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import basetestcase
import os
from OpenGL.GL import *
from OpenGL.GLU import *
try:
import numpy as np
except ImportError as err:
np = None
HERE = os.path.abspath(os.path.dirname(__file__))
class TestTess( basetestcase.BaseTest ):
TESS_TEST_SHAPE = [
[191, 0],
[ 191, 1480],
[ 191, 1480],
[ 401, 1480],
[ 401, 1480],
[401, 856],
[401, 856],
[1105, 856],
[1105, 856],
[1105, 1480],
[1105, 1480],
[1315, 1480],
[1315, 1480],
[1315, 0],
[1315, 0],
[1105, 0],
[1105, 0],
[1105, 699],
[1105, 699],
[401, 699],
[401, 699],
[401, 0],
[401, 0],
[191, 0],
[191, 0],
[191, 0],
]
def test_tess(self ):
"""Test that tessellation works"""
glDisable( GL_LIGHTING )
glColor3f( 1,1,1 )
glNormal3f( 0,0,1 )
def begin( *args ):
return glBegin( *args )
def vertex( *args ):
return glVertex3dv( *args )
def end( *args ):
return glEnd( *args )
def combine( coords, vertex_data, weight):
return coords
tobj = gluNewTess()
gluTessCallback(tobj, GLU_TESS_BEGIN, begin);
gluTessCallback(tobj, GLU_TESS_VERTEX, vertex);
gluTessCallback(tobj, GLU_TESS_END, end);
gluTessCallback(tobj, GLU_TESS_COMBINE, combine);
gluTessBeginPolygon(tobj, None);
gluTessBeginContour(tobj);
for (x,y) in self.TESS_TEST_SHAPE:
vert = (x,y,0.0)
gluTessVertex(tobj, vert, vert);
gluTessEndContour(tobj);
gluTessEndPolygon(tobj);
def test_tess_collection( self ):
"""SF#2354596 tessellation combine results collected"""
all_vertices = []
combinations = []
def start(*args):
pass
def stop(*args):
pass
def tessvertex(vertex_data, polygon_data=None):
# polygon data *should* be collected here
#assert polygon_data is all_vertices, polygon_data
all_vertices.append(vertex_data)
#collected.append( vertex_data )
return polygon_data
def tesscombine(coords, vertex_data, weights,_=None):
new = (True,coords)
combinations.append( coords )
return new
def tessedge(flag,*args,**named):
pass # dummy
def tesserr( enum ):
raise RuntimeError( gluErrorString( enum ) )
# set up tessellator in CSG intersection mode
tess=gluNewTess()
gluTessProperty(tess, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_ABS_GEQ_TWO)
gluTessCallback(tess, GLU_TESS_BEGIN, start)
gluTessCallback(tess, GLU_TESS_END, stop)
gluTessCallback(tess, GLU_TESS_EDGE_FLAG, tessedge) # no strips
gluTessCallback(tess, GLU_TESS_VERTEX, tessvertex)
gluTessCallback(tess, GLU_TESS_ERROR, tesserr )
gluTessCallback(tess, GLU_TESS_COMBINE, tesscombine)
gluTessBeginPolygon(tess, all_vertices)
try:
for contour in [
# first square
[(-1,0,-1),(1,0,-1),(1,0,1),(-1,0,1)],
# second intersects the first
[(.5,0,-.5),(1.5,0,-.5),(1.5,0,.5),(.5,0,.5)],
]:
gluTessBeginContour(tess)
try:
for point in contour:
if np:
if OpenGL.ERROR_ON_COPY:
point = np.array( point, 'd' )
else:
point = np.array( point, 'f' )
else:
point = (GLdouble*3)(*point)
gluTessVertex( tess, point, (False,point))
finally:
gluTessEndContour(tess)
finally:
gluTessEndPolygon(tess)
# Show collected triangle vertices :-
# Original input vertices are marked as False.
# Vertices generated in combine callback are marked as True.
assert all_vertices, "Nothing collected"
combined,original = [x for x in all_vertices if x[0]], [x for x in all_vertices if not x[0]]
assert combined, ("No combined vertices", all_vertices )
assert original, ("No original vertices", all_vertices )
assert len(combinations) == 2, combinations
def test_tess_cb_traditional( self ):
outline = [
[191, 0],
[ 191, 1480],
[ 191, 1480],
[ 401, 1480],
[ 401, 1480],
[401, 856],
[401, 856],
[1105, 856],
[1105, 856],
[1105, 1480],
[1105, 1480],
[1315, 1480],
[1315, 1480],
[1315, 0],
[1315, 0],
[1105, 0],
[1105, 0],
[1105, 699],
[1105, 699],
[401, 699],
[401, 699],
[401, 0],
[401, 0],
[191, 0],
[191, 0],
[191, 0],
]
scale = 1200.
self.tess = gluNewTess()
gluTessCallback(self.tess, GLU_TESS_BEGIN, glBegin)
def test( t, polyData=None ):
glNormal( 0,0, -1 )
glColor3f( t[0],t[1],t[2] )
return glVertex3f( t[0],t[1],t[2])
gluTessCallback(self.tess, GLU_TESS_VERTEX_DATA, test)
gluTessCallback(self.tess, GLU_TESS_END, glEnd);
combined = []
def combine( points, vertices, weights ):
#print 'combine called', points, vertices, weights
combined.append( points )
return points
gluTessCallback(self.tess, GLU_TESS_COMBINE, combine)
gluTessBeginPolygon( self.tess, None )
try:
gluTessBeginContour( self.tess )
try:
for (x,y) in outline:
if np:
vertex = np.array((x/scale,y/scale,0.0),'d')
else:
vertex = (GLdouble*3)(x/scale,y/scale,0.0)
gluTessVertex(self.tess, vertex, vertex)
finally:
gluTessEndContour( self.tess )
finally:
gluTessEndPolygon(self.tess)
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