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import OpenGL.GL as GL
import OpenGL.GLU as GLU
import weakref
class Object3DCoordinates:
def __init__(self, parent, limits = None):
"""
The parent has to be a QGLWidget
"""
self.parent = weakref.proxy(parent)
self.limits = limits
self.drawX = True
self.drawY = True
self.drawZ = True
self.delta = 0.1
def setLimits(self, limits):
self.limits = limits
def setFlags(self, xflag, yflag, zflag):
self.drawX = xflag
self.drawY = yflag
self.drawZ = zflag
def draw(self):
if self.limits is None:
return
if self.drawX or self.drawY or self.drawZ:
#get the viewport limits
vlimits = self.convertToViewportLimits(self.limits)
if self.drawX:
self.drawXAxis(vlimits)
if self.drawY:
self.drawYAxis(vlimits)
if self.drawZ:
self.drawZAxis(vlimits)
def convertToViewportLimits(self, limits):
xmin, ymin, zmin = limits[0]
xmax, ymax, zmax = limits[1]
limits = []
limits.append(GLU.gluProject(xmin, ymin, zmin))
limits.append(GLU.gluProject(xmin, ymin, zmax))
limits.append(GLU.gluProject(xmin, ymax, zmin))
limits.append(GLU.gluProject(xmin, ymax, zmax))
limits.append(GLU.gluProject(xmax, ymin, zmin))
limits.append(GLU.gluProject(xmax, ymin, zmax))
limits.append(GLU.gluProject(xmax, ymax, zmin))
limits.append(GLU.gluProject(xmax, ymax, zmax))
lminx, lminy, lminz = limits[0]
lmaxx, lmaxy, lmaxz = limits[0]
for i in range(len(limits)):
x, y, z = limits[i]
if x < lminx:
lminx = x
elif x > lmaxx:
lmaxx = x
if y < lminy:
lminy = y
elif y > lmaxy:
lmaxy = y
if z < lminz:
lminz = z
elif z > lmaxz:
lmaxz = z
return [[lminx, lminy, lminz], [lmaxx, lmaxy, lmaxz]]
def drawXAxis(self, vlimits):
xmin, ymin, zmin = self.limits[0]
xmax, ymax, zmax = self.limits[1]
difference_vector = self.limits[1] - self.limits[0]
deltax, deltay, deltaz = self.delta * (difference_vector)
begin = [[xmin, ymin - deltay, zmin - deltaz],
[xmin, ymax + deltay, zmin - deltaz],
[xmin, ymin - deltay, zmax + deltaz],
[xmin, ymax + deltay, zmax + deltaz]]
end = [[xmax, ymin - deltay, zmin - deltaz],
[xmax, ymax + deltay, zmin - deltaz],
[xmax, ymin - deltay, zmax + deltaz],
[xmax, ymax + deltay, zmax + deltaz]]
X = []
for i in range(4):
X.append([GLU.gluProject(*begin[i]),
GLU.gluProject(*end[i])])
#print "0->0, 1", vlimits[0][0], vlimits[1][0]
#print "1->0, 1", vlimits[0][1], vlimits[1][1]
possible = [1, 1, 1, 1]
i = 0
for item in X:
if (item[0][0] > vlimits[0][0]) and (item[0][0] < vlimits[1][0]) and \
(item[0][1] > vlimits[0][1]) and (item[0][1] < vlimits[1][1]):
possible[i] = 0
elif (item[1][0] > vlimits[0][0]) and (item[1][0] < vlimits[1][0]) and \
(item[1][1] > vlimits[0][1]) and (item[1][1] < vlimits[1][1]):
possible[i] = 0
i += 1
#print "POSSIBLE = ", possible
j = None
for i in range(4):
if possible[i]:
if j is None:
j = i
else:
if X[i][0][0] > X[j][0][0]:
j = i
if j is not None:
i = j
GL.glColor3f(0.5, 0.0, 0.0) #RED for X Axis
self.parent.renderText(begin[i][0], begin[i][1], begin[i][2],
"%.3f" % (begin[i][0]),
self.parent.font(), 2000)
