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直线点画模式
1:开启点画模式:glEnable(GL_LINE_STIPPLE);
2:设置当前模式为点画模式:glLineStipple(1, 0x0101);
#include <gl/glut.h> #define drawOneLine(x1,y1,x2,y2) glBegin(GL_LINES); glVertex2f((x1), (y1)); glVertex2f((x2),(y2)); glEnd(); void init() { glClearColor(0.0, 0.0, 0.0, 0.0); glShadeModel(GL_FLAT); } void display(void) { int i; glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 1.0, 1.0); glEnable(GL_LINE_STIPPLE); glLineStipple(1, 0x0101); drawOneLine(50.0, 125.0, 150.0, 125.0); glLineStipple(1, 0x00FF); drawOneLine(150,125.0,250.0,125.0); glLineStipple(1, 0x1C47); drawOneLine(250.0,125.0,350.0,125.0); glLineWidth(5.0); glLineStipple(1, 0x0101); drawOneLine(50.0, 100.0, 150.0, 100.0); glLineStipple(1, 0x00FF); drawOneLine(150, 100.0, 250.0, 100.0); glLineStipple(1, 0x1C47); drawOneLine(250.0, 100.0, 350.0, 100.0); glLineWidth(1.0); glLineStipple(1, 0x1C47); glBegin(GL_LINE_STRIP); for (int i = 0; i < 7;i++) { glVertex2f(50.0 + ((GLfloat)i*50.0),75.0); } glEnd(); for (int i = 0; i < 6;i++) { drawOneLine(50.0 + ((GLfloat)i*50.0), 50.0, 50.0 + ((GLfloat)(i+1)*50.0),50.0); } glLineStipple(5, 0x1C47); drawOneLine(50.0,25.0,350.0,25.0); glDisable(GL_LINE_STIPPLE); glLineStipple(5, 0x1C47); drawOneLine(50.0, 10.0, 350.0, 10.0); glFlush(); } void reshape(int w,int h) { glViewport(0, 0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0.0, (GLdouble)w, 0.0, (GLdouble)h); } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(400, 150); glutInitWindowPosition(100, 100); glutCreateWindow(argv[0]); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); glutMainLoop(); return 0; }
直线点画模式
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