Matt Low
c313b3e8ba
- Move all pygame draw calls into draw module - Scrap indvidual shape modules for single 'geom' module - Center of screen is now 0,0
30 lines
850 B
Python
30 lines
850 B
Python
from .. import HEIGHT, WIDTH, get_cursor_pos
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from ..colors import *
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from ..math import *
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from ..draw import *
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class VecProj:
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title = "Vector Projection"
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def render(self, surface):
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x1 = -(WIDTH / 4)
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y1 = 100
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x2 = WIDTH / 4
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y2 = 0
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cx, cy = get_cursor_pos()
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lx, ly = x2 - x1, y2 - y1 # line vector
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llen = length(lx, ly)
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lnx, lny = lx / llen, ly / llen # line normal
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lcx, lcy = cx - x1, cy - y1 # line start - cursor vector
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proj = dot(lcx, lcy, lx, ly) / llen
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nearest_point = add(x1, y1, *scale(lnx, lny, proj))
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line(surface, GREEN, (cx, cy), nearest_point, 5)
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line(surface, WHITE, (cx, cy), (x1, y1), 5)
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line(surface, YELLOW, (x1, y1), (x2, y2), 5)
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line(surface, RED, (x1, y1), nearest_point, 5)
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