C# Effect.Begin方法代码示例

        public void drawMe(GraphicsDevice device, Effect effect)
        {
            if (mDecl == null)
            {
                mDecl = new VertexDeclaration(device, VertexPositionColor.VertexElements);
            }

            // update vert buffer.
            for (int i = 0; i < mPointMasses.Count; i++)
            {
                mVerts[i].Position = JelloPhysics.VectorTools.vec3FromVec2(mPointMasses[i].Position);

                float dist = (mPointMasses[i].Position - mGlobalShape[i]).Length() * 2.0f;
                if (dist > 1f) { dist = 1f; }

                mVerts[i].Color = mColor;
            }

            device.VertexDeclaration = mDecl;

            // draw me!
            effect.Begin();
            foreach (EffectPass pass in effect.CurrentTechnique.Passes)
            {
                pass.Begin();
                device.DrawUserIndexedPrimitives<VertexPositionColor>(PrimitiveType.TriangleList, mVerts, 0, mVerts.Length, mIndices, 0, mIndices.Length / 3);
                pass.End();
            }
            effect.End();
        }

 /// <summary>
 /// Draws the quad using the specified effect. Sets no parameters on the effect, nor any render states on
 /// the graphics device. Those must be set appropriately before calling Draw.
 /// This is a convenience function, calling Begin, End, and DrawGeometry for you.
 /// </summary>
 /// <param name="effect">The effect to draw with.</param>
 public void Draw(Effect effect)
 {
     effect.Begin();
     foreach (EffectPass pass in effect.CurrentTechnique.Passes)
     {
         pass.Begin();
         DrawGeometry();
         pass.End();
     }
     effect.End();
 }

        public void RenderScreenQuad(Effect effect, EffectTechnique technique, Texture2D texture)
        {
            effect.CurrentTechnique = technique;

            sb.Begin(SpriteBlendMode.None, SpriteSortMode.Immediate, SaveStateMode.None);
            effect.Begin();
            technique.Passes[0].Begin();
            sb.Draw(texture, screen, Color.White);
            technique.Passes[0].End();
            effect.End();
            sb.End();
        }

        public void Draw(Effect effect)
        {
            var device = GraphicsDeviceHolder.Device;
             device.VertexDeclaration = vertexDeclaration;
             device.Vertices[0].SetSource(vertexBuffer, 0, 3 * sizeof(float));

             effect.Parameters["xWorld"].SetValue(Matrix.Identity);
             effect.Begin();
             foreach (var pass in effect.CurrentTechnique.Passes)
             {
            pass.Begin();
            device.DrawPrimitives(PrimitiveType.LineList, 0, 2);
            pass.End();
             }
             effect.End();
        }

        public void Draw(GameTime gameTime, GraphicsDevice device, Effect effect, Matrix worldViewProjectionMatrix, int resolutionWidth, int resolutionHeight)
        {
            effect.Parameters["xWorldViewProjection"].SetValue(worldViewProjectionMatrix);
            effect.Parameters["xWidth"].SetValue(resolutionWidth);
            effect.Parameters["xHeight"].SetValue(resolutionHeight);

            effect.Begin();
            foreach (SModelMesh mesh in _meshes)
            {
                effect.Parameters["xTexture"].SetValue(mesh.texture);
                foreach (EffectPass pass in effect.CurrentTechnique.Passes)
                {
                    pass.Begin();
                    device.VertexDeclaration = _vertexDeclaration;
                    device.Vertices[0].SetSource(mesh.vertexBuffer, 0, _vertexSizeInBytes);
                    device.DrawPrimitives(PrimitiveType.TriangleList, 0, mesh.numPrimitives);
                    pass.End();
                }
            }
            effect.End();
        }

        void DrawFlags(Effect effectToUse, String technique)
        {
            GraphicsDevice device = parentGame.device;

            //effectToUse = new BasicEffect(device, new EffectPool());

            foreach (EventFlag flag in parentGame.myLevel.FlagsList)
            {
                currentColor.G -= 1;

