徐州高端网站建设,珠海网站策划,网站设计步骤详解,形象设计公司网站建设方案书1 前言 本文通过一个立方体贴图的例子#xff0c;讲解三维纹理贴图#xff08;子网格贴图#xff09;的应用#xff0c;案例中使用 6 张不同的图片给立方体贴图#xff0c;图片如下。 读者如果对 Filament 不太熟悉#xff0c;请回顾以下内容。
Filament环境搭建绘制三角…1 前言 本文通过一个立方体贴图的例子讲解三维纹理贴图子网格贴图的应用案例中使用 6 张不同的图片给立方体贴图图片如下。 读者如果对 Filament 不太熟悉请回顾以下内容。
Filament环境搭建绘制三角形绘制矩形绘制圆形绘制立方体纹理贴图
2 立方体贴图 本文项目结构如下完整代码资源 → Filament立方体贴图6张图。 2.1 基础类 为方便读者将注意力聚焦在 Filament 的输入上轻松配置复杂的环境依赖逻辑笔者仿照 OpenGL ES 的写法抽出了 FLSurfaceView、BaseModel、Mesh、MaterialUtils 和 TextureUtils 类。FLSurfaceView 与 GLSurfaceView 的功能类似承载了渲染环境配置BaseModel 用于管理模型的网格和材质Mesh 用于管理模型的顶点属性MaterialUtils 和 TextureUtils 中分别提供了一些材质和纹理相关的工具。 build.gradle
...
android {...aaptOptions { // 在应用程序打包过程中不压缩的文件noCompress filamat, ktx}
}dependencies {implementation fileTree(dir: ../libs, include: [*.aar])...
} 说明在项目根目录下的 libs 目录中需要放入以下 aar 文件它们源自Filament环境搭建中编译生成的 aar。 FLSurfaceView.java
package com.zhyan8.multitexture.filament;import android.content.Context;
import android.graphics.Point;
import android.view.Choreographer;
import android.view.Surface;
import android.view.SurfaceView;import com.google.android.filament.Camera;
import com.google.android.filament.Engine;
import com.google.android.filament.EntityManager;
import com.google.android.filament.Filament;
import com.google.android.filament.Renderer;
import com.google.android.filament.Scene;
import com.google.android.filament.Skybox;
import com.google.android.filament.SwapChain;
import com.google.android.filament.View;
import com.google.android.filament.Viewport;
import com.google.android.filament.android.DisplayHelper;
import com.google.android.filament.android.FilamentHelper;
import com.google.android.filament.android.UiHelper;import java.util.ArrayList;/** Filament中待渲染的SurfaceView* 功能可以类比OpenGL ES中的GLSurfaceView* 用于创建Filament的渲染环境*/
public class FLSurfaceView extends SurfaceView {public static int RENDERMODE_WHEN_DIRTY 0; // 用户请求渲染才渲染一帧public static int RENDERMODE_CONTINUOUSLY 1; // 持续渲染protected int mRenderMode RENDERMODE_CONTINUOUSLY; // 渲染模式protected Choreographer mChoreographer; // 消息控制protected DisplayHelper mDisplayHelper; // 管理Display(可以监听分辨率或刷新率的变化)protected UiHelper mUiHelper; // 管理SurfaceView、TextureView、SurfaceHolderprotected Engine mEngine; // 引擎(跟踪用户创建的资源, 管理渲染线程和硬件渲染器)protected Renderer mRenderer; // 渲染器(用于操作系统窗口, 生成绘制命令, 管理帧延时)protected Scene mScene; // 场景(管理渲染对象、灯光)protected View mView; // 存储渲染数据(View是Renderer操作的对象)protected Camera mCamera; // 相机(视角管理)protected Point mDesiredSize; // 渲染分辨率protected float[] mSkyboxColor; // 背景颜色protected SwapChain mSwapChain; // 操作系统的本地可渲染表面(native renderable surface, 通常是一个window或view)protected FrameCallback mFrameCallback new FrameCallback(); // 帧回调protected ArrayListRenderCallback mRenderCallbacks; // 每一帧渲染前的回调(一般用于处理模型变换、相机变换等)static {Filament.init();}public FLSurfaceView(Context context) {super(context);mChoreographer Choreographer.getInstance();mDisplayHelper new DisplayHelper(context);mRenderCallbacks new ArrayList();}public void init() { // 初始化setupSurfaceView();setupFilament();setupView();setupScene();}public void setRenderMode(int renderMode) { // 设置渲染模式mRenderMode renderMode;}public void addRenderCallback(RenderCallback renderCallback) { // 添加渲染回调if (renderCallback ! null) {mRenderCallbacks.add(renderCallback);}}public void requestRender() { // 请求渲染mChoreographer.postFrameCallback(mFrameCallback);}public void onResume() { // 