def __init__(self,viewport_with=800):
gl.glMatrixMode(gl.GL_MODELVIEW) # Set OpenGL matrix state to modify the modelview matrix
gl.glPushMatrix()
gl.glLoadIdentity() # Clear the modelview matrix
gl.glTranslate(viewport_with,0,0)
gl.glRotate(180, 0, 1, 0)
matrix = gl.glGetFloatv(gl.GL_MODELVIEW_MATRIX)
gl.glPopMatrix()
if matrix is None:
# OpenGL wasn't started
raise RuntimeError("OpenGL matrix operations can only take place once OpenGL context started.")
matrix = np.asarray(matrix) # make sure it's numpy array
VisionEgg.Core.ModelView.__init__(self,**{'matrix':matrix})
def draw(self):
# XXX This method is not speed-optimized. I just wrote it to
# get the job done. (Nonetheless, it seems faster than the C
# version commented out above.)
p = self.parameters # shorthand
now_sec = VisionEgg.time_func()
if self.start_times_sec is not None:
# compute extinct dots and generate new positions
replace_indices = Numeric.nonzero( Numeric.greater( now_sec - self.start_times_sec, p.dot_lifespan_sec) )
Numeric.put( self.start_times_sec, replace_indices, now_sec )
new_centers = np.random.standard_normal((3,len(replace_indices)))
for i in range(3):
Numeric.put( self.centers[i,:], replace_indices, new_centers[i,:] )
else:
# initialize dot extinction values to random (uniform) distribution
self.start_times_sec = RandomArray.uniform( now_sec - p.dot_lifespan_sec, now_sec,
(self.constant_parameters.num_dots,))
time_delta_sec = now_sec - self.last_time_sec
self.last_time_sec = now_sec # reset for next loop
self.centers = self.centers + np.array(p.signal_vec)[:,np.newaxis]*time_delta_sec
xyz = self.centers*p.start_position_variance + np.array(p.start_position_mean)[:,np.newaxis]
xs = xyz[0,:]
ys = xyz[1,:]
zs = xyz[2,:]
if p.on:
gl.glEnable( gl.GL_POINT_SMOOTH )
# allow max_alpha value to control blending
gl.glEnable( gl.GL_BLEND )
gl.glBlendFunc( gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA )
gl.glPointSize(p.dot_size)
# Clear the modeview matrix
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glDisable(gl.GL_TEXTURE_2D)
draw_dots(xs,ys,zs,self.colors)
gl.glDisable( gl.GL_POINT_SMOOTH ) # turn off
gl.glPopMatrix()
def __init__(self, viewport_with=800):
gl.glMatrixMode(
gl.GL_MODELVIEW
) # Set OpenGL matrix state to modify the modelview matrix
gl.glPushMatrix()
gl.glLoadIdentity() # Clear the modelview matrix
gl.glTranslate(viewport_with, 0, 0)
gl.glRotate(180, 0, 1, 0)
matrix = gl.glGetFloatv(gl.GL_MODELVIEW_MATRIX)
gl.glPopMatrix()
if matrix is None:
# OpenGL wasn't started
raise RuntimeError(
"OpenGL matrix operations can only take place once OpenGL context started."
)
matrix = np.asarray(matrix) # make sure it's numpy array
VisionEgg.Core.ModelView.__init__(self, **{'matrix': matrix})
def draw(self):
if self.parameters.on:
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glDisable(gl.GL_BLEND)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(self.parameters.lowerleft[0],self.parameters.lowerleft[1],0.0)
c = self.parameters.color
if len(c)==3:
gl.glColor3f(*c)
elif len(c)==4:
gl.glColor4f(*c)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glRasterPos3f(0.0,0.0,0.0)
for char in self.parameters.text:
glut.glutBitmapCharacter(self.parameters.font,ord(char))
gl.glPopMatrix()
def draw(self):
if self.parameters.on:
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(self.parameters.lowerleft[0],
self.parameters.lowerleft[1], 0.0)
gl.glRotate(self.parameters.orientation, 0.0, 0.0, 1.0)
c = self.parameters.color
if len(c) == 3:
gl.glColor3f(*c)
elif len(c) == 4:
gl.glColor4f(*c)
gl.glLineWidth(self.parameters.linewidth)
if self.parameters.anti_aliasing:
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_LINE_SMOOTH)
else:
gl.glDisable(gl.GL_BLEND)
## # This code successfully draws a box...
## gl.glBegin(gl.GL_QUADS)
## gl.glVertex2f(0.0,0.0)
## gl.glVertex2f(0.0,0.1)
## gl.glVertex2f(0.1,0.1)
## gl.glVertex2f(0.1,0.0)
## gl.glEnd()
# But this code does not draw the string!?!
for char in self.parameters.text:
glut.glutStrokeCharacter(self.parameters.font, ord(char))
gl.glPopMatrix()
def draw(self):
if self.parameters.on:
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glDisable(gl.GL_BLEND)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(self.parameters.lowerleft[0],
self.parameters.lowerleft[1], 0.0)
c = self.parameters.color
if len(c) == 3:
gl.glColor3f(*c)
elif len(c) == 4:
gl.glColor4f(*c)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glRasterPos3f(0.0, 0.0, 0.0)
for char in self.parameters.text:
glut.glutBitmapCharacter(self.parameters.font, ord(char))
gl.glPopMatrix()
def draw(self):
if self.parameters.on:
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(self.parameters.lowerleft[0],self.parameters.lowerleft[1],0.0)
gl.glRotate(self.parameters.orientation,0.0,0.0,1.0)
c = self.parameters.color
if len(c)==3:
gl.glColor3f(*c)
elif len(c)==4:
gl.glColor4f(*c)
gl.glLineWidth(self.parameters.linewidth)
if self.parameters.anti_aliasing:
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_LINE_SMOOTH)
else:
gl.glDisable(gl.GL_BLEND)
