/** * Allocates and initializes OpenGL resources needed by the background renderer. Must be * called on the OpenGL thread, typically in * {@link GLSurfaceView.Renderer#onSurfaceCreated(GL10, EGLConfig)}. * * @param context Needed to access shader source. */ public void CreateOnGlThread(Context context) { // Generate the background texture. var textures = new int[1]; GLES20.GlGenTextures(1, textures, 0); TextureId = textures[0]; GLES20.GlBindTexture(mTextureTarget, TextureId); GLES20.GlTexParameteri(mTextureTarget, GLES20.GlTextureWrapS, GLES20.GlClampToEdge); GLES20.GlTexParameteri(mTextureTarget, GLES20.GlTextureWrapT, GLES20.GlClampToEdge); GLES20.GlTexParameteri(mTextureTarget, GLES20.GlTextureMinFilter, GLES20.GlNearest); GLES20.GlTexParameteri(mTextureTarget, GLES20.GlTextureMagFilter, GLES20.GlNearest); int numVertices = 4; if (numVertices != QUAD_COORDS.Length / COORDS_PER_VERTEX) { throw new Exception("Unexpected number of vertices in BackgroundRenderer."); } var bbVertices = ByteBuffer.AllocateDirect(QUAD_COORDS.Length * FLOAT_SIZE); bbVertices.Order(ByteOrder.NativeOrder()); mQuadVertices = bbVertices.AsFloatBuffer(); mQuadVertices.Put(QUAD_COORDS); mQuadVertices.Position(0); var bbTexCoords = ByteBuffer.AllocateDirect(numVertices * TEXCOORDS_PER_VERTEX * FLOAT_SIZE); bbTexCoords.Order(ByteOrder.NativeOrder()); mQuadTexCoord = bbTexCoords.AsFloatBuffer(); mQuadTexCoord.Put(QUAD_TEXCOORDS); mQuadTexCoord.Position(0); var bbTexCoordsTransformed = ByteBuffer.AllocateDirect(numVertices * TEXCOORDS_PER_VERTEX * FLOAT_SIZE); bbTexCoordsTransformed.Order(ByteOrder.NativeOrder()); mQuadTexCoordTransformed = bbTexCoordsTransformed.AsFloatBuffer(); int vertexShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlVertexShader, Resource.Raw.screenquad_vertex); int fragmentShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlFragmentShader, Resource.Raw.screenquad_fragment_oes); mQuadProgram = GLES20.GlCreateProgram(); GLES20.GlAttachShader(mQuadProgram, vertexShader); GLES20.GlAttachShader(mQuadProgram, fragmentShader); GLES20.GlLinkProgram(mQuadProgram); GLES20.GlUseProgram(mQuadProgram); ShaderUtil.CheckGLError(TAG, "Program creation"); mQuadPositionParam = GLES20.GlGetAttribLocation(mQuadProgram, "a_Position"); mQuadTexCoordParam = GLES20.GlGetAttribLocation(mQuadProgram, "a_TexCoord"); ShaderUtil.CheckGLError(TAG, "Program parameters"); }
/** * Allocates and initializes OpenGL resources needed by the plane renderer. Must be * called on the OpenGL thread, typically in * {@link GLSurfaceView.Renderer#onSurfaceCreated(GL10, EGLConfig)}. * * @param context Needed to access shader source and texture PNG. * @param gridDistanceTextureName Name of the PNG file containing the grid texture. */ public void CreateOnGlThread(Context context, String gridDistanceTextureName) { int vertexShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlVertexShader, Resource.Raw.plane_vertex); int passthroughShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlFragmentShader, Resource.Raw.plane_fragment); mPlaneProgram = GLES20.GlCreateProgram(); GLES20.GlAttachShader(mPlaneProgram, vertexShader); GLES20.GlAttachShader(mPlaneProgram, passthroughShader); GLES20.GlLinkProgram(mPlaneProgram); GLES20.GlUseProgram(mPlaneProgram); ShaderUtil.CheckGLError(TAG, "Program creation"); // Read the texture. var textureBitmap = Android.Graphics.BitmapFactory.DecodeStream( context.Assets.Open(gridDistanceTextureName)); GLES20.GlActiveTexture(GLES20.GlTexture0); GLES20.GlGenTextures(mTextures.Length, mTextures, 