C# VRageMath.Color类代码示例

        internal void Draw(Rectangle rect, Color color, MyVideoRectangleFitMode fitMode)
        {
            int w = 0, h = 0;
            byte [] data = m_wrapper.GetTextureData(ref w, ref h);
            process_frame(data, w, h);

            Rectangle dst = rect;
            Rectangle src = new Rectangle(0, 0, w, h);
            var videoSize = new Vector2(w, h);
            float videoAspect = videoSize.X / videoSize.Y;
            float rectAspect = (float)rect.Width / (float)rect.Height;

            // Automatic decision based on ratios.
            if (fitMode == MyVideoRectangleFitMode.AutoFit)
                fitMode = (videoAspect > rectAspect) ? MyVideoRectangleFitMode.FitHeight : MyVideoRectangleFitMode.FitWidth;

            float scaleRatio = 0.0f;
            switch (fitMode)
            {
                case MyVideoRectangleFitMode.None:
                    break;

                case MyVideoRectangleFitMode.FitWidth:
                    scaleRatio = (float)dst.Width / videoSize.X;
                    dst.Height = (int)(scaleRatio * videoSize.Y);
                    if (dst.Height > rect.Height)
                    {
                        var diff = dst.Height - rect.Height;
                        dst.Height = rect.Height;
                        diff = (int)(diff / scaleRatio);
                        src.Y += (int)(diff * 0.5f);
                        src.Height -= diff;
                    }
                    break;

                case MyVideoRectangleFitMode.FitHeight:
                    scaleRatio = (float)dst.Height / videoSize.Y;
                    dst.Width = (int)(scaleRatio * videoSize.X);
                    if (dst.Width > rect.Width)
                    {
                        var diff = dst.Width - rect.Width;
                        dst.Width = rect.Width;
                        diff = (int)(diff / scaleRatio);
                        src.X += (int)(diff * 0.5f);
                        src.Width -= diff;
                    }
                    break;
            }
            dst.X = rect.Left + (rect.Width - dst.Width) / 2;
            dst.Y = rect.Top + (rect.Height - dst.Height) / 2;


            VRageMath.RectangleF destination = new VRageMath.RectangleF(dst.X, dst.Y, dst.Width, -dst.Height);
            VRageMath.Rectangle? source = src;
            Vector2 origin = new Vector2(src.Width / 2 * 0, src.Height);

            MySpritesRenderer.AddSingleSprite(m_texture, videoSize, color, origin, Vector2.UnitX, source, destination);
        }

        internal static void DrawTriangle(Vector3 v0, Vector3 v1, Vector3 v2, Color color)
        {
            var distance = ((v0 + v1 + v2) / 3f - MyEnvironment.CameraPosition).LengthSquared();
            m_triangleSortDistance.Add(distance);

            m_vertexList.Add(new MyVertexFormatPositionColor(v0, color));
            m_vertexList.Add(new MyVertexFormatPositionColor(v1, color));
            m_vertexList.Add(new MyVertexFormatPositionColor(v2, color));
        }

        internal void AddQuad(Vector3 v0, Vector3 v1, Vector3 v2, Vector3 v3, Color color)
        {
            var bcolor = new Byte4(color.R, color.G, color.B, color.A);

            Add(new MyVertexFormatPositionColor(v0, bcolor));
            Add(new MyVertexFormatPositionColor(v1, bcolor));

            Add(new MyVertexFormatPositionColor(v1, bcolor));
            Add(new MyVertexFormatPositionColor(v2, bcolor));

            Add(new MyVertexFormatPositionColor(v2, bcolor));
            Add(new MyVertexFormatPositionColor(v3, bcolor));

            Add(new MyVertexFormatPositionColor(v3, bcolor));
            Add(new MyVertexFormatPositionColor(v0, bcolor));
        }

        internal static void AddPointBillboard(string material,
           Color color, Vector3D origin, float radius, float angle, int priority = 0, int customViewProjection = -1)
        {
            Debug.Assert(material != null);

            origin.AssertIsValid();
            angle.AssertIsValid();

            MyQuadD quad;
            if (MyUtils.GetBillboardQuadAdvancedRotated(out quad, origin, radius, angle, MyEnvironment.CameraPosition) != false)
            {
                MyBillboard billboard = SpawnBillboard();
                if (billboard == null)
                    return;

                billboard.Priority = priority;
                billboard.CustomViewProjection = customViewProjection;
                CreateBillboard(billboard, ref quad, material, ref color, ref origin);
            }
        }

        internal void AddCone(Vector3 translation, Vector3 directionVec, Vector3 baseVec, int tessalation, Color color)
        {
            var axis = directionVec;
            axis.Normalize();

            var apex = translation + directionVec;

            var steps = tessalation;
            var stepsRcp = (float)(Math.PI * 2 / steps);
            for (int i = 0; i < 32; i++)
            {
                float a0 = i * stepsRcp;
                float a1 = (i + 1) * stepsRcp;

                var A = translation + Vector3.Transform(baseVec, Matrix.CreateFromAxisAngle(axis, a0));
                var B = translation + Vector3.Transform(baseVec, Matrix.CreateFromAxisAngle(axis, a1));

