Example #1
0
 def _draw(self):
     p = self.parameters
     side = p.side
     height = side * numpy.sqrt(3) / 2.
     center = VisionEgg._get_center(p.position, p.anchor, (side, height))
     position = numpy.array(center)
     hh = height / 2
     ll = position - (hh, hh)
     lr = position - (-hh, hh)
     u = position + (0., hh)
     gl.glDisable(gl.GL_DEPTH_TEST)
     gl.glDisable(gl.GL_TEXTURE_2D)
     gl.glDisable(gl.GL_BLEND)
     gl.glColor(p.color)
     gl.glBegin(gl.GL_TRIANGLES)
     self._draw_vertices(ll, lr, u)
     gl.glEnd()
     gl.glColor(p.color_edge)
     if p.anti_aliasing:
         gl.glEnable(gl.GL_LINE_SMOOTH)
     gl.glLineWidth(p.width)
     gl.glBegin(gl.GL_LINE_STRIP)
     self._draw_vertices(ll, lr, u, ll)
     gl.glEnd()
     gl.glDisable(gl.GL_LINE_SMOOTH)
Example #2
0
def draw_dots(xs,ys,zs):
    """Python method for drawing dots.  May be replaced by a faster C version."""
    if not (len(xs) == len(ys) == len(zs)):
        raise ValueError("All input arguments must be same length")
    gl.glBegin(gl.GL_POINTS)
    for i in xrange(len(xs)):
        gl.glVertex3f(xs[i],ys[i],zs[i])
    gl.glEnd()
Example #3
0
 def _draw(self):
     p = self.parameters
     gl.glDisable(gl.GL_DEPTH_TEST)
     gl.glDisable(gl.GL_TEXTURE_2D)
     gl.glDisable(gl.GL_BLEND)
     gl.glColor(p.color)
     if p.anti_aliasing:
         gl.glEnable(gl.GL_LINE_SMOOTH)
     gl.glLineWidth(p.width)
     gl.glBegin(gl.GL_LINES)
     gl.glVertex(p.position)
     gl.glVertex(p.end)
     gl.glEnd()
     gl.glDisable(gl.GL_LINE_SMOOTH)
Example #4
0
 def draw(self):
     p = self.parameters
     if p.on:
         self._gl_color(*self._color)
         gl.glDisable(gl.GL_TEXTURE_2D)
         if p.depth_test:
             gl.glEnable(gl.GL_DEPTH_TEST)
         else:
             gl.glDisable(gl.GL_DEPTH_TEST)
         if p.blending_enabled:
             gl.glEnable(gl.GL_BLEND)
         else:
             gl.glDisable(gl.GL_BLEND)
         gl.glLineWidth(self._line_width)
         gl.glBegin(gl.GL_LINE_LOOP)
         for vertex in self._vertices:
             gl.glVertex(*vertex)
         gl.glEnd()
Example #5
0
    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()
Example #6
0
    def draw(self):
        p = self.parameters  # shorthand
        if p.on:
            if len(p.color) == 3:
                gl.glColor3f(*p.color)
            elif len(p.color) == 4:
                gl.glColor4f(*p.color)

            gl.glDisable(gl.GL_TEXTURE_2D)
            if p.depth_test:
                gl.glEnable(gl.GL_DEPTH_TEST)
            else:
                gl.glDisable(gl.GL_DEPTH_TEST)
            if p.blending_enabled:
                gl.glEnable(gl.GL_BLEND)
            else:
                gl.glDisable(gl.GL_BLEND)

            gl.glBegin(gl.GL_QUADS)
            gl.glVertex(*p.vertex1)
            gl.glVertex(*p.vertex2)
            gl.glVertex(*p.vertex3)
            gl.glVertex(*p.vertex4)
            gl.glEnd()  # GL_QUADS
Example #7
0
    def draw(self):
        p = self.parameters # shorthand
        if p.on:
            if len(p.color)==3:
                gl.glColor3f(*p.color)
            elif len(p.color)==4:
                gl.glColor4f(*p.color)

