计算机图形学-图形几何变换
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了计算机图形学-图形几何变换相关的知识,希望对你有一定的参考价值。
内容:金字塔的平移以及旋转的实现,通过鼠标控制金字塔的转速以及运行窗口的退出
#include <GL/glut.h> #include <stdlib.h> GLfloat rtri;//金字塔旋转角度 float add = 0.1f; void init(void) { glClearColor(0.0f, 0.0f, 0.0f, 0.0f); glShadeModel(GL_SMOOTH);//设为smooth处理方式,注意看区别 glEnable(GL_DEPTH_TEST);//激活深度测试 } void display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //清除颜色缓存和深度缓存 glLoadIdentity(); glTranslatef(-1.5f, 0.0f, -6.0f); glRotatef(rtri, 0.0f, 1.0f, 0.0f); glBegin(GL_TRIANGLES); glColor3f(1.0f, 0.0f, 0.0f); glVertex3f(0.0f, 1.0f, 0.0f); glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(1.0f, -1.0f, 1.0f); glColor3f(1.0f, 0.0f, 0.0f); glVertex3f(0.0f, 1.0f, 0.0f); glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(1.0f, -1.0f, 1.0f); glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); glColor3f(1.0f, 0.0f, 0.0f); glVertex3f(0.0f, 1.0f, 0.0f); glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); glColor3f(1.0f, 0.0f, 0.0f); glVertex3f(0.0f, 1.0f, 0.0f); glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glEnd(); rtri += add;//加一个角度 glutSwapBuffers();//交换双缓存 } void reshape(int width, int height) { glViewport(0, 0, width, height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void MousePlot(GLint button, GLint action, GLint xMouse, GLint yMouse) { if (button == GLUT_LEFT_BUTTON && action == GLUT_DOWN) { if (add == 0) add = 0.1f; add = add * 2; } if (button == GLUT_RIGHT_BUTTON && action == GLUT_DOWN){ if (add == 0) add = 0.1f; add = add / 2; } if (button == GLUT_MIDDLE_BUTTON && action == GLUT_DOWN) exit(0); glutPostRedisplay(); // 刷新窗口 } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);//使用双缓存模式和深度缓存 glutInitWindowSize(640, 480); glutInitWindowPosition(100, 100); glutCreateWindow("Transform2"); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); glutIdleFunc(display);//设置空闲时调用的函数 glutMouseFunc(MousePlot);//鼠标响应 glutMainLoop(); return 0; }
以上是关于计算机图形学-图形几何变换的主要内容,如果未能解决你的问题,请参考以下文章