                Add(A, B, color);
                Add(A, apex, color);
            }
        }

        internal static void AddBillboardOriented(string material,
            Color color, Vector3D origin, Vector3 leftVector, Vector3 upVector, float radius, int priority = 0, int customViewProjection = -1)
        {
            Debug.Assert(material != null);

            origin.AssertIsValid();
            leftVector.AssertIsValid();
            upVector.AssertIsValid();
            radius.AssertIsValid();
            MyDebug.AssertDebug(radius > 0);

            MyBillboard billboard = SpawnBillboard();
            if (billboard == null)
                return;

            billboard.Priority = priority;
            billboard.CustomViewProjection = customViewProjection;

            MyQuadD quad;
            MyUtils.GetBillboardQuadOriented(out quad, ref origin, radius, ref leftVector, ref upVector);

            CreateBillboard(billboard, ref quad, material, ref color, ref origin);
        }

        //  This method is like a constructor (which we can't use because billboards are allocated from a pool).
        //  It starts/initializes a billboard. Refs used only for optimalization
        public static void CreateBillboard(VRageRender.MyBillboard billboard, ref MyQuadD quad, string material, string blendMaterial, float textureBlendRatio,
            ref Color color, ref Vector3D origin, Vector2 uvOffset, bool colorize = false, bool near = false, bool lowres = false, float reflectivity = 0)
        {
            Debug.Assert(material != null);
            
            if (string.IsNullOrEmpty(material) || !MyTransparentMaterials.ContainsMaterial(material))
            {
                material = "ErrorMaterial";
                color = Vector4.One;
            }

            billboard.Material = material;
            billboard.BlendMaterial = blendMaterial;
            billboard.BlendTextureRatio = textureBlendRatio;

            quad.Point0.AssertIsValid();
            quad.Point1.AssertIsValid();
            quad.Point2.AssertIsValid();
            quad.Point3.AssertIsValid();


            //  Billboard vertexes
            billboard.Position0 = quad.Point0;
            billboard.Position1 = quad.Point1;
            billboard.Position2 = quad.Point2;
            billboard.Position3 = quad.Point3;

            billboard.UVOffset = uvOffset;

            EnableColorize = colorize;

            if (EnableColorize)
                billboard.Size = (float)(billboard.Position0 - billboard.Position2).Length();

            //  Distance for sorting
            //  IMPORTANT: Must be calculated before we do color and alpha misting, because we need distance there
            billboard.DistanceSquared = (float)Vector3D.DistanceSquared(MyRenderCamera.Position, origin);

            //  Color
            billboard.Color = color;
            billboard.ColorIntensity = 1;
            billboard.Reflectivity = reflectivity;

            billboard.Near = near;
            billboard.Lowres = lowres;
            billboard.ParentID = -1;

            //  Alpha depends on distance to camera. Very close bilboards are more transparent, so player won't see billboard errors or rotating billboards
            var mat = MyTransparentMaterials.GetMaterial(billboard.Material);
            if (mat.AlphaMistingEnable)
                billboard.Color *= MathHelper.Clamp(((float)Math.Sqrt(billboard.DistanceSquared) - mat.AlphaMistingStart) / (mat.AlphaMistingEnd - mat.AlphaMistingStart), 0, 1);

            billboard.Color *= mat.Color;

            billboard.ContainedBillboards.Clear();
        }

        //  Add billboard for one frame only. This billboard isn't particle (it doesn't survive this frame, doesn't have update/draw methods, etc).
        //  This billboard isn't facing the camera. It's always oriented in specified direction. May be used as thrusts, or inner light of reflector.
        //  It's used by other classes when they want to draw some billboard (e.g. rocket thrusts, reflector glare).
        public static void AddBillboardOriented(string material,
            Color color, Vector3D origin, Vector3 leftVector, Vector3 upVector, float radius, int priority = 0, bool colorize = false, int customViewProjection = -1)
        {
            Debug.Assert(material != null);

            if (!IsEnabled) return;

            origin.AssertIsValid();
            leftVector.AssertIsValid();
            upVector.AssertIsValid();
            radius.AssertIsValid();
            MyDebug.AssertDebug(radius > 0);


            MyBillboard billboard = m_billboardOncePool.Allocate();
            if (billboard == null)
                return;

            billboard.Priority = priority;
            billboard.CustomViewProjection = customViewProjection;

            MyQuadD quad;
            MyUtils.GetBillboardQuadOriented(out quad, ref origin, radius, ref leftVector, ref upVector);