恢复mChoreographer.postFrameCallback(mFrameCallback);}public void onPause() { // 暂停mChoreographer.removeFrameCallback(mFrameCallback);}public void onDestroy() { // 销毁Filament环境mChoreographer.removeFrameCallback(mFrameCallback);mRenderCallbacks.clear();mUiHelper.detach();mEngine.destroyRenderer(mRenderer);mEngine.destroyView(mView);mEngine.destroyScene(mScene);mEngine.destroyCameraComponent(mCamera.getEntity());EntityManager entityManager EntityManager.get();entityManager.destroy(mCamera.getEntity());mEngine.destroy();}protected void setupScene() { // 设置Scene参数}protected void onResized(int width, int height) { // Surface尺寸变化时回调double zoom 1;double aspect (double) width / (double) height;mCamera.setProjection(Camera.Projection.ORTHO,-aspect * zoom, aspect * zoom, -zoom, zoom, 0, 1000);}private void setupSurfaceView() { // 设置SurfaceViewmUiHelper new UiHelper(UiHelper.ContextErrorPolicy.DONT_CHECK);mUiHelper.setRenderCallback(new SurfaceCallback());if (mDesiredSize ! null) {mUiHelper.setDesiredSize(mDesiredSize.x, mDesiredSize.y);}mUiHelper.attachTo(this);}private void setupFilament() { // 设置Filament参数mEngine Engine.create();// mEngine (new Engine.Builder()).featureLevel(Engine.FeatureLevel.FEATURE_LEVEL_0).build();mRenderer mEngine.createRenderer();mScene mEngine.createScene();mView mEngine.createView();mCamera mEngine.createCamera(mEngine.getEntityManager().create());}private void setupView() { // 设置View参数float[] color mSkyboxColor ! null ? mSkyboxColor : new float[] {0, 0, 0, 1};Skybox skybox (new Skybox.Builder()).color(color).build(mEngine);mScene.setSkybox(skybox);if (mEngine.getActiveFeatureLevel() Engine.FeatureLevel.FEATURE_LEVEL_0) {mView.setPostProcessingEnabled(false); // FEATURE_LEVEL_0不支持post-processing}mView.setCamera(mCamera);mView.setScene(mScene);}/** 帧回调*/private class FrameCallback implements Choreographer.FrameCallback {Overridepublic void doFrame(long frameTimeNanos) { // 渲染每帧数据if (mRenderMode RENDERMODE_CONTINUOUSLY) {mChoreographer.postFrameCallback(this); // 请求下一帧}mRenderCallbacks.forEach(callback - callback.onCall());if (mUiHelper.isReadyToRender()) {if (mRenderer.beginFrame(mSwapChain, frameTimeNanos)) {mRenderer.render(mView);mRenderer.endFrame();}}}}/** Surface回调*/private class SurfaceCallback implements UiHelper.RendererCallback {Overridepublic void onNativeWindowChanged(Surface surface) { // Native窗口改变时回调if (mSwapChain ! null) {mEngine.destroySwapChain(mSwapChain);}long flags mUiHelper.getSwapChainFlags();if (mEngine.getActiveFeatureLevel() Engine.FeatureLevel.FEATURE_LEVEL_0) {if (SwapChain.isSRGBSwapChainSupported(mEngine)) {flags flags | SwapChain.CONFIG_SRGB_COLORSPACE;}}mSwapChain mEngine.createSwapChain(surface, flags);mDisplayHelper.attach(mRenderer, getDisplay());}Overridepublic void onDetachedFromSurface() { // 解绑Surface时回调mDisplayHelper.detach();if (mSwapChain ! null) {mEngine.destroySwapChain(mSwapChain);mEngine.flushAndWait();mSwapChain null;}}Overridepublic void onResized(int width, int height) { // Surface尺寸变化时回调mView.setViewport(new Viewport(0, 0, width, height));FilamentHelper.synchronizePendingFrames(mEngine);FLSurfaceView.this.onResized(width, height);}}/** 每一帧渲染前的回调* 一般用于处理模型变换、相机变换等*/public static interface RenderCallback {void onCall();}
} BaseModel.java
package com.zhyan8.multitexture.filament;import android.content.Context;import com.google.android.filament.Box;
