The example ray, shown differently, hits the red sphere, so its pixel
would be coloured red."""
import visual as vis
MID_GREY = (0.5,0.5,0.5)
LIGHT_GREY = (0.7,0.7,0.7)
YELLOW = (0.7,0.7,0.1)
BLACK = (0,0,0)
PIXELS = 5 # num pixels across and down
SPACING = 1.0 / PIXELS
SPECIAL_PIXEL = (3,1) # Highlight this one
# Draw the viewplane grid
for t in vis.arange(0, 1.0001, SPACING):
vis.curve(pos=[(0, t, 1), (1,t,1)], color = MID_GREY)
vis.curve(pos=[(t,0,1), (t,1,1)], color = MID_GREY)
# Draw the eyepoint
eye = vis.vector(0.5, 0.5, 2)
#vis.label(pos=eye,text="Eye", xoffset=-10)
vis.sphere(pos=eye, color=BLACK, radius=0.02)
# Draw the scene
vis.sphere(pos=(0.35,0.6,0.5), radius=0.25, material=vis.materials.wood)
vis.sphere(pos=(0.75,0.2,0.6), radius=0.15, color=vis.color.red, material=vis.materials.plastic)
vis.box(pos=(0.5,0,0.5),height=0.001, color=vis.color.green)
# David Scherer
vp.scene.title = "Drape"
RESTLENGTH = 0.02
M = 0.010 * RESTLENGTH
G = 9.8
DT = 0.002
K = 3
DAMP = (1-0)**DT
NSPHERES = 3
FLOOR = 0
# Create the stringy thing:
BAND = vp.curve(
x=vp.arange(-1, 1, RESTLENGTH),
y=1,
radius=0.02
)
BAND.p = BAND.pos * 0
vp.scene.range = 1.5
vp.scene.autoscale = 0
# Let the user position obstacles:
SPHERES = []
for i in range(NSPHERES):
S = vp.sphere(pos=vp.scene.mouse.getclick().pos, #(i*0.6 - 0.7, 0.5 + i*0.1, 0),
radius=0.25,
color=(abs(vp.sin(i)), vp.cos(i)**2, (i%10)/10.0))
from random import uniform
print(__doc__)
# David Scherer
vp.scene.range = 3
PI = vp.pi
A = vp.convex(color=(0.5, 0, 0))
B = vp.convex(color=(0, 0.5, 0))
C = vp.convex(color=(0, 0, 0.5))
D = vp.convex(color=(0.5, 0, 0.5))
E = vp.convex(color=(0.5, 0.5, 0))
F = vp.convex(color=(0, 0.5, 0.5))
# circle
T = vp.arange(0, 2*PI, 0.1)
E.pos = vp.transpose((vp.sin(T), vp.cos(T)+2, 0*T))
# triangle
T = vp.arange(0, 2*PI, 2*PI/3)
F.pos = vp.transpose((vp.sin(T)-2, vp.cos(T)+2, 0*T))
# disk
for T in vp.arange(0, 2*PI, 0.1):
A.append(pos=(vp.cos(T), 0, vp.sin(T)))
A.append(pos=(vp.cos(T), 0.2, vp.sin(T)))
# box
for i in range(8):
P = vp.vector((i/4)%2 - 2.5, (i/2)%2 - 0.5, (i)%2 - 0.5)
B.append(pos=P)
from random import uniform
print(__doc__)
# David Scherer
vp.scene.range = 3
PI = vp.pi
A = vp.convex(color=(0.5, 0, 0))
B = vp.convex(color=(0, 0.5, 0))
C = vp.convex(color=(0, 0, 0.5))
D = vp.convex(color=(0.5, 0, 0.5))
E = vp.convex(color=(0.5, 0.5, 0))
F = vp.convex(color=(0, 0.5, 0.5))
# circle
T = vp.arange(0, 2 * PI, 0.1)
E.pos = vp.transpose((vp.sin(T), vp.cos(T) + 2, 0 * T))
# triangle
T = vp.arange(0, 2 * PI, 2 * PI / 3)
F.pos = vp.transpose((vp.sin(T) - 2, vp.cos(T) + 2, 0 * T))
# disk
for T in vp.arange(0, 2 * PI, 0.1):
A.append(pos=(vp.cos(T), 0, vp.sin(T)))
A.append(pos=(vp.cos(T), 0.2, vp.sin(T)))
# box
for i in range(8):
P = vp.vector((i / 4) % 2 - 2.5, (i / 2) % 2 - 0.5, (i) % 2 - 0.5)
B.append(pos=P)
print(__doc__)
# David Scherer
vp.scene.title = "Drape"
RESTLENGTH = 0.02
M = 0.010 * RESTLENGTH
G = 9.8
DT = 0.002
K = 3
DAMP = (1 - 0)**DT
NSPHERES = 3
FLOOR = 0
# Create the stringy thing:
BAND = vp.curve(x=vp.arange(-1, 1, RESTLENGTH), y=1, radius=0.02)
BAND.p = BAND.pos * 0
vp.scene.range = 1.5
vp.scene.autoscale = 0
# Let the user position obstacles:
SPHERES = []
for i in range(NSPHERES):
S = vp.sphere(
pos=vp.scene.mouse.getclick().pos, #(i*0.6 - 0.7, 0.5 + i*0.1, 0),
radius=0.25,
color=(abs(vp.sin(i)), vp.cos(i)**2, (i % 10) / 10.0))
SPHERES.append(S)
