opengl 缩放 预览摄像头

时间：2025-03-21 18:27:25

目录

opengl安装：

有的报错：

opengl pyqt渲染缩放

opengl 和控件分屏

opengl旋转

android预览摄像头：

opengl安装：

pip install -U pyopengl

有的报错：

: Attempt to call an undefined function glutIn

问题：使用 pip 安装了 PyOpenGL 包，然后运行程序，结果提示：: Attempt to call an undefined function glutInit

原因：使用 pip 安装的 OpenGL 包是 32 位，与 64 位电脑不匹配，故出现此错误。

解决办法：pip 不能在线安装 64 位的 OpenGL，只能手动下载后安装。
下载地址：
/~gohlke/pythonlibs/#pyopengl

opengl pyqt渲染缩放

import sys
from  import QApplication, QMainWindow
from  import QGLWidget
from  import *
from  import *

class OpenGLWidget(QGLWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        (200, 200)
        self.scale_factor = 1.0

    def initializeGL(self):
        glClearColor(0.0, 0.0, 0.0, 1.0)

    def paintGL(self):
        glClear(GL_COLOR_BUFFER_BIT)
        glLoadIdentity()
        glScalef(self.scale_factor, self.scale_factor, 1.0)
        # 绘制一个简单的三角形
        glBegin(GL_TRIANGLES)
        glColor3f(1.0, 0.0, 0.0)
        glVertex2f(0.0, 1.0)
        glColor3f(0.0, 1.0, 0.0)
        glVertex2f(-1.0, -1.0)
        glColor3f(0.0, 0.0, 1.0)
        glVertex2f(1.0, -1.0)
        glEnd()

    def resizeGL(self, w, h):
        glViewport(0, 0, w, h)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        glOrtho(-2.0, 2.0, -2.0, 2.0, -1.0, 1.0)
        glMatrixMode(GL_MODELVIEW)

    def wheelEvent(self, event):
        # 获取滚轮滚动的距离
        num_degrees = ().y() / 8
        num_steps = num_degrees / 15.0  # 每次缩放15度
        self.scale_factor *= pow(1.1, num_steps)  # 乘以一个缩放因子
        ()

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        ("OpenGL Widget Example")
        (100, 100, 400, 400)
        self.gl_widget = OpenGLWidget(self)
        (self.gl_widget)

if __name__ == '__main__':
    app = QApplication()
    window = MainWindow()
    ()
    (app.exec_())

opengl 和控件分屏

import sys

from  import QPixmap
from  import QApplication, QMainWindow, QSplitter, QLabel
from  import QGLWidget
from  import *
from  import *


class OpenGLWidget(QGLWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        (200, 200)
        self.scale_factor = 1.0

    def initializeGL(self):
        glClearColor(0.0, 0.0, 0.0, 1.0)

    def paintGL(self):
        glClear(GL_COLOR_BUFFER_BIT)
        glLoadIdentity()
        glScalef(self.scale_factor, self.scale_factor, 1.0)
        # 绘制一个简单的三角形
        glBegin(GL_TRIANGLES)
        glColor3f(1.0, 0.0, 0.0)
        glVertex2f(0.0, 1.0)
        glColor3f(0.0, 1.0, 0.0)
        glVertex2f(-1.0, -1.0)
        glColor3f(0.0, 0.0, 1.0)
        glVertex2f(1.0, -1.0)
        glEnd()

    def resizeGL(self, w, h):
        glViewport(0, 0, w, h)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        glOrtho(-2.0, 2.0, -2.0, 2.0, -1.0, 1.0)
        glMatrixMode(GL_MODELVIEW)

    def wheelEvent(self, event):
        # 获取滚轮滚动的距离
        num_degrees = ().y() / 8
        num_steps = num_degrees / 15.0  # 每次缩放15度
        self.scale_factor *= pow(1.1, num_steps)  # 乘以一个缩放因子
        ()


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        ("OpenGL Widget Example")
        (100, 100, 400, 400)
        self.gl_widget = OpenGLWidget(self)

        splitter = QSplitter()
        (splitter)

        (self.gl_widget)
        self.image_label = QLabel()
        pixmap = QPixmap(r"C:\Users\Administrator\Pictures\mm\pics\005953_4.jpg")  # 替换为你的图片路径
        self.image_label.setPixmap(pixmap)
        (self.image_label)


if __name__ == '__main__':
    app = QApplication()
    window = MainWindow()
    ()
    (app.exec_())

opengl旋转

import sys

from  import Qt
from  import QPixmap, QMouseEvent
from  import QApplication, QMainWindow, QSplitter, QLabel
from  import QGLWidget
from  import *
from  import *


class OpenGLWidget(QGLWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        (200, 200)
        self.scale_factor = 1.0

        self.x_rotation = 0.0
        self.y_rotation = 0.0
        self.z_rotation = 0.0
        self.last_pos = None

    def initializeGL(self):
        glClearColor(0.0, 0.0, 0.0, 1.0)

    def paintGL(self):
        glClear(GL_COLOR_BUFFER_BIT)
        glLoadIdentity()
        glScalef(self.scale_factor, self.scale_factor, 1.0)
        # glTranslatef(0.0, 0.0, -5.0)
        glRotatef(self.x_rotation, 1.0, 0.0, 0.0)
        glRotatef(self.y_rotation, 0.0, 1.0, 0.0)
        glRotatef(self.z_rotation, 0.0, 0.0, 1.0)

        glBegin(GL_TRIANGLES)
        glColor3f(1.0, 0.0, 0.0)
        glVertex2f(0.0, 1.0)
        glColor3f(0.0, 1.0, 0.0)
        glVertex2f(-1.0, -1.0)
        glColor3f(0.0, 0.0, 1.0)
        glVertex2f(1.0, -1.0)
        glEnd()

    def resizeGL(self, w, h):
        glViewport(0, 0, w, h)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        glOrtho(-2.0, 2.0, -2.0, 2.0, -1.0, 1.0)
        glMatrixMode(GL_MODELVIEW)

    def wheelEvent(self, event):
        num_degrees = ().y() / 8
        num_steps = num_degrees / 15.0  # 每次缩放15度
        self.scale_factor *= pow(1.1, num_steps)  # 乘以一个缩放因子
        ()
    def mousePressEvent(self, event: QMouseEvent):
        self.last_pos = ()

    def mouseMoveEvent(self, event: QMouseEvent):
        if self.last_pos is None:
            return
        dx = () - self.last_pos.x()
        dy = () - self.last_pos.y()
        if () & :
            self.x_rotation += dy * 0.5
            self.y_rotation += dx * 0.5
        elif () & :
            self.x_rotation += dy * 0.5
            self.z_rotation += dx * 0.5
        self.last_pos = ()
        ()

    def mouseReleaseEvent(self, event: QMouseEvent):
        self.last_pos = None

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        ("OpenGL Widget Example")
        (100, 100, 800, 400)
        self.gl_widget = OpenGLWidget(self)

        splitter = QSplitter()
        (splitter)

        (self.gl_widget)
        self.image_label = QLabel()
        self.image_label.setFixedSize(400, 400)
        pixmap = QPixmap(r"C:\Users\Administrator\Pictures\mm\pics\005953_4.jpg")  # 替换为你的图片路径
        self.image_label.setPixmap(pixmap)
        (self.image_label)


if __name__ == '__main__':
    app = QApplication()
    window = MainWindow()
    ()
    (app.exec_())

android预览摄像头：

GitHub - ChinaZeng/OpenGLESCameraDemo

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