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from Blender import Draw
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instructions = "Hold mouse buttons to change the background color."
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title = "Testing BGL + Draw"
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instructions = "Use mouse buttons or wheel to change the background color."
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quitting = " Press ESC or q to quit."
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len1 = Draw.GetStringWidth(title)
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len2 = Draw.GetStringWidth(instructions + quitting)
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glClearColor(R,G,B,A) # define color used to clear buffers
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glClear(GL_COLOR_BUFFER_BIT) # use it to clear the color buffer
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glColor3f(1,1,1) # change default color
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glColor3f(0.35,0.18,0.92) # define default color
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glBegin(GL_POLYGON) # begin a vertex data list
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glColor3f(0.4,0.4,0.4) # change default color
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glRecti(40, 96, 60+len1, 113)
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glRasterPos2i(50,100) # move cursor to x = 50, y = 100
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Draw.Text("Testing BGL + Draw") # draw this text there
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glRasterPos2i(350,20) # move cursor again
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Draw.Text(title) # draw this text there
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glRasterPos2i(350,40) # move cursor again
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Draw.Text(instructions + quitting) # draw another msg
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glBegin(GL_LINE_LOOP) # begin a vertex-data list
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glVertex2i(120,115)
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glEnd() # close this list
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glColor3f(0.35,0.18,0.92) # change default color again
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glBegin(GL_POLYGON) # another list, for a polygon
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Draw.Redraw(1) # make changes visible.
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def ev(evt, val): # this is a callback for Draw.Register()
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def ev(evt, val): # event callback for Draw.Register()
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global R,G,B,A # ... it handles input events
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if evt == Draw.ESCKEY or evt == Draw.QKEY:
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Draw.Exit() # this quits the script
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elif evt == Draw.LEFTMOUSE: R = 1 - R
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elif evt == Draw.MIDDLEMOUSE: G = 1 - G
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elif evt == Draw.RIGHTMOUSE: B = 1 - B
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elif evt == Draw.WHEELUPMOUSE:
68
elif evt == Draw.WHEELDOWNMOUSE:
59
Draw.Register(show_win, ev, None)
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return # don't redraw if nothing changed
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Draw.Redraw(1) # make changes visible.
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Draw.Register(show_win, ev, None) # start the main loop
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Draw.Register(show_win, ev, None) # start the main loop
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@note: you can use the L{Image} module and L{Image.Image} bpy object to load
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and set textures. See L{Image.Image.glLoad} and L{Image.Image.glFree},
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80
@see: U{www.opengl.org}
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@see: U{nehe.gamedev.net}
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84
def glAccum(op, value):
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86
Operate on the accumulation buffer
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@see: U{http://www.opengl.org/developers/documentation/man_pages/hardcopy/GL/html/gl/accum.html}
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@see: U{www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/accum.html}
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@type op: Enumerated constant
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@param op: The accumulation buffer operation.
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is first attached to a window, width and height are set to the dimensions of that window.
1611
def gluPerspective(fovY, aspect, zNear, zFar):
1613
Set up a perspective projection matrix.
1614
@see: U{http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/ch06.html#id5577288}
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@param fovY: Specifies the field of view angle, in degrees, in the y direction.
1618
@type aspect: double
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@param aspect: Specifies the aspect ratio that determines the field of view in the x direction.
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The aspect ratio is the ratio of x (width) to y (height).
1622
@param zNear: Specifies the distance from the viewer to the near clipping plane (always positive).
1624
@param zFar: Specifies the distance from the viewer to the far clipping plane (always positive).
1627
def gluLookAt(eyex, eyey, eyez, centerx, centery, centerz, upx, upy, upz):
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Define a viewing transformation
1630
@see: U{http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/ch06.html#id5573042}
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@type eyex, eyey, eyez: double
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@param eyex, eyey, eyez: Specifies the position of the eye point.
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@type centerx, centery, centerz: double
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@param centerx, centery, centerz: Specifies the position of the reference point.
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@type upx, upy, upz: double
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@param upx, upy, upz: Specifies the direction of the up vector.
1640
def gluOrtho2D(left, right, bottom, top):
1642
Define a 2-D orthographic projection matrix
1643
@see: U{http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/ch06.html#id5578074}
1645
@type left, right: double
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@param left, right: Specify the coordinates for the left and right vertical clipping planes.
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@type bottom, top: double
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@param bottom, top: Specify the coordinates for the bottom and top horizontal clipping planes.
1651
def gluPickMatrix(x, y, width, height, viewport):
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Define a picking region
1654
@see: U{http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/ch06.html#id5578074}
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@param x, y: Specify the center of a picking region in window coordinates.
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@type width, height: double
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@param width, height: Specify the width and height, respectively, of the picking region in window coordinates.
1660
@type viewport: Buffer object. [int]
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@param viewport: Specifies the current viewport.
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def gluProject(objx, objy, objz, modelMatrix, projMatrix, viewport, winx, winy, winz):
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Map object coordinates to window coordinates.
1667
@see: U{http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/ch06.html#id5578074}
1669
@type objx, objy, objz: double
1670
@param objx, objy, objz: Specify the object coordinates.
1671
@type modelMatrix: Buffer object. [double]
1672
@param modelMatrix: Specifies the current modelview matrix (as from a glGetDoublev call).
1673
@type projMatrix: Buffer object. [double]
1674
@param projMatrix: Specifies the current projection matrix (as from a glGetDoublev call).
1675
@type viewport: Buffer object. [int]
1676
@param viewport: Specifies the current viewport (as from a glGetIntegerv call).
1677
@type winx, winy, winz: Buffer object. [double]
1678
@param winx, winy, winz: Return the computed window coordinates.
1681
def gluUnProject(winx, winy, winz, modelMatrix, projMatrix, viewport, objx, objy, objz):
1683
Map object coordinates to window
1685
@see: U{http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/ch06.html#id5582204}
1687
@type winx, winy, winz: double
1688
@param winx, winy, winz: Specify the window coordinates to be mapped.
1689
@type modelMatrix: Buffer object. [double]
1690
@param modelMatrix: Specifies the current modelview matrix (as from a glGetDoublev call).
1691
@type projMatrix: Buffer object. [double]
1692
@param projMatrix: Specifies the current projection matrix (as from a glGetDoublev call).
1693
@type viewport: Buffer object. [int]
1694
@param viewport: Specifies the current viewport (as from a glGetIntegerv call).
1695
@type objx, objy, objz: Buffer object. [double]
1696
@param objx, objy, objz: Return the computed object coordinates.
1597
The Buffer object is simply a block of memory that is delineated and initalized by the
1701
The Buffer object is simply a block of memory that is delineated and initialized by the
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user. Many OpenGL funtions return data to a C-style pointer, however, because this
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is not possible in python the Buffer object can be used to this end. Wherever pointer
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notation is used in the OpenGL functions the Buffer object can be used in it's BGL
added
removed
source/blender/python/api2_2x/doc/BGL.py