## # This code successfully draws a box...
## gl.glBegin(gl.GL_QUADS)
## gl.glVertex2f(0.0,0.0)
## gl.glVertex2f(0.0,0.1)
## gl.glVertex2f(0.1,0.1)
## gl.glVertex2f(0.1,0.0)
## gl.glEnd()
# But this code does not draw the string!?!
for char in self.parameters.text:
glut.glutStrokeCharacter(self.parameters.font,ord(char))
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
width = self.size[0]
height = self.size[1]
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glPushMatrix()
gl.glLoadIdentity()
gl.glOrtho(-width, width, -height, height, -200, 200)
gl.glScalef(2, -2, 2)
gl.glMatrixMode(gl.GL_MODELVIEW)
if len(p.color)==3:
gl.glColor3f(*p.color)
elif len(p.color)==4:
gl.glColor4f(*p.color)
# this is necessary for the antialiasing
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glEnable(gl.GL_LINE_SMOOTH)
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
gl.glLineWidth(p.line_width)
# draw the polygon
gl.glBegin(gl.GL_POLYGON)
for point in p.points:
gl.glVertex3f(point[0], point[1], 0.0)
gl.glVertex3f(p.points[0][0], p.points[0][1], 0.0)
gl.glEnd() # GL_LINE_STRIP
gl.glDisable(gl.GL_LINE_SMOOTH)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
if p.center is not None:
if not hasattr(VisionEgg.config,"_GAVE_CENTER_DEPRECATION"):
logger = logging.getLogger('VisionEgg.MoreStimuli')
logger.warning("Specifying Target2D by deprecated "
"'center' parameter deprecated. Use "
"'position' parameter instead. (Allows "
"use of 'anchor' parameter to set to "
"other values.)")
VisionEgg.config._GAVE_CENTER_DEPRECATION = 1
p.anchor = 'center'
p.position = p.center[0], p.center[1] # copy values (don't copy ref to tuple)
if p.on:
# calculate center
center = VisionEgg._get_center(p.position,p.anchor,p.size)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(center[0],center[1],0.0)
gl.glRotate(p.orientation,0.0,0.0,1.0)
if len(p.color)==3:
gl.glColor3f(*p.color)
elif len(p.color)==4:
gl.glColor4f(*p.color)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
w = p.size[0]/2.0
h = p.size[1]/2.0
gl.glBegin(gl.GL_QUADS)
gl.glVertex3f(-w,-h, 0.0)
gl.glVertex3f( w,-h, 0.0)
gl.glVertex3f( w, h, 0.0)
gl.glVertex3f(-w, h, 0.0)
gl.glEnd() # GL_QUADS
if p.anti_aliasing:
if not self._gave_alpha_warning:
if len(p.color) > 3 and p.color[3] != 1.0:
logger = logging.getLogger('VisionEgg.MoreStimuli')
logger.warning("The parameter anti_aliasing is "
"set to true in the Target2D "
"stimulus class, but the color "
"parameter specifies an alpha "
"value other than 1.0. To "
"acheive anti-aliasing, ensure "
"that the alpha value for the "
"color parameter is 1.0.")
self._gave_alpha_warning = 1
# We've already drawn a filled polygon (aliased), now
# redraw the outline of the polygon (with
# anti-aliasing). (Using GL_POLYGON_SMOOTH results in
# artifactual lines where triangles were joined to
# create quad, at least on some OpenGL
# implementations.)
# Calculate coverage value for each pixel of outline
# and store as alpha
gl.glEnable(gl.GL_LINE_SMOOTH)
# Now specify how to use the alpha value
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
# Draw a second polygon in line mode, so the edges are anti-aliased
gl.glPolygonMode(gl.GL_FRONT_AND_BACK,gl.GL_LINE)
gl.glBegin(gl.GL_QUADS)
gl.glVertex3f(-w,-h, 0.0);
gl.glVertex3f( w,-h, 0.0);
gl.glVertex3f( w, h, 0.0);
gl.glVertex3f(-w, h, 0.0);
gl.glEnd() # GL_QUADS
# Set the polygon mode back to fill mode
gl.glPolygonMode(gl.GL_FRONT_AND_BACK,gl.GL_FILL)
gl.glDisable(gl.GL_LINE_SMOOTH)
gl.glPopMatrix()
def draw(self):
p = self.parameters # Shorthand
if p.on:
# Calculate center
center = VisionEgg._get_center(p.position,p.anchor,p.size)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(center[0],center[1],0.0)
gl.glRotate(-p.orientation,0.0,0.0,1.0)
if len(p.color)==3:
gl.glColor3f(*p.color)
elif len(p.color)==4:
gl.glColor4f(*p.color)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
w = p.size[0]/2.0
h = p.size[1]/2.0
gl.glBegin(gl.GL_QUADS) # Draw Rectangle
gl.glVertex3f( 0.25*w, h, 0.0)
gl.glVertex3f(-w, h, 0.0)
gl.glVertex3f(-w,-h, 0.0)
gl.glVertex3f( 0.25*w, -h, 0.0)
gl.glEnd() # GL_QUADS
gl.glBegin(gl.GL_TRIANGLES) # Draw Triangle
gl.glVertex3f( 1.00*w, 0.0*h, 0.0) # Top
gl.glVertex3f( 0.25*w,-3.0*h, 0.0)
gl.glVertex3f( 0.25*w, 3.0*h, 0.0)
gl.glEnd() # GL_QUADS
if p.anti_aliasing:
if not self._gave_alpha_warning:
if len(p.color) > 3 and p.color[3] != 1.0:
logger = logging.getLogger('VisionEgg.Arrow')
logger.warning("The parameter anti_aliasing is "
"set to true in the Arrow "
"stimulus class, but the color "
"parameter specifies an alpha "
"value other than 1.0. To "
"acheive anti-aliasing, ensure "
"that the alpha value for the "
"color parameter is 1.0.")
