OpenGL学习三：绘制矢量图形模型

glBegin(GL_TRIANGLES);
? glVertex3f( 0.0f, 1.0f, 0.0f);
? glVertex3f(-1.0f,-1.0f, 0.0f);
? glVertex3f( 1.0f,-1.0f, 0.0f);
?glEnd();

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begin end 中间是构成矢量图形的点

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#define GL_POINTS???????????????????????? 0x0000
#define GL_LINES????????????????????????? 0x0001
#define GL_LINE_LOOP????????????????????? 0x0002
#define GL_LINE_STRIP???????????????????? 0x0003
#define GL_TRIANGLES????????????????????? 0x0004
#define GL_TRIANGLE_STRIP???????????????? 0x0005
#define GL_TRIANGLE_FAN?????????????????? 0x0006
#define GL_QUADS????????????????????????? 0x0007
#define GL_QUAD_STRIP???????????????????? 0x0008
#define GL_POLYGON??????????????????????? 0x0009

#include "header.h"GLvoid ReSizeGLScene(GLsizei width, GLsizei height){if (height==0){height=1;}glViewport(0,0,width,height);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(25.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity();}int InitGL(void){glShadeModel(GL_SMOOTH);glClearColor(0.0f, 0.0f, 0.0f, 0.5f);glClearDepth(1.0f);glEnable(GL_DEPTH_TEST);glDepthFunc(GL_LEQUAL);glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);return TRUE;}void DrawGLScene(void){glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glLoadIdentity();glTranslatef(-1.5f,0.0f,-6.0f);glBegin(GL_TRIANGLES);glVertex3f( 0.0f, 1.0f, 0.0f);glVertex3f(-1.0f,-1.0f, 0.0f);glVertex3f( 1.0f,-1.0f, 0.0f);glEnd();glTranslatef(3.0f,0.0f,0.0f);glBegin(GL_QUADS);glVertex3f(-1.0f, 1.0f, 0.0f);glVertex3f( 1.0f, 1.0f, 0.0f);glVertex3f( 1.0f,-1.0f, 0.0f);glVertex3f(-1.0f,-1.0f, 0.0f);glEnd();glFlush();}int main(int argc, char** argv){glutInit(&argc, argv);glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);glutInitWindowSize(640,480);glutCreateWindow("2D图形");glutReshapeFunc(ReSizeGLScene);glutDisplayFunc(DrawGLScene);InitGL();glutMainLoop();return 0;}

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