self.parent.renderText(end[i][0], end[i][1], end[i][2],
"%.3f" % (end[i][0]),
self.parent.font(), 2000)
return
def drawYAxis(self, vlimits):
xmin, ymin, zmin = self.limits[0]
xmax, ymax, zmax = self.limits[1]
difference_vector = self.limits[1] - self.limits[0]
deltax, deltay, deltaz = self.delta * (difference_vector)
begin = [[xmin - deltax, ymin, zmin - deltaz],
[xmin - deltax, ymin, zmax + deltaz],
[xmax + deltax, ymin, zmin - deltaz],
[xmax + deltax, ymin, zmax + deltaz]]
end = [[xmin - deltax, ymax, zmin - deltaz],
[xmin - deltax, ymax, zmax + deltaz],
[xmax + deltax, ymax, zmin - deltaz],
[xmax + deltax, ymax, zmax + deltaz]]
X = []
for i in range(4):
X.append([GLU.gluProject(*begin[i]),
GLU.gluProject(*end[i])])
possible = [1, 1, 1, 1]
i = 0
for item in X:
if (item[0][0] > vlimits[0][0]) and (item[0][0] < vlimits[1][0]) and \
(item[0][1] > vlimits[0][1]) and (item[0][1] < vlimits[1][1]):
possible[i] = 0
elif (item[1][0] > vlimits[0][0]) and (item[1][0] < vlimits[1][0]) and \
(item[1][1] > vlimits[0][1]) and (item[1][1] < vlimits[1][1]):
possible[i] = 0
i += 1
j = None
for i in range(4):
if possible[i]:
if j is None:
j = i
else:
if X[i][0][0] > X[j][0][0]:
j = i
if j is not None:
i = j
GL.glColor3f(0.0, 0.5, 0.0) #GREEN for Y Axis
self.parent.renderText(begin[i][0], begin[i][1], begin[i][2],
"%.3f" % (begin[i][1]),
self.parent.font(), 2000)
self.parent.renderText(end[i][0], end[i][1], end[i][2],
"%.3f" % (end[i][1]),
self.parent.font(), 2000)
return
def drawZAxis(self, vlimits):
xmin, ymin, zmin = self.limits[0]
xmax, ymax, zmax = self.limits[1]
difference_vector = self.limits[1] - self.limits[0]
deltax, deltay, deltaz = self.delta * (difference_vector)
begin = [[xmin - deltax, ymin - deltay, zmin],
[xmin - deltax, ymax + deltay, zmin],
[xmax + deltax, ymin - deltay, zmin],
[xmax + deltax, ymax + deltay, zmin]]
end = [[xmin - deltax, ymin - deltay, zmax],
[xmin - deltax, ymax + deltay, zmax],
[xmax + deltax, ymin - deltay, zmax],
[xmax + deltax, ymax + deltay, zmax]]
X = []
for i in range(4):
X.append([GLU.gluProject(*begin[i]),
GLU.gluProject(*end[i])])
possible = [1, 1, 1, 1]
i = 0
for item in X:
if (item[0][0] > vlimits[0][0]) and (item[0][0] < vlimits[1][0]) and \
(item[0][1] > vlimits[0][1]) and (item[0][1] < vlimits[1][1]):
possible[i] = 0
elif (item[1][0] > vlimits[0][0]) and (item[1][0] < vlimits[1][0]) and \
(item[1][1] > vlimits[0][1]) and (item[1][1] < vlimits[1][1]):
possible[i] = 0
i += 1
j = None
for i in range(4):
if possible[i]:
#if pow(pow(X[i][1][0] - X[i][0][0], 2) + pow(X[i][1][1] - X[i][0][1], 2),0.5) > 30:
if j is None:
j = i
else:
if X[i][0][0] > X[j][0][0]:
j = i
if j is not None:
i = j
GL.glColor3f(0.0, 0.0, 0.5) #BLUE for Z Axis
self.parent.renderText(begin[i][0], begin[i][1], begin[i][2],
"%.3f" % (begin[i][2]),
self.parent.font(), 2000)
self.parent.renderText(end[i][0], end[i][1], end[i][2],
"%.3f" % (end[i][2]),
self.parent.font(), 2000)
return
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