Android example source code file (GLVertex.java)

This example Android source code file (GLVertex.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

glcolor, glvertex, intbuffer, io, m4, nio, override

The GLVertex.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 java.nio.IntBuffer;

public class GLVertex {

    public float x;
    public float y;
    public float z;
    final short index; // index in vertex table
    GLColor color;

    GLVertex() {
        this.x = 0;
        this.y = 0;
        this.z = 0;
        this.index = -1;
    }

    GLVertex(float x, float y, float z, int index) {
        this.x = x;
        this.y = y;
        this.z = z;
        this.index = (short)index;
    }

    @Override
    public boolean equals(Object other) {
        if (other instanceof GLVertex) {
            GLVertex v = (GLVertex)other;
            return (x == v.x && y == v.y && z == v.z);
        }
        return false;
    }

    static public int toFixed(float x) {
        return (int)(x * 65536.0f);
    }

    public void put(IntBuffer vertexBuffer, IntBuffer colorBuffer) {
        vertexBuffer.put(toFixed(x));
        vertexBuffer.put(toFixed(y));
        vertexBuffer.put(toFixed(z));
        if (color == null) {
            colorBuffer.put(0);
            colorBuffer.put(0);
            colorBuffer.put(0);
            colorBuffer.put(0);
        } else {
            colorBuffer.put(color.red);
            colorBuffer.put(color.green);
            colorBuffer.put(color.blue);
            colorBuffer.put(color.alpha);
        }
    }

    public void update(IntBuffer vertexBuffer, M4 transform) {
        // skip to location of vertex in mVertex buffer
        vertexBuffer.position(index * 3);

        if (transform == null) {
            vertexBuffer.put(toFixed(x));
            vertexBuffer.put(toFixed(y));
            vertexBuffer.put(toFixed(z));
        } else {
            GLVertex temp = new GLVertex();
            transform.multiply(this, temp);
            vertexBuffer.put(toFixed(temp.x));
            vertexBuffer.put(toFixed(temp.y));
            vertexBuffer.put(toFixed(temp.z));
        }
    }
}