gl线型和线宽test

#include <Windows.h> #include "glew.h" #pragma comment(lib,"opengl32.lib") #pragma comment(lib,"glu32.lib") #pragma comment(lib,"./glew32.lib") #include <math.h> // #include "glut.h" #include<stdio.h> #include<stdlib.h> #define drawOneLine(x1,y1,x2,y2) glBegin(GL_LINES);glVertex3f((x1),(y1),0); glVertex3f((x2),(y2),0);glEnd(); #define qingxie_ 2.0 // function declear void init (void) { glClearColor (1.0, 1.0, 1.0, 0.0); // Set display-window color to white. glMatrixMode (GL_PROJECTION); // Set projection parameters. gluOrtho2D (0.0, 200.0, 0.0, 150.0); } void show_width_lines(int width,float red,float green,float blue) { glColor3f(red,green,blue); width = 1.0f; float PI = 3.1415926; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glColor3f(red,green,blue); //禁用反走样 glDisable(GL_BLEND); glDisable(GL_LINE_SMOOTH); // line_1 for (int i = 0; i < 8;i++ ) { glLineWidth(width); glBegin(GL_LINE_STRIP); glVertex3f(5,5*(i+1), 0.0); glVertex3f(100,5*(i+1)-qingxie_,0.0); glEnd(); //直线宽度增加0.5 width += 2.0; } //启用反走样 glEnable(GL_BLEND); glEnable(GL_LINE_SMOOTH); glHint(GL_LINE_SMOOTH_HINT, GL_FASTEST); // Antialias the lines glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); //初始化直线宽度 width=1.0; // line_2 glColor4f(0,green,0,1.0); for (int i = 0; i < 8;i++ ) { glLineWidth(width); glBegin(GL_LINE_STRIP); glVertex3f(5, 50+1*(i+1), 0.0); //glVertex3f(50,50+2*(i+1)-qingxie_, 0.0); glVertex3f(80,50+3*(i+1)+qingxie_, 0.0); //glVertex3f(100,50+4*(i+1)-qingxie_, 0.0); glVertex3f(120,50+5*(i+1)+qingxie_, 0.0); glEnd(); //宽度累加 width += 2.0; } glFlush(); } void Line3f(GLfloat fromX, GLfloat fromY, GLfloat fromZ, GLfloat toX, GLfloat toY, GLfloat toZ) { glBegin(GL_LINES); glVertex3f(fromX, fromY, fromZ); glVertex3f(toX, toY, toZ); glEnd(); } void show_dot_lines(int width,float red,float green,float blue) { int PatternMode = 0; //线型模式 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glColor3f(red,green,blue); int Pattern[6]= //定义了6种线型 { //点线 1000100010001000, 表示实际画线的点，反序后转换成16进制就是0x1111 dotted //. . . . . . . . . . . . . . //0x1111, 0x0101, //点划线 1111111111100100 dot dash //____ . ____ . _____ . _____. _____ 0x27FF, //0x1C47, //中心线 1111111111001100 centre line //_____ _ _____ _ _____ _ _____ _ _____ 0x33FF, //虚线 1111110011111100 dashed //____ ____ ____ ____ ____ ____ ____ 0x3F3F, //双点划线 1111111100100100 double dot dash // ____ . . ____ . . ____ . . ____ . . ____ 0x24FF, //三点划线 111111110101010 tri_dot_dash // ____ . . ____ . . ____ . . ____ . . ____ 0x55FF }; static float angle = 0.0; glEnable(GL_BLEND); glEnable(GL_LINE_SMOOTH); glHint(GL_LINE_SMOOTH_HINT, GL_FASTEST); // 反走样的fastest效果，也可以根据需要选择GL_NICEST.etc. glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_LINE_STIPPLE); //初始化直线宽度 width=5.0; // line_2 glColor3f(0,0,blue); for (int i = 0; i<6; i++) { int PatternMode = i; glLineStipple(i, Pattern[PatternMode]); glLineWidth(width); glBegin(GL_LINES); glVertex3f(1,23+i*5, 0.0); glVertex3f(50,23+i*5-qingxie_, 0.0); glEnd(); } width = 1.0; glColor3f(red,0,0); for (int i = 0; i<6; i++) { int PatternMode = i; glLineStipple(i, Pattern[PatternMode]); glLineWidth(width); glBegin(GL_LINES); glVertex3f(2,50+i*5, 0.0); glVertex3f(50,50+i*5-qingxie_, 0.0); glEnd(); } glDisable(GL_LINE_STIPPLE); glDisable(GL_BLEND); glFlush(); } void pointFun() { float red = 1.0,green = 0.5,blue = 0.5; glClear (GL_COLOR_BUFFER_BIT); // 去掉注释就可以看线宽效果了。 //show_width_lines(5,red,green,blue); show_dot_lines(5,red,green,blue); glFlush(); } int main (int argc, char** argv) { glutInit (&argc, argv); // Initialize GLUT. glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); // Set display mode. glutInitWindowPosition (50, 100); // Set top-left display-window position. glutInitWindowSize (1000, 800); // Set display-window width and height. //glutFullScreen(); glutCreateWindow ("An Example OpenGL Program By Qiu"); // Create display window. init(); // Execute initialization procedure. // draw position. glTranslatef(50.0f, 50.0f,0.0f); glutDisplayFunc (pointFun); // Send graphics to display window. glutMainLoop ( );// Send graphics to display window. // Display everything and wait. return 0; }