import com.google.android.filament.Engine;
import com.google.android.filament.EntityManager;
import com.google.android.filament.Material;
import com.google.android.filament.MaterialInstance;
import com.google.android.filament.RenderableManager;
import com.google.android.filament.RenderableManager.PrimitiveType;
import com.google.android.filament.Texture;
import com.google.android.filament.TransformManager;import com.zhyan8.multitexture.filament.Mesh.SubMesh;
import com.zhyan8.multitexture.filament.utils.MaterialUtils;
import com.zhyan8.multitexture.filament.utils.TextureUtils;/** 模型基类* 管理模型的网格、材质、渲染id*/
public class BaseModel {private static String TAG BaseModel;protected Context mContext; // 上下文protected Engine mEngine; // Filament引擎protected TransformManager mTransformManager; // 模型变换管理器protected Mesh mMesh; // 模型网格protected SubMesh[] mSubMeshes; // 子网格protected Material[] mMaterials; // 模型材质protected MaterialInstance[] mMaterialInstances; // 模型材质实例protected Texture[] mTextures; // 纹理protected int mRenderable; // 渲染idprotected int mTransformComponent; // 模型变换组件的idprotected Box mBox; // 渲染区域protected FLSurfaceView.RenderCallback mRenderCallback; // 每一帧渲染前的回调(一般用于处理模型变换、相机变换等)public BaseModel(Context context, Engine engine) {mContext context;mEngine engine;mTransformManager mEngine.getTransformManager();}public int getRenderable() { // 获取渲染idreturn mRenderable;}public FLSurfaceView.RenderCallback getRenderCallback() { // 获取渲染回调return mRenderCallback;}public void destroy() { // 销毁模型mEngine.destroyEntity(mRenderable);if (mMesh ! null) {mMesh.destroy();}if (mTextures ! null) {for (int i 0; i mTextures.length; i) {mEngine.destroyTexture(mTextures[i]);}}if (mMaterialInstances ! null) {for (int i 0; i mMaterialInstances.length; i) {mEngine.destroyMaterialInstance(mMaterialInstances[i]);}}if (mMaterials ! null) {for (int i 0; i mMaterials.length; i) {mEngine.destroyMaterial(mMaterials[i]);}}EntityManager entityManager EntityManager.get();entityManager.destroy(mRenderable);}protected int getRenderable(PrimitiveType primitiveType, int vertexCount) { // 获取渲染idint renderable EntityManager.get().create();if (mSubMeshes null) {mSubMeshes new SubMesh[] {new SubMesh(0, 0, vertexCount - 1, vertexCount)};}RenderableManager.Builder builder new RenderableManager.Builder(mSubMeshes.length).boundingBox(mBox);for (int i 0; i mSubMeshes.length; i) {builder.geometry(i, primitiveType, mMesh.getVertexBuffer(), mMesh.getIndexBuffer(),mSubMeshes[i].offset, mSubMeshes[i].minIndex, mSubMeshes[i].maxIndex, mSubMeshes[i].indexCount).material(i, mMaterialInstances[i]);}builder.build(mEngine, renderable);return renderable;}protected Material[] loadMaterials(String materialPath) { // 加载材质Material material MaterialUtils.loadMaterial(mContext, mEngine, materialPath);if (material ! null) {return new Material[] {material};}return null;}protected Material[] loadMaterials(String[] materialPaths) { // 加载材质Material[] materials new Material[materialPaths.length];for (int i 0; i materials.length; i) {materials[i] MaterialUtils.loadMaterial(mContext, mEngine, materialPaths[i]);}return materials;}protected MaterialInstance[] getMaterialInstance(Material[] materials) { // 获取材质实例MaterialInstance[] materialInstances new MaterialInstance[materials.length];for (int i 0; i materials.length; i) {materialInstances[i] materials[i].createInstance();}return