self._gave_alpha_warning = 1
# We've already drawn a filled polygon (aliased), now redraw
# the outline of the polygon (with anti-aliasing). (Using
# GL_POLYGON_SMOOTH results in artifactual lines where
# triangles were joined to create quad, at least on some OpenGL
# implementations.)
# Calculate coverage value for each pixel of outline
# and store as alpha
gl.glEnable(gl.GL_LINE_SMOOTH)
# Now specify how to use the alpha value
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
# Draw a second polygon in line mode, so the edges are anti-aliased
gl.glPolygonMode(gl.GL_FRONT_AND_BACK,gl.GL_LINE)
gl.glBegin(gl.GL_QUADS)
gl.glVertex3f( 0.25*w, h, 0.0) # Draw Rectangle
gl.glVertex3f(-w, h, 0.0)
gl.glVertex3f(-w,-h, 0.0)
gl.glVertex3f( 0.25*w, -h, 0.0)
gl.glVertex3f( 1.00*w, 0.0*h, 0.0) # Draw Triangle
gl.glVertex3f( 0.25*w,-3.0*h, 0.0)
gl.glVertex3f( 0.25*w, 3.0*h, 0.0)
gl.glEnd() # GL_QUADS
# Set the polygon mode back to fill mode
gl.glPolygonMode(gl.GL_FRONT_AND_BACK,gl.GL_FILL)
gl.glDisable(gl.GL_LINE_SMOOTH)
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
if p.center is not None:
p.anchor = 'center'
p.position = p.center[0], p.center[1] # copy values (don't copy ref to tuple)
if p.on:
# calculate center
center = VisionEgg._get_center(p.position,p.anchor,p.size)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(center[0],center[1],0.0)
gl.glRotate(p.orientation,0.0,0.0,1.0)
if len(p.bgcolor)==3:
gl.glColor3f(*p.bgcolor)
elif len(p.bgcolor)==4:
gl.glColor4f(*p.bgcolor)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glBlendFunc(gl.GL_SRC_ALPHA,gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
w = p.size[0]/2.0 #grid half-size
h = p.size[1]/2.0
m = p.size[0]/p.grid[0] #cell size
n = p.size[1]/p.grid[1]
i = range(p.grid[0]) #grid index
j = range(p.grid[1])
#draw colorful cell
# vertices_list = [((-w+column*m, h-(row+1)*n, 0.0),(-w+column*m, h-row*n, 0.0),\
# (-w+(column+1)*m, h-row*n, 0.0),(-w+(column+1)*m, h-row*n, 0.0))\
# for column in j for row in i]
vertices_list = [((-w+column*m, h-(row+1)*n, 0.0),(-w+column*m, h-row*n, 0.0),\
(-w+(column+1)*m, h-row*n, 0.0),(-w+(column+1)*m, h-(row+1)*n, 0.0))\
for column in j for row in i]
colors_list = [colormap(p.colorindex[row,column],color=p.cellcolor)*4 for column in j for row in i]
#flattening the vertices and colors
vertices_flat = [num for tuple in vertices_list for vertex in tuple for num in vertex]
colors_flat = [num for tuple in colors_list for num in tuple]
vertices = np.array(vertices_flat)
colors = np.array(colors_flat)
vertices.shape = (-1, 3)
colors.shape = (-1, 3)
gl.glVertexPointerd(vertices)
gl.glColorPointerd(colors)
gl.glEnableClientState(gl.GL_VERTEX_ARRAY)
gl.glEnableClientState(gl.GL_COLOR_ARRAY)
gl.glDisable(gl.GL_LIGHTING)
gl.glDrawArrays(gl.GL_QUADS,0,p.grid[0]*p.grid[1]*4)
#draw grid lines
if p.drawline:
if len(p.linecolor) == 3:
gl.glColor3f(*p.linecolor)
elif len(p.linecolor) == 4:
gl.glColor4f(*p.linecolor)
row_list = [((-w, h - i * n),(w, h - i * n)) for i in range(p.grid[1] + 1)]
col_list = [((-w + i * m, h),(-w + i * m, -h)) for i in range(p.grid[0] + 1)]
ver_row_flat = [num for tuple in row_list for vertex in tuple for num in vertex]
ver_col_flat = [num for tuple in col_list for vertex in tuple for num in vertex]
vertices_row = np.array(ver_row_flat)
vertices_col = np.array(ver_col_flat)
vertices_row.shape = (-1,2)
vertices_col.shape = (-1,2)
gl.glEnableClientState(gl.GL_VERTEX_ARRAY)
gl.glDisableClientState(gl.GL_COLOR_ARRAY)
gl.glVertexPointerd(vertices_row)
gl.glDrawArrays(gl.GL_LINES,0,(p.grid[1] + 1)*2)
gl.glVertexPointerd(vertices_col)
gl.glDrawArrays(gl.GL_LINES,0,(p.grid[0] + 1)*2)
# gl.glBegin(gl.GL_LINES);
# for i in range(p.grid[1] + 1):
# gl.glVertex2f(-w, h - i * n)
# gl.glVertex2f(w, h - i * n)
# for i in range(p.grid[0] + 1):
# gl.glVertex2f(-w + i * m, h)
# gl.glVertex2f(-w + i * m, -h)
# gl.glEnd();
gl.glPopMatrix()
def draw(self):
p = self.parameters # Shorthand
if p.on:
# Calculate center
center = VisionEgg._get_center(p.position, p.anchor, p.size)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(center[0], center[1], 0.0)
gl.glRotate(-p.orientation, 0.0, 0.0, 1.0)
if len(p.color) == 3:
gl.glColor3f(*p.color)
elif len(p.color) == 4:
gl.glColor4f(*p.color)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
w = p.size[0] / 2.0
h = p.size[1] / 2.0
gl.glBegin(gl.GL_QUADS) # Draw Rectangle
gl.glVertex3f(0.25 * w, h, 0.0)
gl.glVertex3f(-w, h, 0.0)
gl.glVertex3f(-w, -h, 0.0)
gl.glVertex3f(0.25 * w, -h, 0.0)
gl.glEnd() # GL_QUADS
gl.glBegin(gl.GL_TRIANGLES) # Draw Triangle
gl.glVertex3f(1.00 * w, 0.0 * h, 0.0) # Top
gl.glVertex3f(0.25 * w, -3.0 * h, 0.0)
gl.glVertex3f(0.25 * w, 3.0 * h, 0.0)
gl.glEnd() # GL_QUADS
if p.anti_aliasing:
if not self._gave_alpha_warning:
if len(p.color) > 3 and p.color[3] != 1.0:
logger = logging.getLogger('VisionEgg.Arrow')
logger.warning("The parameter anti_aliasing is "
"set to true in the Arrow "
"stimulus class, but the color "
"parameter specifies an alpha "
"value other than 1.0. To "
"acheive anti-aliasing, ensure "
"that the alpha value for the "
"color parameter is 1.0.")
