Sources_For_Win/ParaView/Lib/site-packages/pythonwin/pywin/Demos/openGLDemo.py

# Ported from the win32 and MFC OpenGL Samples.

from pywin.mfc import docview
import sys
try:
	from OpenGL.GL import *
	from OpenGL.GLU import *
except ImportError:
	print("The OpenGL extensions do not appear to be installed.")
	print("This Pythonwin demo can not run")
	sys.exit(1)

import win32con
import win32ui
import win32api
import timer

PFD_TYPE_RGBA =       0
PFD_TYPE_COLORINDEX = 1
PFD_MAIN_PLANE =      0
PFD_OVERLAY_PLANE =   1
PFD_UNDERLAY_PLANE =  (-1)
PFD_DOUBLEBUFFER =           0x00000001
PFD_STEREO =                 0x00000002
PFD_DRAW_TO_WINDOW =         0x00000004
PFD_DRAW_TO_BITMAP =         0x00000008
PFD_SUPPORT_GDI =            0x00000010
PFD_SUPPORT_OPENGL =         0x00000020
PFD_GENERIC_FORMAT =         0x00000040
PFD_NEED_PALETTE =           0x00000080
PFD_NEED_SYSTEM_PALETTE =    0x00000100
PFD_SWAP_EXCHANGE =          0x00000200
PFD_SWAP_COPY =              0x00000400
PFD_SWAP_LAYER_BUFFERS =     0x00000800
PFD_GENERIC_ACCELERATED =    0x00001000
PFD_DEPTH_DONTCARE =         0x20000000
PFD_DOUBLEBUFFER_DONTCARE =  0x40000000
PFD_STEREO_DONTCARE =        0x80000000


#threeto8 = [0, 0o111>>1, 0o222>>1, 0o333>>1, 0o444>>1, 0o555>>1, 0o666>>1, 0o377]
threeto8 = [0, 73>>1, 146>>1, 219>>1, 292>>1, 365>>1, 438>>1, 255]
twoto8 = [0, 0x55, 0xaa, 0xff]
oneto8 = [0, 255]

def ComponentFromIndex(i, nbits, shift):
	# val = (unsigned char) (i >> shift);
	val = (i >> shift) & 0xF;
	if nbits==1:
		val = val & 0x1
		return oneto8[val]
	elif nbits==2:
		val = val & 0x3
		return twoto8[val]
	elif nbits==3:
		val = val & 0x7
		return threeto8[val]
	else:
		return 0;

OpenGLViewParent=docview.ScrollView
class OpenGLView(OpenGLViewParent):
	def PreCreateWindow(self, cc):
		self.HookMessage (self.OnSize, win32con.WM_SIZE)
		# An OpenGL window must be created with the following flags and must not
		# include CS_PARENTDC for the class style. Refer to SetPixelFormat
		# documentation in the "Comments" section for further information.
		style = cc[5]
		style = style | win32con.WS_CLIPSIBLINGS | win32con.WS_CLIPCHILDREN
		cc = cc[0], cc[1], cc[2], cc[3], cc[4], style, cc[6], cc[7], cc[8]
		cc = self._obj_.PreCreateWindow(cc)
		return cc

	def OnSize (self, params):
		lParam = params[3]
		cx = win32api.LOWORD(lParam)
		cy = win32api.HIWORD(lParam)
		glViewport(0, 0, cx, cy)

		if self.oldrect[2] > cx or self.oldrect[3] > cy:
			self.RedrawWindow()
			
		self.OnSizeChange(cx, cy)

		self.oldrect = self.oldrect[0], self.oldrect[1], cx, cy
		
	def OnInitialUpdate(self):
		self.SetScaleToFitSize((100,100)) # or SetScrollSizes() - A Pythonwin requirement
		return self._obj_.OnInitialUpdate()
#		return rc

	def OnCreate(self, cs):
		self.oldrect = self.GetClientRect()
		self._InitContexts()
		self.Init()
			
	def OnDestroy(self, msg):
		self.Term()
		self._DestroyContexts()
		return OpenGLViewParent.OnDestroy(self, msg)


	def OnDraw(self, dc):
		self.DrawScene()
	
