def __init__(self, shape, pts, texcoords, faces, normals=None, smooth=True):
"""Generate a vertex buffer to hold data and indices. If no normals
are provided then these are generated.
Arguments:
*shape*
Shape object that this Buffer is a child of
*pts*
array of vertices tuples i.e. [(x0,y0,z0), (x1,y1,z1),...]
*texcoords*
array of texture (uv) coordinates tuples
i.e. [(u0,v0), (u1,v1),...]
*faces*
array of indices (of pts array) defining triangles
i.e. [(a0,b0,c0), (a1,b1,c1),...]
Keyword arguments:
*normals*
array of vector component tuples defining normals at each
vertex i.e. [(x0,y0,z0), (x1,y1,z1),...]
*smooth*
if calculating normals then average normals for all faces
meeting at this vertex, otherwise just use first (for speed).
"""
super(Buffer, self).__init__()
# Uniform variables all in one array!
self.unib = (c_float * 9)(0.0, 0.0, 0.0, 0.5, 0.5, 0.5, 1.0, 1.0, 0.0)
""" pass to shader array of vec3 uniform variables:
===== ============================ ==== ==
vec3 description python
----- ---------------------------- -------
index from to
===== ============================ ==== ==
0 ntile, shiny, blend 0 2
1 material 3 5
2 umult, vmult (only 2 used) 6 7
===== ============================ ==== ==
"""
self.shape = shape
if not normals:
LOGGER.debug("Calculating normals ...")
normals = [[] for p in pts]
# Calculate normals.
for f in faces:
a, b, c = f[0:3]
ab = Utility.vec_sub(pts[a], pts[b])
bc = Utility.vec_sub(pts[a], pts[c])
n = tuple(Utility.vec_normal(Utility.vec_cross(ab, bc)))
for x in f[0:3]:
normals[x].append(n)
for i, n in enumerate(normals):
if n:
if smooth:
norms = [sum(v[k] for v in n) for k in range(3)]
else: # This should be slightly faster for large shapes
norms = [n[0][k] for k in range(3)]
normals[i] = tuple(Utility.vec_normal(norms))
else:
normals[i] = 0, 0, 0.01
# keep a copy for speeding up the collision testing of ElevationMap
self.vertices = pts
self.normals = normals
self.tex_coords = texcoords
self.indices = faces
self.material = (0.5, 0.5, 0.5, 1.0)
# Pack points,normals and texcoords into tuples and convert to ctype floats.
points = [p + n + t for p, n, t in zip(pts, normals, texcoords)]
self.array_buffer = c_floats(list(itertools.chain(*points)))
self.ntris = len(faces)
points = [f[0:3] for f in faces]
self.element_array_buffer = c_shorts(list(itertools.chain(*points)))
def _lathe(self, path, sides=12, rise=0.0, loops=1.0):
"""Returns a Buffer object by rotating the points defined in path.
Arguments:
*path*
An array of points [(x0, y0), (x1, y1) ...] to rotate around
the y axis.
Keyword arguments:
*sides*
Number of sides to divide each rotation into.
*rise*
Amount to increment the path y values for each rotation (ie helix)
*loops*
Number of times to rotate the path by 360 (ie helix).
"""
self.sides = sides
s = len(path)
rl = int(self.sides * loops)
pn = 0
pp = 0
tcx = 1.0 / self.sides
pr = (pi / self.sides) * 2.0
rdiv = rise / rl
# Find largest and smallest y of the path used for stretching the texture
miny = path[0][1]
maxy = path[s - 1][1]
for p in range(s):
if path[p][1] < miny:
miny = path[p][1]
if path[p][1] > maxy:
maxy = path[p][1]
verts = []
norms = []
idx = []
tex_coords = []
opx = path[0][0]
opy = path[0][1]
for p in range(s):
px = path[p][0] * 1.0
py = path[p][1] * 1.0
tcy = 1.0 - ((py - miny) / (maxy - miny))
# Normalized 2D vector between path points
dx, dy = Utility.vec_normal(Utility.vec_sub((px, py), (opx, opy)))
for r in range(0, rl):
sinr = sin(pr * r)
cosr = cos(pr * r)
verts.append((px * sinr, py, px * cosr))
norms.append((-sinr * dy, dx, -cosr * dy))
tex_coords.append((1.0 - tcx * r, tcy))
py += rdiv
# Last path profile (tidies texture coords).
verts.append((0, py, px))
norms.append((0, dx, -dy))
tex_coords.append((0, tcy))
if p < s - 1:
pn += (rl + 1)
for r in range(rl):
idx.append((pp + r + 1, pp + r, pn + r))
idx.append((pn + r, pn + r + 1, pp + r + 1))
pp += (rl + 1)
opx = px
opy = py
return Buffer(self, verts, tex_coords, idx, norms)
def _lathe(self, path, sides=12, rise=0.0, loops=1.0):
"""Returns a Buffer object by rotating the points defined in path.
