1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.apis.graphics.kube; 18 19 import java.nio.IntBuffer; 20 21 public class GLVertex { 22 23 public float x; 24 public float y; 25 public float z; 26 final short index; // index in vertex table 27 GLColor color; 28 GLVertex()29 GLVertex() { 30 this.x = 0; 31 this.y = 0; 32 this.z = 0; 33 this.index = -1; 34 } 35 GLVertex(float x, float y, float z, int index)36 GLVertex(float x, float y, float z, int index) { 37 this.x = x; 38 this.y = y; 39 this.z = z; 40 this.index = (short)index; 41 } 42 43 @Override equals(Object other)44 public boolean equals(Object other) { 45 if (other instanceof GLVertex) { 46 GLVertex v = (GLVertex)other; 47 return (x == v.x && y == v.y && z == v.z); 48 } 49 return false; 50 } 51 toFixed(float x)52 static public int toFixed(float x) { 53 return (int)(x * 65536.0f); 54 } 55 put(IntBuffer vertexBuffer, IntBuffer colorBuffer)56 public void put(IntBuffer vertexBuffer, IntBuffer colorBuffer) { 57 vertexBuffer.put(toFixed(x)); 58 vertexBuffer.put(toFixed(y)); 59 vertexBuffer.put(toFixed(z)); 60 if (color == null) { 61 colorBuffer.put(0); 62 colorBuffer.put(0); 63 colorBuffer.put(0); 64 colorBuffer.put(0); 65 } else { 66 colorBuffer.put(color.red); 67 colorBuffer.put(color.green); 68 colorBuffer.put(color.blue); 69 colorBuffer.put(color.alpha); 70 } 71 } 72 update(IntBuffer vertexBuffer, M4 transform)73 public void update(IntBuffer vertexBuffer, M4 transform) { 74 // skip to location of vertex in mVertex buffer 75 vertexBuffer.position(index * 3); 76 77 if (transform == null) { 78 vertexBuffer.put(toFixed(x)); 79 vertexBuffer.put(toFixed(y)); 80 vertexBuffer.put(toFixed(z)); 81 } else { 82 GLVertex temp = new GLVertex(); 83 transform.multiply(this, temp); 84 vertexBuffer.put(toFixed(temp.x)); 85 vertexBuffer.put(toFixed(temp.y)); 86 vertexBuffer.put(toFixed(temp.z)); 87 } 88 } 89 } 90