In the class c4d.bitmaps.BaseBitmap you can call BaseBitmap.SetPixel() to set the color value of an individual pixel. It seems like it only takes in values between 0 and 255 for RGB. I'm working with MultipassBitmap to create a 32 bit float image and want to be able to modify the individual pixels. Is there a similar way to change the pixel values so I could feed it a value between 0 and 1?
you can write 32bit data into a BaseBitmap using SetPixelCnt(). This function allows to write a block of data into the bitmap.
You find example code showing how to use SetPixelCnt() in the documentation, on GitHub or here:
bitmap = c4d.bitmaps.BaseBitmap()
if bitmap is None:
# define bitmap dimensions and bit depth
width = 100
height = 100
pixelBytes = c4d.COLORBYTES_RGBf # RGBf format
pixelBits = pixelBytes * 8
# initialize the BaseBitmap with the given dimensions and bit depth
res = bitmap.Init(width, height, pixelBits)
if res != c4d.IMAGERESULT_OK:
# allocate memory for one line
bufferSize = pixelBytes * width
lineBuffer = storage.ByteSeq(None, bufferSize)
# loop through all lines
for y in xrange(height):
# shade of red based on the position
red = float(y) / float(height)
offset = 0
for x in xrange(width):
# shade of green based on the position
green = float(x) / float(width)
# fill buffer
lineBuffer[offset + 0:offset + 4] = struct.pack("f",red)
lineBuffer[offset + 4:offset + 8] = struct.pack("f", green)
lineBuffer[offset + 8:offset + 12] = struct.pack("f", 0.0)
offset = offset + pixelBytes
# write full line into the bitmap
bitmap.SetPixelCnt(0, y, width, lineBuffer.GetOffset(0), pixelBytes, c4d.COLORMODE_RGBf, c4d.PIXELCNT_0)
As always, please add tags to your post.
Thanks so much this is exactly what I was looking for.