写一个python函数,利用opengl,画一个指向箭头,指向方向从相机指向世界坐标的(0,0,0)
时间: 2024-04-09 08:27:49 浏览: 98
以下是一个使用OpenGL绘制指向箭头的Python函数示例:
```python
from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *
def draw_arrow():
glBegin(GL_TRIANGLES)
# 绘制箭头的三角形部分
glVertex3f(0.0, 1.0, 0.0) # 顶点1
glVertex3f(-0.5, 0.0, 0.5) # 顶点2
glVertex3f(0.5, 0.0, 0.5) # 顶点3
glVertex3f(0.0, 1.0, 0.0) # 顶点1
glVertex3f(0.5, 0.0, 0.5) # 顶点2
glVertex3f(0.5, 0.0, -0.5) # 顶点3
glVertex3f(0.0, 1.0, 0.0) # 顶点1
glVertex3f(0.5, 0.0, -0.5) # 顶点2
glVertex3f(-0.5, 0.0, -0.5) # 顶点3
glVertex3f(0.0, 1.0, 0.0) # 顶点1
glVertex3f(-0.5, 0.0, -0.5) # 顶点2
glVertex3f(-0.5, 0.0, 0.5) # 顶点3
# 绘制箭头的矩形部分
glVertex3f(-0.1, 0.0, 0.5) # 顶点1
glVertex3f(0.1, 0.0, 0.5) # 顶点2
glVertex3f(0.1, 0.0, -0.5) # 顶点3
glVertex3f(-0.1, 0.0, 0.5) # 顶点1
glVertex3f(0.1, 0.0, -0.5) # 顶点2
glVertex3f(-0.1, 0.0, -0.5) # 顶点3
glEnd()
def draw_scene():
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
gluLookAt(3, 3, 3, 0, 0, 0, 0, 1, 0) # 设置相机位置和朝向
glColor3f(1.0, 1.0, 1.0) # 设置箭头颜色为白色
draw_arrow()
glutSwapBuffers()
def main():
glutInit()
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(800, 600)
glutCreateWindow(b"Arrow")
glEnable(GL_DEPTH_TEST)
glutDisplayFunc(draw_scene)
glutMainLoop()
if __name__ == "__main__":
main()
```
你可以运行这个代码,并在OpenGL窗口中看到一个指向箭头,指向从相机指向世界坐标的(0,0,0)。请确保你的环境中安装了OpenGL库和相关依赖。
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