self._gave_alpha_warning = 1
# We've already drawn a filled polygon (aliased), now redraw
# the outline of the polygon (with anti-aliasing). (Using
# GL_POLYGON_SMOOTH results in artifactual lines where
# triangles were joined to create quad, at least on some OpenGL
# implementations.)
# Calculate coverage value for each pixel of outline
# and store as alpha
gl.glEnable(gl.GL_LINE_SMOOTH)
# Now specify how to use the alpha value
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
# Draw a second polygon in line mode, so the edges are anti-aliased
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_LINE)
gl.glBegin(gl.GL_QUADS)
gl.glVertex3f(0.25 * w, h, 0.0) # Draw Rectangle
gl.glVertex3f(-w, h, 0.0)
gl.glVertex3f(-w, -h, 0.0)
gl.glVertex3f(0.25 * w, -h, 0.0)
gl.glVertex3f(1.00 * w, 0.0 * h, 0.0) # Draw Triangle
gl.glVertex3f(0.25 * w, -3.0 * h, 0.0)
gl.glVertex3f(0.25 * w, 3.0 * h, 0.0)
gl.glEnd() # GL_QUADS
# Set the polygon mode back to fill mode
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
gl.glDisable(gl.GL_LINE_SMOOTH)
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
if p.center is not None:
p.anchor = 'center'
p.position = p.center[0], p.center[
1] # copy values (don't copy ref to tuple)
if p.on:
# calculate center
center = VisionEgg._get_center(p.position, p.anchor, p.size)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(center[0], center[1], 0.0)
gl.glRotate(p.orientation, 0.0, 0.0, 1.0)
if len(p.bgcolor) == 3:
gl.glColor3f(*p.bgcolor)
elif len(p.bgcolor) == 4:
gl.glColor4f(*p.bgcolor)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
w = p.size[0] / 2.0 #grid half-size
h = p.size[1] / 2.0
m = p.size[0] / p.grid[0] #cell size
n = p.size[1] / p.grid[1]
i = range(p.grid[0]) #grid index
j = range(p.grid[1])
#draw colorful cell
# vertices_list = [((-w+column*m, h-(row+1)*n, 0.0),(-w+column*m, h-row*n, 0.0),\
# (-w+(column+1)*m, h-row*n, 0.0),(-w+(column+1)*m, h-row*n, 0.0))\
# for column in j for row in i]
vertices_list = [((-w+column*m, h-(row+1)*n, 0.0),(-w+column*m, h-row*n, 0.0),\
(-w+(column+1)*m, h-row*n, 0.0),(-w+(column+1)*m, h-(row+1)*n, 0.0))\
for column in j for row in i]
colors_list = [
colormap(p.colorindex[row, column], color=p.cellcolor) * 4
for column in j for row in i
]
#flattening the vertices and colors
vertices_flat = [
num for tuple in vertices_list for vertex in tuple
for num in vertex
]
colors_flat = [num for tuple in colors_list for num in tuple]
vertices = np.array(vertices_flat)
colors = np.array(colors_flat)
vertices.shape = (-1, 3)
colors.shape = (-1, 3)
gl.glVertexPointerd(vertices)
gl.glColorPointerd(colors)
gl.glEnableClientState(gl.GL_VERTEX_ARRAY)
gl.glEnableClientState(gl.GL_COLOR_ARRAY)
gl.glDisable(gl.GL_LIGHTING)
gl.glDrawArrays(gl.GL_QUADS, 0, p.grid[0] * p.grid[1] * 4)
#draw grid lines
if p.drawline:
if len(p.linecolor) == 3:
gl.glColor3f(*p.linecolor)
elif len(p.linecolor) == 4:
gl.glColor4f(*p.linecolor)
row_list = [((-w, h - i * n), (w, h - i * n))
for i in range(p.grid[1] + 1)]
col_list = [((-w + i * m, h), (-w + i * m, -h))
for i in range(p.grid[0] + 1)]
ver_row_flat = [
num for tuple in row_list for vertex in tuple
for num in vertex
]
ver_col_flat = [
num for tuple in col_list for vertex in tuple
for num in vertex
]
vertices_row = np.array(ver_row_flat)
vertices_col = np.array(ver_col_flat)
vertices_row.shape = (-1, 2)
vertices_col.shape = (-1, 2)
gl.glEnableClientState(gl.GL_VERTEX_ARRAY)
gl.glDisableClientState(gl.GL_COLOR_ARRAY)
gl.glVertexPointerd(vertices_row)
gl.glDrawArrays(gl.GL_LINES, 0, (p.grid[1] + 1) * 2)
gl.glVertexPointerd(vertices_col)
gl.glDrawArrays(gl.GL_LINES, 0, (p.grid[0] + 1) * 2)
# gl.glBegin(gl.GL_LINES);
# for i in range(p.grid[1] + 1):
# gl.glVertex2f(-w, h - i * n)
# gl.glVertex2f(w, h - i * n)
# for i in range(p.grid[0] + 1):
# gl.glVertex2f(-w + i * m, h)
# gl.glVertex2f(-w + i * m, -h)
# gl.glEnd();
gl.glPopMatrix()
def draw(self):
# XXX This method is not speed-optimized. I just wrote it to
# get the job done. (Nonetheless, it seems faster than the C
# version commented out above.)
p = self.parameters # shorthand
if p.center is not None:
if not hasattr(VisionEgg.config,"_GAVE_CENTER_DEPRECATION"):
logger = logging.getLogger('VisionEgg.Dots')
logger.warning("Specifying DotArea2D by deprecated "
"'center' parameter deprecated. Use "
"'position' parameter instead. (Allows "
"use of 'anchor' parameter to set to "
"other values.)")