0); GLES20.GlBindTexture(GLES20.GlTexture2d, mTextures[0]); GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMinFilter, GLES20.GlLinearMipmapLinear); GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMagFilter, GLES20.GlLinear); GLUtils.TexImage2D(GLES20.GlTexture2d, 0, textureBitmap, 0); GLES20.GlGenerateMipmap(GLES20.GlTexture2d); GLES20.GlBindTexture(GLES20.GlTexture2d, 0); ShaderUtil.CheckGLError(TAG, "Texture loading"); mPlaneXZPositionAlphaAttribute = GLES20.GlGetAttribLocation(mPlaneProgram, "a_XZPositionAlpha"); mPlaneModelUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_Model"); mPlaneModelViewProjectionUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_ModelViewProjection"); mTextureUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_Texture"); mLineColorUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_lineColor"); mDotColorUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_dotColor"); mGridControlUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_gridControl"); mPlaneUvMatrixUniform = GLES20.GlGetUniformLocation(mPlaneProgram, "u_PlaneUvMatrix"); ShaderUtil.CheckGLError(TAG, "Program parameters"); }
/** * Allocates and initializes OpenGL resources needed by the plane renderer. Must be * called on the OpenGL thread, typically in * {@link GLSurfaceView.Renderer#onSurfaceCreated(GL10, EGLConfig)}. * * @param context Needed to access shader source. */ public void CreateOnGlThread(Context context) { ShaderUtil.CheckGLError(TAG, "before create"); var buffers = new int[1]; GLES20.GlGenBuffers(1, buffers, 0); mVbo = buffers[0]; GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVbo); mVboSize = INITIAL_BUFFER_POINTS * BYTES_PER_POINT; GLES20.GlBufferData(GLES20.GlArrayBuffer, mVboSize, null, GLES20.GlDynamicDraw); GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0); ShaderUtil.CheckGLError(TAG, "buffer alloc"); int vertexShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlVertexShader, Resource.Raw.point_cloud_vertex); int passthroughShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlFragmentShader, Resource.Raw.passthrough_fragment); mProgramName = GLES20.GlCreateProgram(); GLES20.GlAttachShader(mProgramName, vertexShader); GLES20.GlAttachShader(mProgramName, passthroughShader); GLES20.GlLinkProgram(mProgramName); GLES20.GlUseProgram(mProgramName); ShaderUtil.CheckGLError(TAG, "program"); mPositionAttribute = GLES20.GlGetAttribLocation(mProgramName, "a_Position"); mColorUniform = GLES20.GlGetUniformLocation(mProgramName, "u_Color"); mModelViewProjectionUniform = GLES20.GlGetUniformLocation( mProgramName, "u_ModelViewProjection"); mPointSizeUniform = GLES20.GlGetUniformLocation(mProgramName, "u_PointSize"); ShaderUtil.CheckGLError(TAG, "program params"); }
/** * Creates and initializes OpenGL resources needed for rendering the model. * * @param context Context for loading the shader and below-named model and texture assets. * @param objAssetName Name of the OBJ file containing the model geometry. * @param diffuseTextureAssetName Name of the PNG file containing the diffuse texture map. */ public void CreateOnGlThread(Context context, string objAssetName, string diffuseTextureAssetName) { // Read the texture. var textureBitmap = BitmapFactory.DecodeStream(context.Assets.Open(diffuseTextureAssetName)); GLES20.GlActiveTexture(GLES20.GlTexture0); GLES20.GlGenTextures(mTextures.Length, mTextures, 0); GLES20.GlBindTexture(GLES20.GlTexture2d, mTextures[0]); GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMinFilter, GLES20.GlLinearMipmapLinear); GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMagFilter, GLES20.GlLinear); GLUtils.TexImage2D(GLES20.GlTexture2d, 0, textureBitmap, 