/// <summary> /// /// </summary> /// <param name="arg"></param> /// <param name="x">mouse position(Left Down is (0, 0)).</param> /// <param name="y">mouse position(Left Down is (0, 0)).</param> /// <param name="lastVertexId"></param> /// <param name="modernRenderer"></param> /// <returns></returns> internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 6, DrawMode.Lines, BufferUsage.StaticDraw); unsafe { var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly); array[0] = lastVertexId - 2; array[1] = lastVertexId - 0; array[2] = lastVertexId - 4; array[3] = lastVertexId - 2; array[4] = lastVertexId - 0; array[5] = lastVertexId - 4; buffer.UnmapBuffer(); } modernRenderer.Render4InnerPicking(arg, buffer); uint id = ColorCodedPicking.ReadStageVertexId(x, y); buffer.Dispose(); if (id + 4 == lastVertexId) { return(new uint[] { id + 4, id, }); } else { return(new uint[] { id - 2, id, }); } }
internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { OneIndexBufferPtr indexBufferPtr = null; using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Lines, BufferUsage.StaticDraw)) { buffer.Create(8); unsafe { var array = (uint *)buffer.Header.ToPointer(); array[0] = lastVertexId - 1; array[1] = lastVertexId - 0; array[2] = lastVertexId - 2; array[3] = lastVertexId - 1; array[4] = lastVertexId - 3; array[5] = lastVertexId - 2; array[6] = lastVertexId - 0; array[7] = lastVertexId - 3; } indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr; } modernRenderer.Render4InnerPicking(arg, indexBufferPtr); uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1); indexBufferPtr.Dispose(); if (id + 3 == lastVertexId) { return(new uint[] { id + 3, id, }); } else { return(new uint[] { id - 1, id, }); } }
/// <summary> /// 在三角形图元中拾取指定位置的Line /// </summary> /// <param name="arg">渲染参数</param> /// <param name="x">mouse position(Left Down is (0, 0)).</param> /// <param name="y">mouse position(Left Down is (0, 0)).</param> /// <param name="lastVertexId">三角形图元的最后一个顶点</param> /// <param name="modernRenderer">目标Renderer</param> /// <returns></returns> internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { // 创建临时索引 OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 6, DrawMode.Lines, BufferUsage.StaticDraw); unsafe { var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly); array[0] = lastVertexId - 1; array[1] = lastVertexId - 0; array[2] = lastVertexId - 2; array[3] = lastVertexId - 1; array[4] = lastVertexId - 0; array[5] = lastVertexId - 2; buffer.UnmapBuffer(); } // 用临时索引渲染此三角形图元(仅渲染此三角形图元) modernRenderer.Render4InnerPicking(arg, buffer); // id是拾取到的Line的Last Vertex Id uint id = ColorCodedPicking.ReadStageVertexId(x, y); buffer.Dispose(); // 对比临时索引,找到那个Line if (id + 2 == lastVertexId) { return(new uint[] { id + 2, id, }); } else { return(new uint[] { id - 1, id, }); } }
internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { ZeroIndexBufferPtr zeroIndexBufferPtr = modernRenderer.IndexBufferPtr; ZeroIndexBufferPtr indexBufferPtr = null; // when the temp index buffer could be long, it's no longer needed. // what a great OpenGL API design! using (var buffer = new ZeroIndexBuffer(DrawMode.LineLoop, zeroIndexBufferPtr.FirstVertex, zeroIndexBufferPtr.VertexCount)) { indexBufferPtr = buffer.GetBufferPtr() as ZeroIndexBufferPtr; } modernRenderer.Render4InnerPicking(arg, indexBufferPtr); uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1); indexBufferPtr.Dispose(); if (id == zeroIndexBufferPtr.FirstVertex) { return(new uint[] { (uint)(zeroIndexBufferPtr.FirstVertex + zeroIndexBufferPtr.VertexCount - 1), id, }); } else { return(new uint[] { id - 1, id, }); } }