	def OnEraseBkgnd(self, dc):
		return 1

	# The OpenGL helpers
	def _SetupPixelFormat(self):
		dc = self.dc.GetSafeHdc()
		pfd = CreatePIXELFORMATDESCRIPTOR()
		pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER
		pfd.iPixelType = PFD_TYPE_RGBA
		pfd.cColorBits = 24
		pfd.cDepthBits = 32
		pfd.iLayerType = PFD_MAIN_PLANE
		pixelformat = ChoosePixelFormat(dc, pfd)
		SetPixelFormat(dc, pixelformat, pfd)
		self._CreateRGBPalette()
		
	def _CreateRGBPalette(self):
		dc = self.dc.GetSafeHdc()
		n = GetPixelFormat(dc)
		pfd = DescribePixelFormat(dc, n)
		if pfd.dwFlags & PFD_NEED_PALETTE:
			n = 1 << pfd.cColorBits
			pal = []
			for i in range(n):
				this = ComponentFromIndex(i, pfd.cRedBits, pfd.cRedShift), \
				      ComponentFromIndex(i, pfd.cGreenBits, pfd.cGreenShift), \
				      ComponentFromIndex(i, pfd.cBlueBits, pfd.cBlueShift), \
				      0
				pal.append(this)
			hpal = win32ui.CreatePalette(pal)
			self.dc.SelectPalette(hpal, 0)
			self.dc.RealizePalette()
			
	def _InitContexts(self):
		self.dc = self.GetDC()
		self._SetupPixelFormat()
		hrc = wglCreateContext(self.dc.GetSafeHdc())
		wglMakeCurrent(self.dc.GetSafeHdc(), hrc)

	def _DestroyContexts(self):
		hrc = wglGetCurrentContext()
		wglMakeCurrent(0, 0)
		if hrc: wglDeleteContext(hrc)

	# The methods to support OpenGL
	def DrawScene(self):
		assert 0, "You must override this method"
		
	def Init(self):
		assert 0, "You must override this method"
		
	def OnSizeChange(self, cx, cy):
		pass

	def Term(self):
		pass


class TestView(OpenGLView):

	def OnSizeChange(self, right, bottom):
		glClearColor( 0.0, 0.0, 0.0, 1.0 );
		glClearDepth( 1.0 );
		glEnable(GL_DEPTH_TEST)

		glMatrixMode( GL_PROJECTION )
		if bottom:
			aspect = right / bottom
		else:
			aspect = 0 # When window created!
		glLoadIdentity()
		gluPerspective( 45.0, aspect, 3.0, 7.0 )
		glMatrixMode( GL_MODELVIEW )
		
		near_plane = 3.0;
		far_plane = 7.0;
		maxObjectSize = 3.0;
		self.radius = near_plane + maxObjectSize/2.0;


	def Init(self):
		pass

	def DrawScene(self):
		glClearColor(0.0, 0.0, 0.0, 1.0)
		glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT )

		glPushMatrix()
		glTranslatef(0.0, 0.0, -self.radius);

		self._DrawCone()

		self._DrawPyramid()

		glPopMatrix()
		glFinish()

		SwapBuffers( wglGetCurrentDC() )

	def _DrawCone(self):
		glColor3f(0.0, 1.0, 0.0)

		glPushMatrix()
		glTranslatef(-1.0, 0.0, 0.0);
		quadObj = gluNewQuadric();
		gluQuadricDrawStyle(quadObj, GLU_FILL);
		gluQuadricNormals(quadObj, GLU_SMOOTH);
		gluCylinder(quadObj, 1.0, 0.0, 1.0, 20, 10);
#		gluDeleteQuadric(quadObj);
		glPopMatrix();

	def _DrawPyramid(self):
		glPushMatrix()
		glTranslatef(1.0, 0.0, 0.0)
		glBegin(GL_TRIANGLE_FAN)
		glColor3f(1.0, 0.0, 0.0)
		glVertex3f(0.0, 1.0, 0.0)
		glColor3f(0.0, 1.0, 0.0)
		glVertex3f(-1.0, 0.0, 0.0)
		glColor3f(0.0, 0.0, 1.0)
		glVertex3f(0.0, 0.0, 1.0)
		glColor3f(0.0, 1.0, 0.0)
		glVertex3f(1.0, 0.0, 0.0)
		glEnd()
		glPopMatrix()

