MODEL.C
上传用户:tengyuc
上传日期:2007-08-14
资源大小:722k
文件大小:2k
- // 该程序主要演示几何模型变换
- #include <GL/glut.h>
- #include <stdlib.h>
- void init(void)
- {
- glClearColor (0.0, 0.0, 0.0, 0.0);
- glShadeModel (GL_FLAT);
- }
- void draw_triangle(void)
- {
- glBegin (GL_LINE_LOOP);
- glVertex2f(0.0, 25.0);
- glVertex2f(25.0, -25.0);
- glVertex2f(-25.0, -25.0);
- glEnd();
- }
- void display(void)
- {
- glClear (GL_COLOR_BUFFER_BIT);
- glColor3f (1.0, 1.0, 1.0);
- glLoadIdentity ();
- glColor3f (1.0, 1.0, 1.0);
- draw_triangle ();
- glEnable (GL_LINE_STIPPLE);
- glLineStipple (1, 0xF0F0);
- glLoadIdentity ();
- glTranslatef (-20.0, 0.0, 0.0);
- draw_triangle ();
- glLineStipple (1, 0xF00F);
- glLoadIdentity ();
- glScalef (1.5, 0.5, 1.0);
- draw_triangle ();
- glLineStipple (1, 0x8888);
- glLoadIdentity ();
- glRotatef (90.0, 0.0, 0.0, 1.0);
- draw_triangle ();
- glDisable (GL_LINE_STIPPLE);
- glFlush ();
- }
- void reshape (int w, int h)
- {
- glViewport (0, 0, (GLsizei) w, (GLsizei) h);
- glMatrixMode (GL_PROJECTION);
- glLoadIdentity ();
- if (w <= h)
- glOrtho (-50.0, 50.0, -50.0*(GLfloat)h/(GLfloat)w,
- 50.0*(GLfloat)h/(GLfloat)w, -1.0, 1.0);
- else
- glOrtho (-50.0*(GLfloat)w/(GLfloat)h,
- 50.0*(GLfloat)w/(GLfloat)h, -50.0, 50.0, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- }
- void keyboard(unsigned char key, int x, int y)
- {
- switch (key) {
- case 27:
- exit(0);
- break;
- }
- }
- int main(int argc, char** argv)
- {
- glutInit(&argc, argv);
- glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
- glutInitWindowSize (500, 500);
- glutInitWindowPosition (100, 100);
- glutCreateWindow (argv[0]);
- init ();
- glutDisplayFunc(display);
- glutReshapeFunc(reshape);
- glutKeyboardFunc (keyboard);
- glutMainLoop();
- return 0;
- }