            gl.glDisable(gl.GL_TEXTURE_2D)
            if p.depth_test:
                gl.glEnable(gl.GL_DEPTH_TEST)
            else:
                gl.glDisable(gl.GL_DEPTH_TEST)
            if p.blending_enabled:
                gl.glEnable(gl.GL_BLEND)
            else:
                gl.glDisable(gl.GL_BLEND)

            gl.glBegin(gl.GL_QUADS)
            gl.glVertex(*p.vertex1)
            gl.glVertex(*p.vertex2)
            gl.glVertex(*p.vertex3)
            gl.glVertex(*p.vertex4)
            gl.glEnd() # GL_QUADS
Example #8
0
 def _draw(self):
     p = self.parameters
     center = VisionEgg._get_center(p.position, p.anchor,
                                    (p.radius, p.radius))
     gl.glDisable(gl.GL_DEPTH_TEST)
     gl.glDisable(gl.GL_TEXTURE_2D)
     gl.glDisable(gl.GL_BLEND)
     gl.glColor(p.color)
     start, end = p.start, p.end
     if end < start:
         start -= 360.
     start, end = map(numpy.deg2rad, (start, end))
     frac = (end - start) / (2 * numpy.pi)
     num_triangles = float(p.num_triangles) * frac
     angles = numpy.linspace(start, end, num_triangles)
     verts = numpy.zeros((num_triangles, 2))
     verts[:, 0] = center[0] + p.radius * numpy.cos(angles)
     verts[:, 1] = center[1] + p.radius * numpy.sin(angles)
     if p.disk:
         gl.glBegin(gl.GL_TRIANGLE_FAN)
         gl.glVertex(center)
         self._draw_vertices(*verts)
         gl.glEnd()
         if p.anti_aliasing:
             gl.glEnable(gl.GL_LINE_SMOOTH)
             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_TRIANGLE_FAN)
             gl.glVertex(center)
             self._draw_vertices(*verts)
             gl.glEnd()
             gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
             gl.glDisable(gl.GL_LINE_SMOOTH)
     if p.circle:
         if p.anti_aliasing:
             gl.glEnable(gl.GL_LINE_SMOOTH)
         gl.glColor(p.color_edge)
         gl.glLineWidth(p.circle_width)
         gl.glBegin(gl.GL_LINES)
         for i in range(verts.shape[0] - 1):
             self._draw_vertices(verts[i], verts[i + 1])
         gl.glEnd()
         gl.glDisable(gl.GL_LINE_SMOOTH)
Example #9
0
 def _draw(self):
     p = self.parameters
     center = VisionEgg._get_center(p.position, p.anchor, (p.radius, p.radius))
     gl.glDisable(gl.GL_DEPTH_TEST)
     gl.glDisable(gl.GL_TEXTURE_2D)
     gl.glDisable(gl.GL_BLEND)
     gl.glColor(p.color)
     start, end = p.start, p.end
     if end < start:
         start -= 360.
     start, end = map(numpy.deg2rad, (start, end))
     frac = (end - start) / (2 * numpy.pi)
     num_triangles = float(p.num_triangles) * frac
     angles = numpy.linspace(start, end, num_triangles)
     verts = numpy.zeros((num_triangles, 2))
     verts[:,0] = center[0] + p.radius * numpy.cos(angles)
     verts[:,1] = center[1] + p.radius * numpy.sin(angles)
     if p.disk:
         gl.glBegin(gl.GL_TRIANGLE_FAN)
         gl.glVertex(center)
         self._draw_vertices(*verts)
         gl.glEnd()
         if p.anti_aliasing:
             gl.glEnable(gl.GL_LINE_SMOOTH)
             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_TRIANGLE_FAN)
             gl.glVertex(center)
             self._draw_vertices(*verts)
             gl.glEnd()
             gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
             gl.glDisable(gl.GL_LINE_SMOOTH)
     if p.circle:
         if p.anti_aliasing:
             gl.glEnable(gl.GL_LINE_SMOOTH)
         gl.glColor(p.color_edge)
         gl.glLineWidth(p.circle_width)
         gl.glBegin(gl.GL_LINES)
         for i in range(verts.shape[0]-1):
             self._draw_vertices(verts[i], verts[i+1])
         gl.glEnd()
         gl.glDisable(gl.GL_LINE_SMOOTH)
Example #10
0
    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()
Example #11
0
    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()
Example #12
0
    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()
Example #13
0
    def draw(self):
        p = self.parameters # shorthand
        if p.on:
            # calculate center
            center = VisionEgg._get_center(p.position,p.anchor,(p.radius, p.radius))
            gl.glDisable(gl.GL_DEPTH_TEST)
            gl.glDisable(gl.GL_TEXTURE_2D)
            gl.glDisable(gl.GL_BLEND)

            if len(p.color)==3:
                gl.glColor3f(*p.color)
            elif len(p.color)==4:
                gl.glColor4f(*p.color)

