这是我第一次使用sharpdx在屏幕上绘制椭圆，我这里有这段代码（使用c#.net框架windows窗体），我不知道为什么，有两个问题：
我也想尽可能优化我的代码！
这是我的代码：
private WindowRenderTarget _renderTarget;
private Ellipse el;
private Stopwatch _stopwatch = new Stopwatch();
private int _frameCount;
private string _gpuDescription;
public Form1()
{
InitializeComponent();
InitializeDirect2D();
el = new Ellipse
{
RadiusX = 50,
RadiusY = 50,
Point = new RawVector2(ClientSize.Width / 2.0f, ClientSize.Height / 2.0f)
};
using (var factory = new SharpDX.DXGI.Factory1())
{
using (var adapter = factory.GetAdapter1(0))
{
_gpuDescription = adapter.Description.Description;
}
}
this.Text = _gpuDescription;
}
private void InitializeDirect2D()
{
var dpi = this.CreateGraphics().DpiX;
var properties = new HwndRenderTargetProperties
{
Hwnd = this.Handle,
PixelSize = new Size2(this.ClientSize.Width, this.ClientSize.Height),
PresentOptions = PresentOptions.None
};
var renderTargetProperties = new RenderTargetProperties
{
DpiX = dpi,
DpiY = dpi,
Type = RenderTargetType.Hardware,
Usage = RenderTargetUsage.GdiCompatible,
PixelFormat = new PixelFormat(Format.Unknown, SharpDX.Direct2D1.AlphaMode.Premultiplied)
};
_renderTarget = new WindowRenderTarget(new SharpDX.Direct2D1.Factory(), renderTargetProperties, properties);
}
private void Form1_Load(object sender, EventArgs e)
{
timer1.Start();
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
SolidColorBrush brush = new SolidColorBrush(_renderTarget, new RawColor4(1.0f, 0.0f, 0.0f, 1.0f));
_renderTarget.BeginDraw();
_renderTarget.Clear(new RawColor4(0, 0, 0, 1));
_renderTarget.FillEllipse(el, brush);
_renderTarget.EndDraw();
}
private void Form1_Resize(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
_frameCount++;
if (_stopwatch.ElapsedMilliseconds >= 1000)
{
this.Text = $"FPS: {_frameCount}, GPU: {_gpuDescription}";
_frameCount = 0;
_stopwatch.Restart();
}
}
我希望有人能帮助我解决这些问题，我真的很感激！
你的秒表还没有启动，所以你可以在构造函数中添加这样的东西：
public Form1()
{
InitializeComponent();
InitializeDirect2D();
_stopwatch.Start();
...
}
如果调整窗口大小，您还必须调整渲染目标的大小，就像在表单的调整大小事件上一样：
private void Form1_Resize(object sender, EventArgs e)
{
_renderTarget.Resize(new Size2(ClientSize.Width, ClientSize.Height));
}
对于测量 FPS，您必须使用一个计时器，其滴答间隔低于或等于您的显示器频率（这远非完美，因为它还取决于其他因素，但至少它应该对您更有用），因此将其添加到构造函数也是：
timer1.Interval = 10; // ~16ms or lower if your monitor is 60hz
我有另一个代码，它基本上移动椭圆，但它不起作用。当然，坐标正在改变，但椭圆没有显示出来
代码：
private WindowRenderTarget _renderTarget;
private Ellipse el;
private Stopwatch _stopwatch = new Stopwatch();
private int _frameCount;
private string _gpuDescription;
private float ellipseXPosition = 100; // Starting x-coordinate
private const float MovementSpeed = 2f;
public Form1()
{
InitializeComponent();
InitializeDirect2D();
el = new Ellipse
{
RadiusX = 50,
RadiusY = 50,
Point = new RawVector2(100, 100)
};
using (var factory = new SharpDX.DXGI.Factory1())
{
using (var adapter = factory.GetAdapter1(0))
{
_gpuDescription = adapter.Description.Description;
}
}
_stopwatch.Start();
// Force a repaint
this.Invalidate();
}
private void InitializeDirect2D()
{
var dpi = this.CreateGraphics().DpiX;
var properties = new HwndRenderTargetProperties
{
Hwnd = this.Handle,
PixelSize = new Size2(this.ClientSize.Width, this.ClientSize.Height),
PresentOptions = PresentOptions.None
};
var renderTargetProperties = new RenderTargetProperties
{
DpiX = dpi,
DpiY = dpi,
Type = RenderTargetType.Hardware,
Usage = RenderTargetUsage.GdiCompatible,
PixelFormat = new PixelFormat(Format.Unknown, SharpDX.Direct2D1.AlphaMode.Premultiplied)
};
_renderTarget = new WindowRenderTarget(new SharpDX.Direct2D1.Factory(), renderTargetProperties, properties);
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Console.WriteLine("Form1_Paint method called");
SolidColorBrush brush = new SolidColorBrush(_renderTarget, new RawColor4(1.0f, 0.0f, 0.0f, 1.0f));
_renderTarget.BeginDraw();
_renderTarget.Clear(new RawColor4(0, 0, 0, 1));
// Update the position of the ellipse
el.Point = new RawVector2(ellipseXPosition, 100); // Y-coordinate remains the same
// Rysowanie elipsy
_renderTarget.FillEllipse(el, brush);
_renderTarget.EndDraw();
// Move the ellipse to the right for the next frame
ellipseXPosition += MovementSpeed;
// Check if the ellipse reaches the right boundary and reset its position
if (ellipseXPosition > this.ClientSize.Width)
{
ellipseXPosition = -el.RadiusX; // Reset to the left side of the window
}
}
private void Form1_Resize(object sender, EventArgs e)
{
if (_renderTarget != null)
{
_renderTarget.Resize(new Size2(ClientSize.Width, ClientSize.Height));
}
}
private void timer1_Tick(object sender, EventArgs e)
{
_frameCount++;
if (_stopwatch.ElapsedMilliseconds >= 1000)
{
this.Text = $"FPS: {_frameCount}, GPU: {_gpuDescription}";
_frameCount = 0;
_stopwatch.Restart();
}
}