Android example source code file (GLFace.java)

This example Android source code file (GLFace.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, arraylist, glcolor, glface, glvertex, io, nio, util, utilities, utils

The GLFace.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.graphics.kube;

import android.util.Log;

import java.nio.ShortBuffer;
import java.util.ArrayList;

public class GLFace {

	public GLFace() {
		
	}
	
	// for triangles
	public GLFace(GLVertex v1, GLVertex v2, GLVertex v3) {
		addVertex(v1);
		addVertex(v2);
		addVertex(v3);
	}	
	// for quadrilaterals
	public GLFace(GLVertex v1, GLVertex v2, GLVertex v3, GLVertex v4) {
		addVertex(v1);
		addVertex(v2);
		addVertex(v3);
		addVertex(v4);
	}
		
	public void addVertex(GLVertex v) {
		mVertexList.add(v);
	}
	
	// must be called after all vertices are added
	public void setColor(GLColor c) {
		
		int last = mVertexList.size() - 1;
		if (last < 2) {
			Log.e("GLFace", "not enough vertices in setColor()");
		} else {
			GLVertex vertex = mVertexList.get(last);
			
			// only need to do this if the color has never been set
			if (mColor == null) {
				while (vertex.color != null) {
					mVertexList.add(0, vertex);
					mVertexList.remove(last + 1);
					vertex = mVertexList.get(last);
				}
			}
			
			vertex.color = c;
		}

		mColor = c;
	}
	
	public int getIndexCount() {
		return (mVertexList.size() - 2) * 3;
	}
	
	public void putIndices(ShortBuffer buffer) {
		int last = mVertexList.size() - 1;

		GLVertex v0 = mVertexList.get(0);
		GLVertex vn = mVertexList.get(last);
		
		// push triangles into the buffer
		for (int i = 1; i < last; i++) {
			GLVertex v1 = mVertexList.get(i);
			buffer.put(v0.index);
			buffer.put(v1.index);
			buffer.put(vn.index);
			v0 = v1;
		}
	}
	
	private ArrayList<GLVertex> mVertexList = new ArrayList();
	private GLColor mColor;
}