          # Build filled circle from points
#           gl.glBegin(gl.GL_POINTS)
#           radius = int(math.ceil(p.radius))
#           for i in range(-radius, radius):
#               for j in range(-radius, radius):
#                   if(i * i + j * j < radius * radius):
#                       gl.glVertex3f(p.position[0] + i, p.position[1] + j, 0.0)
#           gl.glEnd() # GL_POINTS

            # Build filled circle from triangles (this is typically faster
            # then the commented code above with the points)
            gl.glBegin(gl.GL_TRIANGLE_FAN)
            gl.glVertex3f(p.position[0], p.position[1], 0.0)
            angles = Numeric.arange(p.num_triangles)/float(p.num_triangles)*2.0*math.pi
            verts = Numeric.zeros( (p.num_triangles,2), Numeric.Float )
            verts[:,0] = p.position[0] + p.radius * Numeric.cos(angles)
            verts[:,1] = p.position[1] + p.radius * Numeric.sin(angles)
            for i in range(verts.shape[0]):
                gl.glVertex2fv(verts[i])
            gl.glVertex2fv(verts[0])

            gl.glEnd() # GL_TRIANGLE_FAN
            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_TRIANGLE_FAN)
                gl.glVertex3f(p.position[0], p.position[1], 0.0)
                angles = Numeric.arange(p.num_triangles)/float(p.num_triangles)*2.0*math.pi
                verts = Numeric.zeros( (p.num_triangles,2), Numeric.Float )
                verts[:,0] = p.position[0] + p.radius * Numeric.cos(angles)
                verts[:,1] = p.position[1] + p.radius * Numeric.sin(angles)
                for i in range(verts.shape[0]):
                    gl.glVertex2fv(verts[i])
                gl.glVertex2fv(verts[0])
                gl.glEnd() # GL_TRIANGLE_FAN

                # Set the polygon mode back to fill mode
                gl.glPolygonMode(gl.GL_FRONT_AND_BACK,gl.GL_FILL)
                gl.glDisable(gl.GL_LINE_SMOOTH)
Example #14
0
    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()
Example #15
0
    def draw(self):
        p = self.parameters  # shorthand
        if p.on:
            if p.mask:
                gl.glActiveTextureARB(gl.GL_TEXTURE0_ARB)
            if p.depth_test:
                gl.glEnable(gl.GL_DEPTH_TEST)
            else:
                gl.glDisable(gl.GL_DEPTH_TEST)
            if p.polygon_offset_enabled:
                gl.glEnable(gl.GL_POLYGON_OFFSET_EXT)
                gl.glPolygonOffset(p.polygon_offset_factor, p.polygon_offset_units)
            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()

            # 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).tostring()

                gl.glTexSubImage1D(
                    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

            # 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_3d(
                    0.0, 1.0, 0.0, 1.0, p.lowerleft, p.lowerright, p.upperright, p.upperleft  # for texture coordinates
                )
            else:
                # draw unmasked quad
                gl.glBegin(gl.GL_QUADS)

                gl.glTexCoord2f(0.0, 0.0)
                gl.glVertex(*p.lowerleft)

                gl.glTexCoord2f(1.0, 0.0)
                gl.glVertex(*p.lowerright)

                gl.glTexCoord2f(1.0, 1.0)
                gl.glVertex(*p.upperright)

                gl.glTexCoord2f(0.0, 1.0)
                gl.glVertex(*p.upperleft)
                gl.glEnd()  # GL_QUADS

            gl.glDisable(gl.GL_TEXTURE_1D)
            if p.polygon_offset_enabled:
                gl.glDisable(gl.GL_POLYGON_OFFSET_EXT)
Example #16
0
    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()
Example #17
0
    def draw(self):
        p = self.parameters  # shorthand
        if p.on:
            # calculate center
            center = VisionEgg._get_center(p.position, p.anchor,
                                           (p.radius, p.radius))
            gl.glDisable(gl.GL_DEPTH_TEST)
            gl.glDisable(gl.GL_TEXTURE_2D)
            gl.glDisable(gl.GL_BLEND)

            if len(p.color) == 3:
                gl.glColor3f(*p.color)
            elif len(p.color) == 4:
                gl.glColor4f(*p.color)

