球中的initVertex

private void initVertex(float r) {
		// TODO Auto-generated method stub
		R=r;
		ArrayList<Float>alVertix=new ArrayList<Float>();
		for(float vAngle=90;vAngle>-90;vAngle-=angleSpan){
			for(float hAngle=360;hAngle>0;hAngle-=angleSpan){
				float x1=getCoor(0, vAngle, hAngle);
				float y1=getCoor(1, vAngle, hAngle);
				float z1=getCoor(2, vAngle, hAngle);
				
				float x2=getCoor(0, vAngle-angleSpan, hAngle);
				float y2=getCoor(1, vAngle-angleSpan, hAngle);
				float z2=getCoor(2, vAngle-angleSpan, hAngle);
				
				float x3=getCoor(0, vAngle-angleSpan, hAngle-angleSpan);
				float y3=getCoor(1, vAngle-angleSpan, hAngle-angleSpan);
				float z3=getCoor(2, vAngle-angleSpan, hAngle-angleSpan);
				
				float x4=getCoor(0, vAngle, hAngle-angleSpan);
				float y4=getCoor(1, vAngle, hAngle-angleSpan);
				float z4=getCoor(2, vAngle, hAngle-angleSpan);
				
				alVertix.add(x1);alVertix.add(y1);alVertix.add(z1);
        		alVertix.add(x2);alVertix.add(y2);alVertix.add(z2);
        		alVertix.add(x4);alVertix.add(y4);alVertix.add(z4);        		
        		//构建第二三角形
        		alVertix.add(x4);alVertix.add(y4);alVertix.add(z4);
        		alVertix.add(x2);alVertix.add(y2);alVertix.add(z2);
        		alVertix.add(x3);alVertix.add(y3);alVertix.add(z3); 
			}
		}
		 vCount=alVertix.size()/3;
	        float vertices[]=new float[vCount*3];
	    	for(int i=0;i<alVertix.size();i++){
	    		vertices[i]=alVertix.get(i);
	    	}
	        ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
	        vbb.order(ByteOrder.nativeOrder());
	        mVertexBuffer = vbb.asFloatBuffer();
	        mVertexBuffer.put(vertices);
	        mVertexBuffer.position(0);
	}