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--- numbers:graphics [2012/11/01 11:26]
127.0.0.1 editor externo
+++ numbers:graphics [2020/05/09 09:25] (actual)
@@ Línea 283: / Línea 283: @@
   * [[http://freespace.virgin.net/hugo.elias/models/m_perlin.htm]]
   * [[http://devmag.org.za/articles/48-HOW-TO-USE-PERLIN-NOISE-IN-YOUR-GAMES/2/#top1]]
+===== Ecuaciones de formas =====
+==== Elipse ====
+<code python>
+import pygame
+from pygame.locals import *
+import sys
+import math
+w = 640
+h = 489
+screen = pygame.display.set_mode((w,h))
+sampling = 50
+r1 = 100
+r2 = 160
+def drawPoint (x,y, c=(255,0,0)):
+	centX = w/2
+	centY = h/2
+	nx = centX + x
+	ny = centY + y
+	pygame.draw.circle(screen, c, (int(nx), int(ny)), 1)
+for i in range(sampling):
+	theta = i * (2. * 3.1421)/sampling
+	cosTheta = math.cos(theta)
+	sinTheta = math.sin(theta)
+	tmp1 = (cosTheta*cosTheta)/(r2*r2)
+	tmp2 = (sinTheta * sinTheta)/(r1*r1)
+	tmp = math.sqrt(tmp1+tmp2)
+	drawPoint(cosTheta/tmp, sinTheta/tmp)
+pygame.display.flip()
+while True:
+    for event in pygame.event.get():
+        if event.type == QUIT:
+            sys.exit()
+    pygame.display.update()
+</code>

Programming