def bilerp(im, p):
minX = floor(p[0])
minY = floor(p[1])
maxX = minX + 1
maxY = minY + 1
fracX = frac(p[0])
fracY = frac(p[1])
ll = im(float2(minX, minY))
lr = im(float2(maxX, minY))
ul = im(float2(minX, maxY))
ur = im(float2(maxX, maxY))
return lerp(lerp(ll, lr, fracX), lerp(ul, ur, fracX), fracY)
def bilerp(im, p):
minX = floor(p[0])
minY = floor(p[1])
maxX = minX+1
maxY = minY+1
fracX = frac(p[0])
fracY = frac(p[1])
ll = im(float2(minX, minY))
lr = im(float2(maxX, minY))
ul = im(float2(minX, maxY))
ur = im(float2(maxX, maxY))
return lerp(lerp(ll, lr, fracX),
lerp(ul, ur, fracX),
fracY)
def half(im=RGBImage, p=Position):
return im(p*float2(2,2))