VisionEgg.config._GAVE_CENTER_DEPRECATION = 1
p.anchor = 'center'
p.position = p.center[0], p.center[1] # copy values (don't copy ref to tuple)
if p.on:
# calculate center
center = VisionEgg._get_center(p.position,p.anchor,p.size)
if p.anti_aliasing:
if len(p.color) == 4 and not self._gave_alpha_warning:
if p.color[3] != 1.0:
logger = logging.getLogger('VisionEgg.Dots')
logger.warning("The parameter anti_aliasing is "
"set to true in the DotArea2D "
"stimulus class, but the color "
"parameter specifies an alpha "
"value other than 1.0. To "
"acheive the best anti-aliasing, "
"ensure that the alpha value for "
"the color parameter is 1.0.")
self._gave_alpha_warning = 1
gl.glEnable( gl.GL_POINT_SMOOTH )
# allow max_alpha value to control blending
gl.glEnable( gl.GL_BLEND )
gl.glBlendFunc( gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA )
else:
gl.glDisable( gl.GL_BLEND )
now_sec = VisionEgg.time_func()
if self.start_times_sec is not None:
# compute extinct dots and generate new positions
replace_indices = Numeric.nonzero( Numeric.greater( now_sec - self.start_times_sec, p.dot_lifespan_sec) )
Numeric.put( self.start_times_sec, replace_indices, now_sec )
new_x_positions = RandomArray.uniform(0.0,1.0,
(len(replace_indices),))
Numeric.put( self.x_positions, replace_indices, new_x_positions )
new_y_positions = RandomArray.uniform(0.0,1.0,
(len(replace_indices),))
Numeric.put( self.y_positions, replace_indices, new_y_positions )
new_random_directions_radians = RandomArray.uniform(0.0,2*math.pi,
(len(replace_indices),))
Numeric.put( self.random_directions_radians, replace_indices, new_random_directions_radians )
else:
# initialize dot extinction values to random (uniform) distribution
self.start_times_sec = RandomArray.uniform( now_sec - p.dot_lifespan_sec, now_sec,
(self.constant_parameters.num_dots,))
signal_num_dots = int(round(p.signal_fraction * self.constant_parameters.num_dots))
time_delta_sec = now_sec - self.last_time_sec
self.last_time_sec = now_sec # reset for next loop
x_increment_normalized = math.cos(p.signal_direction_deg/180.0*math.pi) * p.velocity_pixels_per_sec / p.size[0] * time_delta_sec
y_increment_normalized = -math.sin(p.signal_direction_deg/180.0*math.pi) * p.velocity_pixels_per_sec / p.size[1] * time_delta_sec
self.x_positions[:signal_num_dots] += x_increment_normalized
self.y_positions[:signal_num_dots] += y_increment_normalized
num_random_dots = self.constant_parameters.num_dots - signal_num_dots
random_x_increment_normalized = Numeric.cos(self.random_directions_radians[signal_num_dots:]) * p.velocity_pixels_per_sec / p.size[0] * time_delta_sec
random_y_increment_normalized = -Numeric.sin(self.random_directions_radians[signal_num_dots:]) * p.velocity_pixels_per_sec / p.size[1] * time_delta_sec
self.x_positions[signal_num_dots:] += random_x_increment_normalized
self.y_positions[signal_num_dots:] += random_y_increment_normalized
self.x_positions = Numeric.fmod( self.x_positions, 1.0 ) # wrap
self.y_positions = Numeric.fmod( self.y_positions, 1.0 )
self.x_positions = Numeric.fmod( self.x_positions+1, 1.0 ) # wrap again for values < 1
self.y_positions = Numeric.fmod( self.y_positions+1, 1.0 )
xs = (self.x_positions - 0.5) * p.size[0] + center[0]
ys = (self.y_positions - 0.5) * p.size[1] + center[1]
if len(p.color)==3:
gl.glColor3f(*p.color)
elif len(p.color)==4:
gl.glColor4f(*p.color)
gl.glPointSize(p.dot_size)
# Clear the modeview matrix
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glDisable(gl.GL_TEXTURE_2D)
if p.depth is None:
depth = 0.0
else:
gl.glEnable(gl.GL_DEPTH_TEST)
depth = p.depth
zs = (depth,)*len(xs) # make N tuple with repeat value of depth
draw_dots(xs,ys,zs)
if p.anti_aliasing:
gl.glDisable( gl.GL_POINT_SMOOTH ) # turn off
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
if p.on:
# calculate center
center = VisionEgg._get_center(p.position, p.anchor, p.size)
if p.mask:
gl.glActiveTextureARB(gl.GL_TEXTURE0_ARB)
gl.glBindTexture(gl.GL_TEXTURE_1D, self._texture_object_id)
gl.glEnable(gl.GL_TEXTURE_1D)
gl.glDisable(gl.GL_TEXTURE_2D)
if p.bit_depth != self.cached_bit_depth:
self.calculate_bit_depth_dependencies()
# Clear the modeview matrix
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
# Rotate about the center of the texture
gl.glTranslate(center[0], center[1], 0)
gl.glRotate(p.orientation, 0, 0, 1)
if p.depth is None:
gl.glDisable(gl.GL_DEPTH_TEST)
depth = 0.0
else:
gl.glEnable(gl.GL_DEPTH_TEST)
depth = p.depth
# allow max_alpha value to control blending
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
if p.color2:
gl.glTexEnvi(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_BLEND)
gl.glTexEnvfv(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_COLOR, p.color2)
## alpha is ignored because the texture base internal format is luminance
else:
gl.glTexEnvi(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_MODULATE)
if p.t0_time_sec_absolute is None and not p.ignore_time:
p.t0_time_sec_absolute = VisionEgg.time_func()
w = p.size[0]
inc = w / float(p.num_samples)
if p.ignore_time:
phase = p.phase_at_t0
else:
t_var = VisionEgg.time_func() - p.t0_time_sec_absolute
phase = t_var * p.temporal_freq_hz * -360.0 + p.phase_at_t0
if p.recalculate_phase_tolerance is None or abs(self._last_phase - phase) > p.recalculate_phase_tolerance:
self._last_phase = phase # we're re-drawing the phase at this angle
