初次提交
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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="src" path="gen"/>
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<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>
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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>Sample15_6</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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||||
<arguments>
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</arguments>
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</buildCommand>
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||||
<buildCommand>
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||||
<name>com.android.ide.eclipse.adt.ApkBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
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<nature>org.eclipse.jdt.core.javanature</nature>
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</natures>
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</projectDescription>
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@@ -0,0 +1,12 @@
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#Wed Jan 05 21:56:15 CST 2011
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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.6
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.6
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@@ -0,0 +1,15 @@
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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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android:versionCode="1"
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android:versionName="1.0" package="com.bn.Sample15_6">
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<application android:icon="@drawable/icon" android:label="@string/app_name">
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<activity android:name=".Sample15_6_Activity"
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android:label="@string/app_name">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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<uses-sdk android:targetSdkVersion="8"></uses-sdk>
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</manifest>
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Load Diff
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precision mediump float; //给出默认浮点精度
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varying vec2 vTextureCoord; //接收从顶点着色器传递过来的纹理坐标
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varying vec3 fNormal; //接收从顶点着色器传递过来的法向量
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varying vec3 ftNormal; //接收从顶点着色器传递过来的切向量
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varying vec3 vPosition; //接收从顶点着色器传递过来的顶点位置
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uniform sampler2D sTextureWg; //纹理内容数据（外观）
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uniform sampler2D sTextureNormal; //纹理内容数据（法线）
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uniform mat4 uMMatrix; //变换矩阵
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uniform vec3 uCamera; //摄像机位置
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uniform vec3 uLightLocationSun; //光源位置
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void pointLight( //定位光光照计算的方法
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in vec3 normal, //扰动后法向量
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out vec4 ambient, //最终环境光强度
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out vec4 diffuse, //最终散射光强度
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out vec4 specular, //最终镜面光强度
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in vec3 vp, //变换到标准法向量所属坐标系的表面点到光源位置的向量
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in vec3 eye, //变换到标准法向量所属坐标系的视线向量
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in vec4 lightAmbient, //环境光强度
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in vec4 lightDiffuse, //散射光强度
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in vec4 lightSpecular //镜面光强度
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){
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ambient=lightAmbient; //直接得出环境光的最终强度
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vec3 halfVector=normalize(vp+eye); //求视线与光线的半向量
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float shininess=50.0; //粗糙度，越小越光滑
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float nDotViewPosition=max(0.0,dot(normal,vp)); //求法向量与vp的点积与0的最大值
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diffuse=lightDiffuse*nDotViewPosition; //计算散射光的最终强度
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float nDotViewHalfVector=dot(normal,halfVector); //法向量与半向量的点积
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float powerFactor=max(0.0,pow(nDotViewHalfVector,shininess)); //镜面反射光强度因子
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specular=lightSpecular*powerFactor; //计算镜面光的最终强度
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}
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void main(){
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vec4 ambient,diffuse,specular; //用来接收三个通道最终强度的变量
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vec4 normalColor = texture2D(sTextureNormal, vTextureCoord); //从法线纹理图中读出值
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//将值恢复到-1～+1范围
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vec3 cNormal=vec3(2.0*(normalColor.r-0.5),2.0*(normalColor.g-0.5),2.0*(normalColor.b-0.5));
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cNormal=normalize(cNormal); //将扰动结果向量规格化
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//计算变换后的法向量
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vec3 normalTarget=vPosition+fNormal;
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vec3 newNormal=(uMMatrix*vec4(normalTarget,1)).xyz-(uMMatrix*vec4(vPosition,1)).xyz;
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newNormal=normalize(newNormal);
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//计算变换后的切向量
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vec3 tangentTarget=vPosition+ftNormal;
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vec3 newTangent=(uMMatrix*vec4(tangentTarget,1)).xyz-(uMMatrix*vec4(vPosition,1)).xyz;
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newTangent=normalize(newTangent);
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vec3 binormal=normalize(cross(newTangent,newNormal)); //计算副法向量
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//用切向量、副法向量、法向量搭建变换矩阵，此矩阵用于将向量
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//从实际坐标系变换到标准法向量所属坐标系
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mat3 rotation=mat3(newTangent,binormal,newNormal);
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vec3 newPosition=(uMMatrix*vec4(vPosition,1)).xyz; //变换后的片元位置
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vec3 vp= normalize(uLightLocationSun-newPosition); //求表面点到光源位置的向量vp并规格化
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vp=normalize(rotation*vp); //变换并规格化vp向量
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//求出从表面点到摄像机的视线向量进行变换并规格化
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vec3 eye= normalize(rotation*normalize(uCamera-newPosition));
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pointLight(cNormal,ambient,diffuse,specular,vp,eye,
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vec4(0.05,0.05,0.05,1.0),vec4(1.0,1.0,1.0,1.0),vec4(0.3,0.3,0.3,1.0));
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vec4 finalColor=texture2D(sTextureWg, vTextureCoord); //根据纹理坐标采样出片元颜色值
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//综合三个通道光的最终强度及片元的颜色计算出最终片元的颜色并传递给管线
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gl_FragColor = finalColor*ambient+finalColor*specular+finalColor*diffuse;
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}
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uniform mat4 uMVPMatrix; //总变换矩阵
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attribute vec3 aPosition; //顶点位置
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attribute vec2 aTexCoor; //顶点纹理坐标
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attribute vec3 aNormal; //法向量
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attribute vec3 tNormal; //切向量
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varying vec2 vTextureCoord; //用于传递给片元着色器的纹理坐标
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varying vec3 fNormal; //用于传递给片元着色器的法向量
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varying vec3 ftNormal; //用于传递给片元着色器的切向量
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varying vec3 vPosition; //用于传递给片元着色器的顶点位置
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void main() {
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gl_Position = uMVPMatrix * vec4(aPosition,1); //根据总变换矩阵计算此次绘制此顶点的位置
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vTextureCoord=aTexCoor; //将顶点的纹理坐标传给片元着色器
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fNormal=aNormal; //将顶点的法向量传给片元着色器
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ftNormal=tNormal; //将顶点的切向量传给片元着色器
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vPosition=aPosition; //将顶点的位置传给片元着色器
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}
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# This file is automatically generated by Android Tools.
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# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
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#
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# This file must be checked in Version Control Systems.
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#
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# To customize properties used by the Ant build system use,
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# "build.properties", and override values to adapt the script to your
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# project structure.