                VertexPositionColor[] pointList = new VertexPositionColor[5];
                int x = 0;

                #region Get Corners

                foreach (Vector2 Crnr in flag.Corners)
                {
                    Vector3 corner = new Vector3(Crnr.X, 0, Crnr.Y);
                    Vector3 norm;

                    parentGame.terrainEngine.GetHeight(corner, out corner.Y, out norm);
                    corner.Y += 2;

                    pointList[x] = new VertexPositionColor(corner, Color.Red);
                    if (x == 0)
                    {
                        pointList[4] = new VertexPositionColor(corner, Color.Red);
                        currentColor = Color.Red;
                    }
                    else
                        currentColor = Color.Chartreuse;

                    float scale = 0.05f;
                    if (activeFlag == flag
                        && activeCorner == Crnr)
                        scale *= 1.5f;

                    parentGame.currentColor = Color.Brown;

                    parentGame.DrawModel(effectToUse, parentGame.cornerModel, parentGame.tankTextures,

                    Matrix.CreateScale(scale)
                    *
                    Matrix.Identity
                    *
                    Matrix.CreateTranslation(corner),

                    technique, true);

                    x++;
                }

                #endregion

                short[] lineStripIndices = new short[5] { 0, 1, 2, 3, 4 };

                device.RenderState.FillMode = FillMode.WireFrame;
                device.RenderState.CullMode = CullMode.None;

                effectToUse.Begin();
                foreach (EffectPass pass in effectToUse.CurrentTechnique.Passes)
                {
                    pass.Begin();

                    device.VertexDeclaration = new
                        VertexDeclaration(device,
                        VertexPositionColor.VertexElements);

                    device.DrawUserIndexedPrimitives<VertexPositionColor>(
                        PrimitiveType.LineStrip,
                        pointList,
                        0,   // vertex buffer offset to add to each element of the index buffer
                        5,   // number of vertices to draw
                        lineStripIndices,
                        0,   // first index element to read
                        4    // number of primitives to draw
                    );

                    pass.End();

                }
                effectToUse.End();
                //device.RenderState.FillMode = FillMode.Solid;
                device.RenderState.FillMode = FillMode.Solid;
                device.RenderState.CullMode = CullMode.CullClockwiseFace;
            }
        }

        void DrawSpawns(Effect effectToUse, String technique)
        {
            GraphicsDevice device = parentGame.device;

            foreach (EventFlag flag in parentGame.myLevel.FlagsList)
            {
                if (flag == activeFlag)
                {
                    foreach (GameEvent g_event in flag.Events)
                    {

                        VertexPositionColor[] pointList = new VertexPositionColor[2];

                        #region Get Corners

                        Vector3 corner = g_event.SpawnPoint.Position;
                        Vector2 center = FindCenter2D(flag.Corners);

                        Vector3 Center = new Vector3(center.X, 0, center.Y);
                        Vector3 norm;

                        if(parentGame.terrainEngine.IsOnHeightmap(Center))
                            parentGame.terrainEngine.GetHeight(Center, out Center.Y, out norm);

                        pointList[0] = new VertexPositionColor(corner, Color.Red);
                        pointList[1] = new VertexPositionColor(Center, Color.Red);

                        float scale = 0.05f;

                        if (activeEvent == g_event)
                            scale *= 1.5f;

                        parentGame.currentColor = Color.GreenYellow;

                            parentGame.DrawModel(effectToUse, parentGame.cornerModel, parentGame.tankTextures,

                            Matrix.CreateScale(scale)
                            *
                            Matrix.Identity
                            *
                            Matrix.CreateTranslation(corner),

                            technique, true);

                            parentGame.currentColor = Color.Brown;

                        #endregion

                        #region draw lines
                        short[] lineStripIndices = new short[2] { 0, 1 };

                        device.RenderState.FillMode = FillMode.WireFrame;
                        device.RenderState.CullMode = CullMode.None;

