drawing

问题 I have to make a program that uses C# Generated Graphics to make a replica of my name that I wrote in cursive. Twist is, I have to use Bezier Curves. I've already called a function to make Bezier Curves using 4 points and a gravity concept. My question to you is, What would be the easiest way to make around 10 curves. Here is my function for a Bezier Curve. public static void bezierCurve( Graphics g, double p1x, double p1y, double p2x, double p2y, double p3x, double p3y, double p4x, double

问题 I need to display a set of signals. Each signal is defined by millions of samples. Just processing the collection (for converting samples to points according to bitmap size) of samples takes a significant amount of time (especially during scrolling). So I implemented some kind of downsampling. I just skip some points: take every 2nd, every 3rd, every 50th point depending on signal characteristics. It increases speed very much but significantly distorts signal form. Are there any smarter

问题 I need to display a set of signals. Each signal is defined by millions of samples. Just processing the collection (for converting samples to points according to bitmap size) of samples takes a significant amount of time (especially during scrolling). So I implemented some kind of downsampling. I just skip some points: take every 2nd, every 3rd, every 50th point depending on signal characteristics. It increases speed very much but significantly distorts signal form. Are there any smarter

问题 I have set image's content mode aspect fit. Now issue is that, when I'm drawing line on image, that time image's content mode set scaletofill and my image stretched. So I want solution for when I'm drawing line on image, image content mode remain same. U can download myproject from this link. I'm using following code: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { if(self.tempImage.image==nil) { return; } colorPicker.hidden = YES; UITouch *touch = [touches anyObject];

问题 I'm new with the FabricJS library and I used it for the following, I have a draggable object on the left side of my screen, which is only drag-able in an y direction. A function reads out the y position of this object and then it depends the height of my triangle which needs to be drawn. But after 2-3 seconds of drawing the triangle dissapears and doesn't show again.... This is my code. function drawObject() { if (being_dragged == true && y <= 440) { document.getElementById(element).style.top

问题 I have set image's content mode aspect fit. Now issue is that, when I'm drawing line on image, that time image's content mode set scaletofill and my image stretched. So I want solution for when I'm drawing line on image, image content mode remain same. U can download myproject from this link. I'm using following code: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { if(self.tempImage.image==nil) { return; } colorPicker.hidden = YES; UITouch *touch = [touches anyObject];

问题 I have code in my iPhone app to draw a pie chart in a UIView. All is great but I need to be able to use a chalk-like texture to draw the outlines and then to fill in the different colours of the pie chart. Here are extracts from the existing code for each area: Drawing the circle around the pie chart: CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextSetRGBStrokeColor(ctx, 1.0, 1.0, 1.0, 1.0); CGContextSetLineWidth(ctx, 8.0); // Draw a thin line around the circle CGContextAddArc(ctx,

问题 I have a WPF application using InkCanvas. When I render the bitmap, save to a memory stream, write the resulting bytes to a file, and then open that file in paint, the image is mangled. Any idea what I may be doing wrong here? Tried several solutions found here on SO and also on codeproject. It's pretty clear that it's capturing part of the InkCanvas but the majority of it is black (I assume null bytes). EDIT: also tried with/without margin. Here are the other links I've tried: https://social

问题 In c# forms I have created a new paint method: private void thisPolygon(PaintEventArgs e) { Pen clrBlue = new Pen(Color.Blue, 3); Point[] Wst = new Point[5]; Wst[0] = new Point(20, 350); Wst[1] = new Point(110, 200); Wst[2] = new Point(200, 190); Wst[3] = new Point(210, 275); Wst[4] = new Point(190, 400); Wst[5] = new Point(50, 390); e.Graphics.DrawPolygon(clrBlue, Wst); } Now, how do I call it? I can't make it work, this doesn't work: private void Form1_Load(object sender, EventArgs e) {

问题 How can i change the mouse pointer to an image when clicked on the image in c#? 回答1: The question is vague/unclear but perhaps you want to change the system cursor (not just your application)? Here is a link to the pinvoke info for SetSystemCursor. Be warned this is considered bad form. 回答2: This MSDN article explains how you would do it with WPF. Just change their drop-down to a OnClick for the image you're interested in. You could likely also hook in to an OnClick event in WinForms too, but