floating_point_sin = (
numpy.sin(
2.0 * math.pi * p.spatial_freq * numpy.arange(0.0, w, inc, dtype=numpy.float)
+ (phase / 180.0 * math.pi)
)
* 0.5
* p.contrast
+ p.pedestal
)
floating_point_sin = numpy.clip(
floating_point_sin, 0.0, 1.0
) # allow square wave generation if contrast > 1
texel_data = (floating_point_sin * self.max_int_val).astype(self.numpy_dtype)
# PyOpenGL 2.0.1.09 has a bug, so use our own wrapper
_vegl.veglTexSubImage1D(
gl.GL_TEXTURE_1D, # target
0, # level
0, # x offset
p.num_samples, # width
self.format, # format of new texel data
self.gl_type, # type of new texel data
texel_data,
) # new texel data
if 0:
compare_array = numpy.empty(texel_data.shape, dtype=texel_data.dtype)
pixels = _vegl.veglGetTexImage(
gl.GL_TEXTURE_1D, # target
0, # level
self.format, # format
self.gl_type, # type
compare_array,
)
assert numpy.allclose(compare_array, texel_data)
h_w = p.size[0] / 2.0
h_h = p.size[1] / 2.0
l = -h_w
r = h_w
b = -h_h
t = h_h
# in the case of only color1,
# the texel data multiplies color1 to produce a color
# with color2,
# the texel data linearly interpolates between color1 and color2
gl.glColor4f(p.color1[0], p.color1[1], p.color1[2], p.max_alpha)
if p.mask:
p.mask.draw_masked_quad(
0.0,
1.0,
0.0,
1.0, # l,r,b,t for texture coordinates
l,
r,
b,
t, # l,r,b,t in eye coordinates
depth,
) # also in eye coordinates
else:
# draw unmasked quad
gl.glBegin(gl.GL_QUADS)
gl.glTexCoord2f(0.0, 0.0)
gl.glVertex3f(l, b, depth)
gl.glTexCoord2f(1.0, 0.0)
gl.glVertex3f(r, b, depth)
gl.glTexCoord2f(1.0, 1.0)
gl.glVertex3f(r, t, depth)
gl.glTexCoord2f(0.0, 1.0)
gl.glVertex3f(l, t, depth)
gl.glEnd() # GL_QUADS
gl.glDisable(gl.GL_TEXTURE_1D)
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
if p.on:
# calculate center
center = VisionEgg._get_center(p.position,p.anchor,p.size)
if p.mask:
gl.glActiveTextureARB(gl.GL_TEXTURE0_ARB)
gl.glBindTexture(gl.GL_TEXTURE_1D,self._texture_object_id)
gl.glEnable(gl.GL_TEXTURE_1D)
gl.glDisable(gl.GL_TEXTURE_2D)
if p.bit_depth != self.cached_bit_depth:
self.calculate_bit_depth_dependencies()
# Clear the modeview matrix
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
# Rotate about the center of the texture
gl.glTranslate(center[0],
center[1],
0)
gl.glRotate(p.orientation,0,0,1)
if p.depth is None:
gl.glDisable(gl.GL_DEPTH_TEST)
depth = 0.0
else:
gl.glEnable(gl.GL_DEPTH_TEST)
depth = p.depth
# allow max_alpha value to control blending
gl.glEnable( gl.GL_BLEND )
gl.glBlendFunc( gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA )
if p.color2:
gl.glTexEnvi(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_BLEND)
gl.glTexEnvfv(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_COLOR, p.color2)
## alpha is ignored because the texture base internal format is luminance
else:
gl.glTexEnvi(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_MODULATE)
if p.t0_time_sec_absolute is None and not p.ignore_time:
p.t0_time_sec_absolute = VisionEgg.time_func()
w = p.size[0]
inc = w/float(p.num_samples)
if p.ignore_time:
phase = p.phase_at_t0
else:
t_var = VisionEgg.time_func() - p.t0_time_sec_absolute
phase = t_var*p.temporal_freq_hz*-360.0 + p.phase_at_t0
if p.recalculate_phase_tolerance is None or abs(self._last_phase - phase) > p.recalculate_phase_tolerance:
self._last_phase = phase # we're re-drawing the phase at this angle
floating_point_sin = numpy.sin(2.0*math.pi*p.spatial_freq*numpy.arange(0.0,w,inc,dtype=numpy.float)+(phase/180.0*math.pi))*0.5*p.contrast+p.pedestal
floating_point_sin = numpy.clip(floating_point_sin,0.0,1.0) # allow square wave generation if contrast > 1
texel_data = (floating_point_sin*self.max_int_val).astype(self.numpy_dtype)
# PyOpenGL 2.0.1.09 has a bug, so use our own wrapper
_vegl.veglTexSubImage1D(gl.GL_TEXTURE_1D, # target
0, # level
0, # x offset
p.num_samples, # width
self.format, # format of new texel data
self.gl_type, # type of new texel data
texel_data) # new texel data
if 0:
compare_array = numpy.empty(texel_data.shape,dtype=texel_data.dtype)
pixels = _vegl.veglGetTexImage(gl.GL_TEXTURE_1D, # target
0, # level
self.format, # format
self.gl_type, # type
compare_array)
assert numpy.allclose( compare_array, texel_data )
h_w = p.size[0]/2.0
h_h = p.size[1]/2.0
l = -h_w
r = h_w
b = -h_h
t = h_h
# in the case of only color1,
# the texel data multiplies color1 to produce a color
# with color2,
# the texel data linearly interpolates between color1 and color2
gl.glColor4f(p.color1[0],p.color1[1],p.color1[2],p.max_alpha)
if p.mask:
p.mask.draw_masked_quad(0.0,1.0,0.0,1.0, # l,r,b,t for texture coordinates
l,r,b,t, # l,r,b,t in eye coordinates
depth ) # also in eye coordinates
else:
# draw unmasked quad
gl.glBegin(gl.GL_QUADS)
gl.glTexCoord2f(0.0,0.0)
gl.glVertex3f(l,b,depth)
gl.glTexCoord2f(1.0,0.0)
gl.glVertex3f(r,b,depth)
gl.glTexCoord2f(1.0,1.0)
gl.glVertex3f(r,t,depth)
gl.glTexCoord2f(0.0,1.0)
gl.glVertex3f(l,t,depth)
gl.glEnd() # GL_QUADS
gl.glDisable(gl.GL_TEXTURE_1D)
gl.glPopMatrix()
def draw(self):
p = self.parameters # shorthand
if p.center is not None:
if not hasattr(VisionEgg.config, "_GAVE_CENTER_DEPRECATION"):
logger = logging.getLogger('VisionEgg.MoreStimuli')
logger.warning("Specifying Target2D by deprecated "
"'center' parameter deprecated. Use "
"'position' parameter instead. (Allows "
"use of 'anchor' parameter to set to "
"other values.)")