        # Build filled circle from points
#           gl.glBegin(gl.GL_POINTS)
#           radius = int(math.ceil(p.radius))
#           for i in range(-radius, radius):
#               for j in range(-radius, radius):
#                   if(i * i + j * j < radius * radius):
#                       gl.glVertex3f(p.position[0] + i, p.position[1] + j, 0.0)
#           gl.glEnd() # GL_POINTS

# Build filled circle from triangles (this is typically faster
# then the commented code above with the points)
            gl.glBegin(gl.GL_TRIANGLE_FAN)
            gl.glVertex3f(p.position[0], p.position[1], 0.0)
            angles = Numeric.arange(p.num_triangles) / float(
                p.num_triangles) * 2.0 * math.pi
            verts = Numeric.zeros((p.num_triangles, 2), Numeric.Float)
            verts[:, 0] = p.position[0] + p.radius * Numeric.cos(angles)
            verts[:, 1] = p.position[1] + p.radius * Numeric.sin(angles)
            for i in range(verts.shape[0]):
                gl.glVertex2fv(verts[i])
            gl.glVertex2fv(verts[0])

            gl.glEnd()  # GL_TRIANGLE_FAN
            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_TRIANGLE_FAN)
                gl.glVertex3f(p.position[0], p.position[1], 0.0)
                angles = Numeric.arange(p.num_triangles) / float(
                    p.num_triangles) * 2.0 * math.pi
                verts = Numeric.zeros((p.num_triangles, 2), Numeric.Float)
                verts[:, 0] = p.position[0] + p.radius * Numeric.cos(angles)
                verts[:, 1] = p.position[1] + p.radius * Numeric.sin(angles)
                for i in range(verts.shape[0]):
                    gl.glVertex2fv(verts[i])
                gl.glVertex2fv(verts[0])
                gl.glEnd()  # GL_TRIANGLE_FAN

                # Set the polygon mode back to fill mode
                gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
                gl.glDisable(gl.GL_LINE_SMOOTH)
Example #18
0
    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()
Example #19
0
    def draw(self):
        p = self.parameters # shorthand
        if p.on:
            if p.mask:
                gl.glActiveTextureARB(gl.GL_TEXTURE0_ARB)
            if p.depth_test:
                gl.glEnable(gl.GL_DEPTH_TEST)
            else:
                gl.glDisable(gl.GL_DEPTH_TEST)
            if p.polygon_offset_enabled:
                gl.glEnable(gl.GL_POLYGON_OFFSET_EXT)
                gl.glPolygonOffset(p.polygon_offset_factor, p.polygon_offset_units)
            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()

            # 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).tostring()

                gl.glTexSubImage1D(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

            # 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_3d(0.0,1.0,0.0,1.0, # for texture coordinates
                                           p.lowerleft,p.lowerright,p.upperright,p.upperleft)
            else:
                # draw unmasked quad
                gl.glBegin(gl.GL_QUADS)

                gl.glTexCoord2f(0.0,0.0)
                gl.glVertex(*p.lowerleft)

                gl.glTexCoord2f(1.0,0.0)
                gl.glVertex(*p.lowerright)

                gl.glTexCoord2f(1.0,1.0)
                gl.glVertex(*p.upperright)

                gl.glTexCoord2f(0.0,1.0)
                gl.glVertex(*p.upperleft)
                gl.glEnd() # GL_QUADS

            gl.glDisable(gl.GL_TEXTURE_1D)
            if p.polygon_offset_enabled:
                gl.glDisable(gl.GL_POLYGON_OFFSET_EXT)
Example #20
0
    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()