            CreateBillboard(billboard, ref quad, material, ref color, ref origin, colorize);

            m_billboardsOnce.Add(billboard);
        }

 internal MyVertexFormatPositionColor(Vector3 position, Color color)
 {
     Position = position;
     Color = new Byte4(color.PackedValue);
 }

 internal static void DrawQuadRowWise(Vector3 v0, Vector3 v1, Vector3 v2, Vector3 v3, Color color)
 {
     DrawTriangle(v0, v1, v2, color);
     DrawTriangle(v1, v3, v2, color);
 }

        // Assuming engine order (+Z first)
        internal static unsafe void Draw6FacedConvexZ(Vector3* vertices, Color color, float alpha)
        {
            Color c = color;
            c.A = (byte)(alpha * 255);

            DrawQuadClockWise(vertices[0], vertices[1], vertices[2], vertices[3], c);
            DrawQuadClockWise(vertices[4], vertices[5], vertices[6], vertices[7], c);

            /* top left bottom right */
            DrawQuadClockWise(vertices[0], vertices[1], vertices[5], vertices[4], c);
            DrawQuadClockWise(vertices[0], vertices[3], vertices[7], vertices[4], c);
            DrawQuadClockWise(vertices[3], vertices[2], vertices[6], vertices[7], c);
            DrawQuadClockWise(vertices[2], vertices[1], vertices[5], vertices[6], c);
        }

        public static uint CreateRenderEntity(
            string debugName,
            string model,
            MatrixD worldMatrix,
            MyMeshDrawTechnique technique,
            RenderFlags flags,
            CullingOptions cullingOptions,
            Color diffuseColor,
            Vector3 colorMaskHsv,
            float dithering = 0,
            float maxViewDistance = float.MaxValue,
            byte depthBias = 0
            )
        {
            var message = MessagePool.Get<MyRenderMessageCreateRenderEntity>(MyRenderMessageEnum.CreateRenderEntity);

            uint id = GetMessageId();
            message.ID = id;
            message.DebugName = debugName;
            message.Model = model;
            message.WorldMatrix = worldMatrix;
            message.Technique = technique;
            message.Flags = flags;
            message.CullingOptions = cullingOptions;
            message.MaxViewDistance = maxViewDistance;
            message.DepthBias = depthBias;

            EnqueueMessage(message);

            UpdateRenderEntity(id, diffuseColor, colorMaskHsv, dithering);

            return id;
        }

        public static void DrawString(
            int fontIndex,
            Vector2 screenCoord,
            Color colorMask,
            StringBuilder text,
            float screenScale,
            float screenMaxWidth)
        {
            var message = MessagePool.Get<MyRenderMessageDrawString>(MyRenderMessageEnum.DrawString);
            message.Text.Clear().AppendStringBuilder(text);
            message.FontIndex = fontIndex;
            message.ScreenCoord = screenCoord;
            message.ColorMask = colorMask;
            message.ScreenScale = screenScale;
            message.ScreenMaxWidth = screenMaxWidth;

            EnqueueMessage(message);
        }

        public static void DrawSpriteAtlas(string texture, Vector2 position, Vector2 textureOffset, Vector2 textureSize, Vector2 rightVector, Vector2 scale, Color color, Vector2 halfSize)
        {
            Debug.Assert(!string.IsNullOrEmpty(texture) && (texture.EndsWith(".dds") || texture.EndsWith(".png")));

            var message = MessagePool.Get<MyRenderMessageDrawSpriteAtlas>(MyRenderMessageEnum.DrawSpriteAtlas);

            message.Texture = texture;
            message.Position = position;
            message.TextureOffset = textureOffset;
            message.TextureSize = textureSize;
            message.RightVector = rightVector;
            message.Scale = scale;
            message.Color = color;
            message.HalfSize = halfSize;

            EnqueueMessage(message);
        }

        // Assuming natural order (+Y) first
        internal static unsafe void Draw6FacedConvex(Vector3D* vertices, Color color, float alpha)
        {
            Color cc = color;
            cc.A = (byte)(alpha * 255);

            Vector3D c = MyRender11.Environment.CameraPosition;
            Vector3D v0 = vertices[0] - c, v1 = vertices[1] - c, v2 = vertices[2] - c, v3 = vertices[3] - c, v4 = vertices[4] - c, v5 = vertices[5] - c, v6 = vertices[6] - c, v7 = vertices[7] - c;

            DrawQuadRowWise(v0, v1, v2, v3, cc);
            DrawQuadRowWise(v4, v5, v6, v7, cc);

            DrawQuadRowWise(v0, v1, v4, v5, cc);
            DrawQuadRowWise(v0, v2, v4, v6, cc);
            DrawQuadRowWise(v2, v3, v6, v7, cc);
            DrawQuadRowWise(v3, v1, v7, v5, cc);
        }