def drawFocus(self):
glColor4f(0, 0, 0, 0.4)
glPushMatrix()
glLoadIdentity()
glMatrixMode(GL_PROJECTION)
glPushMatrix()
glLoadIdentity()
gluOrtho2D(0, self.width, 0, self.height)
glLineStipple(1, 0xf0f0)
glEnable(GL_LINE_STIPPLE)
glBegin(GL_LINE_LOOP)
glVertex2f(1, 0)
glVertex2f(self.width, 0)
glVertex2f(self.width, self.height - 1)
glVertex2f(1, self.height - 1)
glEnd()
glDisable(GL_LINE_STIPPLE)
glPopMatrix() # restore PROJECTION
glMatrixMode(GL_MODELVIEW)
glPopMatrix()
def set_screen(self):
'''
Set ortho projection, showing world space coords 0 <= x < WIDTH,
and 0 <= y < HEIGHT.
'''
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
glu.gluOrtho2D(0, self.width - 1, 0, self.height - 1)
def on_resize(self, width, height):
# scale is distance from screen centre to top or bottom, in world coords
scale = 110
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
aspect = width / height
gluOrtho2D(-scale * aspect, +scale * aspect, -scale, +scale)
return EVENT_HANDLED
def on_resize(self, width, height):
# scale is distance from screen centre to top or bottom, in world coords
scale = 110
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
aspect = width / height
gluOrtho2D(
-scale * aspect,
+scale * aspect,
-scale,
+scale)
return EVENT_HANDLED
def set_ortho(self, zoom):
'''
Screen's shortest dimension (usually height) will show exactly
self.zoom of the world from the center of the screen to each edge,
regardless of screen resolution, window size.
'''
def ortho_bounds(self, zoom, aspect):
left = bottom = -zoom
right = top = zoom
if self.width > self.height:
# landscape mode window
bottom /= aspect
top /= aspect
elif self.width < self.height:
# portrait mode window
left *= aspect
right *= aspect
return left, right, bottom, top
aspect = self.width / self.height
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
glu.gluOrtho2D(*ortho_bounds(zoom, aspect))
