPOSH_COMPILER_MSVC" ])
+        else:
+            env_xatlas_unwrap.Append(CCFLAGS=["-DNV_OS_MINGW", "-DNV_CC_GNUC", "-DPOSH_COMPILER_GCC", "-U__STRICT_ANSI__"])
+            env.Append(LIBS=["dbghelp"])
+
+    env_thirdparty = env_xatlas_unwrap.Clone()
+    env_thirdparty.disable_warnings()
+    env_thirdparty.add_source_files(env.modules_sources, thirdparty_sources)
+
+# Godot source files
+env_xatlas_unwrap.add_source_files(env.modules_sources, "*.cpp")
diff --git a/modules/xatlas_unwrap/config.py b/modules/xatlas_unwrap/config.py
new file mode 100644
index 0000000000..bd092bdc16
--- /dev/null
+++ b/modules/xatlas_unwrap/config.py
@@ -0,0 +1,5 @@
+def can_build(env, platform):
+    return (env['tools'] and platform not in ["android", "ios"])
+
+def configure(env):
+    pass
diff --git a/modules/xatlas_unwrap/register_types.cpp b/modules/xatlas_unwrap/register_types.cpp
new file mode 100644
index 0000000000..9df16aac70
--- /dev/null
+++ b/modules/xatlas_unwrap/register_types.cpp
@@ -0,0 +1,133 @@
+/*************************************************************************/
+/*  register_types.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* 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/error_macros.h"
+#include "thirdparty/xatlas/xatlas.h"
+
+#include <stdio.h>
+#include <stdlib.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, const int *p_face_materials, int p_index_count, 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, const int *p_face_materials, int p_index_count, 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) {
+
+	//set up input mesh
+	xatlas::InputMesh input_mesh;
+	input_mesh.indexData = malloc(sizeof(int) * p_index_count);
+	input_mesh.indexCount = p_index_count;
+	input_mesh.indexFormat = xatlas::IndexFormat::Float; //really xatlas?
+	input_mesh.faceMaterialData = (uint16_t *)malloc(sizeof(uint16_t) * p_index_count);
+
+	for (int i = 0; i < p_index_count; i++) {
+		int *index = (int *)input_mesh.indexData;
+		index[i] = p_indices[i];
+	}
+	for (int i = 0; i < p_index_count / 3; i++) {
+		uint16_t *mat_index = (uint16_t *)input_mesh.faceMaterialData;
+		mat_index[i] = p_face_materials[i];
+	}
+
+	input_mesh.vertexCount = p_vertex_count;
+	input_mesh.vertexPositionData = malloc(sizeof(float) * p_vertex_count * 3);
+	input_mesh.vertexPositionStride = sizeof(float) * 3;
+	input_mesh.vertexNormalData = malloc(sizeof(float) * p_vertex_count * 3);
+	input_mesh.vertexNormalStride = sizeof(float) * 3;
+
+	//material is a better hint than this i guess?
+	input_mesh.vertexUvData = NULL;
+	input_mesh.vertexUvStride = 0;
+
+	for (int i = 0; i < p_vertex_count * 3; i++) {
+		float *vertex_ptr = (float *)input_mesh.vertexPositionData;
+		float *normal_ptr = (float *)input_mesh.vertexNormalData;
+
+		vertex_ptr[i] = p_vertices[i];
+		normal_ptr[i] = p_normals[i];
+	}
+
+	xatlas::CharterOptions chart_options;
+	xatlas::PackerOptions pack_options;
+
+	pack_options.texelArea = 1.0 / p_texel_size;
+	pack_options.quality = 4;
+
+	xatlas::Atlas *atlas = xatlas::Create();
+	printf("adding mesh..\n");
+	xatlas::AddMeshError err = xatlas::AddMesh(atlas, input_mesh);
+	ERR_EXPLAINC(xatlas::StringForEnum(err.code));
+	ERR_FAIL_COND_V(err.code != xatlas::AddMeshErrorCode::Success, false);
+
+	printf("generate..\n");
+	xatlas::Generate(atlas, chart_options, pack_options);
+
+	*r_size_hint_x = xatlas::GetWidth(atlas);
+	*r_size_hint_y = xatlas::GetHeight(atlas);
+
+	float w = *r_size_hint_x;
+	float h = *r_size_hint_y;
+
+	printf("final texsize: %f,%f\n", w, h);
+	const xatlas::OutputMesh *const *output_meshes = xatlas::GetOutputMeshes(atlas);
+
+	const xatlas::OutputMesh *output = output_meshes[0];
+
+	*r_vertex = (int *)malloc(sizeof(int) * output->vertexCount);
+	*r_uv = (float *)malloc(sizeof(float) * output->vertexCount * 2);
+	*r_index = (int *)malloc(sizeof(int) * output->indexCount);
+
+	for (int i = 0; i < output->vertexCount; i++) {
+		(*r_vertex)[i] = output->vertexArray[i].xref;
+		(*r_uv)[i * 2 + 0] = output->vertexArray[i].uv[0];
+		(*r_uv)[i * 2 + 1] = output->vertexArray[i].uv[1];
+	}
+	*r_vertex_count = output->vertexCount;
+
+	for (int i = 0; i < output->indexCount; i++) {
+		(*r_index)[i] = output->indexArray[i];
+	}
+
+	*r_index_count = output->indexCount;
+
+	//xatlas::Destroy(atlas);
+	free((void *)input_mesh.indexData);
+	free((void *)input_mesh.vertexPositionData);
+	free((void *)input_mesh.vertexNormalData);
+	free((void *)input_mesh.faceMaterialData);
+	printf("done");
+	return true;
+}
+
+void register_xatlas_unwrap_types() {
+
+	array_mesh_lightmap_unwrap_callback = xatlas_mesh_lightmap_unwrap_callback;
+}
+
+void unregister_xatlas_unwrap_types() {
+}
diff --git a/modules/xatlas_unwrap/register_types.h b/modules/xatlas_unwrap/register_types.h
new file mode 100644
index 0000000000..fd8d56fa53
--- /dev/null
+++ b/modules/xatlas_unwrap/register_types.h
@@ -0,0 +1,32 @@
+/*************************************************************************/
+/*  register_types.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* 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.                */
+/*************************************************************************/
+
+void register_xatlas_unwrap_types();
+void unregister_xatlas_unwrap_types();