                        effectToUse.Begin();
                        foreach (EffectPass pass in effectToUse.CurrentTechnique.Passes)
                        {
                            pass.Begin();

                            device.VertexDeclaration = new
                                VertexDeclaration(device,
                                VertexPositionColor.VertexElements);

                            device.DrawUserIndexedPrimitives<VertexPositionColor>(
                                PrimitiveType.LineStrip,
                                pointList,
                                0,   // vertex buffer offset to add to each element of the index buffer
                                2,   // number of vertices to draw
                                lineStripIndices,
                                0,   // first index element to read
                                1    // number of primitives to draw
                            );

                            pass.End();

                        }
                        effectToUse.End();
                        //device.RenderState.FillMode = FillMode.Solid;
                        device.RenderState.FillMode = FillMode.Solid;
                        device.RenderState.CullMode = CullMode.CullClockwiseFace;

                        #endregion

                    }

                }
            }
        }

        private void DrawQuad(Texture2D source, RenderTarget2D target, int x, int y, int width, int height, SpriteBlendMode spriteBlendMode, Effect effect, Color color)
        {
            graphics.GraphicsDevice.SetRenderTarget(0, target);

            if (effect != null)
                graphics.GraphicsDevice.Textures[0] = source;

            // Draw a fullscreen sprite to apply the postprocessing effect.
            spriteBatch.Begin(spriteBlendMode,
                              SpriteSortMode.Immediate,
                              SaveStateMode.SaveState);

            if (effect != null)
            {
                effect.Begin();
                effect.CurrentTechnique.Passes[0].Begin();
            }

            spriteBatch.Draw(source, new Rectangle(x, y, width, height), color);

            spriteBatch.End();

            if (effect != null)
            {
                effect.CurrentTechnique.Passes[0].End();
                effect.End();
            }

            graphics.GraphicsDevice.SetRenderTarget(0, null);
        }

 //method shadow effect render part
 private void renderPart(GraphicsDevice device, List<SRenderInfoMesh> v_list, Matrix world, Effect shadow_effect)
 {
     shadow_effect.Begin();
     shadow_effect.Parameters["xWorld"].SetValue(world);
     for (int i = 0; i < v_list.Count; ++i)
     {
         VertexPositionNormalTexture[] vertices = v_list[i].vertex_info;
         //model_effect.Texture = getTexture(v_list[i].texture_name);
         foreach (EffectPass pass in shadow_effect.CurrentTechnique.Passes)
         {
             pass.Begin();
             int count_primitives = vertices.Length / 3;
             device.DrawUserPrimitives<VertexPositionNormalTexture>(PrimitiveType.TriangleList, vertices, 0, count_primitives);
             pass.End();
         }
     }
     shadow_effect.End();
 }

        private void DrawTerrain(Effect effect)
        {
            effect.Begin();

            foreach (EffectPass pass in effect.CurrentTechnique.Passes)
            {
                pass.Begin();

                for (int i = 0; i < Patches.Count; ++i)
                {
                    // Test the patch against frustum.
                    BoundingBox transformedBBox = Transform(Patches[i].BoundingBox, World);
                    if (Camera.Frustum.Contains(Patches[i].BoundingBox) != ContainmentType.Disjoint)
                    {
                        Patches[i].Draw();
                        ++DrawnPatchCount;
                    }
                }
                pass.End();
            }
            effect.End();
        }

 public void DrawFullScreenQuad(SpriteBatch spriteBatch, Texture2D texture, Effect effect)
 {
     spriteBatch.Begin(SpriteBlendMode.None,
             SpriteSortMode.Immediate, SaveStateMode.SaveState);
     if (effect != null)
     {
         effect.Begin();
         effect.CurrentTechnique.Passes[0].Begin();
     }
     // only render the viewport part
     spriteBatch.Draw(texture, new Rectangle(0, 0,
         DrawingManager.ViewPortSize.X, DrawingManager.ViewPortSize.Y),
         new Rectangle(0, 0, DrawingManager.ViewPortSize.X, DrawingManager.ViewPortSize.Y),
          Color.White);
     if (effect != null)
     {
         effect.CurrentTechnique.Passes[0].End();
         effect.End();
     }
     spriteBatch.End();
 }

