OpenGL基本图形的绘制.docx

1.使用glColor,glPointSize函数绘制三个不同颜色和大小的点/ T.cpp : Defines the entry point for the console application./#include stdafx.h#include void Display(void) glClear(GL_COLOR_BUFFER_BIT); glPointSize(5.0f); glBegin(GL_POINTS); glColor3f(1.0,0.0,0.0); glVertex2f(0.3f,0.5f); glEnd(); glPointSize(8.0f); glBegin(GL_POINTS); glColor3f(0.0,1.0,0.0); glVertex2f(0.0f,0.0f); glEnd(); glPointSize(10.0f); glBegin(GL_POINTS); glColor3f(0.0,0.0,1.0); glVertex2f(-0.3f,-0.5f); glEnd(); glFlush(); int main(int argc,char* argv) glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGB); glutInitWindowPosition(200,200); glutInitWindowSize(400,400); glutCreateWindow(Three Point); glutDisplayFunc(&Display); glutMainLoop(); return 0; 2.使用glColor,glLineWidth,glLineStripple函数绘制实心、虚线及渐变色线（1）实心线/ T.cpp : Defines the entry point for the console application./#include stdafx.h#include void Display(void) glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0,0.0,0.0); glEnable(GL_LINE_STIPPLE); glShadeModel(GL_SMOOTH); glLineStipple(2,0xFFFF); glLineWidth(2); glBegin(GL_LINES); glVertex2i(-100,0); glVertex2i(100,0); glEnd(); glFlush(); int main(int argc,char* argv) glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGB); glutInitWindowPosition(200,200); glutInitWindowSize(400,400); glutCreateWindow(Solid Line); glutDisplayFunc(&Display); glutMainLoop(); return 0; （2）虚线/ T.cpp : Defines the entry point for the console application./#include stdafx.h#include void Display(void) glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0,0.0,0.0); glEnable(GL_LINE_STIPPLE); glShadeModel(GL_SMOOTH); glLineStipple(4,0xAAAA); glLineWidth(2); glBegin(GL_LINES); glVertex2i(-100,0); glVertex2i(100,0); glEnd(); glFlush(); int main(int argc,char* argv) glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGB); glutInitWindowPosition(200,200); glutInitWindowSize(400,400); glutCreateWindow(Dotted Line); glutDisplayFunc(&Display); glutMainLoop(); return 0; （3）渐变线/ T.cpp : Defines the entry point for the console application./#include stdafx.h #include GLuint Line; void Initial(void) glClearColor(0.0f, 0.0f, 0.0f, 0.0f); Line = glGenLists(1); glNewList(Line, GL_COMPILE); glTranslatef(-50.0, 20.0, 0.0); glColor3f(255.0, 0.0, 0.0); glLineWidth(2); glBegin(GL_LINES);glColor3f(255.0, 0.0, 0.0);glVertex2i(0,-20);glColor3f(0.0, 0.0, 255.0);glVertex2i(100,-20); glEnd(); glEndList(); void ChangeSize(int w, int h) glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D (-70.0f, 70.0f, -70.0f, 70.0f); void Display(void) glClear(GL_COLOR_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0.0, 0.0, 0.0); glCallList(Line); glFlush(); int main(int argc, char* argv) glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(600,450); glutInitWindowPosition(100,100); glutCreateWindow(渐变色线); glutDisplayFunc(Display); glutReshapeFunc(ChangeSize); Initial(); glutMainLoop(); return 0; 3.使用glColor,glPolygonMode函数绘制纯色、渐变色、轮廓多边形（1）纯色六边形/ a.cpp : Defines the entry point for the console application./#include stdafx.h#include void init() glClearColor (1.0, 1.0, 1.0, 0.0); glMatrixMode (GL_PROJECTION); gluOrtho2D (0.0, 200.0, 0.0, 150.0);void polygon(void) glClear(GL_COLOR_BUFFER_BIT); int p1 = 20, 75; int p2 = 60, 5; int p3 = 140, 5; int p4 = 180, 75; int p5 = 140, 145; int p6 = 60, 145; glColor3f(0.0, 0.5, 1.0); glBegin(GL_POLYGON); glVertex2iv(p1); glVertex2iv(p2); glVertex2iv(p3); glVertex2iv(p4); glVertex2iv(p5); glVertex2iv(p6); glEnd(); glFlush();void main(int argc, char *argv) glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(400, 300); glutCreateWindow(纯色六边形); init(); glutDisplayFunc(polygon); glutMainLoop();（2）渐变色六边形/ a.cpp : Defines the entry point for the console application./#include stdafx.h#include void init() glClearColor (1.0, 1.0, 1.0, 0.0); glMatrixMode (GL_PROJECTION); gluOrtho2D (0.0, 200.0, 0.0, 150.0);void polygon(void) glClear(GL_COLOR_BUFFER_BIT); int p1 = 20, 75; int p2 = 60, 5; int p3 = 140, 5; int p4 = 180, 75; int p5 = 140, 145; int p6 = 60, 145; glColor3f(0.0, 0.5, 1.0); glBegin(GL_POLYGON); glColor3f(0.0,0.0,1.0); glVertex2iv(p1); glColor3f(0.0,1.0,0.0); glVertex2iv(p2); glColor3f(1.0,0.0,0.0); glVertex2iv(p3); glColor3f(0.0,0.0,1.0); glVertex2iv(p4); glColor3f(0.0,1.0,0.0); glVertex2iv(p5); glColor3f(1.0,0.0,0.0); glVertex2iv(p6); glEnd(); glFlush();void main(int argc, char *argv) glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(400, 300); glutCreateWindow(渐变色六边形); init(); glutDisplayFunc(polygon); glutMainLoop();（3）轮廓渐变色六边形/ a.cpp : Defines the entry point for the console application./#include stdafx.h#include void init() glClearColor (1.0, 1.0, 1.0, 0.0); glPolygonMode (GL_FRONT_AND_BACK,GL_LINE); gluOrtho2D (0.0, 200.0, 0.0, 150.0);void polygon(void) glClear(GL_COLOR_BUFFER_BIT); int p1 = 20, 75; int p2 = 60, 5; int p3 = 140, 5; int p4 = 180, 75; int p5 = 140, 145; int p6 = 60, 145; glColor3f(0.0, 0.5, 1.0); glBegin(GL_POLYGON); glColor3f(0.0,0.0,1.0); glVertex2iv(p1); glColor3f(0.0,1.0,0.0); glVertex2iv(p2); glColor3f(1.0,0.0,0.0); glVertex2iv(p3); glColor3f(0.0,0.0,1.0); glVertex2iv(p4); glColor3f(0.0,1.0,0.0); glVertex2iv(