0); GLES20.GlGenerateMipmap(GLES20.GlTexture2d); GLES20.GlBindTexture(GLES20.GlTexture2d, 0); textureBitmap.Recycle(); ShaderUtil.CheckGLError(TAG, "Texture loading"); // Read the obj file. var objInputStream = context.Assets.Open(objAssetName); var obj = ObjReader.Read(objInputStream); // Prepare the Obj so that its structure is suitable for // rendering with OpenGL: // 1. Triangulate it // 2. Make sure that texture coordinates are not ambiguous // 3. Make sure that normals are not ambiguous // 4. Convert it to single-indexed data obj = ObjUtils.ConvertToRenderable(obj); // OpenGL does not use Java arrays. ByteBuffers are used instead to provide data in a format // that OpenGL understands. // Obtain the data from the OBJ, as direct buffers: IntBuffer wideIndices = ObjData.GetFaceVertexIndices(obj, 3); FloatBuffer vertices = ObjData.GetVertices(obj); FloatBuffer texCoords = ObjData.GetTexCoords(obj, 2); FloatBuffer normals = ObjData.GetNormals(obj); // Convert int indices to shorts for GL ES 2.0 compatibility ShortBuffer indices = ByteBuffer.AllocateDirect(2 * wideIndices.Limit()) .Order(ByteOrder.NativeOrder()).AsShortBuffer(); while (wideIndices.HasRemaining) { indices.Put((short)wideIndices.Get()); } indices.Rewind(); var buffers = new int[2]; GLES20.GlGenBuffers(2, buffers, 0); mVertexBufferId = buffers[0]; mIndexBufferId = buffers[1]; // Load vertex buffer mVerticesBaseAddress = 0; mTexCoordsBaseAddress = mVerticesBaseAddress + 4 * vertices.Limit(); mNormalsBaseAddress = mTexCoordsBaseAddress + 4 * texCoords.Limit(); int totalBytes = mNormalsBaseAddress + 4 * normals.Limit(); GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVertexBufferId); GLES20.GlBufferData(GLES20.GlArrayBuffer, totalBytes, null, GLES20.GlStaticDraw); GLES20.GlBufferSubData( GLES20.GlArrayBuffer, mVerticesBaseAddress, 4 * vertices.Limit(), vertices); GLES20.GlBufferSubData( GLES20.GlArrayBuffer, mTexCoordsBaseAddress, 4 * texCoords.Limit(), texCoords); GLES20.GlBufferSubData( GLES20.GlArrayBuffer, mNormalsBaseAddress, 4 * normals.Limit(), normals); GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0); // Load index buffer GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, mIndexBufferId); mIndexCount = indices.Limit(); GLES20.GlBufferData( GLES20.GlElementArrayBuffer, 2 * mIndexCount, indices, GLES20.GlStaticDraw); GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, 0); ShaderUtil.CheckGLError(TAG, "OBJ buffer load"); int vertexShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlVertexShader, Resource.Raw.object_vertex); int fragmentShader = ShaderUtil.LoadGLShader(TAG, context, GLES20.GlFragmentShader, Resource.Raw.object_fragment); mProgram = GLES20.GlCreateProgram(); GLES20.GlAttachShader(mProgram, vertexShader); GLES20.GlAttachShader(mProgram, fragmentShader); GLES20.GlLinkProgram(mProgram); GLES20.GlUseProgram(mProgram); ShaderUtil.CheckGLError(TAG, "Program creation"); mModelViewUniform = GLES20.GlGetUniformLocation(mProgram, "u_ModelView"); mModelViewProjectionUniform = GLES20.GlGetUniformLocation(mProgram, "u_ModelViewProjection"); mPositionAttribute = GLES20.GlGetAttribLocation(mProgram, "a_Position"); mNormalAttribute = GLES20.GlGetAttribLocation(mProgram, "a_Normal"); mTexCoordAttribute = GLES20.GlGetAttribLocation(mProgram, "a_TexCoord"); mTextureUniform = GLES20.GlGetUniformLocation(mProgram, "u_Texture"); mLightingParametersUniform = GLES20.GlGetUniformLocation(mProgram, "u_LightingParameters"); mMaterialParametersUniform = GLES20.GlGetUniformLocation(mProgram, "u_MaterialParameters"); ShaderUtil.CheckGLError(TAG, "Program parameters"); Android.Opengl.Matrix.SetIdentityM(mModelMatrix, 0); }