materialInstances;}protected MaterialInstance[] getMaterialInstance(Material material, int count) { // 获取材质实例MaterialInstance[] materialInstances new MaterialInstance[count];for (int i 0; i count; i) {materialInstances[i] material.createInstance();}return materialInstances;}protected Texture[] loadTextures(String texturePath) { // 加载纹理Texture texture TextureUtils.getTexture(mContext, mEngine, texturePath);if (texture ! null) {return new Texture[] {texture};}return null;}protected Texture[] loadTextures(String[] texturePaths) { // 加载纹理Texture[] textures new Texture[texturePaths.length];for (int i 0; i textures.length; i) {textures[i] TextureUtils.getTexture(mContext, mEngine, texturePaths[i]);}return textures;}
} Mesh.java
package com.zhyan8.multitexture.filament;import com.google.android.filament.Engine;
import com.google.android.filament.IndexBuffer;
import com.google.android.filament.VertexBuffer;
import com.google.android.filament.VertexBuffer.AttributeType;
import com.google.android.filament.VertexBuffer.VertexAttribute;import java.nio.ByteBuffer;
import java.nio.ByteOrder;/** 网格* 用于管理模型的顶点属性和顶点索引*/
public class Mesh {private Engine mEngine; // Filament引擎private VertexBuffer mVertexBuffer; // 顶点属性缓存private IndexBuffer mIndexBuffer; // 顶点索引缓存public Mesh(Engine engine) {mEngine engine;}public Mesh(Engine engine, float[] vertices, short[] indices) {mEngine engine;setVertices(vertices);setIndices(indices);}public Mesh(Engine engine, VertexPosCol[] vertices, short[] indices) {mEngine engine;setVertices(vertices);setIndices(indices);}public Mesh(Engine engine, VertexPosUV[] vertices, short[] indices) {mEngine engine;setVertices(vertices);setIndices(indices);}public void setVertices(float[] vertices) { // 设置顶点属性mVertexBuffer getVertexBuffer(vertices);}public void setVertices(VertexPosCol[] vertices) { // 设置顶点属性mVertexBuffer getVertexBuffer(vertices);}public void setVertices(VertexPosUV[] vertices) { // 设置顶点属性mVertexBuffer getVertexBuffer(vertices);}public void setIndices(short[] indices) { // 设置顶点索引mIndexBuffer getIndexBuffer(indices);}public VertexBuffer getVertexBuffer() { // 获取顶点属性缓存return mVertexBuffer;}public IndexBuffer getIndexBuffer() { // 获取顶点索引缓存return mIndexBuffer;}public void destroy() {mEngine.destroyVertexBuffer(mVertexBuffer);mEngine.destroyIndexBuffer(mIndexBuffer);}private VertexBuffer getVertexBuffer(float[] values) { // 获取顶点属性缓存ByteBuffer vertexData getByteBuffer(values);int vertexCount values.length / 3;int vertexSize Float.BYTES * 3;VertexBuffer vertexBuffer new VertexBuffer.Builder().bufferCount(1).vertexCount(vertexCount).attribute(VertexBuffer.VertexAttribute.POSITION, 0, VertexBuffer.AttributeType.FLOAT3, 0, vertexSize).build(mEngine);vertexBuffer.setBufferAt(mEngine, 0, vertexData);return vertexBuffer;}private VertexBuffer getVertexBuffer(VertexPosCol[] values) { // 获取顶点属性缓存ByteBuffer vertexData getByteBuffer(values);int vertexCount values.length;int vertexSize VertexPosCol.BYTES;VertexBuffer vertexBuffer new VertexBuffer.Builder().bufferCount(1).vertexCount(vertexCount).attribute(VertexAttribute.POSITION, 0, AttributeType.FLOAT3, 0, vertexSize).attribute(VertexAttribute.COLOR, 0, AttributeType.UBYTE4, 3 * Float.BYTES, vertexSize).normalized(VertexBuffer.VertexAttribute.COLOR).build(mEngine);vertexBuffer.setBufferAt(mEngine, 0, vertexData);return