Arguments:
*path*
An array of points [(x0, y0), (x1, y1) ...] to rotate around
the y axis.
Keyword arguments:
*sides*
Number of sides to divide each rotation into.
*rise*
Amount to increment the path y values for each rotation (ie helix)
*loops*
Number of times to rotate the path by 360 (ie helix).
"""
self.sides = sides
s = len(path)
rl = int(self.sides * loops)
pn = 0
pp = 0
tcx = 1.0 / self.sides
pr = (pi / self.sides) * 2.0
rdiv = rise / rl
# Find largest and smallest y of the path used for stretching the texture
miny = path[0][1]
maxy = path[s-1][1]
for p in range(s):
if path[p][1] < miny:
miny = path[p][1]
if path[p][1] > maxy:
maxy = path[p][1]
verts = []
norms = []
idx = []
tex_coords = []
opx = path[0][0]
opy = path[0][1]
for p in range(s):
px = path[p][0] * 1.0
py = path[p][1] * 1.0
tcy = 1.0 - ((py - miny) / (maxy - miny))
# Normalized 2D vector between path points
dx, dy = Utility.vec_normal(Utility.vec_sub((px, py), (opx, opy)))
for r in range (0, rl):
sinr = sin(pr * r)
cosr = cos(pr * r)
verts.append((px * sinr, py, px * cosr))
norms.append((-sinr * dy, dx, -cosr * dy))
tex_coords.append((1.0 - tcx * r, tcy))
py += rdiv
# Last path profile (tidies texture coords).
verts.append((0, py, px))
norms.append((0, dx, -dy))
tex_coords.append((0, tcy))
if p < s - 1:
pn += (rl + 1)
for r in range(rl):
idx.append((pp + r + 1, pp + r, pn + r))
idx.append((pn + r, pn + r + 1, pp + r + 1))
pp += (rl + 1)
opx = px
opy = py
return Buffer(self, verts, tex_coords, idx, norms)
def _lathe(self, path, sides=12, rise=0.0, loops=1.0):
"""Returns a Buffer object by rotating the points defined in path.
Arguments:
*path*
An array of points [(x0, y0), (x1, y1) ...] to rotate around
the y axis.
Keyword arguments:
*sides*
Number of sides to divide each rotation into.
*rise*
Amount to increment the path y values for each rotation (ie helix)
*loops*
Number of times to rotate the path by 360 (ie helix).
"""
self.sides = sides
s = len(path)
rl = int(self.sides * loops)
pn = 0
pp = 0
tcx = 1.0 / self.sides
pr = (pi / self.sides) * 2.0
rdiv = rise / rl
# Find length of the path
path_len = 0.0
for p in range(1, s):
path_len += ((path[p][0] - path[p-1][0])**2 +
(path[p][1] - path[p-1][1])**2)**0.5
verts = []
norms = []
idx = []
tex_coords = []
opx = path[0][0]
opy = path[0][1]
tcy = 0.0
for p in range(s):
px = path[p][0] * 1.0
py = path[p][1] * 1.0
if p > 0:
tcy += ((path[p][0] - path[p-1][0])**2 +
(path[p][1] - path[p-1][1])**2)**0.5 / path_len
# Normalized 2D vector between path points
if p == 0:
ipx, ipy = path[1][0] * 1.0, path[1][1] * 1.0
else:
ipx, ipy = px, py
dx, dy = Utility.vec_normal(Utility.vec_sub((ipx, ipy), (opx, opy)))
for r in range (0, rl + 1):
sinr = sin(pr * r)
cosr = cos(pr * r)
verts.append((px * sinr, py, px * cosr))
norms.append((-sinr * dy, dx, -cosr * dy))
tex_coords.append((1.0 - tcx * r, tcy))
py += rdiv
if p < s - 1:
pn += (rl + 1)
for r in range(rl):
idx.append((pp + r + 1, pp + r, pn + r))
idx.append((pn + r, pn + r + 1, pp + r + 1))
pp += (rl + 1)
opx = px
opy = py
return Buffer(self, verts, tex_coords, idx, norms)
def _lathe(self, path, sides=12, rise=0.0, loops=1.0):
"""Returns a Buffer object by rotating the points defined in path.
Arguments:
*path*
An array of points [(x0, y0), (x1, y1) ...] to rotate around
the y axis.
Keyword arguments:
*sides*
Number of sides to divide each rotation into.
