OpenGL 实现模拟太阳系运动

来源：互联网发布：数据挖掘工程师编辑：程序博客网时间：2024/09/21 09:28

#include <gl/glut.h>static int year = 0, day = 0;static int sun = 0;void init(){glClearColor(0.0, 0.0, 0.0, 0.0);glShadeModel(GL_FLAT);}void display(){glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0, 1.0, 1.0);glPushMatrix();glRotatef((GLfloat)sun, 0.0, 1.0, 0.0);glutWireSphere(1.0, 20, 16);glRotatef((GLfloat)year, 0.0, 1.0, 0.0);glTranslatef(2.0, 0.0, 0.0);glRotatef((GLfloat) day, 0.0, 1.0, 0.0);glutWireSphere(0.2, 10, 8);glPopMatrix();glutSwapBuffers();}void reshape(int w, int h){glViewport(0, 0, (GLsizei)w, (GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0);glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);}void keyboard(unsigned char key, int x, int y){switch (key){case 'd':day = (day + 10) % 360;sun = (sun + 1) % 360;glutPostRedisplay();break;case 'D':day = (day - 10) % 360;sun = (sun + 1) % 360;glutPostRedisplay();break;case 'y':year = (year + 5) % 360;sun = (sun + 1) % 360;glutPostRedisplay();break;case 'Y':year = (year - 5) % 360;sun = (sun + 1) % 360;glutPostRedisplay();break;default:break;}}int main(int argc, char **argv){glutInit(&argc, argv);glutInitWindowSize(500, 500);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);glutInitWindowPosition(100, 100);glutCreateWindow(argv[0]);init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutKeyboardFunc(keyboard);glutMainLoop();return 0;}

太阳系会自己转动，行星会自传以及绕着太阳进行旋转，因此行星先进性绕着太阳的转动在全局坐标系进行旋转，之后偏移到指定的位置，然后在自己的局部坐标系中进行自传

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