class CubeView(OpenGLView):
	def OnSizeChange(self, right, bottom):
		glClearColor( 0.0, 0.0, 0.0, 1.0 );
		glClearDepth( 1.0 );
		glEnable(GL_DEPTH_TEST)

		glMatrixMode( GL_PROJECTION )
		if bottom:
			aspect = right / bottom
		else:
			aspect = 0 # When window created!
		glLoadIdentity()
		gluPerspective( 45.0, aspect, 3.0, 7.0 )
		glMatrixMode( GL_MODELVIEW )
		
		near_plane = 3.0;
		far_plane = 7.0;
		maxObjectSize = 3.0;
		self.radius = near_plane + maxObjectSize/2.0;

	def Init(self):
		self.busy = 0
		self.wAngleY = 10.0
		self.wAngleX = 1.0
		self.wAngleZ = 5.0
		self.timerid = timer.set_timer (150, self.OnTimer)
		
	def OnTimer(self, id, timeVal):
		self.DrawScene()
	
	def Term(self):
		timer.kill_timer(self.timerid)

	def DrawScene(self):
		if self.busy: return
		self.busy = 1

		glClearColor(0.0, 0.0, 0.0, 1.0);
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		
		glPushMatrix();
		
		glTranslatef(0.0, 0.0, -self.radius);
		glRotatef(self.wAngleX, 1.0, 0.0, 0.0);
		glRotatef(self.wAngleY, 0.0, 1.0, 0.0);
		glRotatef(self.wAngleZ, 0.0, 0.0, 1.0);
		
		self.wAngleX = self.wAngleX + 1.0
		self.wAngleY = self.wAngleY + 10.0
		self.wAngleZ = self.wAngleZ + 5.0;
		
		
		glBegin(GL_QUAD_STRIP);
		glColor3f(1.0, 0.0, 1.0);
		glVertex3f(-0.5, 0.5, 0.5);
		
		glColor3f(1.0, 0.0, 0.0);
		glVertex3f(-0.5, -0.5, 0.5);
		
		glColor3f(1.0, 1.0, 1.0);
		glVertex3f(0.5, 0.5, 0.5);
		
		glColor3f(1.0, 1.0, 0.0);
		glVertex3f(0.5, -0.5, 0.5);
		
		glColor3f(0.0, 1.0, 1.0);
		glVertex3f(0.5, 0.5, -0.5);
		
		glColor3f(0.0, 1.0, 0.0);
		glVertex3f(0.5, -0.5, -0.5);
		
		glColor3f(0.0, 0.0, 1.0);
		glVertex3f(-0.5, 0.5, -0.5);
		
		glColor3f(0.0, 0.0, 0.0);
		glVertex3f(-0.5, -0.5,  -0.5);
		
		glColor3f(1.0, 0.0, 1.0);
		glVertex3f(-0.5, 0.5, 0.5);
		
		glColor3f(1.0, 0.0, 0.0);
		glVertex3f(-0.5, -0.5, 0.5);
		
		glEnd();
		
		glBegin(GL_QUADS);
		glColor3f(1.0, 0.0, 1.0);
		glVertex3f(-0.5, 0.5, 0.5);
		
		glColor3f(1.0, 1.0, 1.0);
		glVertex3f(0.5, 0.5, 0.5);
		
		glColor3f(0.0, 1.0, 1.0);
		glVertex3f(0.5, 0.5, -0.5);
		
		glColor3f(0.0, 0.0, 1.0);
		glVertex3f(-0.5, 0.5, -0.5);
		glEnd();
		
		glBegin(GL_QUADS);
		glColor3f(1.0, 0.0, 0.0);
		glVertex3f(-0.5, -0.5, 0.5);
		
		glColor3f(1.0, 1.0, 0.0);
		glVertex3f(0.5, -0.5, 0.5);
		
		glColor3f(0.0, 1.0, 0.0);
		glVertex3f(0.5, -0.5, -0.5);
		
		glColor3f(0.0, 0.0, 0.0);
		glVertex3f(-0.5, -0.5,  -0.5);
		glEnd();
		
		glPopMatrix();
		
		glFinish();
		SwapBuffers(wglGetCurrentDC());
		
		self.busy = 0

def test():
	template = docview.DocTemplate(None, None, None, CubeView )
#	template = docview.DocTemplate(None, None, None, TestView )
	template.OpenDocumentFile(None)
	
if __name__=='__main__':
	test()