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June 24, 2022 09:33
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Draws a sphere with a texture.
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from pyglet.gl import * | |
from math import * | |
tex = pyglet.image.load('biosphere.png').get_texture() | |
step = 10 | |
vlists = [] | |
for lat in range(-90,90,step): | |
verts = [] | |
texc = [] | |
for lon in range(-180,181,step): | |
x = -cos(radians(lat)) * cos(radians(lon)) | |
y = sin(radians(lat)) | |
z = cos(radians(lat)) * sin(radians(lon)) | |
s = (lon+180) / 360.0 | |
t = (lat+90) / 180.0 | |
verts += [x,y,z] | |
texc += [s,t] | |
x = -cos(radians((lat+step))) * cos(radians(lon)) | |
y = sin(radians((lat+step))) | |
z = cos(radians((lat+step))) * sin(radians(lon)) | |
s = (lon+180) / 360.0 | |
t = ((lat+step)+90) / 180.0 | |
verts += [x,y,z] | |
texc += [s,t] | |
vlist = pyglet.graphics.vertex_list(int(len(verts)/3), ('v3f', verts), ('t2f', texc)) | |
vlists.append(vlist) | |
window = pyglet.window.Window(1024,512) | |
angle = 0 | |
glEnable(GL_DEPTH_TEST) | |
@window.event | |
def on_draw(): | |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) | |
glMatrixMode(GL_PROJECTION) | |
glLoadIdentity() | |
glOrtho(-2,2,-1,1,-1,1) | |
glMatrixMode(GL_MODELVIEW) | |
glLoadIdentity() | |
glRotatef(angle, 0, 1, 0) | |
glColor3f(1,1,1) | |
glEnable(GL_TEXTURE_2D) | |
glBindTexture(GL_TEXTURE_2D, tex.id) | |
for v in vlists: | |
v.draw(GL_TRIANGLE_STRIP) | |
def update(dt): | |
global angle | |
angle = angle + 1 | |
pyglet.clock.schedule_interval(update,1/60.0) | |
pyglet.app.run() |
"int()" change made. Note that this code was written for Python 2, and the int() is only needed for Python 3 - the point being, I don't know if there are any other such Python3-related bugs lurking; I haven't used this code in many years.
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line 27 needs change: from "len(verts)/3" to "int(len(verts)/3)"