VisionEgg.config._GAVE_CENTER_DEPRECATION = 1
p.anchor = 'center'
p.position = p.center[0], p.center[
1] # copy values (don't copy ref to tuple)
if p.on:
# calculate center
center = VisionEgg._get_center(p.position, p.anchor, p.size)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glTranslate(center[0], center[1], 0.0)
gl.glRotate(p.orientation, 0.0, 0.0, 1.0)
if len(p.color) == 3:
gl.glColor3f(*p.color)
elif len(p.color) == 4:
gl.glColor4f(*p.color)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glDisable(gl.GL_TEXTURE_2D)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
w = p.size[0] / 2.0
h = p.size[1] / 2.0
gl.glBegin(gl.GL_QUADS)
gl.glVertex3f(-w, -h, 0.0)
gl.glVertex3f(w, -h, 0.0)
gl.glVertex3f(w, h, 0.0)
gl.glVertex3f(-w, h, 0.0)
gl.glEnd() # GL_QUADS
if p.anti_aliasing:
if not self._gave_alpha_warning:
if len(p.color) > 3 and p.color[3] != 1.0:
logger = logging.getLogger('VisionEgg.MoreStimuli')
logger.warning("The parameter anti_aliasing is "
"set to true in the Target2D "
"stimulus class, but the color "
"parameter specifies an alpha "
"value other than 1.0. To "
"acheive anti-aliasing, ensure "
"that the alpha value for the "
"color parameter is 1.0.")
self._gave_alpha_warning = 1
# We've already drawn a filled polygon (aliased), now
# redraw the outline of the polygon (with
# anti-aliasing). (Using GL_POLYGON_SMOOTH results in
# artifactual lines where triangles were joined to
# create quad, at least on some OpenGL
# implementations.)
# Calculate coverage value for each pixel of outline
# and store as alpha
gl.glEnable(gl.GL_LINE_SMOOTH)
# Now specify how to use the alpha value
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glEnable(gl.GL_BLEND)
# Draw a second polygon in line mode, so the edges are anti-aliased
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_LINE)
gl.glBegin(gl.GL_QUADS)
gl.glVertex3f(-w, -h, 0.0)
gl.glVertex3f(w, -h, 0.0)
gl.glVertex3f(w, h, 0.0)
gl.glVertex3f(-w, h, 0.0)
gl.glEnd() # GL_QUADS
# Set the polygon mode back to fill mode
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
gl.glDisable(gl.GL_LINE_SMOOTH)
gl.glPopMatrix()
def draw(self):
# XXX This method is not speed-optimized. I just wrote it to
# get the job done. (Nonetheless, it seems faster than the C
# version commented out above.)
p = self.parameters # shorthand
if p.center is not None:
if not hasattr(VisionEgg.config, "_GAVE_CENTER_DEPRECATION"):
logger = logging.getLogger('VisionEgg.Dots')
logger.warning("Specifying DotArea2D by deprecated "
"'center' parameter deprecated. Use "
"'position' parameter instead. (Allows "
"use of 'anchor' parameter to set to "
"other values.)")
VisionEgg.config._GAVE_CENTER_DEPRECATION = 1
p.anchor = 'center'
p.position = p.center[0], p.center[
1] # copy values (don't copy ref to tuple)
if p.on:
# calculate center
center = VisionEgg._get_center(p.position, p.anchor, p.size)
if p.anti_aliasing:
if len(p.color) == 4 and not self._gave_alpha_warning:
if p.color[3] != 1.0:
logger = logging.getLogger('VisionEgg.Dots')
logger.warning("The parameter anti_aliasing is "
"set to true in the DotArea2D "
"stimulus class, but the color "
"parameter specifies an alpha "
"value other than 1.0. To "
"acheive the best anti-aliasing, "
"ensure that the alpha value for "
"the color parameter is 1.0.")
self._gave_alpha_warning = 1
gl.glEnable(gl.GL_POINT_SMOOTH)
# allow max_alpha value to control blending
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
else:
gl.glDisable(gl.GL_BLEND)
now_sec = VisionEgg.time_func()
if self.start_times_sec is not None:
# compute extinct dots and generate new positions
replace_indices = Numeric.nonzero(
Numeric.greater(now_sec - self.start_times_sec,
p.dot_lifespan_sec))
Numeric.put(self.start_times_sec, replace_indices, now_sec)
new_x_positions = RandomArray.uniform(0.0, 1.0,
(len(replace_indices), ))
Numeric.put(self.x_positions, replace_indices, new_x_positions)
new_y_positions = RandomArray.uniform(0.0, 1.0,
(len(replace_indices), ))
Numeric.put(self.y_positions, replace_indices, new_y_positions)
new_random_directions_radians = RandomArray.uniform(
0.0, 2 * math.pi, (len(replace_indices), ))
Numeric.put(self.random_directions_radians, replace_indices,
new_random_directions_radians)
else:
# initialize dot extinction values to random (uniform) distribution
self.start_times_sec = RandomArray.uniform(
now_sec - p.dot_lifespan_sec, now_sec,
(self.constant_parameters.num_dots, ))
signal_num_dots = int(
round(p.signal_fraction * self.constant_parameters.num_dots))
time_delta_sec = now_sec - self.last_time_sec
self.last_time_sec = now_sec # reset for next loop
x_increment_normalized = math.cos(
p.signal_direction_deg / 180.0 * math.pi
) * p.velocity_pixels_per_sec / p.size[0] * time_delta_sec
y_increment_normalized = -math.sin(
p.signal_direction_deg / 180.0 * math.pi
) * p.velocity_pixels_per_sec / p.size[1] * time_delta_sec
self.x_positions[:signal_num_dots] += x_increment_normalized
self.y_positions[:signal_num_dots] += y_increment_normalized
num_random_dots = self.constant_parameters.num_dots - signal_num_dots
random_x_increment_normalized = Numeric.cos(
self.random_directions_radians[signal_num_dots:]
) * p.velocity_pixels_per_sec / p.size[0] * time_delta_sec
random_y_increment_normalized = -Numeric.sin(
self.random_directions_radians[signal_num_dots:]
) * p.velocity_pixels_per_sec / p.size[1] * time_delta_sec
self.x_positions[signal_num_dots:] += random_x_increment_normalized
self.y_positions[signal_num_dots:] += random_y_increment_normalized
self.x_positions = Numeric.fmod(self.x_positions, 1.0) # wrap
self.y_positions = Numeric.fmod(self.y_positions, 1.0)
self.x_positions = Numeric.fmod(self.x_positions + 1,
1.0) # wrap again for values < 1
self.y_positions = Numeric.fmod(self.y_positions + 1, 1.0)
xs = (self.x_positions - 0.5) * p.size[0] + center[0]
ys = (self.y_positions - 0.5) * p.size[1] + center[1]
if len(p.color) == 3:
gl.glColor3f(*p.color)
elif len(p.color) == 4:
gl.glColor4f(*p.color)
gl.glPointSize(p.dot_size)
# Clear the modeview matrix
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glDisable(gl.GL_TEXTURE_2D)
if p.depth is None:
depth = 0.0
else:
gl.glEnable(gl.GL_DEPTH_TEST)
depth = p.depth
zs = (depth, ) * len(xs) # make N tuple with repeat value of depth
draw_dots(xs, ys, zs)
if p.anti_aliasing:
gl.glDisable(gl.GL_POINT_SMOOTH) # turn off
gl.glPopMatrix()
def draw(self):
"""Redraw the stimulus on every frame.
