feat: implement Blender export script with logging and material creation

tools/blender_export_simple.py

@@ -0,0 +1,130 @@
+import bpy
+import os
+
+# Output directory
+output_dir = os.path.expanduser("~/.cache/starworld/primitives")
+os.makedirs(output_dir, exist_ok=True)
+
+# Log file
+log_path = os.path.join(output_dir, "export_log.txt")
+log = open(log_path, 'w')
+
+def log_print(msg):
+    print(msg)
+    log.write(msg + "\n")
+    log.flush()
+
+log_print("="*60)
+log_print("BLENDER EXPORT SCRIPT STARTING")
+log_print("="*60)
+
+# Clear scene
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete(use_global=False)
+log_print("Cleared scene")
+
+def create_colored_material(name, color):
+    mat = bpy.data.materials.new(name=name)
+    mat.use_nodes = True
+    
+    # Find or create Principled BSDF
+    bsdf = None
+    for node in mat.node_tree.nodes:
+        if node.type == 'BSDF_PRINCIPLED':
+            bsdf = node
+            break
+    
+    if not bsdf:
+        bsdf = mat.node_tree.nodes.new(type='ShaderNodeBsdfPrincipled')
+    
+    bsdf.inputs['Base Color'].default_value = color
+    bsdf.inputs['Roughness'].default_value = 0.5
+    bsdf.inputs['Metallic'].default_value = 0.1
+    
+    return mat
+
+# SPHERE (GREEN)
+log_print("\n1. Creating GREEN sphere...")
+bpy.ops.mesh.primitive_uv_sphere_add(segments=32, ring_count=16, radius=0.5)
+sphere = bpy.context.active_object
+sphere.name = "Sphere"
+bpy.ops.object.shade_smooth()
+log_print("   Created and smoothed")
+
+mat = create_colored_material("GreenMat", (0.2, 1.0, 0.2, 1.0))
+sphere.data.materials.append(mat)
+log_print("   Applied green material")
+
+bpy.ops.object.select_all(action='DESELECT')
+sphere.select_set(True)
+
+sphere_file = os.path.join(output_dir, "sphere.glb")
+log_print(f"   Exporting to: {sphere_file}")
+
+try:
+    bpy.ops.export_scene.gltf(filepath=sphere_file, use_selection=True)
+    log_print("   ✓ SUCCESS!")
+except Exception as e:
+    log_print(f"   ✗ FAILED: {e}")
+
+bpy.ops.object.delete(use_global=False)
+
+# CUBE (RED)
+log_print("\n2. Creating RED cube...")
+bpy.ops.mesh.primitive_cube_add(size=1.0)
+cube = bpy.context.active_object  
+cube.name = "Cube"
+bpy.ops.object.shade_smooth()
+log_print("   Created and smoothed")
+
+mat = create_colored_material("RedMat", (1.0, 0.2, 0.2, 1.0))
+cube.data.materials.append(mat)
+log_print("   Applied red material")
+
+bpy.ops.object.select_all(action='DESELECT')
+cube.select_set(True)
+
+cube_file = os.path.join(output_dir, "cube.glb")
+log_print(f"   Exporting to: {cube_file}")
+
+try:
+    bpy.ops.export_scene.gltf(filepath=cube_file, use_selection=True)
+    log_print("   ✓ SUCCESS!")
+except Exception as e:
+    log_print(f"   ✗ FAILED: {e}")
+
+bpy.ops.object.delete(use_global=False)
+
+# ICOSPHERE (BLUE)  
+log_print("\n3. Creating BLUE icosphere...")
+bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=2, radius=0.5)
+ico = bpy.context.active_object
+ico.name = "IcoSphere"
+bpy.ops.object.shade_smooth()
+log_print("   Created and smoothed")
+
+mat = create_colored_material("BlueMat", (0.2, 0.2, 1.0, 1.0))
+ico.data.materials.append(mat)
+log_print("   Applied blue material")
+
+bpy.ops.object.select_all(action='DESELECT')
+ico.select_set(True)
+
+ico_file = os.path.join(output_dir, "model.glb")
+log_print(f"   Exporting to: {ico_file}")
+
+try:
+    bpy.ops.export_scene.gltf(filepath=ico_file, use_selection=True)
+    log_print("   ✓ SUCCESS!")
+except Exception as e:
+    log_print(f"   ✗ FAILED: {e}")
+
+log_print("\n" + "="*60)
+log_print("EXPORT COMPLETE!")
+log_print("="*60)
+log_print(f"Check files in: {output_dir}")
+log_print(f"Log saved to: {log_path}")
+
+log.close()
+
+print(f"\n\n*** CHECK LOG FILE: {log_path} ***\n")