vertexBuffer;}private VertexBuffer getVertexBuffer(VertexPosUV[] values) { // 获取顶点属性缓存ByteBuffer vertexData getByteBuffer(values);int vertexCount values.length;int vertexSize VertexPosUV.BYTES;VertexBuffer vertexBuffer new VertexBuffer.Builder().bufferCount(1).vertexCount(vertexCount).attribute(VertexBuffer.VertexAttribute.POSITION, 0, VertexBuffer.AttributeType.FLOAT3, 0, vertexSize).attribute(VertexBuffer.VertexAttribute.UV0, 0, VertexBuffer.AttributeType.FLOAT2, 3 * Float.BYTES, vertexSize).build(mEngine);vertexBuffer.setBufferAt(mEngine, 0, vertexData);return vertexBuffer;}private IndexBuffer getIndexBuffer(short[] values) { // 获取顶点索引缓存ByteBuffer indexData getByteBuffer(values);int indexCount values.length;IndexBuffer indexBuffer new IndexBuffer.Builder().indexCount(indexCount).bufferType(IndexBuffer.Builder.IndexType.USHORT).build(mEngine);indexBuffer.setBuffer(mEngine, indexData);return indexBuffer;}private ByteBuffer getByteBuffer(float[] values) { // float数组转换为ByteBufferByteBuffer byteBuffer ByteBuffer.allocate(values.length * Float.BYTES);byteBuffer.order(ByteOrder.nativeOrder());for (int i 0; i values.length; i) {byteBuffer.putFloat(values[i]);}byteBuffer.flip();return byteBuffer;}private ByteBuffer getByteBuffer(short[] values) { // short数组转换为ByteBufferByteBuffer byteBuffer ByteBuffer.allocate(values.length * Short.BYTES);byteBuffer.order(ByteOrder.nativeOrder());for (int i 0; i values.length; i) {byteBuffer.putShort(values[i]);}byteBuffer.flip();return byteBuffer;}private ByteBuffer getByteBuffer(VertexPosCol[] values) { // VertexPosCol数组转换为ByteBufferByteBuffer byteBuffer ByteBuffer.allocate(values.length * VertexPosCol.BYTES);byteBuffer.order(ByteOrder.nativeOrder());for (int i 0; i values.length; i) {values[i].put(byteBuffer);}byteBuffer.flip();return byteBuffer;}private ByteBuffer getByteBuffer(VertexPosUV[] values) { // VertexPosUV数组转换为ByteBufferByteBuffer byteBuffer ByteBuffer.allocate(values.length * VertexPosUV.BYTES);byteBuffer.order(ByteOrder.nativeOrder());for (int i 0; i values.length; i) {values[i].put(byteBuffer);}byteBuffer.flip();return byteBuffer;}/** 子网格*/public static class SubMesh {public int offset;public int minIndex;public int maxIndex;public int indexCount;public SubMesh() {}public SubMesh(int offset, int minIndex, int maxIndex, int indexCount) {this.offset offset;this.minIndex minIndex;this.maxIndex maxIndex;this.indexCount indexCount;}}/** 顶点数据(位置颜色)* 包含顶点位置和颜色*/public static class VertexPosCol {public static int BYTES 16;public float x;public float y;public float z;public int color;public VertexPosCol() {}public VertexPosCol(float x, float y, float z, int color) {this.x x;this.y y;this.z z;this.color color;}public ByteBuffer put(ByteBuffer buffer) { // VertexPosCol转换为ByteBufferbuffer.putFloat(x);buffer.putFloat(y);buffer.putFloat(z);buffer.putInt(color);return buffer;}}/** 顶点数据(位置纹理坐标)* 包含顶点位置和纹理坐标*/public static class VertexPosUV {public static int BYTES 20;public float x;public float y;public float z;public float u;public float v;public VertexPosUV() {}public VertexPosUV(float x, float y, float z, float u, float v) {this.x x;this.y y;this.z z;this.u u;this.v v;}public ByteBuffer put(ByteBuffer buffer) { // VertexPosUV转换为ByteBufferbuffer.putFloat(x);buffer.putFloat(y);buffer.putFloat(z);buffer.putFloat(u);buffer.putFloat(v);return buffer;}}
} MaterialUtils.java
