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update tolvera/draw/ruler.py #4

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update tolvera/draw/ruler.py #4

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23 changes: 17 additions & 6 deletions tolvera/draw/ruler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,8 @@

def np_txt(text:str, w:int, h=None, x=0, y=0, size=None, color:str="#000000"):
if h is None: h=w
font = 'Arial.otf'
# replace font path with your own
font = "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf"
font_size = size if size is not None else min(w,h)//(len(text)/2)
pil_font = ImageFont.truetype(font, size=font_size, encoding="unic")
bbox = pil_font.getbbox(text)
Expand Down Expand Up @@ -46,6 +47,7 @@ def __init__(self,
self.end = ti.math.vec2(*end)
self.domain = ti.math.vec2(*domain)
self.rgba = [1.,1.,1.,1.]
self.axis = 1 if end[1] > end[0] else -1 # 1 for +y axis and -1 for +x axis
self.create_tick_labels()

def create_tick_labels(self):
Expand All @@ -58,21 +60,30 @@ def create_tick_labels(self):
self.tick_labels.append(txt)

@ti.kernel
def draw(self):
def draw_lines(self):
self.tv.px.line(self.start[0], self.start[1], self.end[0], self.end[1], ti.Vector(self.rgba))
for i in ti.static(range(self.ticks)):
l = self.tick_len
x = self.start[0] + (self.end[0] - self.start[0]) * (i+1) / self.ticks
y = self.start[1] + (self.end[1] - self.start[1]) * (i+1) / self.ticks
self.tv.px.line(x, y, x - l, y, ti.Vector(self.rgba))
self.tv.px.stamp(x - l, y, self.tick_labels[i])
if self.axis == 1:
self.tv.px.line(x, y, x+l, y, ti.Vector(self.rgba))
elif self.axis == -1:
self.tv.px.line(x, y, x, y+l, ti.Vector(self.rgba))

def draw_labels(self):
for i in range(self.ticks):
l = self.tick_len
x = int(self.start[0] + (self.end[0] - self.start[0]) * (i+1) / self.ticks)
y = int(self.start[1] + (self.end[1] - self.start[1]) * (i+1) / self.ticks)
self.tv.px.stamp(x-l, y, self.tick_labels[i])

def __call__(self):
self.draw()
self.draw_lines()
self.draw_labels()

def main(**kwargs):
tv = Tolvera(**kwargs)
txt = text(tv, "Tölvera", tv.x, tv.y)
x = Ruler(tv, start=(500,500), end=(500, 1000))
y = Ruler(tv, start=(500,500), end=(1000, 500))

Expand Down