要求用opengl绘制简单的房子,并可以通过鼠标进行视角的转动
时间: 2024-02-12 20:07:57 浏览: 32
好的,你需要先安装OpenGL和GLUT库。然后你可以使用以下代码来绘制简单的房子,并且可以通过鼠标进行视角的转动。这里我提供一个基于C++的例子代码:
```c++
#include <GL/glut.h>
// 视角旋转相关变量
int lastX, lastY;
int curX, curY;
float angleX = 0.0f;
float angleY = 0.0f;
float distanceZ = -5.0f;
// 绘制房子
void drawHouse()
{
// 绘制房子的四面墙
glBegin(GL_QUADS);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 1.0f);
glVertex3f(1.0f, -1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, -1.0f, 1.0f);
glVertex3f(1.0f, -1.0f, -1.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(-1.0f, -1.0f, -1.0f);
glVertex3f(1.0f, -1.0f, -1.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glColor3f(1.0f, 1.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 1.0f);
glVertex3f(-1.0f, -1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glEnd();
// 绘制房子的屋顶
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 1.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 2.0f, 0.0f);
glColor3f(0.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glVertex3f(0.0f, 2.0f, 0.0f);
glColor3f(1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f(0.0f, 2.0f, 0.0f);
glColor3f(0.5f, 0.5f, 0.5f);
glVertex3f(-1.0f, 1.0f, -1.0f);
glVertex3f(-1.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 2.0f, 0.0f);
glEnd();
}
// 初始化OpenGL窗口
void init()
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glEnable(GL_DEPTH_TEST);
}
// 绘制OpenGL场景
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0f, 0.0f, distanceZ);
glRotatef(angleX, 1.0f, 0.0f, 0.0f);
glRotatef(angleY, 0.0f, 1.0f, 0.0f);
drawHouse();
glutSwapBuffers();
}
// 处理鼠标事件
void mouse(int button, int state, int x, int y)
{
if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN)
{
lastX = curX = x;
lastY = curY = y;
}
}
// 处理鼠标拖拽事件
void motion(int x, int y)
{
curX = x;
curY = y;
angleY += (curX - lastX) * 0.1f;
angleX += (curY - lastY) * 0.1f;
lastX = curX;
lastY = curY;
glutPostRedisplay();
}
// 处理窗口变化事件
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);
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(800, 600);
glutCreateWindow("OpenGL House Demo");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMouseFunc(mouse);
glutMotionFunc(motion);
init();
glutMainLoop();
return 0;
}
```
这个例子代码使用OpenGL绘制了一个简单的房子,并且支持通过鼠标进行视角的转动。你可以自己尝试运行一下这个代码,并且深入学习OpenGL的相关知识。
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