SetPixel() for 32 bit float images
owen last edited by owen
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.
bitmap = c4d.bitmaps.BaseBitmap() if bitmap is None: return # 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: return # 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) c4d.bitmaps.ShowBitmap(bitmap)
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owen last edited by
Thanks so much this is exactly what I was looking for.