def _draw_marker(self):
gl.glPushMatrix()
ws = [50.0, 25.0, 25.0, 25.0]
hs = [100.0, -50.0, 50.0, -50.0]
for i in range(len(self.plot_data)):
# Calculate dimensions of marker
mkr_width = int(ws[i] * self.cfg.scale_x)
mkr_height = int(hs[i] * self.cfg.scale_y)
# Get last plotted x/y
mkr_x = self.plot_data[i].x_data[self.draw_idx]
mkr_y = self.plot_data[i].y_data[self.draw_idx]
# Get last plotted colour
(cr, cg, cb) = self.plot_data[i].c_data[self.draw_idx]
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
gl.glColor4f(cr, cg, cb, 0.5)
# Draw marker triangle
gl.glBegin(gl.GL_TRIANGLES)
gl.glVertex3i(mkr_x, mkr_y, 0)
gl.glVertex3i((mkr_x - mkr_width), (mkr_y + mkr_height), 0)
gl.glVertex3i((mkr_x + mkr_width), (mkr_y + mkr_height), 0)
gl.glEnd()
gl.glPopMatrix()
def render_circle(x, y, radius, colour):
"""https://gist.github.com/tsterker/1396796"""
dx, dy = radius, 0
g.glBegin(g.GL_TRIANGLE_FAN)
g.glColor3f(*colour)
g.glVertex2f(x, y)
for i in range(_CIRCLE_ITERATIONS + 1):
g.glVertex2f(x + dx, y + dy)
dx, dy = (dx * _CIRCLE_C - dy * _CIRCLE_S), (dy * _CIRCLE_C +
dx * _CIRCLE_S)
g.glEnd()
def _draw_background(self):
gl.glPushMatrix()
# Scale to fit window
gl.glScalef(*self.cfg._update_scaling())
width = int(self.cfg.plot_width)
height = int(self.cfg.plot_height)
depth = -1
log.debug('Drawing background; width=%d, height=%d, depth=%d', width, height, depth)
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
gl.glColor4f(*self.cfg.bg_colour_4f)
gl.glBegin(gl.GL_QUADS)
gl.glVertex3i(0, 0, depth)
gl.glVertex3i(0, height, depth)
gl.glVertex3i(width, height, depth)
gl.glVertex3i(width, 0, depth)
gl.glEnd()
gl.glPopMatrix()
def _draw_axis(self):
gl.glPushMatrix()
# Scale to fit window
self.cfg._update_scaling()
width = int(self.cfg.plot_width)
height = int(self.cfg.plot_height)
log.debug('Drawing axis; width=%d, height=%d', width, height)
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_LINE)
gl.glColor4f(1.0, 1.0, 1.0, 1.0)
gl.glBegin(gl.GL_LINES)
gl.glVertex3i(0, 0, 0)
gl.glVertex3i(width, 0, 0)
gl.glVertex3i(0, 0, 0)
gl.glVertex3i(0, height, 0)
gl.glEnd()
for (_lbl, pos) in self.plot_data[self.plot_idx].x_axis_markers:
gl.glBegin(gl.GL_LINES)
gl.glVertex3i(int(pos), 0, 0)
gl.glVertex3i(int(pos), -1, 0)
gl.glEnd()
log.debug('Drawing x-axis marker at %d', int(pos))
if _lbl is not None:
gl.glPushMatrix()
gl.glLoadIdentity()
pyglet.text.Label(str(_lbl), font_name='Arial', font_size=8, x=pos, y=-0.5).draw()
gl.glPopMatrix()
for (_lbl, pos) in self.plot_data[self.plot_idx].y_axis_markers:
gl.glBegin(gl.GL_LINES)
gl.glVertex3i(0, int(pos), 0)
gl.glVertex3i(-1, int(pos), 0)
gl.glEnd()
log.debug('Drawing y-axis marker at %d', int(pos))
gl.glPopMatrix()