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# Indicates whether an apk should be generated for each density.
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split.density=false
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# Project target.
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target=android-8
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/* AUTO-GENERATED FILE. DO NOT MODIFY.
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*
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* This class was automatically generated by the
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* aapt tool from the resource data it found. It
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* should not be modified by hand.
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*/
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package com.bn.Sample15_6;
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public final class R {
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public static final class attr {
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}
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public static final class drawable {
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public static final int gridnt=0x7f020000;
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public static final int icon=0x7f020001;
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public static final int zs=0x7f020002;
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}
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public static final class string {
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public static final int app_name=0x7f030000;
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}
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}
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After Width: | Height: | Size: 4.0 KiB |
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After Width: | Height: | Size: 1.7 KiB |
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After Width: | Height: | Size: 2.5 KiB |
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<?xml version="1.0" encoding="utf-8"?>
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<resources>
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<string name="app_name">Sample15_6</string>
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</resources>
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package com.bn.Sample15_6;
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//常量类
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public class Constant
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{
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public static final float MAX_S_QHC=1.0f;//青花瓷最大S纹理坐标
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public static final float MAX_T_QHC=0.746f;//青花瓷最大T纹理坐标
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public static final float MAX_S_GHXP=2.0f;//国画小品最大S纹理坐标
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public static final float MAX_T_GHXP=2.0f;//国画小品最大T纹理坐标
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}
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package com.bn.Sample15_6;
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import java.io.BufferedReader;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import android.content.res.Resources;
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import android.util.Log;
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import static com.bn.Sample15_6.Constant.*;
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public class LoadUtil
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{
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//求两个向量的叉积
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public static float[] getCrossProduct(float x1,float y1,float z1,float x2,float y2,float z2)
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{
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//求出两个矢量叉积矢量在XYZ轴的分量ABC
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float A=y1*z2-y2*z1;
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float B=z1*x2-z2*x1;
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float C=x1*y2-x2*y1;
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return new float[]{A,B,C};
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}
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//向量规格化
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public static float[] vectorNormal(float[] vector)
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{
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//求向量的模
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float module=(float)Math.sqrt(vector[0]*vector[0]+vector[1]*vector[1]+vector[2]*vector[2]);
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return new float[]{vector[0]/module,vector[1]/module,vector[2]/module};
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}
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//从obj文件中加载携带顶点信息的物体，并自动计算每个顶点的平均法向量
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public static LoadedObjectVertexNormalTexture loadFromFile
