Python 0.9.1 as posted in alt.sources

1 files changed, 147 insertions, 0 deletions

diff --git a/demo/sgi/gl_panel/flying/objectdef.py b/demo/sgi/gl_panel/flying/objectdef.py
new file mode 100644
index 0000000..3e96113
--- /dev/null
+++ b/demo/sgi/gl_panel/flying/objectdef.py
@@ -0,0 +1,147 @@
+from math import *
+from objdict import *
+from gl import *
+
+FUZZY = 0.00001
+
+# first try - brute force method (ala M.Overmars...)
+
+def makespinobject (smooth,rot,n,x1,z1,nx1,nz1,x2,z2,nx2,nz2) :
+ object = []
+ dth = 2.0 * pi / float (rot)
+ for i in range (0, n) :
+ for j in range (0, rot) :
+ th = dth * float (j)
+ #
+ if smooth = 1:
+ a1 = th
+ a2 =th+dth
+ else :
+ a1 = th + dth / 2.0
+ a2 = th + dth / 2.0
+ #
+ v0 = (x1[i]*sin(th),x1[i]*cos(th),z1[i])
+ n0 = (nx1[i]*sin(a1),nx1[i]*cos(a1),nz1[i])
+ #
+ v1 = (x1[i]*sin(th+dth),x1[i]*cos(th+dth),z1[i])
+ n1 = (nx1[i]*sin(a2), nx1[i]*cos(a2), nz1[i])
+ #
+ v2 = (x2[i]*sin(th+dth),x2[i]*cos(th+dth),z2[i])
+ n2 = (nx2[i]*sin(a2), nx2[i]*cos(a2), nz2[i])
+ #
+ v3 = (x2[i]*sin(th), x2[i]*cos(th), z2[i])
+ n3 = (nx2[i]*sin(a1), nx2[i]*cos(a1), nz2[i])
+ #
+ patch = ((v0,n0), (v1,n1), (v2,n2), (v3,n3))
+ #patch = ((n0,v0), (n1,v1), (n2,v2), (n3,v3))
+ #
+ if x1[i] < FUZZY :
+ patch = patch[1:]
+ #
+ object.append (patch)
+ #
+ return object
+
+def makesphere (n):
+ asin = []
+ acos = []
+ for i in range (0, n-1):
+ asin.append (sin((pi/float (n))*(1.0+float (i))))
+ acos.append(cos((pi/float (n))*(1.0+float (i))))
+ #
+ x1 = [0.0] + asin
+ z1 = [1.0] + acos
+ nx1 = [0.0] + asin
+ nz1 = [1.0] + acos
+ #
+ x2 = asin + [0.0]
+ z2 = acos + [-1.0]
+ nx2 = asin + [0.0]
+ nz2 = acos + [-1.0]
+ #
+ return makespinobject (1,2*n,n,x1,z1,nx1,nz1,x2,z2,nx2,nz2)
+
+def makecylinder(n) :
+ x1 = [0.0, 1.0, 1.0]
+ nx1 = [0.0, 1.0, 0.0]
+ z1 = [1.0, 1.0, -1.0]
+ nz1 = [1.0, 0.0, -1.0]
+ #
+ z2 = [1.0, -1.0, -1.0]
+ nz2 = [1.0, 0.0, -1.0]
+ x2 = [1.0, 1.0, 0.0]
+ nx2 = [0.0, 1.0, 0.0]
+ #
+ return makespinobject(1,2*n,3,x1,z1,nx1,nz1,x2,z2,nx2,nz2)
+
+def makecone(n) :
+ x1 = [0.0, 1.0, 1.0]
+ nx1 = [2.0/sqrt(5.0), 0.0, 0.0]
+ z1 = [1.0, -1.0, -1.0]
+ nz1 = [1.0/sqrt(5.0), -1.0, -1.0]
+ #
+ x2 = [1.0, 0.0, 0.0]
+ nx2 = [2.0/sqrt(5.0), 0.0, 0.0]
+ nz2 = [1.0/sqrt(5.0), -1.0, -1.0]
+ z2 = [-1.0, -1.0, -1.0]
+ #
+ return makespinobject(1,2*n,2,x1,z1,nx1,nz1,x2,z2,nx2,nz2)
+
+def makecube() :
+ x1 = [0.0, sqrt(2.0), sqrt (2.0)]
+ nx1 = [0.0, 1.0, 0.0]
+ z1 = [1.0, 1.0, -1.0]
+ nz1 = [1.0, 0.0, -1.0]
+ #
+ x2 = [sqrt(2.0), sqrt(2.0), 0.0]
+ nx2 = [0.0, 1.0, 0.0]
+ z2 = [1.0, -1.0, -1.0]
+ nz2 = [1.0, 0.0, -1.0]
+ #
+ return makespinobject(0,4,3,x1,z1,nx1,nz1,x2,z2,nx2,nz2)
+
+
+def makepyramid() :
+ x1 = [0.0, sqrt(2.0), 0.0]
+ nx1 = [2.0 / sqrt(5.0), 0.0, 0.0]
+ z1 = [1.0, -1.0, 0.0]
+ nz1 = [1.0 / sqrt(5.0), -1.0, 0.0]
+ #
+ x2 = [sqrt(2.0), 0.0, 0.0]
+ nx2 = [2.0 / sqrt(5.0), 0.0, 0.0]
+ z2 = [-1.0, -1.0, -1.0]
+ nz2 = [1.0/sqrt(5.0), -1.0, 0.0]
+ #
+ return makespinobject(0,4,3,x1,z1,nx1,nz1,x2,z2,nx2,nz2)
+
+def makeobjects () :
+ cube = makecube()
+ sphere = makesphere (6)
+ cylinder = makecylinder (6)
+ cone = makecone (6)
+ pyramid = makepyramid ()
+ #
+ odict = {}
+ odict ['cube'] = cube
+ odict ['pyramid'] = pyramid
+ odict ['sphere'] = sphere
+ odict ['cylinder'] = cylinder
+ odict ['cone'] = cone
+ odict ['diamond'] = cube
+ odict ['disk'] = sphere
+ #
+ return odict
+
+
+renderfuncs = [bgnpolygon, endpolygon]
+
+def putFunc (funcs) :
+ renderfuncs [:] = funcs
+
+def drawobject (obj) :
+ #
+ for patch in obj :
+ renderfuncs[0] ()
+ vnarray (patch)
+ renderfuncs[1] ()
+