OpenGl Test.

来源：互联网发布：知言善行的意思编辑：程序博客网时间：2024/06/10 12:46

opengl Test.

所用opengl内容：

GLfloat 一种类型，可兼容32或者64位

glClear()清屏

glPushmatrix()压入当前矩阵堆栈

glPopMatrix()出stack

glRotatef()旋转

glColor3f()RGB颜色

glRectf()填充一个四方形

glutSwapBuffers()双缓存

#include <gl\glut.h>#include <stdlib.h>static GLfloat spin = 0.0;void init(void){glClearColor(0.0, 0.0, 0.0, 0.0);glShadeModel(GL_FLAT);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glPushMatrix();glRotatef(spin, 0.0, 0.0, 1.0);glColor3f(1.0, 1.0, 1.0);glRectf(-25.0, -25.0, 25.0, 25.0);glPopMatrix();glutSwapBuffers();}void spinDisplay(void){spin = spin + 2.0;if (spin > 360.0)spin = spin - 360.0;glutPostRedisplay();}void reshape(int w, int h){glViewport(0, 0, (GLsizei)w, (GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();// 将当前的用户坐标系的原点移到了屏幕中心：类似于一个复位操作glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);glMatrixMode(GL_MODELVIEW);//指定哪一个矩阵是当前矩阵glLoadIdentity();}void mouse(int button, int state, int x, int y){switch (button){case GLUT_LEFT_BUTTON:if (state == GLUT_DOWN)glutIdleFunc(spinDisplay);// 点击鼠标后，开始执行旋转逻辑。break;case GLUT_MIDDLE_BUTTON:if (state == GLUT_DOWN)glutIdleFunc(NULL);break;default:break;}}int main(int argc, char** argv){glutInit(&argc, argv);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);glutInitWindowSize(250, 250);glutInitWindowPosition(100, 100);glutCreateWindow(argv[0]);init();glutDisplayFunc(display);// 绘制glutReshapeFunc(reshape);// 窗口大小发生变化时glutMouseFunc(mouse);// 鼠标事件glutMainLoop();// 开始return 0;}

0 0