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(String fname, Resources r,MySurfaceView mv)
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{
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//加载后物体的引用
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LoadedObjectVertexNormalTexture lo=null;
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//原始顶点坐标列表--直接从obj文件中加载
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ArrayList<Float> alv=new ArrayList<Float>();
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//顶点组装面索引列表--根据面的信息从文件中加载
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ArrayList<Integer> alFaceIndex=new ArrayList<Integer>();
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//结果顶点坐标列表--按面组织好
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ArrayList<Float> alvResult=new ArrayList<Float>();
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//平均前各个索引对应的点的法向量集合Map
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//此HashMap的key为点的索引， value为点所在的各个面的法向量的集合
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HashMap<Integer,HashSet<Normal>> hmn=new HashMap<Integer,HashSet<Normal>>();
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//原始纹理坐标列表
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ArrayList<Float> alt=new ArrayList<Float>();
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//纹理坐标结果列表
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ArrayList<Float> altResult=new ArrayList<Float>();
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try
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{
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InputStream in=r.getAssets().open(fname);
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InputStreamReader isr=new InputStreamReader(in);
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BufferedReader br=new BufferedReader(isr);
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String temps=null;
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//扫面文件，根据行类型的不同执行不同的处理逻辑
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while((temps=br.readLine())!=null)
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{
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//用空格分割行中的各个组成部分
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String[] tempsa=temps.split("[ ]+");
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if(tempsa[0].trim().equals("v"))
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{//此行为顶点坐标
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//若为顶点坐标行则提取出此顶点的XYZ坐标添加到原始顶点坐标列表中
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alv.add(Float.parseFloat(tempsa[1]));
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alv.add(Float.parseFloat(tempsa[2]));
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alv.add(Float.parseFloat(tempsa[3]));
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}
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||||
else if(tempsa[0].trim().equals("vt"))
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{//此行为纹理坐标行
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//若为纹理坐标行则提取ST坐标并添加进原始纹理坐标列表中
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//采用国画小品纹理图时的代码
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alt.add(Float.parseFloat(tempsa[1])*MAX_S_GHXP);
|
||||
alt.add(Float.parseFloat(tempsa[2])*MAX_T_GHXP);
|
||||
}
|
||||
else if(tempsa[0].trim().equals("f"))
|
||||
{//此行为三角形面
|
||||
/*
|
||||
*若为三角形面行则根据 组成面的顶点的索引从原始顶点坐标列表中
|
||||
*提取相应的顶点坐标值添加到结果顶点坐标列表中，同时根据三个
|
||||
*顶点的坐标计算出此面的法向量并添加到平均前各个索引对应的点
|
||||
*的法向量集合组成的Map中
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||||
*/
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||||
|
||||
int[] index=new int[3];//三个顶点索引值的数组
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||||
|
||||
//计算第0个顶点的索引，并获取此顶点的XYZ三个坐标
|
||||
index[0]=Integer.parseInt(tempsa[1].split("/")[0])-1;
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||||
float x0=alv.get(3*index[0]);
|
||||
float y0=alv.get(3*index[0]+1);
|
||||
float z0=alv.get(3*index[0]+2);
|
||||
alvResult.add(x0);
|
||||
alvResult.add(y0);
|
||||
alvResult.add(z0);
|
||||
|
||||
//计算第1个顶点的索引，并获取此顶点的XYZ三个坐标
|
||||
index[1]=Integer.parseInt(tempsa[2].split("/")[0])-1;
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||||
float x1=alv.get(3*index[1]);
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||||
float y1=alv.get(3*index[1]+1);
|
||||
float z1=alv.get(3*index[1]+2);
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alvResult.add(x1);
|
||||
alvResult.add(y1);
|
||||
alvResult.add(z1);
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||||
|
||||
//计算第2个顶点的索引，并获取此顶点的XYZ三个坐标
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||||
index[2]=Integer.parseInt(tempsa[3].split("/")[0])-1;
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||||
float x2=alv.get(3*index[2]);
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||||
float y2=alv.get(3*index[2]+1);
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||||
float z2=alv.get(3*index[2]+2);
|
||||
alvResult.add(x2);
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||||
alvResult.add(y2);
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||||
