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Fixed projectiles distance?
This commit is contained in:
unknown 2015-10-10 01:45:41 -07:00
parent d4608d8f39
commit 0a1ed033f9
2 changed files with 18 additions and 14 deletions
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26
ProjectileParabola/projectileparabola.py
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@ -32,9 +32,8 @@ def make_throw(starting_x, starting_y, starting_velocity, thrown_angle):
global smallest_x global smallest_x
global largest_x global largest_x
global largest_y global largest_y
if thrown_angle in range(1, 179, 1) or thrown_angle in range(-181, -359, -1): upward = thrown_angle in range(1, 179, 1) or thrown_angle in range(-181, -359, -1)
# A positive velocity implies a downward motion, so please reverse this. upward = -1 if upward else 1
starting_velocity *= -1
rads = math.radians(thrown_angle) rads = math.radians(thrown_angle)
sin = math.sin(rads) sin = math.sin(rads)
@ -42,10 +41,11 @@ def make_throw(starting_x, starting_y, starting_velocity, thrown_angle):
tan = math.tan(rads) tan = math.tan(rads)
throw = {'angle': thrown_angle} throw = {'angle': thrown_angle}
throw['horizontal_component'] = starting_velocity * cos throw['horizontal_component'] = starting_velocity * cos * -upward
throw['vertical_component'] = starting_velocity * sin throw['vertical_component'] = starting_velocity * sin * upward
#print(thrown_angle, starting_velocity, throw['horizontal_component'])
throw['hang_time'] = time_to_known_distance(throw['vertical_component'], starting_y, acceleration=9.8) throw['hang_time'] = time_to_known_distance(throw['vertical_component'], starting_y, acceleration=9.8)
throw['distance'] = abs(throw['hang_time'] * throw['horizontal_component']) throw['distance'] = throw['hang_time'] * throw['horizontal_component']
def parabola(x): def parabola(x):
# 100% credit goes to wikipedia authors # 100% credit goes to wikipedia authors
@ -113,8 +113,8 @@ PLOT_STEP_X = 5
throws = [] throws = []
angle_increment = 15 angle_increment = 15
angles = [180, 0] angles = [-1, 0, 1]
angles = [x * angle_increment for x in range(int(90 / angle_increment))] #angles = [x * angle_increment for x in range(int(90 / angle_increment))]
#angles += [x+90 for x in angles] #angles += [x+90 for x in angles]
for thrown_angle in (angles): for thrown_angle in (angles):
t = make_throw(STARTING_X, STARTING_Y, STARTING_VELOCITY, thrown_angle) t = make_throw(STARTING_X, STARTING_Y, STARTING_VELOCITY, thrown_angle)
@ -137,13 +137,17 @@ for (index, t) in enumerate(throws):
g = random.randint(0, 200) g = random.randint(0, 200)
b = random.randint(0, 200) b = random.randint(0, 200)
color = (r, g, b, 255) color = (r, g, b, 255)
#print(t['angle'], t['distance']) print(t['angle'], t['distance'])
point_a = None
for pointindex in range(len(t['parabola_points']) - 1): for pointindex in range(len(t['parabola_points']) - 1):
if point_a is None:
point_a = t['parabola_points'][pointindex][:] point_a = t['parabola_points'][pointindex][:]
point_b = t['parabola_points'][pointindex + 1][:]
point_a[0] = (round(point_a[0])) + abs(smallest_x) + PLOT_PAD_LEFT point_a[0] = (round(point_a[0])) + abs(smallest_x) + PLOT_PAD_LEFT
point_b[0] = (round(point_b[0])) + abs(smallest_x) + PLOT_PAD_LEFT
point_a[1] = (largest_y - round(point_a[1])) point_a[1] = (largest_y - round(point_a[1]))
else:
point_a = point_b
point_b = t['parabola_points'][pointindex + 1][:]
point_b[0] = (round(point_b[0])) + abs(smallest_x) + PLOT_PAD_LEFT
point_b[1] = (largest_y - round(point_b[1])) point_b[1] = (largest_y - round(point_b[1]))
try: try:
# this ensures a solid, smooth line between each of the plotted points. # this ensures a solid, smooth line between each of the plotted points.

4
ProjectileParabola/projectiles.png
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@ -1,3 +1,3 @@
version https://git-lfs.github.com/spec/v1 version https://git-lfs.github.com/spec/v1
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size 28876 size 8042