2025-12-01

2026-03-17 14:58:51 -06:00
parent 183e865f8b
commit 4b82b57113
6846 changed files with 954887 additions and 162606 deletions
@@ -0,0 +1,113 @@
+# MIT License
+# 
+# Copyright (C) 2025 Ryan L. Guy & Dennis Fassbaender
+# 
+# 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.
+
+import ctypes
+import array
+import struct
+
+class TriangleMesh_t(ctypes.Structure):
+    _fields_ = [("vertices", ctypes.c_void_p),
+                ("triangles", ctypes.c_void_p),
+                ("num_vertices", ctypes.c_int),
+                ("num_triangles", ctypes.c_int)]
+
+class TriangleMesh(object):
+    def __init__(self):
+        self.vertices = array.array('f', [])
+        self.triangles = array.array('i', [])
+
+
+    @classmethod
+    def from_bobj(cls, bobj_data):
+        int_data, bobj_data = bobj_data[:4], bobj_data[4:]
+        num_vertices = struct.unpack('i', int_data)[0]
+
+        num_floats = 3 * num_vertices
+        num_bytes = 4 * num_floats
+        vertex_data, bobj_data = bobj_data[:num_bytes], bobj_data[num_bytes:]
+        vertices = list(struct.unpack('{0}f'.format(num_floats), vertex_data))
+
+        int_data, bobj_data = bobj_data[:4], bobj_data[4:]
+        num_triangles = struct.unpack('i', int_data)[0]
+
+        num_ints = 3 * num_triangles
+        num_bytes = 4 * num_ints
+        triangle_data, bobj_data = bobj_data[:num_bytes], bobj_data[num_bytes:]
+        triangles = list(struct.unpack('{0}i'.format(num_ints), triangle_data))
+
+        self = cls()
+        self.vertices = array.array('f', vertices)
+        self.triangles = array.array('i', triangles)
+
+        return self
+
+
+    def to_bobj(self):
+        num_vertices = len(self.vertices) // 3
+        num_triangles = len(self.triangles) // 3
+        datastr = struct.pack('i', num_vertices)
+        datastr += self.vertices.tobytes()
+        datastr += struct.pack('i', num_triangles)
+        datastr += self.triangles.tobytes()
+
+        return datastr
+
+    def to_struct(self):
+
+        num_vertices = len(self.vertices) // 3
+        num_triangles = len(self.triangles) // 3
+
+        vertex_data = (ctypes.c_float * len(self.vertices))()
+        for i in range(len(self.vertices)):
+            vertex_data[i] = self.vertices[i]
+
+        triangle_data = (ctypes.c_int * len(self.triangles))()
+        for i in range(len(self.triangles)):
+            triangle_data[i] = self.triangles[i]
+
+        struct = TriangleMesh_t()
+        struct.vertices = ctypes.cast(vertex_data, ctypes.c_void_p)
+        struct.triangles = ctypes.cast(triangle_data, ctypes.c_void_p)
+        struct.num_vertices = num_vertices
+        struct.num_triangles = num_triangles
+
+        return struct
+
+    def apply_transform(self, matrix_world):
+        m = matrix_world
+        for i in range(0, len(self.vertices), 3):
+            v = [self.vertices[i + 0], self.vertices[i + 1], self.vertices[i + 2], 1]
+            self.vertices[i + 0] = v[0]*m[0] + v[1]*m[1] + v[2]*m[2] + v[3]*m[3]
+            self.vertices[i + 1] = v[0]*m[4] + v[1]*m[5] + v[2]*m[6] + v[3]*m[7]
+            self.vertices[i + 2] = v[0]*m[8] + v[1]*m[9] + v[2]*m[10] + v[3]*m[11]
+
+    def translate(self, tx, ty, tz):
+        for i in range(0, len(self.vertices), 3):
+            self.vertices[i + 0] += tx
+            self.vertices[i + 1] += ty
+            self.vertices[i + 2] += tz
+
+    def scale(self, scale):
+        for i in range(0, len(self.vertices), 3):
+            self.vertices[i + 0] *= scale
+            self.vertices[i + 1] *= scale
+            self.vertices[i + 2] *= scale