OpenGL基础（一）2. 画多边形之颜色渐变的圆 月食效果 |
您所在的位置：网站首页 › 颜色渐变画法 › OpenGL基础（一）2. 画多边形之颜色渐变的圆 月食效果 |
OpenGL基础（一）2. 画多边形之颜色渐变的圆 月食效果
|
文章原创 转载请标明出处---------------------------------------------------画圆的函数中 RGB颜色值变化几种效果展示黑白色
void drawCircle(GLdouble radius, GLdouble divide)
{
for (int k = 0; k < divide; k++)
{
x = radius* cos((k / divide) * 2 * PI);
y = radius* sin((k / divide) * 2 * PI);
glColor3f((k/divide), (k / divide), (k / divide));
glVertex3d(x, y, 0.0);
}
}
翠绿色 1 void drawCircle(GLdouble radius, GLdouble divide) 2 { 3 4 for (int k = 0; k < divide; k++) 5 { 6 x = radius* cos((k / divide) * 2 * PI); 7 y = radius* sin((k / divide) * 2 * PI); 8 glColor3f((k / divide), 1.0, (k / divide)); 9 glVertex3d(x, y, 0.0); 10 } 11 }
紫色 glColor3f((k / divide), 0.0, (k / divide) );
完整程序代码如下  
1 //Five edges polygon.
2 //As less code as possible.
3
4 #include "stdafx.h"
5 #include
6 #include
7 #include
8 #include
9
10 const GLdouble PI = 3.1415926;
11 static GLdouble x, y;
12 using namespace std;
13
14 void drawCircle(GLdouble radius, GLdouble divide)
15 {
16
17 for (int k = 0; k < divide; k++)
18 {
19 x = radius* cos((k / divide) * 2 * PI);
20 y = radius* sin((k / divide) * 2 * PI);
21 glColor3f(0.5*(k / divide), (k / divide), (k / divide) );
22 glVertex3d(x, y, 0.0);
23 }
24 }
25
26 void init(void)
27 {
28 glClearColor(0.0, 0.0, 0.0, 0.0);
29 }
30
31 void display(void)
32 {
33 glClear(GL_COLOR_BUFFER_BIT);
34
35
36 glBegin(GL_POLYGON);
37
38 drawCircle(0.8, 100);
39
40 glEnd();
41 glFlush();
42
43 }
44
45
46 int main(int argc, char** argv)
47 {
48 glutInit(&argc, argv);
49 glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
50 glutInitWindowPosition(500, 300);
51 glutInitWindowSize(500, 500);
52 glutCreateWindow("DrawGeometry");
53 init();
54 glutDisplayFunc(display);
55 glutMainLoop();
56 return 0;
57 }
View Code
|
【本文地址】
公司简介
联系我们
今日新闻 |
点击排行 |
|
推荐新闻 |
图片新闻 |
|
专题文章 |