alvResult.add(z2);
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||||
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||||
//记录此面的顶点索引
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||||
alFaceIndex.add(index[0]);
|
||||
alFaceIndex.add(index[1]);
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||||
alFaceIndex.add(index[2]);
|
||||
|
||||
//通过三角形面两个边向量0-1，0-2求叉积得到此面的法向量
|
||||
//求0号点到1号点的向量
|
||||
float vxa=x1-x0;
|
||||
float vya=y1-y0;
|
||||
float vza=z1-z0;
|
||||
//求0号点到2号点的向量
|
||||
float vxb=x2-x0;
|
||||
float vyb=y2-y0;
|
||||
float vzb=z2-z0;
|
||||
//通过求两个向量的叉积计算法向量
|
||||
float[] vNormal=getCrossProduct
|
||||
(
|
||||
vxa,vya,vza,vxb,vyb,vzb
|
||||
);
|
||||
|
||||
for(int tempInxex:index)
|
||||
{//记录每个索引点的法向量到平均前各个索引对应的点的法向量集合组成的Map中
|
||||
//获取当前索引对应点的法向量集合
|
||||
HashSet<Normal> hsn=hmn.get(tempInxex);
|
||||
if(hsn==null)
|
||||
{//若集合不存在则创建
|
||||
hsn=new HashSet<Normal>();
|
||||
}
|
||||
//将此点的法向量添加到集合中
|
||||
//由于Normal类重写了equals方法，因此同样的法向量不会重复出现在此点
|
||||
//对应的法向量集合中
|
||||
hsn.add(new Normal(vNormal[0],vNormal[1],vNormal[2]));
|
||||
//将集合放进HsahMap中
|
||||
hmn.put(tempInxex, hsn);
|
||||
}
|
||||
|
||||
//将纹理坐标组织到结果纹理坐标列表中
|
||||
//第0个顶点的纹理坐标
|
||||
int indexTex=Integer.parseInt(tempsa[1].split("/")[1])-1;
|
||||
altResult.add(alt.get(indexTex*2));
|
||||
altResult.add(alt.get(indexTex*2+1));
|
||||
//第1个顶点的纹理坐标
|
||||
indexTex=Integer.parseInt(tempsa[2].split("/")[1])-1;
|
||||
altResult.add(alt.get(indexTex*2));
|
||||
altResult.add(alt.get(indexTex*2+1));
|
||||
//第2个顶点的纹理坐标
|
||||
indexTex=Integer.parseInt(tempsa[3].split("/")[1])-1;
|
||||
altResult.add(alt.get(indexTex*2));
|
||||
altResult.add(alt.get(indexTex*2+1));
|
||||
}
|
||||
}
|
||||
|
||||
//生成顶点数组
|
||||
int size=alvResult.size();
|
||||
float[] vXYZ=new float[size];
|
||||
for(int i=0;i<size;i++)
|
||||
{
|
||||
vXYZ[i]=alvResult.get(i);
|
||||
}
|
||||
|
||||
//生成法向量数组
|
||||
float[] nXYZ=new float[alFaceIndex.size()*3];
|
||||
int c=0;
|
||||
for(Integer i:alFaceIndex)
|
||||
{
|
||||
//根据当前点的索引从Map中取出一个法向量的集合
|
||||
HashSet<Normal> hsn=hmn.get(i);
|
||||
//求出平均法向量
|
||||
float[] tn=Normal.getAverage(hsn);
|
||||
//将计算出的平均法向量存放到法向量数组中
|
||||
nXYZ[c++]=tn[0];
|
||||
nXYZ[c++]=tn[1];
|
||||
nXYZ[c++]=tn[2];
|
||||
}
|
||||
|
||||
//生成切向量数组
|
||||
float[] tnXYZ=new float[nXYZ.length];
|
||||
int kc=nXYZ.length/3;
|
||||
for(int i=0;i<kc;i++)
|
||||
{
|
||||
float[] normal=new float[]{nXYZ[i*3],nXYZ[i*3+1],nXYZ[i*3+2]};
|
||||
float[] position=new float[]{vXYZ[i*3],vXYZ[i*3+1],vXYZ[i*3+2]};
|
||||
float[] tangent=fromNormalToTangent(normal,position);
|
||||
tnXYZ[i*3]=tangent[0];
|
||||
tnXYZ[i*3+1]=tangent[1];
|
||||
tnXYZ[i*3+2]=tangent[2];
|
||||
}
|
||||
|
||||
//生成纹理数组
|
||||
size=altResult.size();
|
||||
float[] tST=new float[size];
|
||||
for(int i=0;i<size;i++)
|
||||
{
|
||||
tST[i]=altResult.get(i);
|
||||
}
|
||||
|
||||
//创建3D物体对象
|
||||
lo=new LoadedObjectVertexNormalTexture(mv,vXYZ,nXYZ,tST,tnXYZ);
|
||||
}
|
||||
catch(Exception e)
|
||||
{
|
||||
Log.d("load error", "load error");
|
||||
e.printStackTrace();
|
||||
}
|
||||
return lo;
|
||||
}
|
||||
|
||||
//右法向量值和对应顶点折算切向量
|
||||
public static float[] fromNormalToTangent(float[] normal,float[] position){
|
||||
//取出求切面点法式平面方程需要的参数
|
||||
float A=normal[0];float B=normal[1];float C=normal[2];
|
||||
float x0=position[0];float y0=position[1];float z0=position[2];
|
||||
float[] resultY=null;//声明用于存放第一个切向量的数组
|
||||
//求出切平面上离position位置X、Z分量各差1个单位的点的坐标
|
||||
float x1=x0+1; float z1=z0+1; float y1=(C*(z0-z1)+A*(x0-x1))/B+y0;
|
||||
resultY=new float[]{x1-x0,y1-y0,z1-z0};//求出第一个切向量
|
||||
float[] resultZ=null;//声明用于存放第二个切向量的数组
|
||||
//求出切平面上离position位置X、Y分量各差1个单位的点的坐标
|
||||
x1=x0+1;y1=y0+1; z1=(A*(x0-x1)+B*(y0-y1))/C+z0;
|
||||
resultZ=new float[]{x1-x0,y1-y0,z1-z0};//求出第二个切向量
|
||||
float[] resultX=null;//声明用于存放第三个切向量的数组
|
||||
//求出切平面上离position位置Y、Z分量各差1个单位的点的坐标
|
||||
y1=y0+1; z1=z0+1; x1=(B*(y0-y1)+C*(z0-z1))/A+x0;
|
||||
resultX=new float[]{x1-x0,y1-y0,z1-z0}; //求出第三个切向量
|
||||
if(resultX[0]<50){return resultX;}//若第一个可能的切向量在指定范围内则取第一个
|
||||
else if(resultY[1]<50){return resultY;}//若第二个可能的切向量在指定范围内则取第二个
|
||||
else{return resultZ;}//否则取第三个
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,185 @@
|
||||
package com.bn.Sample15_6;
|
||||
import java.nio.ByteBuffer;
|
||||
import java.nio.ByteOrder;
|
||||
import java.nio.FloatBuffer;
|
||||
import android.opengl.GLES20;
|
||||
|
||||
//加载后的物体——仅携带顶点信息，颜色随机
|
||||
public class LoadedObjectVertexNormalTexture
|
||||
{
|
||||
int mProgram;//自定义渲染管线着色器程序id
|
||||
int muMVPMatrixHandle;//总变换矩阵引用
|
||||
int muMMatrixHandle;//位置、旋转变换矩阵
|
||||
int maPositionHandle; //顶点位置属性引用
|
||||
int maNormalHandle; //顶点法向量属性引用
|
||||
int maTangentHandle; //顶点切向量属性引用
|
||||
int maLightLocationHandle;//光源位置属性引用
|
||||
int maCameraHandle; //摄像机位置属性引用
|
||||
int maTexCoorHandle; //顶点纹理坐标属性引用
|
||||
String mVertexShader;//顶点着色器代码脚本
|
||||
String mFragmentShader;//片元着色器代码脚本
|
||||
|
||||
FloatBuffer mVertexBuffer;//顶点坐标数据缓冲
|
||||
FloatBuffer mNormalBuffer;//顶点法向量数据缓冲
|
||||
FloatBuffer mTangentBuffer;//顶点切向量数据缓冲
|
||||
FloatBuffer mTexCoorBuffer;//顶点纹理坐标数据缓冲
|
||||
int vCount=0;
|
||||
|
||||
int uTexHandle;//外观纹理属性引用
|
||||
int uNormalTexHandle;//法线纹理属性引用
