[OpenGL]利用地球绕日旋转做的简单的光照效果

来源：互联网发布：python 量化交易教程编辑：程序博客网时间：2024/04/28 14:45
#include < gl/glut.h> #define WIDTH 400 #define HEIGHT 400 static GLfloat angle = 0.0f; void myDisplay(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // 创建透视效果视图 glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(90.0f, 1.0f, 1.0f, 20.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0.0, 5.0, -10.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); // 定义太阳光源，它是一种白色的光源 { GLfloat sun_light_position[] = {0.0f, 0.0f, 0.0f, 1.0f}; GLfloat sun_light_ambient[]  = {0.0f, 0.0f, 0.0f, 1.0f}; GLfloat sun_light_diffuse[]  = {1.0f, 1.0f, 1.0f, 1.0f}; GLfloat sun_light_specular[] = {1.0f, 1.0f, 1.0f, 1.0f}; glLightfv(GL_LIGHT0, GL_POSITION, sun_light_position); glLightfv(GL_LIGHT0, GL_AMBIENT,  sun_light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE,  sun_light_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, sun_light_specular); glEnable(GL_LIGHT0); glEnable(GL_LIGHTING); glEnable(GL_DEPTH_TEST); } // 定义太阳的材质并绘制太阳 { GLfloat sun_mat_ambient[]  = {0.0f, 0.0f, 0.0f, 1.0f}; GLfloat sun_mat_diffuse[]  = {0.0f, 0.0f, 0.0f, 1.0f}; GLfloat sun_mat_specular[] = {0.0f, 0.0f, 0.0f, 1.0f}; GLfloat sun_mat_emission[] = {0.5f, 0.0f, 0.0f, 1.0f}; GLfloat sun_mat_shininess  = 0.0f; glMaterialfv(GL_FRONT, GL_AMBIENT,   sun_mat_ambient); glMaterialfv(GL_FRONT, GL_DIFFUSE,   sun_mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR,  sun_mat_specular); glMaterialfv(GL_FRONT, GL_EMISSION,  sun_mat_emission); glMaterialf (GL_FRONT, GL_SHININESS, sun_mat_shininess); glutSolidSphere(2.0, 40, 32); } // 定义地球的材质并绘制地球 { GLfloat earth_mat_ambient[]  = {0.0f, 0.0f, 0.5f, 1.0f}; GLfloat earth_mat_diffuse[]  = {0.0f, 0.0f, 0.5f, 1.0f}; GLfloat earth_mat_specular[] = {0.0f, 0.0f, 1.0f, 1.0f}; GLfloat earth_mat_emission[] = {0.0f, 0.0f, 0.0f, 1.0f}; GLfloat earth_mat_shininess  = 30.0f; glMaterialfv(GL_FRONT, GL_AMBIENT,   earth_mat_ambient); glMaterialfv(GL_FRONT, GL_DIFFUSE,   earth_mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR,  earth_mat_specular); glMaterialfv(GL_FRONT, GL_EMISSION,  earth_mat_emission); glMaterialf (GL_FRONT, GL_SHININESS, earth_mat_shininess); glRotatef(angle, 0.0f, -1.0f, 0.0f); glTranslatef(5.0f, 0.0f, 0.0f); glutSolidSphere(2.0, 40, 32); } glutSwapBuffers(); } void myIdle(void) { angle += 1.0f; if( angle >= 360.0f ) angle = 0.0f; myDisplay(); } int main(int argc, char* argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE); glutInitWindowPosition(200, 200); glutInitWindowSize(WIDTH, HEIGHT); glutCreateWindow("OpenGL光照演示"); glutDisplayFunc(&myDisplay); glutIdleFunc(&myIdle); glutMainLoop(); return 0; }