ml: Get Asset Importer loading the model.

pyproject.toml

@@ -1,9 +1,9 @@
 [tool.pyright]
 
-include = [ 
+include = [
-    "*.py", 
+    "*.py",
-    "renpy/", 
+    "renpy/",
-    "module/" 
+    "src/"
 ]
 
 exclude = [
@@ -21,3 +21,28 @@ reportOptionalIterable = false
 reportOptionalContextManager = false
 reportOptionalOperand = false
 reportMissingModuleSource = false
+
+
+[tool.cyright]
+include = [
+    "*.py",
+    "renpy/",
+    "src/"
+]
+
+exclude = [
+    "module/build/",
+]
+
+ignore = [
+    "renpycoverage.py"
+]
+
+reportGeneralTypeIssues = false
+reportOptionalSubscript = false
+reportOptionalMemberAccess = false
+reportOptionalCall = false
+reportOptionalIterable = false
+reportOptionalContextManager = false
+reportOptionalOperand = false
+reportMissingModuleSource = false

renpy/gl2/modelloader.pyx

@@ -0,0 +1,39 @@
+# Copyright 2004-2025 Tom Rothamel <pytom@bishoujo.us>
+#
+# 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.
+
+from assimp cimport (
+    Importer, aiProcessPreset_TargetRealtime_Quality, aiProcess_ConvertToLeftHanded, aiProcess_FlipUVs, aiScene,
+    aiMesh, aiMatrix4x4
+)
+
+cdef class Loader:
+
+    cdef Importer importer
+    cdef const aiScene *scene
+
+    def load(self, filename: str) -> None:
+        cdef const aiScene *scene
+
+        filename_bytes = filename.encode()
+        self.scene = self.importer.ReadFile(filename_bytes, aiProcessPreset_TargetRealtime_Quality | aiProcess_ConvertToLeftHanded | aiProcess_FlipUVs) # type: ignore
+
+        if not self.scene:
+            raise Exception("Error loading %s: %s" % (filename, self.importer.GetErrorString()))

setup.py

@@ -80,6 +80,11 @@ def main():
     if cubism:
         setuplib.include_dirs.append("{}/Core/include".format(cubism))
 
+    assimp = "RENPY_USE_ASSIMP" in os.environ
+    if assimp:
+        pkgconfig_packages = "assimp\n" + pkgconfig_packages
+        library("assimp")
+
     # src/ directory.
     cython("_renpy", [ "src/IMG_savepng.c", "src/core.c" ])
     cython("_renpybidi", [ "src/renpybidicore.c" ])
@@ -129,6 +134,9 @@ def main():
     if cubism:
         cython("renpy.gl2.live2dmodel")
 
+    if assimp:
+        cython("renpy.gl2.modelloader", language="c++")
+
     # renpy.text
     cython("renpy.text.textsupport")
     cython("renpy.text.texwrap")

src/assimp.pxd

@@ -0,0 +1,103 @@
+cdef extern from "assimp/vector2.h":
+    cdef struct aiVector2D:
+        float x
+        float y
+
+cdef extern from "assimp/vector3.h":
+    cdef struct aiVector3D:
+        float x
+        float y
+        float z
+
+cdef extern from "assimp/matrix4x4.h":
+    cdef struct aiMatrix4x4:
+        float a1, a2, a3, a4
+        float b1, b2, b3, b4
+        float c1, c2, c3, c4
+        float d1, d2, d3, d4
+
+cdef extern from "assimp/postprocess.h":
+    cdef enum:
+        aiProcess_CalcTangentSpace
+        aiProcess_JoinIdenticalVertices
+        aiProcess_MakeLeftHanded
+        aiProcess_Triangulate
+        aiProcess_RemoveComponent
+        aiProcess_GenNormals
+        aiProcess_GenSmoothNormals
+        aiProcess_SplitLargeMeshes
+        aiProcess_PreTransformVertices
+        aiProcess_LimitBoneWeights
+        aiProcess_ValidateDataStructure
+        aiProcess_ImproveCacheLocality
+        aiProcess_RemoveRedundantMaterials
+        aiProcess_FixInfacingNormals
+        aiProcess_SortByPType
+        aiProcess_FindDegenerates
+        aiProcess_FindInvalidData
+        aiProcess_GenUVCoords
+        aiProcess_TransformUVCoords
+        aiProcess_FindInstances
+        aiProcess_OptimizeMeshes
+        aiProcess_OptimizeGraph
+        aiProcess_FlipUVs
+        aiProcess_FlipWindingOrder
+        aiProcess_SplitByBoneCount
+        aiProcess_Debone
+        aiProcess_GlobalScale
+        aiProcess_EmbedTextures
+        aiProcess_ForceGenNormals
+        aiProcess_DropNormals
+        aiProcess_GenBoundingBoxes
+
+        aiProcessPreset_TargetRealtime_Fast
+        aiProcessPreset_TargetRealtime_Quality
+        aiProcessPreset_TargetRealtime_MaxQuality
+
+        aiProcess_ConvertToLeftHanded
+
+cdef extern from "assimp/mesh.h":
+    cdef enum aiPrimitiveType:
+        aiPrimitiveType_POINT
+        aiPrimitiveType_LINE
+        aiPrimitiveType_TRIANGLE
+        aiPrimitiveType_POLYGON
+
+
+    cdef struct aiMesh:
+        unsigned int mNumVertices
+        unsigned int mNumFaces
+
+        aiVector3D *mVertices
+        aiVector3D *mNormals
+        aiVector3D *mTangents
+        aiVector3D *mBitangents
+
+cdef extern from "assimp/scene.h":
+
+    cdef struct aiNode:
+        aiMatrix4x4 mTransformation
+        aiNode *mParent
+        unsigned int mNumChildren
+        aiNode **mChildren
+        unsigned int mNumMeshes
+        unsigned int *mMeshes
+
+    cdef struct aiScene:
+        unsigned int mNumMeshes
+        unsigned int mNumMaterials
+        unsigned int mNumAnimations
+        unsigned int mNumTextures
+        unsigned int mNumLights
+        unsigned int mNumCameras
+
+        aiNode *mRootNode
+        aiMesh **mMeshes
+
+cdef extern from "assimp/Importer.hpp" namespace "Assimp":
+
+    cdef cppclass Importer:
+        Importer()
+        const aiScene *ReadFile(const char* pFile, unsigned int pFlags)
+        const aiScene *GetScene()
+        const char *GetErrorString()