|
||||
|
||||
public LoadedObjectVertexNormalTexture(MySurfaceView mv,float[] vertices,float[] normals,float[] texCoors,float[] tangent)
|
||||
{
|
||||
//初始化顶点坐标与着色数据
|
||||
initVertexData(vertices,normals,texCoors,tangent);
|
||||
//初始化shader
|
||||
initShader(mv);
|
||||
}
|
||||
|
||||
//初始化顶点坐标与着色数据的方法
|
||||
public void initVertexData(float[] vertices,float[] normals,float texCoors[],float[] tangent)
|
||||
{
|
||||
//顶点坐标数据的初始化================begin============================
|
||||
vCount=vertices.length/3;
|
||||
|
||||
//创建顶点坐标数据缓冲
|
||||
//vertices.length*4是因为一个整数四个字节
|
||||
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
|
||||
vbb.order(ByteOrder.nativeOrder());//设置字节顺序
|
||||
mVertexBuffer = vbb.asFloatBuffer();//转换为Float型缓冲
|
||||
mVertexBuffer.put(vertices);//向缓冲区中放入顶点坐标数据
|
||||
mVertexBuffer.position(0);//设置缓冲区起始位置
|
||||
//特别提示：由于不同平台字节顺序不同数据单元不是字节的一定要经过ByteBuffer
|
||||
//转换，关键是要通过ByteOrder设置nativeOrder()，否则有可能会出问题
|
||||
//顶点坐标数据的初始化================end============================
|
||||
|
||||
//顶点法向量数据的初始化================begin============================
|
||||
ByteBuffer cbb = ByteBuffer.allocateDirect(normals.length*4);
|
||||
cbb.order(ByteOrder.nativeOrder());//设置字节顺序
|
||||
mNormalBuffer = cbb.asFloatBuffer();//转换为Float型缓冲
|
||||
mNormalBuffer.put(normals);//向缓冲区中放入顶点法向量数据
|
||||
mNormalBuffer.position(0);//设置缓冲区起始位置
|
||||
//特别提示：由于不同平台字节顺序不同数据单元不是字节的一定要经过ByteBuffer
|
||||
//转换，关键是要通过ByteOrder设置nativeOrder()，否则有可能会出问题
|
||||
//顶点着色数据的初始化================end============================
|
||||
|
||||
//顶点法向量数据的初始化================begin============================
|
||||
ByteBuffer tnbb = ByteBuffer.allocateDirect(tangent.length*4);
|
||||
tnbb.order(ByteOrder.nativeOrder());//设置字节顺序
|
||||
mTangentBuffer = tnbb.asFloatBuffer();//转换为Float型缓冲
|
||||
mTangentBuffer.put(tangent);//向缓冲区中放入顶点法向量数据
|
||||
mTangentBuffer.position(0);//设置缓冲区起始位置
|
||||
//特别提示：由于不同平台字节顺序不同数据单元不是字节的一定要经过ByteBuffer
|
||||
//转换，关键是要通过ByteOrder设置nativeOrder()，否则有可能会出问题
|
||||
//顶点着色数据的初始化================end============================
|
||||
|
||||
|
||||
//顶点纹理坐标数据的初始化================begin============================
|
||||
ByteBuffer tbb = ByteBuffer.allocateDirect(texCoors.length*4);
|
||||
tbb.order(ByteOrder.nativeOrder());//设置字节顺序
|
||||
mTexCoorBuffer = tbb.asFloatBuffer();//转换为Float型缓冲
|
||||
mTexCoorBuffer.put(texCoors);//向缓冲区中放入顶点纹理坐标数据
|
||||
mTexCoorBuffer.position(0);//设置缓冲区起始位置
|
||||
//特别提示：由于不同平台字节顺序不同数据单元不是字节的一定要经过ByteBuffer
|
||||
//转换，关键是要通过ByteOrder设置nativeOrder()，否则有可能会出问题
|
||||
//顶点纹理坐标数据的初始化================end============================
|
||||
}
|
||||
|
||||
//初始化shader
|
||||
public void initShader(MySurfaceView mv)
|
||||
{
|
||||
//加载顶点着色器的脚本内容
|
||||
mVertexShader=ShaderUtil.loadFromAssetsFile("vertex_ut.sh", mv.getResources());
|
||||
//加载片元着色器的脚本内容
|
||||
mFragmentShader=ShaderUtil.loadFromAssetsFile("frag_ut.sh", mv.getResources());
|
||||
//基于顶点着色器与片元着色器创建程序
|
||||
mProgram = ShaderUtil.createProgram(mVertexShader, mFragmentShader);
|
||||
//获取程序中顶点位置属性引用
|
||||
maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");
|
||||
//获取程序中顶点颜色属性引用
|
||||
maNormalHandle= GLES20.glGetAttribLocation(mProgram, "aNormal");
|
||||
//获取程序中顶点颜色属性引用
|
||||
maTangentHandle= GLES20.glGetAttribLocation(mProgram, "tNormal");
|
||||
//获取程序中总变换矩阵引用
|
||||
muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
|
||||
//获取位置、旋转变换矩阵引用
|
||||
muMMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMMatrix");
|
||||
//获取程序中光源位置引用
|
||||
maLightLocationHandle=GLES20.glGetUniformLocation(mProgram, "uLightLocation");
|
||||
//获取程序中顶点纹理坐标属性引用
|
||||
maTexCoorHandle= GLES20.glGetAttribLocation(mProgram, "aTexCoor");
|
||||
//获取程序中摄像机位置引用
|
||||
maCameraHandle=GLES20.glGetUniformLocation(mProgram, "uCamera");
|
||||
//获取外观、法线两个纹理引用
|
||||
uTexHandle=GLES20.glGetUniformLocation(mProgram, "sTextureWg");
|
||||
uNormalTexHandle=GLES20.glGetUniformLocation(mProgram, "sTextureNormal");
|
||||
}
|
||||
|
||||
public void drawSelf(int texId,int texIdNormal)
|
||||
{
|
||||
//制定使用某套着色器程序
|
||||
GLES20.glUseProgram(mProgram);
|
||||
//将最终变换矩阵传入着色器程序
|
||||
GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(), 0);
|
||||
//将位置、旋转变换矩阵传入着色器程序
|
||||
GLES20.glUniformMatrix4fv(muMMatrixHandle, 1, false, MatrixState.getMMatrix(), 0);
|
||||
//将光源位置传入着色器程序
|
||||
GLES20.glUniform3fv(maLightLocationHandle, 1, MatrixState.lightPositionFB);
|
||||
//将摄像机位置传入着色器程序
|
||||
GLES20.glUniform3fv(maCameraHandle, 1, MatrixState.cameraFB);
|
||||
//将顶点位置数据传入渲染管线
|
||||
GLES20.glVertexAttribPointer
|
||||
(
|
||||
maPositionHandle,
|
||||
3,
|
||||
GLES20.GL_FLOAT,
|
||||
false,
|
||||
3*4,
|
||||
mVertexBuffer
|
||||
);
|
||||
//将顶点法向量数据传入渲染管线
|
||||
GLES20.glVertexAttribPointer
|
||||
(
|
||||
maNormalHandle,
|
||||
3,
|
||||
GLES20.GL_FLOAT,
|
||||
false,
|
||||
3*4,
|
||||
mNormalBuffer
|
||||
);
|
||||
//将顶点切向量数据传入渲染管线
|
||||
GLES20.glVertexAttribPointer
|
||||
(
|
||||
maTangentHandle,
|
||||
3,
|
||||
GLES20.GL_FLOAT,
|
||||
false,
|
||||
3*4,
|
||||
mTangentBuffer
|
||||
);
|
||||
//将顶点纹理坐标数据传入渲染管线
|
||||
GLES20.glVertexAttribPointer
|
||||
(
|
||||
maTexCoorHandle,
|
||||
2,
|
||||
GLES20.GL_FLOAT,
|
||||
false,
|
||||
2*4,
|
||||
mTexCoorBuffer
|
||||