package com.zhyan8.multitexture.filament.utils;import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;import com.google.android.filament.Engine;
import com.google.android.filament.Material;import java.io.FileInputStream;
import java.io.IOException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;/** 材质工具类*/
public class MaterialUtils {private static String TAG MaterialUtils;public static Material loadMaterial(Context context, Engine engine, String materialPath) { // 加载材质Buffer buffer readUncompressedAsset(context, materialPath);if (buffer ! null) {Material material (new Material.Builder()).payload(buffer, buffer.remaining()).build(engine);material.compile(Material.CompilerPriorityQueue.HIGH,Material.UserVariantFilterBit.ALL,new Handler(Looper.getMainLooper()),() - Log.i(TAG, Material material.getName() compiled.));engine.flush();return material;}return null;}private static Buffer readUncompressedAsset(Context context, String assetPath) { // 加载资源ReadableByteChannel src null;FileInputStream fis null;ByteBuffer dist null;try {AssetFileDescriptor fd context.getAssets().openFd(assetPath);fis fd.createInputStream();dist ByteBuffer.allocate((int) fd.getLength());src Channels.newChannel(fis);src.read(dist);} catch (IOException e) {e.printStackTrace();} finally {if (src ! null) {try {src.close();} catch (IOException e) {e.printStackTrace();}}if (fis ! null) {try {fis.close();} catch (IOException e) {e.printStackTrace();}}}if (dist ! null) {return dist.rewind();}return null;}
} TextureUtils.java
package com.zhyan8.multitexture.filament.utils;import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.util.Log;import com.google.android.filament.Engine;
import com.google.android.filament.Texture;
import com.google.android.filament.android.TextureHelper;import java.io.IOException;
import java.io.InputStream;/** 纹理工具类*/
public class TextureUtils {private static String TAG TextureUtils;public static Texture getTexture(Context context, Engine engine, String texturePath) { // 获取TextureBitmap bitmap loadBitmapFromAsset(context, texturePath);if (bitmap ! null) {return generateTexture(engine, bitmap);}return null;}public static Texture getTexture(Context context, Engine engine, int resourceId) { // 获取TextureBitmap bitmap loadBitmapFromDrawable(context, resourceId);if (bitmap ! null) {return generateTexture(engine, bitmap);}return null;}private static Texture generateTexture(Engine engine, Bitmap bitmap) { // 生成TextureTexture texture new Texture.Builder().width(bitmap.getWidth()).height(bitmap.getHeight()).sampler(Texture.Sampler.SAMPLER_2D).format(Texture.InternalFormat.SRGB8_A8).levels(0xff).build(engine);TextureHelper.setBitmap(engine, texture, 0, bitmap, new Handler(), () -Log.i(TAG, getTexture, Bitmap is released.));texture.generateMipmaps(engine);return texture;}private static Bitmap loadBitmapFromAsset(Context context, String assetPath) { // 从asset中加载bitmapInputStream inputStream null;Bitmap bitmap null;try {inputStream context.getAssets().open(assetPath);bitmap BitmapFactory.decodeStream(inputStream);} catch (IOException e) {e.printStackTrace();} finally {if (inputStream ! null) {try {inputStream.close();} catch (IOException e) {e.printStackTrace();}}}return bitmap;}private static Bitmap loadBitmapFromDrawable(Context context, int resourceId) { // 从drawable中加载bitmapBitmapFactory.Options options new BitmapFactory.Options();options.inPremultiplied true;Bitmap bitmap BitmapFactory.decodeResource(context.getResources(), resourceId, options);return bitmap;}
