def _post_draw(self):
GLArray._post_draw(self)
if self._sprite_texture == None:
return
self._sprite_texture.unbind()
glDisable(GL_BLEND)
glDisable(GL_POINT_SPRITE)
def _update(self, x, y, nx, ny):
print ' Grid: updating cache...'
self.x = x
self.y = y
self.nx = nx
self.ny = ny
dx = self.x / self.nx
dy = self.y / self.ny
points = [ ]
for i in range(nx):
points.append([i*dx, 0.0, 0.0])
points.append([i*dx, y, 0.0])
points.append([x, 0.0, 0.0])
points.append([x, y, 0.0])
for i in range(ny):
points.append([0.0, i*dy, 0.0])
points.append([x, i*dy, 0.0])
points.append([0, y, 0.0])
points.append([x, y, 0.0])
self.buffer = GLArray(points)
self.buffer.renderMode(GL_LINES)
def _pre_draw(self):
GLArray._pre_draw(self)
if self._sprite_texture == None:
return
glDepthMask(GL_FALSE)
glEnable(GL_POINT_SMOOTH)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE)
self._sprite_texture.bind()
glTexEnvf(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE)
glEnable(GL_POINT_SPRITE)
glPointSize(15.0)
class Grid:
def __init__(self):
self.x = None
self.y = None
self.nx = None
self.ny = None
def __call__(self, x, y, nx, ny):
checks = [
self.x != x,
self.y != y,
self.nx != nx,
self.ny != ny ]
if any(checks):
self._update(x, y, nx, ny)
self.buffer.draw()
def _update(self, x, y, nx, ny):
print ' Grid: updating cache...'
self.x = x
self.y = y
self.nx = nx
self.ny = ny
dx = self.x / self.nx
dy = self.y / self.ny
points = [ ]
for i in range(nx):
points.append([i*dx, 0.0, 0.0])
points.append([i*dx, y, 0.0])
points.append([x, 0.0, 0.0])
points.append([x, y, 0.0])
for i in range(ny):
points.append([0.0, i*dy, 0.0])
points.append([x, i*dy, 0.0])
points.append([0, y, 0.0])
points.append([x, y, 0.0])
self.buffer = GLArray(points)
self.buffer.renderMode(GL_LINES)
def __init__(self, vertex_data=None, color_data=None):
GLArray.__init__(self, vertex_data, color_data)
self._sprite_texture = None