);
|
||||
//允许顶点位置、法向量、纹理坐标数据
|
||||
GLES20.glEnableVertexAttribArray(maPositionHandle);
|
||||
GLES20.glEnableVertexAttribArray(maNormalHandle);
|
||||
GLES20.glEnableVertexAttribArray(maTangentHandle);
|
||||
GLES20.glEnableVertexAttribArray(maTexCoorHandle);
|
||||
//绑定纹理
|
||||
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
|
||||
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texId);
|
||||
GLES20.glActiveTexture(GLES20.GL_TEXTURE1);
|
||||
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texIdNormal);
|
||||
GLES20.glUniform1i(uTexHandle, 0);
|
||||
GLES20.glUniform1i(uNormalTexHandle, 1);
|
||||
//绘制加载的物体
|
||||
GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,144 @@
|
||||
package com.bn.Sample15_6;
|
||||
|
||||
import java.nio.ByteBuffer;
|
||||
import java.nio.ByteOrder;
|
||||
import java.nio.FloatBuffer;
|
||||
import java.util.*;
|
||||
import android.opengl.Matrix;
|
||||
|
||||
//存储系统矩阵状态的类
|
||||
public class MatrixState
|
||||
{
|
||||
private static float[] mProjMatrix = new float[16];//4x4矩阵 投影用
|
||||
private static float[] mVMatrix = new float[16];//摄像机位置朝向9参数矩阵
|
||||
private static float[] currMatrix;//当前变换矩阵
|
||||
public static float[] lightLocation=new float[]{0,0,0};//定位光光源位置
|
||||
public static FloatBuffer cameraFB;
|
||||
public static FloatBuffer lightPositionFB;
|
||||
|
||||
public static Stack<float[]> mStack=new Stack<float[]>();//保护变换矩阵的栈
|
||||
|
||||
public static void setInitStack()//获取不变换初始矩阵
|
||||
{
|
||||
currMatrix=new float[16];
|
||||
Matrix.setRotateM(currMatrix, 0, 0, 1, 0, 0);
|
||||
}
|
||||
|
||||
public static void pushMatrix()//保护变换矩阵
|
||||
{
|
||||
mStack.push(currMatrix.clone());
|
||||
}
|
||||
|
||||
public static void popMatrix()//恢复变换矩阵
|
||||
{
|
||||
currMatrix=mStack.pop();
|
||||
}
|
||||
|
||||
public static void translate(float x,float y,float z)//设置沿xyz轴移动
|
||||
{
|
||||
Matrix.translateM(currMatrix, 0, x, y, z);
|
||||
}
|
||||
|
||||
public static void rotate(float angle,float x,float y,float z)//设置绕xyz轴移动
|
||||
{
|
||||
Matrix.rotateM(currMatrix,0,angle,x,y,z);
|
||||
}
|
||||
|
||||
|
||||
//设置摄像机
|
||||
public static void setCamera
|
||||
(
|
||||
float cx, //摄像机位置x
|
||||
float cy, //摄像机位置y
|
||||
float cz, //摄像机位置z
|
||||
float tx, //摄像机目标点x
|
||||
float ty, //摄像机目标点y
|
||||
float tz, //摄像机目标点z
|
||||
float upx, //摄像机UP向量X分量
|
||||
float upy, //摄像机UP向量Y分量
|
||||
float upz //摄像机UP向量Z分量
|
||||
)
|
||||
{
|
||||
Matrix.setLookAtM
|
||||
(
|
||||
mVMatrix,
|
||||
0,
|
||||
cx,
|
||||
cy,
|
||||
cz,
|
||||
tx,
|
||||
ty,
|
||||
tz,
|
||||
upx,
|
||||
upy,
|
||||
upz
|
||||
);
|
||||
|
||||
float[] cameraLocation=new float[3];//摄像机位置
|
||||
cameraLocation[0]=cx;
|
||||
cameraLocation[1]=cy;
|
||||
cameraLocation[2]=cz;
|
||||
|
||||
ByteBuffer llbb = ByteBuffer.allocateDirect(3*4);
|
||||
llbb.order(ByteOrder.nativeOrder());//设置字节顺序
|
||||
cameraFB=llbb.asFloatBuffer();
|
||||
cameraFB.put(cameraLocation);
|
||||
cameraFB.position(0);
|
||||
}
|
||||
|
||||
//设置透视投影参数
|
||||
public static void setProjectFrustum
|
||||
(
|
||||
float left, //near面的left
|
||||
float right, //near面的right
|
||||
float bottom, //near面的bottom
|
||||
float top, //near面的top
|
||||
float near, //near面距离
|
||||
float far //far面距离
|
||||
)
|
||||
{
|
||||
Matrix.frustumM(mProjMatrix, 0, left, right, bottom, top, near, far);
|
||||
}
|
||||
|
||||
//设置正交投影参数
|
||||
public static void setProjectOrtho
|
||||
(
|
||||
float left, //near面的left
|
||||
float right, //near面的right
|
||||
float bottom, //near面的bottom
|
||||
float top, //near面的top
|
||||
float near, //near面距离
|
||||
float far //far面距离
|
||||
)
|
||||
{
|
||||
Matrix.orthoM(mProjMatrix, 0, left, right, bottom, top, near, far);
|
||||
}
|
||||
|
||||
//获取具体物体的总变换矩阵
|
||||
public static float[] getFinalMatrix()
|
||||
{
|
||||
float[] mMVPMatrix=new float[16];
|
||||
Matrix.multiplyMM(mMVPMatrix, 0, mVMatrix, 0, currMatrix, 0);
|
||||
Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mMVPMatrix, 0);
|
||||
return mMVPMatrix;
|
||||
}
|
||||
|
||||
//获取具体物体的变换矩阵
|
||||
public static float[] getMMatrix()
|
||||
{
|
||||
return currMatrix;
|
||||
}
|
||||
|
||||
//设置灯光位置的方法
|
||||
public static void setLightLocation(float x,float y,float z)
|
||||
{
|
||||
lightLocation[0]=x;
|
||||
lightLocation[1]=y;
|
||||
lightLocation[2]=z;
|
||||
ByteBuffer llbb = ByteBuffer.allocateDirect(3*4);
|
||||
llbb.order(ByteOrder.nativeOrder());//设置字节顺序
|
||||
lightPositionFB=llbb.asFloatBuffer();
|
||||
lightPositionFB.put(lightLocation);
|
||||
lightPositionFB.position(0);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,158 @@
|
||||
package com.bn.Sample15_6;
|
||||
import java.io.IOException;
|
||||
import java.io.InputStream;
|
||||
|
||||
import android.opengl.GLSurfaceView;
|
||||
import android.opengl.GLES20;
|
||||
import android.opengl.GLUtils;
|
||||
import android.view.MotionEvent;
|
||||
import javax.microedition.khronos.egl.EGLConfig;
|
||||
import javax.microedition.khronos.opengles.GL10;
|
||||
import android.content.Context;
|
||||
import android.graphics.Bitmap;
|
||||
import android.graphics.BitmapFactory;
|
||||
|
||||
class MySurfaceView extends GLSurfaceView
|
||||
{
|
||||
private final float TOUCH_SCALE_FACTOR = 180.0f/320;//角度缩放比例
