三维效果速度表盘距离pyqt程序

您可以使用PyQt中的QOpenGLWidget和QOpenGLFunctions来实现一个具有三维效果的速度表盘。以下是一个简单的示例代码：

from PyQt5.QtWidgets import QApplication, QMainWindow, QOpenGLWidget
from PyQt5.QtGui import QOpenGLShaderProgram, QOpenGLShader, QColor, QMatrix4x4
from PyQt5.QtCore import Qt, QTimer

class Speedometer(QOpenGLWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.timer = QTimer(self)
        self.timer.timeout.connect(self.update)
        self.timer.start(10)
        self.angle = 0.0

    def initializeGL(self):
        self.gl = self.context().versionFunctions()
        self.gl.initializeOpenGLFunctions()
        self.gl.glClearColor(0.0, 0.0, 0.0, 1.0)
        self.program = QOpenGLShaderProgram(self)
        self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, """
        attribute vec3 a_position;
        attribute vec3 a_normal;
        uniform mat4 u_mvp_matrix;
        varying vec3 v_normal;
        void main() {
            v_normal = a_normal;
            gl_Position = u_mvp_matrix * vec4(a_position, 1.0);
        }
        """)
        self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, """
        varying vec3 v_normal;
        void main() {
            float light = dot(v_normal, vec3(0.0, 0.0, 1.0));
            gl_FragColor = vec4(light, light, light, 1.0);
        }
        """)
        self.program.link()

        self.vertices = [
            (0.0, 0.0, 0.0),
            (0.0, 0.5, 0.0),
            (0.0, 0.5, 0.1),
            (0.0, 0.0, 0.1),
            (0.1, 0.0, 0.0),
            (0.1, 0.5, 0.0),
            (0.1, 0.5, 0.1),
            (0.1, 0.0, 0.1),
        ]
        self.indices = [
            0, 1, 2,
            0, 2, 3,
            0, 4, 5,
            0, 5, 1,
            1, 5, 6,
            1, 6, 2,
            2, 6, 7,
            2, 7, 3,
            3, 7, 4,
            3, 4, 0,
            4, 5, 6,
            4, 6, 7,
        ]
        self.normals = [
            (0.0, 0.0, -1.0),
            (0.0, 0.0, 1.0),
            (-1.0, 0.0, 0.0),
            (1.0, 0.0, 0.0),
            (0.0, -1.0, 0.0),
            (0.0, 1.0, 0.0),
        ]
        self.vbo = self.gl.glGenBuffers(1)
        self.gl.glBindBuffer(self.gl.GL_ARRAY_BUFFER, self.vbo)
        vertices = []
        for i in range(8):
            vertices.extend(self.vertices[i])
            vertices.extend(self.normals[i // 2])
        self.gl.glBufferData(self.gl.GL_ARRAY_BUFFER, len(vertices) * 4, vertices, self.gl.GL_STATIC_DRAW)

        self.ibo = self.gl.glGenBuffers(1)
        self.gl.glBindBuffer(self.gl.GL_ELEMENT_ARRAY_BUFFER, self.ibo)
        self.gl.glBufferData(self.gl.GL_ELEMENT_ARRAY_BUFFER, len(self.indices) * 4, self.indices, self.gl.GL_STATIC_DRAW)

        self.gl.glEnable(self.gl.GL_DEPTH_TEST)

    def resizeGL(self, width, height):
        aspect = width / height
        self.projection = QMatrix4x4()
        self.projection.perspective(45.0, aspect, 0.01, 100.0)

    def paintGL(self):
        self.gl.glClear(self.gl.GL_COLOR_BUFFER_BIT | self.gl.GL_DEPTH_BUFFER_BIT)
        self.gl.glUseProgram(self.program.programId())
        self.gl.glBindBuffer(self.gl.GL_ARRAY_BUFFER, self.vbo)
        self.gl.glEnableVertexAttribArray(0)
        self.gl.glVertexAttribPointer(0, 3, self.gl.GL_FLOAT, False, 24, None)
        self.gl.glEnableVertexAttribArray(1)
        self.gl.glVertexAttribPointer(1, 3, self.gl.GL_FLOAT, False, 24, b"12")
        model = QMatrix4x4()
        model.rotate(self.angle, 0.0, 0.0, 1.0)
        view = QMatrix4x4()
        view.translate(0.0, 0.0, -1.0)
        mvp = self.projection @ view @ model
        loc = self.program.uniformLocation("u_mvp_matrix")
        self.gl.glUniformMatrix4fv(loc, 1, False, mvp.data())
        self.gl.glBindBuffer(self.gl.GL_ELEMENT_ARRAY_BUFFER, self.ibo)
        self.gl.glDrawElements(self.gl.GL_TRIANGLES, len(self.indices), self.gl.GL_UNSIGNED_INT, None)
        self.gl.glDisableVertexAttribArray(0)
        self.gl.glDisableVertexAttribArray(1)
        self.angle += 0.5

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Speedometer")
        self.setCentralWidget(Speedometer())
        self.resize(640, 480)

app = QApplication([])
window = MainWindow()
window.show()
app.exec_()

这个示例程序使用OpenGL实现了一个简单的立方体，并且使用旋转使其具有了动态效果。您可以根据需要修改它来实现您自己的三维效果速度表盘。