Data commit

Task/Draw-a-rotating-cube/EasyLang/draw-a-rotating-cube.easy

@@ -0,0 +1,66 @@
+node[][] = [ [ -1 -1 -1 ] [ -1 -1 1 ] [ -1 1 -1 ] [ -1 1 1 ] [ 1 -1 -1 ] [ 1 -1 1 ] [ 1 1 -1 ] [ 1 1 1 ] ]
+edge[][] = [ [ 1 2 ] [ 2 4 ] [ 4 3 ] [ 3 1 ] [ 5 6 ] [ 6 8 ] [ 8 7 ] [ 7 5 ] [ 1 5 ] [ 2 6 ] [ 3 7 ] [ 4 8 ] ]
+#
+proc scale f . .
+   for i = 1 to len node[][]
+      for d = 1 to 3
+         node[i][d] *= f
+      .
+   .
+.
+proc rotate angx angy . .
+   sinx = sin angx
+   cosx = cos angx
+   siny = sin angy
+   cosy = cos angy
+   for i = 1 to len node[][]
+      x = node[i][1]
+      z = node[i][3]
+      node[i][1] = x * cosx - z * sinx
+      y = node[i][2]
+      z = z * cosx + x * sinx
+      node[i][2] = y * cosy - z * siny
+      node[i][3] = z * cosy + y * siny
+   .
+.
+len nd[] 3
+proc draw . .
+   clear
+   m = 999
+   mi = -1
+   for i = 1 to len node[][]
+      if node[i][3] < m
+         m = node[i][3]
+         mi = i
+      .
+   .
+   ix = 1
+   for i = 1 to len edge[][]
+      if edge[i][1] = mi
+         nd[ix] = edge[i][2]
+         ix += 1
+      elif edge[i][2] = mi
+         nd[ix] = edge[i][1]
+         ix += 1
+      .
+   .
+   for ni = 1 to len nd[]
+      for i = 1 to len edge[][]
+         if edge[i][1] = nd[ni] or edge[i][2] = nd[ni]
+            x1 = node[edge[i][1]][1]
+            y1 = node[edge[i][1]][2]
+            x2 = node[edge[i][2]][1]
+            y2 = node[edge[i][2]][2]
+            move x1 + 50 y1 + 50
+            line x2 + 50 y2 + 50
+         .
+      .
+   .
+.
+call scale 25
+call rotate 45 atan sqrt 2
+call draw
+on animate
+   call rotate 1 0
+   call draw
+.