*rise*
Amount to increment the path y values for each rotation (ie helix)
*loops*
Number of times to rotate the path by 360 (ie helix).
"""
self.sides = sides
s = len(path)
rl = int(self.sides * loops)
pn = 0
pp = 0
tcx = 1.0 / self.sides
pr = (pi / self.sides) * 2.0
rdiv = rise / rl
# Find length of the path
path_len = 0.0
for p in range(1, s):
path_len += ((path[p][0] - path[p - 1][0])**2 +
(path[p][1] - path[p - 1][1])**2)**0.5
verts = []
norms = []
idx = []
tex_coords = []
opx = path[0][0]
opy = path[0][1]
tcy = 0.0
for p in range(s):
px = path[p][0] * 1.0
py = path[p][1] * 1.0
if p > 0:
tcy += ((path[p][0] - path[p - 1][0])**2 +
(path[p][1] - path[p - 1][1])**2)**0.5 / path_len
# Normalized 2D vector between path points
if p == 0:
ipx, ipy = path[1][0] * 1.0, path[1][1] * 1.0
else:
ipx, ipy = px, py
dx, dy = Utility.vec_normal(Utility.vec_sub((ipx, ipy),
(opx, opy)))
for r in range(0, rl + 1):
sinr = sin(pr * r)
cosr = cos(pr * r)
verts.append((px * sinr, py, px * cosr))
norms.append((-sinr * dy, dx, -cosr * dy))
tex_coords.append((1.0 - tcx * r, tcy))
py += rdiv
if p < s - 1:
pn += (rl + 1)
for r in range(rl):
idx.append((pp + r + 1, pp + r, pn + r))
idx.append((pn + r, pn + r + 1, pp + r + 1))
pp += (rl + 1)
opx = px
opy = py
return Buffer(self, verts, tex_coords, idx, norms)
def __init__(self,
shape,
pts,
texcoords,
faces,
normals=None,
smooth=True):
"""Generate a vertex buffer to hold data and indices. If no normals
are provided then these are generated.
Arguments:
*shape*
Shape object that this Buffer is a child of
*pts*
array of vertices tuples i.e. [(x0,y0,z0), (x1,y1,z1),...]
*texcoords*
array of texture (uv) coordinates tuples
i.e. [(u0,v0), (u1,v1),...]
*faces*
array of indices (of pts array) defining triangles
i.e. [(a0,b0,c0), (a1,b1,c1),...]
Keyword arguments:
*normals*
array of vector component tuples defining normals at each
vertex i.e. [(x0,y0,z0), (x1,y1,z1),...]
*smooth*
if calculating normals then average normals for all faces
meeting at this vertex, otherwise just use first (for speed).
"""
super(Buffer, self).__init__()
# Uniform variables all in one array!
self.unib = (c_float * 12)(0.0, 0.0, 0.0, 0.5, 0.5, 0.5, 1.0, 1.0, 0.0,
0.0, 0.0, 0.0)
""" pass to shader array of vec3 uniform variables:
===== ============================ ==== ==
vec3 description python
----- ---------------------------- -------
index from to
===== ============================ ==== ==
0 ntile, shiny, blend 0 2
1 material 3 5
2 umult, vmult (only 2 used) 6 7
3 u_off, v_off (only 2 used) 9 10
===== ============================ ==== ==
"""
self.shape = shape
if not normals:
LOGGER.debug("Calculating normals ...")
normals = [[] for p in pts]
# Calculate normals.
for f in faces:
a, b, c = f[0:3]
ab = Utility.vec_sub(pts[a], pts[b])
bc = Utility.vec_sub(pts[a], pts[c])
n = tuple(Utility.vec_normal(Utility.vec_cross(ab, bc)))
for x in f[0:3]:
normals[x].append(n)
for i, n in enumerate(normals):
if n:
if smooth:
norms = [sum(v[k] for v in n) for k in range(3)]
else: # This should be slightly faster for large shapes
norms = [n[0][k] for k in range(3)]
normals[i] = tuple(Utility.vec_normal(norms))
else:
normals[i] = 0, 0, 0.01
# keep a copy for speeding up the collision testing of ElevationMap
self.vertices = pts
self.normals = normals
self.tex_coords = texcoords
self.indices = faces
self.material = (0.5, 0.5, 0.5, 1.0)
# Pack points,normals and texcoords into tuples and convert to ctype floats.
points = [p + n + t for p, n, t in zip(pts, normals, texcoords)]
self.array_buffer = c_floats(list(itertools.chain(*points)))
self.ntris = len(faces)
points = [f[0:3] for f in faces]
self.element_array_buffer = c_shorts(list(itertools.chain(*points)))