}
2.2 业务类 MainActivity.java
package com.zhyan8.multitexture;import android.os.Bundle;import androidx.appcompat.app.AppCompatActivity;import com.zhyan8.multitexture.filament.FLSurfaceView;public class MainActivity extends AppCompatActivity {private FLSurfaceView mFLSurfaceView;Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mFLSurfaceView new MyFLSurfaceView(this);setContentView(mFLSurfaceView);mFLSurfaceView.init();mFLSurfaceView.setRenderMode(FLSurfaceView.RENDERMODE_CONTINUOUSLY);}Overridepublic void onResume() {super.onResume();mFLSurfaceView.onResume();}Overridepublic void onPause() {super.onPause();mFLSurfaceView.onPause();}Overridepublic void onDestroy() {super.onDestroy();mFLSurfaceView.onDestroy();}
} MyFLSurfaceView.java
package com.zhyan8.multitexture;import android.content.Context;import com.google.android.filament.Camera;
import com.zhyan8.multitexture.filament.BaseModel;
import com.zhyan8.multitexture.filament.FLSurfaceView;public class MyFLSurfaceView extends FLSurfaceView {private BaseModel mMyModel;public MyFLSurfaceView(Context context) {super(context);}public void init() {mSkyboxColor new float[] {0.35f, 0.35f, 0.35f, 1};super.init();}Overridepublic void onDestroy() {mMyModel.destroy();super.onDestroy();}Overrideprotected void setupScene() { // 设置Scene参数mMyModel new Cube(getContext(), mEngine);mScene.addEntity(mMyModel.getRenderable());addRenderCallback(mMyModel.getRenderCallback());}Overrideprotected void onResized(int width, int height) {double zoom 0.25;double aspect (double) width / (double) height;mCamera.setProjection(Camera.Projection.PERSPECTIVE,-aspect * zoom, aspect * zoom, -zoom, zoom, 0.3, 100);float[] eye new float[] {1, 1, 1.5f};float[] center new float[] {0, 0, 0};float[] up new float[] {0, 1, 0};mCamera.lookAt(eye[0], eye[1], eye[2],center[0], center[1], center[2], up[0], up[1], up[2]);}
} Cube.java
package com.zhyan8.multitexture;import android.content.Context;
import android.opengl.Matrix;import com.google.android.filament.Box;
import com.google.android.filament.Engine;
import com.google.android.filament.RenderableManager.PrimitiveType;
import com.google.android.filament.TextureSampler;
import com.zhyan8.multitexture.filament.BaseModel;
import com.zhyan8.multitexture.filament.Mesh;
import com.zhyan8.multitexture.filament.Mesh.SubMesh;
import com.zhyan8.multitexture.filament.Mesh.VertexPosUV;public class Cube extends BaseModel {private String materialPaths materials/square.filamat;private String[] texturePaths new String[] {textures/a1.jpg, textures/a2.jpg, textures/a3.jpg,textures/a4.jpg, textures/a6.jpg, textures/a5.jpg};private VertexPosUV[] mVertices; // 顶点坐标private short[] mIndices; // 顶点索引private float[] mModelMatrix; // 模型变换矩阵private float[] mRotateAxis; // 旋转轴private float mRotateAgree 0; // 旋转角度public Cube(Context context, Engine engine) {super(context, engine);init();}private void init() {mBox new Box(0.0f, 0.0f, 0.0f, 2.0f, 2.0f, 2.0f);mVertices getVertices(0.5f);mIndices getIndices();mMesh new Mesh(mEngine, mVertices, mIndices);mSubMeshes getSubMesh();mTextures loadTextures(texturePaths);mMaterials loadMaterials(materialPaths);mMaterialInstances getMaterialInstance(mMaterials[0], mTextures.length);TextureSampler