"""
p = self.parameters
if p.texture != self._using_texture: # self._using_texture is from TextureStimulusBaseClass
self._reload_texture()
self.rebuild_display_list()
if p.on:
# Set OpenGL state variables
if p.depth_test:
gl.glEnable( gl.GL_DEPTH_TEST )
else:
gl.glDisable( gl.GL_DEPTH_TEST )
gl.glEnable( gl.GL_TEXTURE_2D ) # Make sure textures are drawn
gl.glEnable( gl.GL_BLEND ) # Contrast control implemented through blending
# All of the contrast control stuff is somewhat arcane and
# not very clear from reading the code, so here is how it
# works in English. (Not that it makes it any more clear!)
#
# In the final "textured fragment" (before being blended
# to the framebuffer), the color values are equal to those
# of the texture (with the exception of texels around the
# edges which have their amplitudes reduced due to
# anti-aliasing and are intermediate between the color of
# the texture and mid-gray), and the alpha value is set to
# the contrast. Blending occurs, and by choosing the
# appropriate values for glBlendFunc, adds the product of
# fragment alpha (contrast) and fragment color to the
# product of one minus fragment alpha (contrast) and what
# was already in the framebuffer.
gl.glBlendFunc( gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA )
gl.glTexEnvi(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_DECAL)
# clear modelview matrix
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
try:
gl.glColor4f(0.5,0.5,0.5,p.contrast) # Set the polygons' fragment color (implements contrast)
if not self.constant_parameters.mipmaps_enabled:
if p.texture_min_filter in TextureStimulusBaseClass._mipmap_modes:
raise RuntimeError("Specified a mipmap mode in texture_min_filter, but mipmaps not enabled.")
self.texture_object.set_min_filter( p.texture_min_filter )
self.texture_object.set_mag_filter( p.texture_mag_filter )
self.texture_object.set_wrap_mode_s( p.texture_wrap_s )
self.texture_object.set_wrap_mode_t( p.texture_wrap_t )
if 1:
tex_phase = p.tex_phase % 1.0 # make 0 <= tex_phase < 1.0
TINY = 1.0e-10
tex = p.texture
tex.update()
if tex_phase < TINY: # it's effectively zero
gl.glBegin(gl.GL_QUADS)
gl.glTexCoord2f(tex.buf_lf,tex.buf_bf)
gl.glVertex(*p.lowerleft)
gl.glTexCoord2f(tex.buf_rf,tex.buf_bf)
gl.glVertex(*p.lowerright)
gl.glTexCoord2f(tex.buf_rf,tex.buf_tf)
gl.glVertex(*p.upperright)
gl.glTexCoord2f(tex.buf_lf,tex.buf_tf)
gl.glVertex(*p.upperleft)
gl.glEnd() # GL_QUADS
else:
# Convert tex_phase into texture buffer fraction
buf_break_f = ( (tex.buf_rf - tex.buf_lf) * (1.0-tex_phase) ) + tex.buf_lf
r = cgtypes.vec3(p.lowerright)
l = cgtypes.vec3(p.lowerleft)
quad_x_lower = (r-l)*tex_phase + l
r = cgtypes.vec3(p.upperright)
l = cgtypes.vec3(p.upperleft)
quad_x_upper = (r-l)*tex_phase + l
gl.glBegin(gl.GL_QUADS)
# First quad
gl.glTexCoord2f(buf_break_f,tex.buf_bf)
gl.glVertex(*p.lowerleft)
gl.glTexCoord2f(tex.buf_rf,tex.buf_bf)
gl.glVertex(*quad_x_lower)
gl.glTexCoord2f(tex.buf_rf,tex.buf_tf)
gl.glVertex(*quad_x_upper)
gl.glTexCoord2f(buf_break_f,tex.buf_tf)
gl.glVertex(*p.upperleft)
# Second quad
gl.glTexCoord2f(tex.buf_lf,tex.buf_bf)
gl.glVertex(*quad_x_lower)
gl.glTexCoord2f(buf_break_f,tex.buf_bf)
gl.glVertex(*p.lowerright)
gl.glTexCoord2f(buf_break_f,tex.buf_tf)
gl.glVertex(*p.upperright)
gl.glTexCoord2f(tex.buf_lf,tex.buf_tf)
gl.glVertex(*quad_x_upper)
gl.glEnd() # GL_QUADS
finally:
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPopMatrix()