new opengl demo

examples.py/Library/OpenGL/Esfera/Esfera.py

@@ -0,0 +1,75 @@
+"""
+ * Esfera
+ * by David Pena. (Adapted to Python by Jonathan Feinberg)    
+ * 
+ * Distribucion aleatoria uniforme sobre la superficie de una esfera. 
+"""
+
+# Too slow for original 8000.
+cuantos = 4000
+
+class pelo:
+    def __init__(self):
+        self.z = random(-radio, radio)
+        self.phi = random(TWO_PI)
+        self.largo = random(1.15, 1.2)
+        self.theta = asin(self.z / radio)
+
+    def dibujar(self):
+        off = (noise(millis() * 0.0005, sin(self.phi)) - 0.5) * 0.3
+        offb = (noise(millis() * 0.0007, sin(self.z) * 0.01) - 0.5) * 0.3
+
+        thetaff = self.theta + off
+        phff = self.phi + offb
+        x = radio * cos(self.theta) * cos(self.phi)
+        y = radio * cos(self.theta) * sin(self.phi)
+        z = radio * sin(self.theta)
+        msx = screenX(x, y, z)
+        msy = screenY(x, y, z)
+
+        xo = radio * cos(thetaff) * cos(phff)
+        yo = radio * cos(thetaff) * sin(phff)
+        zo = radio * sin(thetaff)
+
+        xb = xo * self.largo
+        yb = yo * self.largo
+        zb = zo * self.largo
+
+        beginShape(LINES)
+        stroke(0)
+        vertex(x, y, z)
+        stroke(200, 150)
+        vertex(xb, yb, zb)
+        endShape()
+
+def setup():
+    size(1024, 768, OPENGL)
+    global radio, lista, rx, ry
+    radio = height / 3.5
+    lista = [pelo() for i in range(cuantos)]
+    rx, ry = 0.0, 0.0
+    noiseDetail(3)
+
+def draw():
+    background(0)
+    translate(width / 2, height / 2)
+
+    rxp = ((mouseX - (width / 2)) * 0.005)
+    ryp = ((mouseY - (height / 2)) * 0.005)
+    global rx, ry
+    rx = (rx * 0.9) + (rxp * 0.1)
+    ry = (ry * 0.9) + (ryp * 0.1)
+    rotateY(rx)
+    rotateX(ry)
+    fill(0)
+    noStroke()
+    sphere(radio)
+
+    for p in lista:
+        p.dibujar()
+
+
+
+
+
+