        public void Draw(Effect effect,
                         string colorMapParamName,
                         string normalMapParamName,
                         string heightMapParamName,
                         Texture2D wallColorMap,
                         Texture2D wallNormalMap,
                         Texture2D wallHeightMap,
                         Texture2D floorColorMap,
                         Texture2D floorNormalMap,
                         Texture2D floorHeightMap,
                         Texture2D ceilingColorMap,
                         Texture2D ceilingNormalMap,
                         Texture2D ceilingHeightMap,
                         bool drawingCeiling)
        {
            graphicsDevice.VertexDeclaration = vertexDeclaration;
            graphicsDevice.Vertices[0].SetSource(vertexBuffer, 0, NormalMappedVertex.SizeInBytes);

            // Draw the scene geometry.

            effect.Begin();

            // Draw the walls.

            effect.Parameters[colorMapParamName].SetValue(wallColorMap);
            effect.Parameters[normalMapParamName].SetValue(wallNormalMap);
            effect.Parameters[heightMapParamName].SetValue(wallHeightMap);
            effect.CommitChanges();

            foreach (EffectPass pass in effect.CurrentTechnique.Passes)
            {
                pass.Begin();
                graphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, wallsIndex, 8);
                pass.End();
            }

            if (drawingCeiling)
            {
                // Draw the ceiling.

                effect.Parameters[colorMapParamName].SetValue(ceilingColorMap);
                effect.Parameters[normalMapParamName].SetValue(ceilingNormalMap);
                effect.Parameters[heightMapParamName].SetValue(ceilingHeightMap);
                effect.CommitChanges();

                foreach (EffectPass pass in effect.CurrentTechnique.Passes)
                {
                    pass.Begin();
                    graphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, ceilingIndex, 2);
                    pass.End();
                }
            }

            // Draw the floor.

            effect.Parameters[colorMapParamName].SetValue(floorColorMap);
            effect.Parameters[normalMapParamName].SetValue(floorNormalMap);
            effect.Parameters[heightMapParamName].SetValue(floorHeightMap);
            effect.CommitChanges();

            foreach (EffectPass pass in effect.CurrentTechnique.Passes)
            {
                pass.Begin();
                graphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, floorIndex, 2);
                pass.End();
            }

            effect.End();
        }

        /// <summary>
        /// Отрисовывает объект
        /// </summary>
        /// <param name="effect">Эффект, который должен испльзоваться для отрисовки. Предполагается, что как минимум матрицы xProjection и xView уже заданы!</param>
        public void Draw(Effect effect, Matrix worldMatrix, bool useMaterial)
        {
            GraphicsDevice device = vertexDeclaration.GraphicsDevice;
             device.RenderState.CullMode = CullMode.None;

             effect.Parameters["xWorld"].SetValue(worldMatrix);

             device.VertexDeclaration = vertexDeclaration;
             device.Vertices[0].SetSource(vertexBuffer, 0, vertexSize);
             device.Indices = indexBuffer;

             foreach (ModelMeshPart3D part in meshParts)
             {
            if (useMaterial)
            {
               Material mat = materials[part.MaterialId];
               if (mat.Texture != null)
               {
                  effect.CurrentTechnique = effect.Techniques["Textured"];
                  effect.Parameters["xTexture"].SetValue(mat.Texture);
               }
               else
               {
                  effect.CurrentTechnique = effect.Techniques["SolidColored"];
                  effect.Parameters["xSolidColor"].SetValue(mat.Color.ToVector4());
               }
            }

            effect.Begin();
            foreach (var pass in effect.CurrentTechnique.Passes)
            {
               pass.Begin();

