setpixel

I usually use APIs, CDC, and encapsulated internal functions. It's easy to draw lines and circles... I recently learned about computer graphics and had to study the underlying algorithms internally... I will post a few codes here to share with you! (

At ordinary times, used to the API, CDC and encapsulated internal functions, about drawing lines, draw a circle these things are at your fingertips ... Recently learning computer graphics, have to go deep inside the bottom of the algorithm ... Put

Computer Graphics (MFC) circleKey points: Read 674 comments 0Font size: large, medium, small //////////////////////////////////////// //////////////////////////// // Circle by the incircle integer algorithm // ////////////////////////////////////////

I. File Format Bmp files are commonly used bitmap files, which are widely used in games and other fields. There are also a bunch of ready-made APIs for processing bmp files. However, how can we resolve such files on our own? In order to eliminate

After opening it, you can click the mouse on the screen, or press and hold the left mouse button without moving it over the screen. The circle ripple and ripple will appear. It is very beautiful, just like the real water, very beautiful. 1. Set the

Over the past decade, many new software technologies and platforms have emerged. Each new technology requires specialized knowledge to create applications with good performance. Program . As various Internet technologies (such as blogs) make it

Scanning line-General polygon Filling Algorithm The algorithm has the following learning points: (1) Positive and Negative 1 Thoughts (2) Processing of Boundary Conditions (3) Data Structure Selection Code:Sweep. h # Ifndef sweep_h# Define

Private declare function getpixel lib "GDI32" (byval HDC as long, byval X as long, byval y as long) as longPrivate declare function setpixel lib "GDI32" (byval HDC as long, byval X as long, byval y as long, byval crcolor as long) as long'Private

A small Win32 program. Use vc6.0. # Include "stdafx. H" # Include # Include # Include # Define id_timer 1 # Define snownum 500 // snowflake count # Define contrast 50 // contrast # Define ystart 5 // determines the Y coordinate at the

Graphical algorithms: DDA (Digital differential Analyzer)voidLineDDA (intX0,intY0,intXEnd,intyend) { floatDX = xend-x0, dy = yend-y0, steps, K; floatXinerement, yinerement, x = x0, y =y0; if(fabs (DX) >fabs (DY)) {Steps=fabs (DX); } Else{Steps=

Original from: Blog Park small Kinko Image scaling algorithm and speed optimization--(i) Nearest neighbor interpolation Image scaling algorithm and speed optimization--(ii) bilinear interpolation ———————————————————— below are the original ——————————

The GDI drawing consists of the following sections: 1. Drawing of points and lines 2. Draw the Fill area Point SetPixel () and GetPixel () are set pixel points and get pixel points. In theory, all graphics device drivers only need to implement the

C # image brightness adjustment and pseudo-Color Image Processing, The left is the effect, the right is the principle, the right X axis represents the gray level of an image pixel, and the Y axis represents the pseudo-color of RGB three colors. The

Wake up by the toilet, continue to draw the line. Find the SetPixel method in the Texture2d class in the document.1 Public classExample:monobehaviour {2 voidStart () {3Texture2d texture =NewTexture2d ( -, -);4Renderer.material.mainTexture

DDA (Digital differential analyzer)Introduced by the oblique-cut equation of straight lineFor a line segment with a positive slope, if the slope is yk+1 = Yk + M (m is the slope determined by the initial point)For line segments with slope >1xk+1 =

Preface: This article tests the bitmap operation (get/setpixel) in GDI +, rather than seeking the fastest Bitmap Processing Method. If you want to increase the speed, use technologies other than GDI +, such as parallel computing, MMX/SSE command

# Include # Include # Include # Include Const int snownumber = 500; // Number of snow points Struct snownode { Point postion; // the location of the snow point. Int icolor; // previous color Int ispeed; // Fall speed Int imove; // The dropping

Method 1: This method actually uses a library for reading bitmap in The Book of classic VC image processing, Without this function library, there is not much practical value.This method directly uses the function library for reading and displaying

Overall: for common BMP \ DIB format images, The LoadImage () function is provided in GDI; the OleLoadPicture () function is provided for files in formats such as PNP, JPG, GIF, and VC ++. I, 1. Create a single-document application and add functions

Like the raster line algorithm, each step is sampled at the interval unit and determines the nearest pixel position from the specified circle. To reduce the amount of computation, the circle can be eight points, according to the Bresenham line