textureSampler new TextureSampler();for (int i 0; i mMaterialInstances.length; i) {mMaterialInstances[i].setParameter(mainTex, mTextures[i], textureSampler);}mRenderable getRenderable(PrimitiveType.TRIANGLES, mIndices.length);mTransformComponent mTransformManager.getInstance(mRenderable);mRenderCallback () - renderCallback();mModelMatrix new float[16];mRotateAxis new float[] { 0.5f, 1f, 1f };}private void renderCallback() {mRotateAgree (mRotateAgree 1) % 360;mRotateAxis[0] mRotateAgree / 180f - 1;mRotateAxis[1] (float) Math.sin(mRotateAgree / 180f * Math.PI * 0.7f);mRotateAxis[2] (float) Math.cos(mRotateAgree / 180f * Math.PI * 0.5f);Matrix.setRotateM(mModelMatrix, 0, mRotateAgree, mRotateAxis[0], mRotateAxis[1], mRotateAxis[2]);mTransformManager.setTransform(mTransformComponent, mModelMatrix);}private VertexPosUV[] getVertices(float r) {VertexPosUV[] vertices new VertexPosUV[] {// 前面new VertexPosUV(r, r, r, 0f, 1f), // 0new VertexPosUV(-r, r, r, 1f, 1f), // 1new VertexPosUV(-r, -r, r, 1f, 0f), // 2new VertexPosUV(r, -r, r, 0f, 0f), // 3// 后面new VertexPosUV(r, r, -r, 0f, 1f), // 4new VertexPosUV(-r, r, -r, 1f, 1f), // 5new VertexPosUV(-r, -r, -r, 1f, 0f), // 6new VertexPosUV(r, -r, -r, 0f, 0f), // 7// 上面new VertexPosUV(r, r, r, 0f, 1f), // 8new VertexPosUV(r, r, -r, 1f, 1f), // 9new VertexPosUV(-r, r, -r, 1f, 0f), // 10new VertexPosUV(-r, r, r, 0f, 0f), // 11// 下面new VertexPosUV(r, -r, r, 0f, 1f), // 12new VertexPosUV(r, -r, -r, 1f, 1f), // 13new VertexPosUV(-r, -r, -r, 1f, 0f), // 14new VertexPosUV(-r, -r, r, 0f, 0f), // 15// 右面new VertexPosUV(r, r, r, 0f, 1f), // 16new VertexPosUV(r, r, -r, 1f, 1f), // 17new VertexPosUV(r, -r, -r, 1f, 0f), // 18new VertexPosUV(r, -r, r, 0f, 0f), // 19// 左面new VertexPosUV(-r, r, r, 0f, 1f), // 20new VertexPosUV(-r, r, -r, 1f, 1f), // 21new VertexPosUV(-r, -r, -r, 1f, 0f), // 22new VertexPosUV(-r, -r, r, 0f, 0f) // 23};return vertices;}private short[] getIndices() {short[] indices new short[] {0, 1, 2, 0, 2, 3, // 前面4, 6, 5, 4, 7, 6, // 上面8, 9, 10, 8, 10, 11, // 右面12, 14, 13, 12, 15, 14, // 后面16, 18, 17, 16, 19, 18, // 下面20, 21, 22, 20, 22, 23 // 左面};return indices;}private SubMesh[] getSubMesh() {int subMeshCount 6;int vertexCount 6;SubMesh[] subMeshes new SubMesh[subMeshCount];for (int i 0; i subMeshCount; i) {int offset i * vertexCount;int minIndex offset;int maxIndex minIndex vertexCount - 1;subMeshes[i] new SubMesh(offset, minIndex, maxIndex, vertexCount);}return subMeshes;}
} square.mat
material {name : square,shadingModel : unlit, // 禁用所有lighting// 自定义变量参数parameters : [{type : sampler2d,name : mainTex}],// 顶点着色器入参MaterialVertexInputs中需要的顶点属性requires : [uv0]
}fragment {void material(inout MaterialInputs material) {prepareMaterial(material); // 在方法返回前必须回调该函数material.baseColor texture(materialParams_mainTex, getUV0());}
} transform.bat
echo off
setlocal enabledelayedexpansion
set srcFolder../src/main/materials
set distFolder../src/main/assets/materialsfor %%f in (%srcFolder%\*.mat) do (set matfile%%~nfmatc -p mobile -a opengl -o !matfile!.filamat %%fmove !matfile!.filamat %distFolder%\!matfile!.filamat
)echo Processing complete.
pause 说明需要将 matc.exe 文件与 transform.bat 文件放在同一个目录下面matc.exe 源自Filament环境搭建中编译生成的 exe 文件。双击 transform.bat 文件会自动将 /src/main/materials/ 下面的所有 mat 文件全部转换为 filamat 文件并移到 /src/main/assets/materials/ 目录下面。 运行效果如下。