/// <summary> /// 在三角形图元中拾取指定位置的Line /// </summary> /// <param name="arg">渲染参数</param> /// <param name="x">mouse position(Left Down is (0, 0)).</param> /// <param name="y">mouse position(Left Down is (0, 0)).</param> /// <param name="lastVertexId">三角形图元的最后一个顶点</param> /// <param name="modernRenderer">目标Renderer</param> /// <returns></returns> internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { // 创建临时索引 OneIndexBuffer buffer = Buffer.Create(IndexBufferElementType.UInt, 6, DrawMode.Lines, BufferUsage.StaticDraw); unsafe { var array = (uint*)buffer.MapBuffer(MapBufferAccess.WriteOnly); array[0] = lastVertexId - 1; array[1] = lastVertexId - 0; array[2] = lastVertexId - 2; array[3] = lastVertexId - 1; array[4] = lastVertexId - 0; array[5] = lastVertexId - 2; buffer.UnmapBuffer(); } // 用临时索引渲染此三角形图元(仅渲染此三角形图元) modernRenderer.Render4InnerPicking(arg, buffer); // id是拾取到的Line的Last Vertex Id uint id = ColorCodedPicking.ReadStageVertexId(x, y); buffer.Dispose(); // 对比临时索引,找到那个Line if (id + 2 == lastVertexId) { return new uint[] { id + 2, id, }; } else { return new uint[] { id - 1, id, }; } }
/// <summary> /// /// </summary> /// <param name="arg"></param> /// <param name="x">mouse position(Left Down is (0, 0)).</param> /// <param name="y">mouse position(Left Down is (0, 0)).</param> /// <param name="lastVertexId"></param> /// <param name="modernRenderer"></param> /// <returns></returns> internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { ZeroIndexBuffer zeroIndexBuffer = modernRenderer.IndexBuffer; // when the temp index buffer could be long, it's no longer needed. // what a great OpenGL API design! ZeroIndexBuffer indexBuffer = ZeroIndexBuffer.Create(DrawMode.LineLoop, zeroIndexBuffer.FirstVertex, zeroIndexBuffer.RenderingVertexCount, zeroIndexBuffer.PrimCount); modernRenderer.Render4InnerPicking(arg, indexBuffer); uint id = ColorCodedPicking.ReadStageVertexId(x, y); indexBuffer.Dispose(); if (id == zeroIndexBuffer.FirstVertex) { return new uint[] { (uint)(zeroIndexBuffer.FirstVertex + zeroIndexBuffer.RenderingVertexCount - 1), id, }; } else { return new uint[] { id - 1, id, }; } }
/// <summary> /// /// </summary> /// <param name="arg"></param> /// <param name="x">mouse position(Left Down is (0, 0)).</param> /// <param name="y">mouse position(Left Down is (0, 0)).</param> /// <param name="lastVertexId"></param> /// <param name="modernRenderer"></param> /// <returns></returns> internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { ZeroIndexBuffer zeroIndexBuffer = modernRenderer.IndexBuffer; // when the temp index buffer could be long, it's no longer needed. // what a great OpenGL API design! ZeroIndexBuffer indexBuffer = ZeroIndexBuffer.Create(DrawMode.LineLoop, zeroIndexBuffer.FirstVertex, zeroIndexBuffer.RenderingVertexCount, zeroIndexBuffer.PrimCount); modernRenderer.Render4InnerPicking(arg, indexBuffer); uint id = ColorCodedPicking.ReadStageVertexId(x, y); indexBuffer.Dispose(); if (id == zeroIndexBuffer.FirstVertex) { return(new uint[] { (uint)(zeroIndexBuffer.FirstVertex + zeroIndexBuffer.RenderingVertexCount - 1), id, }); } else { return(new uint[] { id - 1, id, }); } }
/// <summary> /// /// </summary> /// <param name="arg"></param> /// <param name="x">mouse position(Left Down is (0, 0)).</param> /// <param name="y">mouse position(Left Down is (0, 0)).</param> /// <param name="lastVertexId"></param> /// <param name="modernRenderer"></param> /// <returns></returns> internal override uint[] Search(RenderEventArgs arg, int x, int y, uint lastVertexId, ZeroIndexRenderer modernRenderer) { OneIndexBuffer buffer = Buffer.Create(IndexBufferElementType.UInt, 6, DrawMode.Lines, BufferUsage.StaticDraw); unsafe { var array = (uint*)buffer.MapBuffer(MapBufferAccess.WriteOnly); array[0] = lastVertexId - 2; array[1] = lastVertexId - 0; array[2] = lastVertexId - 4; array[3] = lastVertexId - 2; array[4] = lastVertexId - 0; array[5] = lastVertexId - 4; buffer.UnmapBuffer(); } modernRenderer.Render4InnerPicking(arg, buffer); uint id = ColorCodedPicking.ReadStageVertexId(x, y); buffer.Dispose(); if (id + 4 == lastVertexId) { return new uint[] { id + 4, id, }; } else { return new uint[] { id - 2, id, }; } }