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asblender

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资源说明：Actionscript 3 library for reading Blender .blend files

ASBLENDER
=========================================

ASBlender is an Actionscript 3 library to read Blender .blend files.

See http://www.blender.org/development/architecture/blender-file-format/ for an explanation of the .blend format.

The complete .blend is read into simple AS3 Object's which map to the structures defined in the so-called DNA.

Disadvantage of this approach is that you have to "know" how the structures look like.
=> check "printDNA" in USAGE below

USAGE
=========================================

[Embed (source="/assets/crystal_cube.blend", mimeType="application/octet-stream")]
public var BlenderData:Class;

var blend:BlendFile = new BlendFile();

blend.read(new BlenderData());
			
if (blend.scenes.length) {
    // Blender can have multiple scenes, don't know yet how to grab the "active" scene.
	buildScene(blend.scenes[0]);
}

/**
 * Prints out the DNA as contained in the .blend
 */
private function printDNA(blend:BlendFile):void {
	var struct:DNAStruct;
	var field:DNAField;
	
	for each (struct in blend.dna.structs) {
		var type:String = blend.dna.types[ struct.type ];
		
		trace(type);
		
		for each (field in struct.fields) {
			trace(field.type + " " + field.name);
		}
	}
}

private function buildScene(scene:Object):void {

	var obj:Object = scene.base.first;
	
	while (obj) {
		// grab the Blender Object.
		// The Blender Object defines rotation, scale, translation etc.
		var object:Object = obj.object; 
		
		trace("Object name: " + object.id.name + " type: " + object.type + " matrix: " + object.obmat);
		
		//for (var key:String in object) {
		//	trace(key);
		//}
		
		if (object.data) {
			switch (object.type) {
				case 1:	// Mesh
					trace (" -> Mesh: " + object.data.id.name);
					buildMesh(object.data);
					break;
				case 10: // Lamp
					trace (" -> Lamp: " + object.data.id.name);
					break;
				case 11: // Camera
					trace (" -> Camera: " + object.data.id.name);
					break;
				default:
					break;
			}
		}
		
		obj = obj.next;
	}
}

private function buildMesh(mesh:Object):void {
	var numVertices:int = mesh.totvert;
	var numFaces:int = mesh.totface;
	var i:int;
	
	trace(" -> #verts : " + numVertices);

	for (i = 0; i < numVertices; i++) {	
		var v:Object = mesh.mvert[i];
		
		var x:Number = v.co[0];
		var y:Number = v.co[1];
		var z:Number = v.co[2];
		
		trace(" -> -> vertex: " + x + " " + y + " " + z);
	}
	
	trace(" -> #faces : " + numFaces);
	
	for (i = 0; i < numFaces; i++) {	
		var f:Object = mesh.mface[i];
		
		var v1:int = f.v1;
		var v2:int = f.v2;
		var v3:int = f.v3;
		var v4:int = f.v4;
		
		trace(" -> -> indices: " + v1 + " " + v2 + " " + v3 + " " + v4);
		
		if (mesh.mtface) {
			// UV coords are defined
			var tf:Object = mesh.mtface[i];
			
			trace(" -> -> -> uv: " + tf.uv);
		}
	}
}

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