               device.DrawIndexedPrimitives(triangleStrip ? PrimitiveType.TriangleStrip : PrimitiveType.TriangleList, 0, 0,
                  verticesCount, part.StartIdx, part.PrimitivesCount);

               pass.End();
            }
            effect.End();
             }
        }

        /// <summary>
        /// Draws the tree mesh using a given effect.
        /// You should set the proper parameters on the effect first, such as World, View, and Projection matrices.
        /// </summary>
        /// <param name="effect">Effect to draw with.</param>
        public void Draw(Effect effect)
        {
            device.VertexDeclaration = vdeclaration;
            device.Vertices[0].SetSource(vbuffer, 0, TreeVertex.SizeInBytes);
            device.Indices = ibuffer;

            effect.Begin();
            foreach (EffectPass pass in effect.CurrentTechnique.Passes)
            {
                pass.Begin();
                device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, numvertices, 0, numtriangles);
                pass.End();
            }
            effect.End();
        }

//.........这里部分代码省略.........
uniform float4 _vs_c[11] : register(vs, c0);
{4}
technique Shader
{0}
	pass
	{0}
		VertexShader = 
			asm 
			{0}
				{2}
			{1};
		PixelShader  = 
			asm 
			{0}
				{3}
			{1};
	{1}
{1}",
				"{", "}", vsAsm, psAsm, constantSetup);

			}
			else
			{
				string vsSource = vsConvert.GetSource();
				string psSource = psConvert.GetSource();

				//setup the technique.
				techniqueCode = string.Format(
	@"
{2}

{3}

technique Shader
{0}
	pass
	{0}
		VertexShader = compile {4} vsMain();
		PixelShader  = compile {5} psMain();
	{1}
{1}",
				"{", "}", vsSource, psSource, vsConvert.GetProfile().ToString().ToLower(), psConvert.GetProfile().ToString().ToLower());

			}
			
			TargetPlatform target = TargetPlatform.Unknown;
			switch (platform)
			{
				case Platform.Both:
					throw new ArgumentException();
				case Platform.Windows:
					target = TargetPlatform.Windows;
					break;
				case Platform.Xbox:
					target = TargetPlatform.Xbox360;
					break;
			}

			CompiledEffect effectSource = Effect.CompileEffectFromSource(techniqueCode, null, null, CompilerOptions.None, target);

			if (effectSource.Success == false)
				Common.ThrowError(effectSource.ErrorsAndWarnings, techniqueCode);

			byte[] code = effectSource.GetEffectCode();

			Effect effect = new Effect(Graphics.GraphicsDevice, code, CompilerOptions.None, new EffectPool());

			Vector4[] valuesV = new Vector4[11];
			for (int i = 0; i < valuesV.Length; i++)
			{
				valuesV[i] = new Vector4(i,0,0,0);
			}
			//Vector4[] valuesP = new Vector4[24];
			//for (int i = 0; i < valuesP.Length; i++)
			//{
			//    valuesP[i] = new Vector4(0, i, 0, 0);
			//}
			effect.Parameters[0].SetValue(valuesV);
			Vector4[] test = effect.Parameters[0].GetValueVector4Array(11);
			//effect.Parameters[1].SetValue(valuesP);
			//effect.Parameters[2].SetValue(new bool[] { false, false });

			GraphicsDevice gd = Graphics.GraphicsDevice;

			effect.CurrentTechnique = effect.Techniques[0];
			effect.Begin();
			effect.Techniques[0].Passes[0].Begin();


			Vector4[] outputV = gd.GetVertexShaderVector4ArrayConstant(0, 255);
			Vector4[] outputP = gd.GetPixelShaderVector4ArrayConstant(0, 24);
			//bool[] outputPB = gd.GetPixelShaderBooleanConstant(0, 2);

			effect.Techniques[0].Passes[0].End();
			effect.End();

			string asm = effect.Disassemble(false);

			return code;
        }