1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
import sys
import wx
import wx.glcanvas as glcanvas
try:
from OpenGL.GL import *
from OpenGL.GLUT import *
haveOpenGL = True
except ImportError:
haveOpenGL = False
#----------------------------------------------------------------------
class MyCanvasBase(glcanvas.GLCanvas):
def __init__(self, parent):
glcanvas.GLCanvas.__init__(self, parent, -1)
self.init = False
self.context = glcanvas.GLContext(self)
self.lastx = self.x = 30
self.lasty = self.y = 30
self.size = None
self.SetBackgroundStyle(wx.BG_STYLE_PAINT)
self.Bind(wx.EVT_SIZE, self.OnSize)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_LEFT_DOWN, self.OnMouseDown)
self.Bind(wx.EVT_LEFT_UP, self.OnMouseUp)
self.Bind(wx.EVT_MOTION, self.OnMouseMotion)
def OnSize(self, event):
wx.CallAfter(self.DoSetViewport)
event.Skip()
def DoSetViewport(self):
size = self.size = self.GetClientSize()
self.SetCurrent(self.context)
glViewport(0, 0, size.width, size.height)
def OnPaint(self, event):
dc = wx.PaintDC(self)
self.SetCurrent(self.context)
if not self.init:
self.InitGL()
self.init = True
self.OnDraw()
def OnMouseDown(self, evt):
self.CaptureMouse()
self.x, self.y = self.lastx, self.lasty = evt.GetPosition()
def OnMouseUp(self, evt):
self.ReleaseMouse()
def OnMouseMotion(self, evt):
if evt.Dragging() and evt.LeftIsDown():
self.lastx, self.lasty = self.x, self.y
self.x, self.y = evt.GetPosition()
self.Refresh(False)
class CubeCanvas(MyCanvasBase):
def InitGL(self):
# set viewing projection
glMatrixMode(GL_PROJECTION)
glFrustum(-0.5, 0.5, -0.5, 0.5, 1.0, 3.0)
# position viewer
glMatrixMode(GL_MODELVIEW)
glTranslatef(0.0, 0.0, -2.0)
# position object
glRotatef(self.y, 1.0, 0.0, 0.0)
glRotatef(self.x, 0.0, 1.0, 0.0)
glEnable(GL_DEPTH_TEST)
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
def OnDraw(self):
# clear color and depth buffers
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
# draw six faces of a cube
glBegin(GL_QUADS)
glNormal3f( 0.0, 0.0, 1.0)
glVertex3f( 0.5, 0.5, 0.5)
glVertex3f(-0.5, 0.5, 0.5)
glVertex3f(-0.5,-0.5, 0.5)
glVertex3f( 0.5,-0.5, 0.5)
glNormal3f( 0.0, 0.0,-1.0)
glVertex3f(-0.5,-0.5,-0.5)
glVertex3f(-0.5, 0.5,-0.5)
glVertex3f( 0.5, 0.5,-0.5)
glVertex3f( 0.5,-0.5,-0.5)
glNormal3f( 0.0, 1.0, 0.0)
glVertex3f( 0.5, 0.5, 0.5)
glVertex3f( 0.5, 0.5,-0.5)
glVertex3f(-0.5, 0.5,-0.5)
glVertex3f(-0.5, 0.5, 0.5)
glNormal3f( 0.0,-1.0, 0.0)
glVertex3f(-0.5,-0.5,-0.5)
glVertex3f( 0.5,-0.5,-0.5)
glVertex3f( 0.5,-0.5, 0.5)
glVertex3f(-0.5,-0.5, 0.5)
glNormal3f( 1.0, 0.0, 0.0)
glVertex3f( 0.5, 0.5, 0.5)
glVertex3f( 0.5,-0.5, 0.5)
glVertex3f( 0.5,-0.5,-0.5)
glVertex3f( 0.5, 0.5,-0.5)
glNormal3f(-1.0, 0.0, 0.0)
glVertex3f(-0.5,-0.5,-0.5)
glVertex3f(-0.5,-0.5, 0.5)
glVertex3f(-0.5, 0.5, 0.5)
glVertex3f(-0.5, 0.5,-0.5)
glEnd()
if self.size is None:
self.size = self.GetClientSize()
w, h = self.size
w = max(w, 1.0)
h = max(h, 1.0)
xScale = 180.0 / w
yScale = 180.0 / h
glRotatef((self.y - self.lasty) * yScale, 1.0, 0.0, 0.0);
glRotatef((self.x - self.lastx) * xScale, 0.0, 1.0, 0.0);
self.SwapBuffers()
#----------------------------------------------------------------------
if __name__ == '__main__':
app = wx.App(False)
if not haveOpenGL:
wx.MessageBox('This sample requires the PyOpenGL package.', 'Sorry')
else:
frm = wx.Frame(None, title='GLCanvas Sample')
canvas = CubeCanvas(frm)
frm.Show()
app.MainLoop()
#----------------------------------------------------------------------
|
