You can use this function to set land materials using either a greyscale or
indexed image. I've tested it with several dozen materials.
To create a material map in GIMP, you'll want to start with the correct size,
draw blocks of the colors you want to use (don't leave black or white unless
you intend to use them as colors), Image > Mode > Indexed with an optimum
palette made of the number of colors you want, then once it's indexed go to
work on your material map.
When calling it, you'll need to pass a tuple or list with the materials you
want to use; ie:
material_names = ("water", "sand", "grass", "shale", "snow", "lava")
materials = []
for mat in material_names :
materials.append(soya.Material.get(mat))
land.set_material_from_image(soya.Image.get("texmap.png"), materials)
I don't know if it'll work without my previous patch to add indexed image
support, since this tests to see if self.palette is true (set to None for
greyscale or RGB(A) images, otherwise a string).
It's several times faster than the version I wrote in python earlier this week:
class NewLand(soya.Land) :
def set_material_from_image(self, texmap, materials) :
if texmap.width != self.width or texmap.height != self.depth :
raise('Texture map must be the same size as heightexmap')
if texmap.nb_color != 1 :
raise('Texture map must be greyscale or indexed')
if self.palette : num_materials = len(self.palette)/3
else : num_materials = 256
if len(materials) < num_materials :
raise('Not enough materials provided')
pixs = texmap.pixels
for y in range(self.depth) :
print 'processing line %d' % y
yoffset = y * self.width
for x in range(self.width) :
pix = pixs[(yoffset + x)]
self.set_material(x, y, materials[pix])
The patch to land.pyx in pyrex is attached:
Index: model/land.pyx
===================================================================
RCS file: /cvs/soya/soya/model/land.pyx,v
retrieving revision 1.23
diff -r1.23 land.pyx
417a418,443
>
> def set_material_from_image(self, _Image image, materials):
> cdef int i, m, w, h, hoffset
> cdef LandVertex* vertex
> cdef Pack* pack[256]
> if (self._nb_vertex_width != image.width) or \
> (self._nb_vertex_depth != image.height) :
> print "WARNING Material map size must equal land size"
> return
> if image.nb_color != 1 :
> print "WARNING Material map must be greyscale or indexed"
> return
> if image.palette : m = len(image.palette)/3
> else : m = 256
> if len(materials) < m :
> print "WARNING Material map has more colors than provided materials"
> return
> for i from 0 <= i < m :
> self._add_material(<_Material> (materials[i]))
> pack[i] = (<_Material> (materials[i]))._pack(FACE_TRIANGLE)
> for h from 0 <= h < self._nb_vertex_depth :
> hoffset = h * self._nb_vertex_width
> for w from 0 <= w < self._nb_vertex_width :
> vertex = self._get_vertex(w, h)
> i = image._pixels[hoffset+w]
> vertex.pack = pack[i]
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