317 lines
11 KiB
Python
317 lines
11 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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PANDA3D 3D空间GUI演示
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展示如何在3D场景中使用GUI元素
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"""
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from direct.showbase.ShowBase import ShowBase
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from direct.gui.DirectGui import *
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from direct.gui.OnscreenText import OnscreenText
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from direct.gui.OnscreenImage import OnscreenImage
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from panda3d.core import *
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from direct.task import Task
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class GUI3DDemo(ShowBase):
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def __init__(self):
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ShowBase.__init__(self)
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# 设置背景色
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self.setBackgroundColor(0.1, 0.1, 0.3)
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# 设置相机位置
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self.cam.setPos(0, -10, 0)
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self.cam.lookAt(0, 0, 0)
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# 尝试加载中文字体
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self.chinese_font = self.loadChineseFont()
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# 创建标题（2D界面）
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self.title = OnscreenText(
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text="PANDA3D 3D空间GUI演示",
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pos=(0, 0.9),
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scale=0.08,
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fg=(1, 1, 1, 1),
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align=TextNode.ACenter,
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font=self.chinese_font if self.chinese_font else None
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)
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# 创建基本的2D GUI
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self.create2DGUI()
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# 创建3D场景中的GUI元素
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self.create3DGUI()
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# 加载一个简单的3D模型作为背景
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self.createScene()
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print("3D GUI演示启动成功!")
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print(f"中文字体加载状态: {'成功' if self.chinese_font else '失败，使用默认字体'}")
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print("你可以看到2D界面元素和3D空间中的GUI")
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def loadChineseFont(self):
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"""尝试加载中文字体"""
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import os
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font_paths = [
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'/usr/share/fonts/truetype/wqy/wqy-microhei.ttc',
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'/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc',
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'/usr/share/fonts/truetype/arphic/ukai.ttc',
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'/usr/share/fonts/truetype/arphic/uming.ttc',
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]
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for font_path in font_paths:
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if os.path.exists(font_path):
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try:
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font = self.loader.loadFont(font_path)
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if font:
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return font
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except:
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continue
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return None
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def create2DGUI(self):
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"""创建传统的2D GUI元素"""
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# 控制面板标题
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self.controlTitle = OnscreenText(
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text="控制面板",
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pos=(-1.2, 0.8),
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scale=0.06,
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fg=(1, 1, 0, 1),
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align=TextNode.ALeft,
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font=self.chinese_font if self.chinese_font else None
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)
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# 旋转控制按钮
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self.rotateButton = DirectButton(
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text="旋转场景",
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pos=(-1.2, 0, 0.6),
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scale=0.05,
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command=self.toggleRotation,
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frameColor=(0.2, 0.6, 0.8, 1),
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text_font=self.chinese_font if self.chinese_font else None
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)
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# 颜色变化按钮
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self.colorButton = DirectButton(
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text="变换颜色",
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pos=(-1.2, 0, 0.4),
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scale=0.05,
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command=self.changeColors,
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frameColor=(0.8, 0.2, 0.6, 1),
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text_font=self.chinese_font if self.chinese_font else None
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)
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# 重置按钮
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self.resetButton = DirectButton(
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text="重置",
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pos=(-1.2, 0, 0.2),
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scale=0.05,
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command=self.resetScene,
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frameColor=(0.6, 0.8, 0.2, 1),
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text_font=self.chinese_font if self.chinese_font else None
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)
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# 状态显示
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self.statusText = OnscreenText(
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text="状态: 就绪",
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pos=(-1.2, -0.8),
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scale=0.04,
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fg=(0, 1, 0, 1),
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align=TextNode.ALeft,
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font=self.chinese_font if self.chinese_font else None
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)
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# 退出按钮
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self.exitButton = DirectButton(
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text="退出",
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pos=(1.2, 0, -0.8),
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scale=0.05,
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command=self.exitDemo,
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frameColor=(0.8, 0.2, 0.2, 1),
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text_font=self.chinese_font if self.chinese_font else None
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)
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def create3DGUI(self):
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"""创建3D空间中的GUI元素"""
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# 创建一个在3D空间中的按钮
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# 这实际上是一个2D GUI元素，但我们可以将其父级设置为3D节点
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# 创建3D空间中的文本
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self.text3D = TextNode('3d-text')
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self.text3D.setText("3D空间中的文本")
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self.text3D.setAlign(TextNode.ACenter)
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if self.chinese_font:
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self.text3D.setFont(self.chinese_font)
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self.textNodePath = self.render.attachNewNode(self.text3D)
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self.textNodePath.setPos(0, 5, 2)
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self.textNodePath.setScale(0.5)
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self.textNodePath.setColor(1, 1, 0, 1)
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self.textNodePath.setBillboardAxis() # 让文本总是面向相机
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# 创建另一个3D文本，显示说明
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self.info3D = TextNode('info-text')
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self.info3D.setText("这是3D空间中的GUI元素\n它们可以与3D场景交互")
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self.info3D.setAlign(TextNode.ACenter)
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if self.chinese_font:
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self.info3D.setFont(self.chinese_font)
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self.infoNodePath = self.render.attachNewNode(self.info3D)
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self.infoNodePath.setPos(0, 3, -1)
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self.infoNodePath.setScale(0.3)
