def _common_init(self, **keys):
"""
"""
if len(keys["points"]) < 3:
raise Exception("ACenterPolygon: Too few points in..")
self._indexes = []
self._points = pgl.Point3Array([pgl.Vector3()] + keys["points"])
for i in xrange(1, len(keys["points"])):
self._points[0] += self._points[i]
self._indexes.append(pgl.Index([0, i, i + 1]))
self._points[0] += self._points[len(keys["points"])]
self._indexes.append(pgl.Index([0, len(keys["points"]), 1]))
self._points[0] = self._points[0] / len(keys["points"])
self._indexes = pgl.IndexArray(self._indexes)
def genericLeaf(allo_length, allo_surf, **kwds):
if kwds.has_key('surface'):
surface = kwds['surface']
length = math.sqrt(surface / (allo_length*allo_surf) )
else:
length = kwds.get('length', 1)
alpha = kwds.get('alpha', 0)
color = kwds.get('color', __niceGreen)
step = length/10.
x = array(arange(step,length,step)) #begin and end are specific
y = (-3.0*allo_length*allo_surf) * (x**2/length - x)
cos = math.cos(math.radians(alpha/2.0))
sin = math.sin(math.radians(alpha/2.0))
list = []
idxList = []
for i in range(len(x)):
list.append(pgl.Vector3(x[i],0,0))
list.append(pgl.Vector3(x[i],y[i]*cos,y[i]*sin))
list.append(pgl.Vector3(x[i],-y[i]*cos,y[i]*sin))
list.append(pgl.Vector3(0,0,0))
list.append(pgl.Vector3(length,0,0))
for i in range(len(x) -1):
idxList.append(pgl.Index(3*(i+1), 3*(i+1)+1, 3*i+1, 3*i ))
idxList.append(pgl.Index(3*i+2, 3*(i+1)+2, 3*(i+1), 3*i ))
idxList.append(pgl.Index(0, 1, len(list)-2 ))
idxList.append(pgl.Index(2, 0, len(list)-2 ))
idxList.append(pgl.Index(3*(len(x)-1)+1, 3*(len(x)-1), len(list)-1 ))
idxList.append(pgl.Index(3*(len(x)-1), 3*(len(x)-1)+2, len(list)-1 ))
p3r = pgl.Point3Array(list)
ir = pgl.IndexArray(idxList)
fs = pgl.FaceSet(p3r, ir)
return pgl.Shape(fs, color)
def mangoLeaf(length = 1, alpha=0, color = __niceGreen):
x = array(arange(0.1,length,0.1))
y = (-3/(length*5.)) * (x**2/length - x)
cos = math.cos(math.radians(alpha/2.0))
sin = math.sin(math.radians(alpha/2.0))
list = []
idxList = []
for i in range(len(x)):
list.append(pgl.Vector3(x[i],0,0))
list.append(pgl.Vector3(x[i],y[i]*cos,y[i]*sin))
list.append(pgl.Vector3(x[i],-y[i]*cos,y[i]*sin))
list.append(pgl.Vector3(0,0,0))
list.append(pgl.Vector3(length,0,0))
for i in range(len(x) -1):
idxList.append(pgl.Index(3*(i+1), 3*(i+1)+1, 3*i+1, 3*i ))
idxList.append(pgl.Index(3*i+2, 3*(i+1)+2, 3*(i+1), 3*i ))
#idxList.append(pgl.Index(3*i,3*i+1,3*(i+1)+1, 3*(i+1)))
#idxList.append(pgl.Index(3*i,3*(i+1),3*(i+1)+2,3*i+2))
idxList.append(pgl.Index(0, 1, len(list)-2 ))
idxList.append(pgl.Index(2, 0, len(list)-2 ))
idxList.append(pgl.Index(3*(len(x)-1)+1, 3*(len(x)-1), len(list)-1 ))
idxList.append(pgl.Index(3*(len(x)-1), 3*(len(x)-1)+2, len(list)-1 ))
#idxList.append(pgl.Index(len(list)-2, 1, 0))
#idxList.append(pgl.Index(len(list)-2, 0, 2))
#idxList.append(pgl.Index(len(list)-1, 3*(len(x)-1), 3*(len(x)-1)+1))
#idxList.append(pgl.Index(len(list)-1, 3*(len(x)-1)+2, 3*(len(x)-1)))
#p3r = pgl.Point3Array(list)
#ir = pgl.IndexArray(idxList)
fs = pgl.FaceSet(list,idxList)
return pgl.Shape(fs, color)