opengl 矩阵变换-白红宇

opengl 矩阵变换

阅读量：6160 次

发布时间：2019-06-21

本文共 1440 字，大约阅读时间需要 4 分钟。

#include 
     
      #include 
      
       #include 
       
        GLfloat  step=0.0,s=0.1;void CALLBACK  display();void CALLBACK display(){        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);   glMatrixMode(GL_PROJECTION);   glLoadIdentity();	   s+=0.005;   if(s>1.0)s=0.1;        glPushMatrix();   glScalef(s,s,s);   //glRotatef(step,0.0,1.0,0.0); //沿y轴旋转   glRotatef(step,0.0,0.0,-1.0);//沿z轴旋转（绕Z轴旋转时，大于0，表示逆时针旋转。小于0顺时针旋转）   //glRotatef(step,1.0,0.0,0.0);   //对物体进行数学描写叙述   glBegin(GL_POLYGON);   		glColor3f(0.0,1.0,1.0);		glVertex2f(-0.4,-0.4);		glColor3f(1.0,0.0,0.0);		glVertex2f(0.0,0.0);		glColor3f(1.0,0.0,1.0);		glVertex2f(-0.4,0.4);          glEnd();    glBegin(GL_LINES);   		glColor3f(0.0,1.0,1.0);		glVertex2f(0.0,-0.2);				glColor3f(1.0,0.0,1.0);		glVertex2f(0.0,0.2);          glEnd();    glBegin(GL_POLYGON);   		glColor3f(0.0,1.0,1.0);		glVertex2f(0.4,-0.4);		glColor3f(1.0,0.0,0.0);		glVertex2f(0.0,0.0);		glColor3f(1.0,0.0,1.0);		glVertex2f(0.4,0.4);          glEnd();     glPopMatrix();      glFlush();   auxSwapBuffers();}void CALLBACK stepDisplay (void){	step = step + 0.13;	if (step >360.0)		step = step -360.0;	display();}void main(){	//初始化窗体（设置窗体的名称坐标尺寸和显示模式）   auxInitDisplayMode(AUX_SINGLE|AUX_RGBA);   auxInitPosition(0,0,600,600);   auxInitWindow("openG");   glClearColor(0.0,0.0,0.0,0.0);   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);   auxIdleFunc (stepDisplay);         auxMainLoop(display);}