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tools/editortool/map/selectbox.py

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+import OpenGL.GL as gl
+from dusk.defs import defs
+import colorsys
+
+hue = [0.0]  # Mutable container for static hue
+
+def drawSelectBox(x, y, z):
+  w = float(defs.get('TILE_WIDTH'))
+  h = float(defs.get('TILE_HEIGHT'))
+  d = float(defs.get('TILE_DEPTH'))
+
+  x = x * w
+  y = y * h
+  z = z * d
+
+  # Center box.
+  x -= w / 2.0
+  y -= h / 2.0
+  z -= d / 2.0
+
+  # Define the 8 vertices of the cube with w=h=d=1
+  vertices = [
+    (x,     y,     z),      # 0: min corner
+    (x+w,   y,     z),      # 1
+    (x+w,   y+h,   z),      # 2
+    (x,     y+h,   z),      # 3
+    (x,     y,     z+d),    # 4
+    (x+w,   y,     z+d),    # 5
+    (x+w,   y+h,   z+d),    # 6
+    (x,     y+h,   z+d)     # 7
+  ]
+  # List of edges as pairs of vertex indices
+  edges = [
+    (0, 1), (1, 2), (2, 3), (3, 0),  # bottom face
+    (4, 5), (5, 6), (6, 7), (7, 4),  # top face
+    (0, 4), (1, 5), (2, 6), (3, 7)   # vertical edges
+  ]
+
+  # Cycle hue
+  hue[0] = (hue[0] + 0.01) % 1.0
+  r, g, b = colorsys.hsv_to_rgb(hue[0], 1.0, 1.0)
+  gl.glColor3f(r, g, b)
+  gl.glLineWidth(2.0)
+  gl.glBegin(gl.GL_LINES)
+  for edge in edges:
+    for vertex in edge:
+        gl.glVertex3f(*vertices[vertex])
+  gl.glEnd()