examples/opengl/rokuro.py

   1 #!/usr/bin/python\r
   2 # coding: utf-8\r
   3 \r
   4 import math\r
   5 from OpenGL.GL import *\r
   6 from OpenGL.GLU import *\r
   7 \r
   8 from . import baseview\r
   9 \r
  10 class RokuroView(baseview.BaseView):\r
  11     def __init__(self):\r
  12         super(RokuroView, self).__init__()\r
  13         self.w=1\r
  14         self.h=1\r
  15         self.head=0\r
  16         self.pitch=0\r
  17         self.SHIFT_FACTOR=0.001\r
  18         self.distance=100\r
  19         self.shiftX=0\r
  20         self.shiftY=0\r
  21         self.aspect=1\r
  22         self.n=1\r
  23         self.f=10000\r
  24 \r
  25     def __str__(self):\r
  26         return '<RokuroView shiftX: %f, shiftY: %f, distance: %f>' % (\r
  27                 self.shiftX, self.shiftY, self.distance)\r
  28  \r
  29     def onResize(self, w=None, h=None):\r
  30         super(RokuroView, self).onResize(w, h)\r
  31         self.aspect=float(self.w)/float(self.h)\r
  32 \r
  33     def dolly(self, d):\r
  34         if d>0:\r
  35             self.distance*=1.1\r
  36         elif d<0:\r
  37             self.distance*=0.9\r
  38 \r
  39     def shift(self, dx, dy):\r
  40         self.shiftX+=dx * self.distance * self.SHIFT_FACTOR\r
  41         self.shiftY+=dy * self.distance * self.SHIFT_FACTOR\r
  42 \r
  43     def rotate(self, head, pitch):\r
  44         self.head+=head\r
  45         self.pitch+=pitch\r
  46 \r
  47     def updateProjection(self):\r
  48         gluPerspective(30, self.aspect, self.n, self.f)\r
  49 \r
  50     def updateView(self):\r
  51         glTranslate(self.shiftX, self.shiftY, -self.distance)\r
  52         glRotate(self.head, 0, 1, 0)\r
  53         glRotate(self.pitch, 1, 0, 0)\r
  54 \r
  55     def onMotion(self, x, y):\r
  56         redraw=False\r
  57         if self.isLeftDown:\r
  58             self.dolly(y-self.y)\r
  59             redraw=True\r
  60         if self.isMiddelDown:\r
  61             self.shift(x-self.x, self.y-y)\r
  62             redraw=True\r
  63         if self.isRightDown:\r
  64             self.rotate(x-self.x, y-self.y)\r
  65             redraw=True\r
  66         self.x=x\r
  67         self.y=y\r
  68         return redraw\r
  69 \r
  70     def onWheel(self, d):\r
  71         if d!=0:\r
  72             self.dolly(d)\r
  73             return True\r
  74 \r
  75     def look_bb(self, min_v, max_v):\r
  76         w=max_v[0]-min_v[0]\r
  77         h=max_v[1]-min_v[1]\r
  78         long_side=max(w, h)\r
  79         def deglee_to_radian(deglee):\r
  80             return math.pi*deglee/180.0\r
  81         d=long_side/math.tan(deglee_to_radian(30)) * 1.5\r
  82         self.distance=min_v[2]+d\r
  83         cx=min_v[0]+max_v[0]\r
  84         cy=min_v[1]+max_v[1]\r
  85         self.shiftX=-cx/2.0\r
  86         self.shiftY=-cy/2.0\r
  87         print(self)\r
  88 \r