draw

问题 I am developing a project which requires the image crop feature like camscanner android application,when a picture is taken and when user clicks the crop button, a rectangle overlay should be shown as in camscanner. Where the rectangle path can be stretched to any angle and can perform crop.please do help me with a solution. I was referring to https://github.com/edmodo/cropper . but this as only rectangle overlay with 4 points.please do help me if any one has a link or solution!! 回答1: I had a

问题 After I draw polygon i would like to change opacity of canvas out of polygon i just drawn. I think it might have something to do with clipping but im not sure. Polygon and lines inside should have 100% opacity but everything else (background and lines outside polygon should have 50% opacity) prototypefabric.polygon = { drawPolygon: function () { canvas.on('mouse:down', function (options) { if (options.target && options.target.id == pointArray[0].id) { prototypefabric.polygon.generatePolygon

问题 After I draw polygon i would like to change opacity of canvas out of polygon i just drawn. I think it might have something to do with clipping but im not sure. Polygon and lines inside should have 100% opacity but everything else (background and lines outside polygon should have 50% opacity) prototypefabric.polygon = { drawPolygon: function () { canvas.on('mouse:down', function (options) { if (options.target && options.target.id == pointArray[0].id) { prototypefabric.polygon.generatePolygon

问题 Hi i am haveing some problem with drawing a circle ERROR: "'module' object has no attribute 'circl'" what am I dooing wrong? And also how can I put numbers in circles? ex: (first click is circle with 0 second is circle with 1 and so on) import pygame WHITE = (255, 255, 255) BLUE = ( 0, 0, 255) GREEN = ( 0, 255, 0) RED = (255, 0, 0) TEXTCOLOR = ( 0, 0, 0) (width, height) = (200, 300) running = True def main(): global running, screen pygame.init() screen = pygame.display.set_mode((width, height

问题 I'm writing a program in pygame in which I want to draw circles on several surfaces, so that when I erase a circle (redraw it with the transparent colorkey) I get the picture that was in the layer below back. However, I seem to be stuck at an early step and can't seem to draw a circle on a surface (as opposed to the background display). Here is a minimal example: import pygame pygame.init() width = 400 height = 400 screen = pygame.display.set_mode((width, height)) surf1 = pygame.Surface(

问题 I understand that I have to draw everything in draw(), and it's looping continuously. But I don't want to draw texture again and again, for example I want to create a texture, draw something to texture (not spritebatch). than I will only draw that texture in draw(). Is it possible? What can I use? 回答1: Not drawing it again is a performance optimisation. You should only do that if you really need to. If you do need to do this, create a render target, draw your scene to the render target, and

问题 I have a few objects on the scene and even if I specify that the object A have y= 10 (the highest object), from the TOP camera I can see the bottom objects through the object A. Here is an image from my scene. And only today I found an interesting property that draw order of models matters, I may be wrong. Here is another image where I change the draw order of "ship1", attention: "ship1" is way bellow my scene, if I do ship1.draw(); first, the ship disappears (correct), but if I do ship1.draw

问题 what I'm trying to do is to create chess game in C++ through WINAPI, and since I haven't ever studied them at School I'm having some problems (online documentation is quite bad, I wasn't able to find any example of how to do this) with printing an .ico file with transparency inside my window. I aldready managed to do it with a bitmap image but my Photoshop doesn't let me save a .bmp file with alpha channels and I had to go for something supported by WINAPI and allowed transparency (therefore

问题 I have pixel art creator program, and I have rectangles on canvas that are one field (pixel?). And this is good solution on not huge amount of it (for example 128x128). if i want to create 1024x1024 rectangles on canvas this process is very long, ram usage is about 1-2 gb and after that program runs very slowly. How to optimize this, or create better solution? 回答1: Using a Rectangle to represent each pixel is the wrong way to do this. As a FrameworkElement , every rectangle participates in

问题 I have pixel art creator program, and I have rectangles on canvas that are one field (pixel?). And this is good solution on not huge amount of it (for example 128x128). if i want to create 1024x1024 rectangles on canvas this process is very long, ram usage is about 1-2 gb and after that program runs very slowly. How to optimize this, or create better solution? 回答1: Using a Rectangle to represent each pixel is the wrong way to do this. As a FrameworkElement , every rectangle participates in