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self.infoNodePath.setColor(0, 1, 1, 1)
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self.infoNodePath.setBillboardAxis()
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# 创建一个3D平面作为"虚拟屏幕"
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self.createVirtualScreen()
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def createVirtualScreen(self):
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"""创建一个3D空间中的虚拟屏幕"""
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# 创建一个卡片（平面）
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cm = CardMaker("virtual-screen")
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cm.setFrame(-2, 2, -1, 1)
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self.virtualScreen = self.render.attachNewNode(cm.generate())
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self.virtualScreen.setPos(3, 5, 0)
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self.virtualScreen.setColor(0.2, 0.2, 0.2, 0.8)
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self.virtualScreen.setTransparency(TransparencyAttrib.MAlpha)
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# 在虚拟屏幕上添加文本
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screenText = TextNode('screen-text')
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screenText.setText("虚拟3D屏幕\n\n这里可以显示\n任何信息")
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screenText.setAlign(TextNode.ACenter)
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if self.chinese_font:
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screenText.setFont(self.chinese_font)
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screenTextNP = self.virtualScreen.attachNewNode(screenText)
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screenTextNP.setPos(0, 0.01, 0) # 稍微偏移，避免z-fighting
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screenTextNP.setScale(0.3)
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screenTextNP.setColor(0, 1, 0, 1)
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def createScene(self):
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"""创建3D场景"""
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# 创建一个简单的立方体
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from panda3d.core import CardMaker
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# 创建地面
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cm = CardMaker("ground")
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cm.setFrame(-10, 10, -10, 10)
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ground = self.render.attachNewNode(cm.generate())
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ground.setP(-90) # 旋转成水平面
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ground.setColor(0.5, 0.5, 0.5, 1)
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# 创建一些立方体
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self.cubes = []
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for i in range(3):
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for j in range(3):
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# 使用内置的立方体几何
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cube = self.loader.loadModel("models/environment")
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if not cube:
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# 如果找不到模型，创建一个简单的几何体
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cube = self.render.attachNewNode("cube")
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cube.reparentTo(self.render)
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cube.setPos(-2 + i*2, 2 + j*2, 0.5)
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cube.setScale(0.5)
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cube.setColor(
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0.2 + i*0.3,
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0.2 + j*0.3,
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0.5,
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1
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)
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self.cubes.append(cube)
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# 添加光照
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dlight = DirectionalLight('dlight')
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dlight.setColor((1, 1, 1, 1))
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dlnp = self.render.attachNewNode(dlight)
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dlnp.setHpr(45, -45, 0)
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self.render.setLight(dlnp)
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alight = AmbientLight('alight')
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alight.setColor((0.3, 0.3, 0.3, 1))
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alnp = self.render.attachNewNode(alight)
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self.render.setLight(alnp)
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# 初始化旋转状态
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self.rotating = False
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self.colorIndex = 0
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def toggleRotation(self):
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"""切换场景旋转"""
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if self.rotating:
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self.taskMgr.remove("rotate-scene")
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self.rotating = False
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self.rotateButton['text'] = "旋转场景"
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self.statusText.setText("状态: 停止旋转")
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else:
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self.taskMgr.add(self.rotateSceneTask, "rotate-scene")
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self.rotating = True
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self.rotateButton['text'] = "停止旋转"
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self.statusText.setText("状态: 正在旋转")
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print(f"旋转状态: {'开启' if self.rotating else '关闭'}")
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def rotateSceneTask(self, task):
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"""旋转场景的任务"""
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for cube in self.cubes:
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cube.setH(cube.getH() + 50 * globalClock.getDt())
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# 旋转3D文本
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self.textNodePath.setH(self.textNodePath.getH() + 30 * globalClock.getDt())
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self.virtualScreen.setH(self.virtualScreen.getH() + 20 * globalClock.getDt())
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return task.cont
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def changeColors(self):
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"""改变场景颜色"""
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self.colorIndex = (self.colorIndex + 1) % 3
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colors = [
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[(1, 0.5, 0.5), (0.5, 1, 0.5), (0.5, 0.5, 1)], # 红绿蓝
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[(1, 1, 0.5), (1, 0.5, 1), (0.5, 1, 1)], # 黄洋红青
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[(0.8, 0.2, 0.8), (0.2, 0.8, 0.8), (0.8, 0.8, 0.2)] # 紫青黄
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]
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colorSet = colors[self.colorIndex]
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for i, cube in enumerate(self.cubes):
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color = colorSet[i % 3]
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cube.setColor(*color, 1)
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# 改变3D文本颜色
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textColors = [(1, 1, 0), (0, 1, 1), (1, 0, 1)]
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self.textNodePath.setColor(*textColors[self.colorIndex], 1)
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self.statusText.setText(f"状态: 颜色方案 {self.colorIndex + 1}")
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print(f"切换到颜色方案 {self.colorIndex + 1}")
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def resetScene(self):
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"""重置场景"""
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# 停止旋转
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if self.rotating:
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self.toggleRotation()
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# 重置立方体位置和颜色
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for i, cube in enumerate(self.cubes):
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row = i // 3
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col = i % 3
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cube.setPos(-2 + col*2, 2 + row*2, 0.5)
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cube.setHpr(0, 0, 0)
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cube.setColor(0.2 + col*0.3, 0.2 + row*0.3, 0.5, 1)
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# 重置3D文本
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self.textNodePath.setHpr(0, 0, 0)
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self.textNodePath.setColor(1, 1, 0, 1)
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self.virtualScreen.setHpr(0, 0, 0)
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self.colorIndex = 0
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self.statusText.setText("状态: 场景已重置")
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print("场景已重置")
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def exitDemo(self):
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"""退出演示"""
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print("退出3D GUI演示")
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self.userExit()
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if __name__ == "__main__":
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print("启动PANDA3D 3D GUI演示...")
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demo = GUI3DDemo()
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demo.run() |