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tommGL.py
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import numpy as np
from math import floor
from bitmap import Bitmap
class Color:
def __init__(self, r, g, b, a=None, data_type=np.uint8):
self.r = r
self.g = g
self.b = b
self.a = a
self.data_type = data_type
def has_alpha(self):
if self.a is None:
return False
else:
return True
def line(x0, y0, x1, y1, image: Bitmap, color):
steep = False
if abs(x0-x1) < abs(y0-y1):
x0, y0 = y0, x0
x1, y1 = y1, x1
steep = True
if x0 > x1:
x0, x1 = x1, x0
y0, y1 = y1, y0
dx = x1 - x0
dy = y1 - y0
d_error = abs(dy)*2
error = 0
y = y0
for x in range(x0, x1+1):
if steep:
image.set_rgb_pixel(y, x, color.r, color.g, color.b)
else:
image.set_rgb_pixel(x, y, color.r, color.g, color.b)
error += d_error
if error > dx:
y += 1 if y1 > y0 else -1
error -= dx * 2
def line_a(x0, y0, x1, y1, image: Bitmap, color):
def plot(x, y, c):
r = color.r * c
g = color.g * c
b = color.b * c
image.set_rgb_pixel(int(x), int(y), int(r), int(g), int(b))
def i_part(n):
return floor(n)
def rounded(n):
return i_part(n + 0.5)
def f_part(n):
return n - floor(n)
def rf_part(n):
return 1 - f_part(n)
steep = False
if abs(x0 - x1) < abs(y0 - y1):
x0, y0 = y0, x0
x1, y1 = y1, x1
steep = True
if x0 > x1:
x0, x1 = x1, x0
y0, y1 = y1, y0
dx = x1 - x0
dy = y1 - y0
gradient = dy / dx
if dx == 0:
gradient = 1
x_end = round(x0)
y_end = y0 + gradient * (x_end - x0)
x_gap = rf_part(x0 + 0.5)
x_pxl1 = x_end
y_pxl1 = i_part(y_end)
if steep:
plot(y_pxl1, x_pxl1, rf_part(y_end) * x_gap)
plot(y_pxl1 + 1, x_pxl1, f_part(y_end) * x_gap)
else:
plot(x_pxl1, y_pxl1, rf_part(y_end) * x_gap)
plot(x_pxl1, y_pxl1 + 1, f_part(y_end) * x_gap)
intery = y_end + gradient
x_end = rounded(x1)
y_end = y1 + gradient * (x_end - x1)
x_gap = f_part(x1 + 0.5)
x_pxl2 = x_end
y_pxl2 = i_part(y_end)
if steep:
plot(y_pxl2, x_pxl2, rf_part(y_end) * x_gap)
plot(y_pxl2 + 1, x_pxl2, f_part(y_end) * x_gap)
else:
plot(x_pxl2, y_pxl2, rf_part(y_end) * x_gap)
plot(x_pxl2, y_pxl2 + 1, f_part(y_end) * x_gap)
if steep:
for _x in range(int(x_pxl1 + 1), int(x_pxl2)):
plot(i_part(intery), _x, rf_part(intery))
plot(i_part(intery) + 1, _x, f_part(intery))
intery = intery + gradient
else:
for _x in range(int(x_pxl1 + 1), int(x_pxl2)):
plot(_x, i_part(intery), rf_part(intery))
plot(_x, i_part(intery) + 1, f_part(intery))
intery = intery + gradient
def triangle_shape(x0, y0, x1, y1, x2, y2, image: Bitmap, color):
line(x0, y0, x1, y1, image, color)
line(x0, y0, x2, y2, image, color)
line(x2, y2, x1, y1, image, color)
def triangle_a_shape(x0, y0, x1, y1, x2, y2, image: Bitmap, color):
line_a(x0, y0, x1, y1, image, color)
line_a(x0, y0, x2, y2, image, color)
line_a(x2, y2, x1, y1, image, color)
if __name__ == "__main__":
from timeit import default_timer as timer
from datetime import datetime as dt
h = 256
w = 256
im = Bitmap(w, h)
line_a(10, 10, 150, 30, im, Color(255, 255, 0))
line(10, 20, 150, 40, im, Color(255, 255, 0))
triangle_shape(150, 150, 200, 80, 95, 123, im, Color(255, 255, 0))
triangle_a_shape(120, 120, 170, 50, 65, 93, im, Color(255, 255, 0))
path = "images/im_" + dt.now().strftime("%Y-%m-%d_%H:%M:%S") + ".png"
print("Image saved: " + path)
im.save_as_png(path)