|
||||
private SceneRenderer mRenderer;//场景渲染器
|
||||
|
||||
private float mPreviousY;//上次的触控位置Y坐标
|
||||
private float mPreviousX;//上次的触控位置X坐标
|
||||
|
||||
int textureId;//系统分配的纹理id
|
||||
int textureIdNormal;//系统分配的纹理id
|
||||
|
||||
public MySurfaceView(Context context) {
|
||||
super(context);
|
||||
this.setEGLContextClientVersion(2); //设置使用OPENGL ES2.0
|
||||
mRenderer = new SceneRenderer(); //创建场景渲染器
|
||||
setRenderer(mRenderer); //设置渲染器
|
||||
setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);//设置渲染模式为主动渲染
|
||||
}
|
||||
|
||||
//触摸事件回调方法
|
||||
@Override
|
||||
public boolean onTouchEvent(MotionEvent e)
|
||||
{
|
||||
float y = e.getY();
|
||||
float x = e.getX();
|
||||
switch (e.getAction()) {
|
||||
case MotionEvent.ACTION_MOVE:
|
||||
float dy = y - mPreviousY;//计算触控笔Y位移
|
||||
float dx = x - mPreviousX;//计算触控笔X位移
|
||||
mRenderer.yAngle += dx * TOUCH_SCALE_FACTOR;//设置沿x轴旋转角度
|
||||
mRenderer.zAngle+= dy * TOUCH_SCALE_FACTOR;//设置沿z轴旋转角度
|
||||
requestRender();//重绘画面
|
||||
}
|
||||
mPreviousY = y;//记录触控笔位置
|
||||
mPreviousX = x;//记录触控笔位置
|
||||
return true;
|
||||
}
|
||||
|
||||
private class SceneRenderer implements GLSurfaceView.Renderer
|
||||
{
|
||||
float yAngle;//绕Y轴旋转的角度
|
||||
float zAngle; //绕Z轴旋转的角度
|
||||
//从指定的obj文件中加载对象
|
||||
LoadedObjectVertexNormalTexture lovo;
|
||||
|
||||
public void onDrawFrame(GL10 gl)
|
||||
{
|
||||
//清除深度缓冲与颜色缓冲
|
||||
GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
|
||||
|
||||
//坐标系推远
|
||||
MatrixState.pushMatrix();
|
||||
MatrixState.translate(0, 0f, -30f);
|
||||
//绕Y轴、Z轴旋转
|
||||
MatrixState.rotate(yAngle, 0, 1, 0);
|
||||
MatrixState.rotate(zAngle, 1, 0, 0);
|
||||
|
||||
//若加载的物体部位空则绘制物体
|
||||
if(lovo!=null)
|
||||
{
|
||||
lovo.drawSelf(textureId,textureIdNormal);
|
||||
}
|
||||
MatrixState.popMatrix();
|
||||
}
|
||||
|
||||
public void onSurfaceChanged(GL10 gl, int width, int height) {
|
||||
//设置视窗大小及位置
|
||||
GLES20.glViewport(0, 0, width, height);
|
||||
//计算GLSurfaceView的宽高比
|
||||
float ratio = (float) width / height;
|
||||
//调用此方法计算产生透视投影矩阵
|
||||
MatrixState.setProjectFrustum(-ratio, ratio, -1, 1, 2, 100);
|
||||
//调用此方法产生摄像机9参数位置矩阵
|
||||
MatrixState.setCamera(0,0,0,0f,0f,-1f,0f,1.0f,0.0f);
|
||||
}
|
||||
|
||||
public void onSurfaceCreated(GL10 gl, EGLConfig config)
|
||||
{
|
||||
//设置屏幕背景色RGBA
|
||||
GLES20.glClearColor(0.0f,0.0f,0.0f,1.0f);
|
||||
//打开深度检测
|
||||
GLES20.glEnable(GLES20.GL_DEPTH_TEST);
|
||||
//打开背面剪裁
|
||||
GLES20.glEnable(GLES20.GL_CULL_FACE);
|
||||
//初始化变换矩阵
|
||||
MatrixState.setInitStack();
|
||||
//初始化光源位置
|
||||
MatrixState.setLightLocation(40, 10, 20);
|
||||
//加载要绘制的物体
|
||||
lovo=LoadUtil.loadFromFile("ch_t.obj", MySurfaceView.this.getResources(),MySurfaceView.this);
|
||||
//加载纹理
|
||||
textureId=initTexture(R.drawable.zs);
|
||||
textureIdNormal=initTexture(R.drawable.gridnt);
|
||||
}
|
||||
}
|
||||
public int initTexture(int drawableId)//textureId
|
||||
{
|
||||
//生成纹理ID
|
||||
int[] textures = new int[1];
|
||||
GLES20.glGenTextures
|
||||
(
|
||||
1, //产生的纹理id的数量
|
||||
textures, //纹理id的数组
|
||||
0 //偏移量
|
||||
);
|
||||
int textureId=textures[0];
|
||||
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureId);
|
||||
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER,GLES20.GL_NEAREST);
|
||||
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MAG_FILTER,GLES20.GL_LINEAR);
|
||||
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S,GLES20.GL_REPEAT);
|
||||
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T,GLES20.GL_REPEAT);
|
||||
|
||||
//通过输入流加载图片===============begin===================
|
||||
InputStream is = this.getResources().openRawResource(drawableId);
|
||||
Bitmap bitmapTmp;
|
||||
try
|
||||
{
|
||||
bitmapTmp = BitmapFactory.decodeStream(is);
|
||||
}
|
||||
finally
|
||||
{
|
||||
try
|
||||
{
|
||||
is.close();
|
||||
}
|
||||
catch(IOException e)
|
||||
{
|
||||
e.printStackTrace();
|
||||
}
|
||||
}
|
||||
//通过输入流加载图片===============end=====================
|
||||
|
||||
//实际加载纹理
|
||||
GLUtils.texImage2D
|
||||
(
|
||||
GLES20.GL_TEXTURE_2D, //纹理类型，在OpenGL ES中必须为GL10.GL_TEXTURE_2D
|
||||
0, //纹理的层次，0表示基本图像层，可以理解为直接贴图
|
||||
bitmapTmp, //纹理图像
|
||||
0 //纹理边框尺寸
|
||||
);
|
||||
bitmapTmp.recycle(); //纹理加载成功后释放图片
|
||||
return textureId;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,66 @@
|
||||
package com.bn.Sample15_6;
|
||||
|
||||
import java.util.Set;
|
||||
//表示法向量的类，此类的一个对象表示一个法向量
|
||||
public class Normal
|
||||
{
|
||||
public static final float DIFF=0.0000001f;//判断两个法向量是否相同的阈值
|
||||
//法向量在XYZ轴上的分量
|
||||
float nx;
|
||||
float ny;
|
||||
float nz;
|
||||
|
||||
public Normal(float nx,float ny,float nz)
|
||||
{
|
||||
this.nx=nx;
|
||||
this.ny=ny;
|
||||
this.nz=nz;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean equals(Object o)
|
||||
{
|
||||
if(o instanceof Normal)
|
||||
{//若两个法向量XYZ三个分量的差都小于指定的阈值则认为这两个法向量相等
|
||||
Normal tn=(Normal)o;
|
||||
if(Math.abs(nx-tn.nx)<DIFF&&
|
||||
Math.abs(ny-tn.ny)<DIFF&&
|
||||
Math.abs(ny-tn.ny)<DIFF
|
||||
)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
else
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
//由于要用到HashSet，因此一定要重写hashCode方法
|
||||
@Override
|
||||
public int hashCode()
|
||||
{
|
||||
