class B_Spline_Kurve:
"""GLFW Rendering window class"""
def __init__(self):
# save current working directory
cwd = os.getcwd()
# Initialize the library
if not glfw.init():
return
# restore cwd
os.chdir(cwd)
# buffer hints
glfw.window_hint(glfw.DEPTH_BITS, 32)
# define desired frame rate
self.frame_rate = 100
# make a window
self.width, self.height = 640, 480
self.aspectwidth = float(self.width) / float(self.height)
self.window = glfw.create_window(self.width, self.height,
"2D Graphics", None, None)
if not self.window:
glfw.terminate()
return
# Make the window's context current
glfw.make_context_current(self.window)
# initialize GL
glViewport(0, 0, self.width, self.height)
glEnable(GL_DEPTH_TEST)
glClearColor(0.0, 0.0, 0.0, 1.0)
glMatrixMode(GL_PROJECTION)
glMatrixMode(GL_MODELVIEW)
# set window callbacks
glfw.set_mouse_button_callback(self.window, self.onMouseButton)
glfw.set_cursor_pos_callback(self.window, self.onMouseMove)
glfw.set_key_callback(self.window, self.onKeyboard)
# create 3D
self.scene = Scene()
# exit flag
self.exitNow = False
# mouse
self.leftMouseClicked = False
self.mousePos = (0, 0)
def onMouseButton(self, win, button, action, mods):
# print("mouse button: ", win, button, action, mods)
if button == glfw.MOUSE_BUTTON_LEFT and not mods == glfw.MOD_SHIFT:
if action == glfw.RELEASE:
print("Punkt gesetzt")
self.scene.addPoint(self.mousePos[0], self.mousePos[1])
if button == glfw.MOUSE_BUTTON_LEFT and mods == glfw.MOD_SHIFT:
if action == glfw.PRESS:
self.leftMouseClicked = True
elif action == glfw.RELEASE:
self.leftMouseClicked = False
self.scene.onPoint = False
def onMouseMove(self, win, posX, posY):
x = posX / self.width * 2 - 1
y = (posY / self.height * 2 - 1) * (-1)
self.mousePos = (x, y)
if (self.leftMouseClicked):
if self.scene.onPoint:
if self.scene.lastPos[1] > self.mousePos[1]:
actWeight = self.scene.pointsWeight[self.scene.idxPoint]
oldWeight = actWeight[3]
if oldWeight > 1:
newWeight = oldWeight - 0.25
actWeight[3] = newWeight
else:
actWeight = self.scene.pointsWeight[self.scene.idxPoint]
oldWeight = actWeight[3]
if oldWeight < 10:
newWeight = oldWeight + 0.25
actWeight[3] = newWeight
self.scene.pointsWeight[self.scene.idxPoint] = actWeight
self.scene.lastPos = self.mousePos
self.scene.drawCurve()
else:
self.scene.getPoint(self.mousePos[0], self.mousePos[1])
def onKeyboard(self, win, key, scancode, action, mods):
# print("keyboard: ", win, key, scancode, action, mods)
if action == glfw.PRESS:
# ESC to quit
if key == glfw.KEY_ESCAPE:
self.exitNow = True
# Ordnung der Kurve verringern
if key == glfw.KEY_K and not mods == glfw.MOD_SHIFT:
print("[k]:", self.scene.k, "Ordnung")
self.scene.k -= 1
self.scene.drawCurve()
# Ordnung der Kurve erhöhen
if key == glfw.KEY_K and mods == glfw.MOD_SHIFT:
print("[K]:", self.scene.k, "Ordnung")
self.scene.k += 1
self.scene.drawCurve()
# Anzahl zu berechnender Kurvenpunkte verringern
if key == glfw.KEY_M and not mods == glfw.MOD_SHIFT:
print("[m]:", self.scene.m, "Kurvenpunkte")
self.scene.m -= 1
self.scene.drawCurve()
# Anzahl zu berechnender Kurvenpunkte erhöhen
if key == glfw.KEY_M and mods == glfw.MOD_SHIFT:
print("[M]:", self.scene.m, "Kurvenpunkte")
self.scene.m += 1
self.scene.drawCurve()
def run(self):
# initializer timer
glfw.set_time(0.0)
t = 0.0
while not glfw.window_should_close(self.window) and not self.exitNow:
# update every x seconds
currT = glfw.get_time()
if currT - t > 1.0 / self.frame_rate:
# update time
t = currT
# clear
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
# render scene
self.scene.render()
glfw.swap_buffers(self.window)
# Poll for and process events
glfw.poll_events()
# end
glfw.terminate()