return 1;
|
||||
}
|
||||
|
||||
//求法向量平均值的工具方法
|
||||
public static float[] getAverage(Set<Normal> sn)
|
||||
{
|
||||
//存放法向量和的数组
|
||||
float[] result=new float[3];
|
||||
//把集合中所有的法向量求和
|
||||
for(Normal n:sn)
|
||||
{
|
||||
result[0]+=n.nx;
|
||||
result[1]+=n.ny;
|
||||
result[2]+=n.nz;
|
||||
}
|
||||
//将求和后的法向量规格化
|
||||
return LoadUtil.vectorNormal(result);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,42 @@
|
||||
package com.bn.Sample15_6;
|
||||
import android.app.Activity;
|
||||
import android.content.pm.ActivityInfo;
|
||||
import android.os.Bundle;
|
||||
import android.view.Window;
|
||||
import android.view.WindowManager;
|
||||
|
||||
public class Sample15_6_Activity extends Activity {
|
||||
private MySurfaceView mGLSurfaceView;
|
||||
@Override
|
||||
protected void onCreate(Bundle savedInstanceState)
|
||||
{
|
||||
super.onCreate(savedInstanceState);
|
||||
//设置为全屏
|
||||
requestWindowFeature(Window.FEATURE_NO_TITLE);
|
||||
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,
|
||||
WindowManager.LayoutParams.FLAG_FULLSCREEN);
|
||||
//设置为横屏模式
|
||||
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
|
||||
|
||||
//初始化GLSurfaceView
|
||||
mGLSurfaceView = new MySurfaceView(this);
|
||||
setContentView(mGLSurfaceView);
|
||||
mGLSurfaceView.requestFocus();//获取焦点
|
||||
mGLSurfaceView.setFocusableInTouchMode(true);//设置为可触控
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onResume() {
|
||||
super.onResume();
|
||||
mGLSurfaceView.onResume();
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onPause() {
|
||||
super.onPause();
|
||||
mGLSurfaceView.onPause();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
@@ -0,0 +1,126 @@
|
||||
package com.bn.Sample15_6;
|
||||
|
||||
import java.io.ByteArrayOutputStream;
|
||||
import java.io.InputStream;
|
||||
|
||||
import android.content.res.Resources;
|
||||
import android.opengl.GLES20;
|
||||
import android.util.Log;
|
||||
|
||||
//加载顶点Shader与片元Shader的工具类
|
||||
public class ShaderUtil
|
||||
{
|
||||
//加载制定shader的方法
|
||||
public static int loadShader
|
||||
(
|
||||
int shaderType, //shader的类型 GLES20.GL_VERTEX_SHADER GLES20.GL_FRAGMENT_SHADER
|
||||
String source //shader的脚本字符串
|
||||
)
|
||||
{
|
||||
//创建一个新shader
|
||||
int shader = GLES20.glCreateShader(shaderType);
|
||||
//若创建成功则加载shader
|
||||
if (shader != 0)
|
||||
{
|
||||
//加载shader的源代码
|
||||
GLES20.glShaderSource(shader, source);
|
||||
//编译shader
|
||||
GLES20.glCompileShader(shader);
|
||||
//存放编译成功shader数量的数组
|
||||
int[] compiled = new int[1];
|
||||
//获取Shader的编译情况
|
||||
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
|
||||
if (compiled[0] == 0)
|
||||
{//若编译失败则显示错误日志并删除此shader
|
||||
Log.e("ES20_ERROR", "Could not compile shader " + shaderType + ":");
|
||||
Log.e("ES20_ERROR", GLES20.glGetShaderInfoLog(shader));
|
||||
GLES20.glDeleteShader(shader);
|
||||
shader = 0;
|
||||
}
|
||||
}
|
||||
return shader;
|
||||
}
|
||||
|
||||
//创建shader程序的方法
|
||||
public static int createProgram(String vertexSource, String fragmentSource)
|
||||
{
|
||||
//加载顶点着色器
|
||||
int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
|
||||
if (vertexShader == 0)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
//加载片元着色器
|
||||
int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
|
||||
if (pixelShader == 0)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
//创建程序
|
||||
int program = GLES20.glCreateProgram();
|
||||
//若程序创建成功则向程序中加入顶点着色器与片元着色器
|
||||
if (program != 0)
|
||||
{
|
||||
//向程序中加入顶点着色器
|
||||
GLES20.glAttachShader(program, vertexShader);
|
||||
checkGlError("glAttachShader");
|
||||
//向程序中加入片元着色器
|
||||
GLES20.glAttachShader(program, pixelShader);
|
||||
checkGlError("glAttachShader");
|
||||
//链接程序
|
||||
GLES20.glLinkProgram(program);
|
||||
//存放链接成功program数量的数组
|
||||
int[] linkStatus = new int[1];
|
||||
//获取program的链接情况
|
||||
GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0);
|
||||
//若链接失败则报错并删除程序
|
||||
if (linkStatus[0] != GLES20.GL_TRUE)
|
||||
{
|
||||
Log.e("ES20_ERROR", "Could not link program: ");
|
||||
Log.e("ES20_ERROR", GLES20.glGetProgramInfoLog(program));
|
||||
GLES20.glDeleteProgram(program);
|
||||
program = 0;
|
||||
}
|
||||
}
|
||||
return program;
|
||||
}
|
||||
|
||||
//检查每一步操作是否有错误的方法
|
||||
public static void checkGlError(String op)
|
||||
{
|
||||
int error;
|
||||
while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR)
|
||||
{
|
||||
Log.e("ES20_ERROR", op + ": glError " + error);
|
||||
throw new RuntimeException(op + ": glError " + error);
|
||||
}
|
||||
}
|
||||
|
||||
//从sh脚本中加载shader内容的方法
|
||||
public static String loadFromAssetsFile(String fname,Resources r)
|
||||
{
|
||||
String result=null;
|
||||
try
|
||||
{
|
||||
InputStream in=r.getAssets().open(fname);
|
||||
int ch=0;
|
||||
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
||||
while((ch=in.read())!=-1)
|
||||
{
|
||||
baos.write(ch);
|
||||
}
|
||||
byte[] buff=baos.toByteArray();
|
||||
baos.close();
|
||||
in.close();
|
||||
result=new String(buff,"UTF-8");
|
||||
result=result.replaceAll("\\r\\n","\n");
|
||||
}
|
||||
catch(Exception e)
|
||||
{
|
||||
e.printStackTrace();
|
||||
}
|
||||
return result;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user