Center the machine bed grid on the machine center, so it is easier to judge scale...

diff --git a/Cura/gui/util/opengl.py b/Cura/gui/util/opengl.py
index 4db99fdb077aaa8e41890118421407a99dff0639..18234c586aa951c45115af9164cc34a5fad01749 100644 (file)
--- a/Cura/gui/util/opengl.py
+++ b/Cura/gui/util/opengl.py
@@ -121,36 +121,30 @@ def DrawMachine(machineSize):
                glDisable(GL_CULL_FACE)
                glEnable(GL_BLEND)
                glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
-               glColor4ub(5, 171, 231, 127)
-               glBegin(GL_QUADS)
-               for x in xrange(0, int(machineSize.x), 20):
-                       for y in xrange(0, int(machineSize.y), 20):
-                               glVertex3f(x, y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), min(y + 10, machineSize.y), -0.01)
-                               glVertex3f(x, min(y + 10, machineSize.y), -0.01)
-               for x in xrange(10, int(machineSize.x), 20):
-                       for y in xrange(10, int(machineSize.y), 20):
-                               glVertex3f(x, y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), min(y + 10, machineSize.y), -0.01)
-                               glVertex3f(x, min(y + 10, machineSize.y), -0.01)
-               glEnd()
-               glColor4ub(5 * 8 / 10, 171 * 8 / 10, 231 * 8 / 10, 128)
-               glBegin(GL_QUADS)
-               for x in xrange(10, int(machineSize.x), 20):
-                       for y in xrange(0, int(machineSize.y), 20):
-                               glVertex3f(x, y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), min(y + 10, machineSize.y), -0.01)
-                               glVertex3f(x, min(y + 10, machineSize.y), -0.01)
-               for x in xrange(0, int(machineSize.x), 20):
-                       for y in xrange(10, int(machineSize.y), 20):
-                               glVertex3f(x, y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), y, -0.01)
-                               glVertex3f(min(x + 10, machineSize.x), min(y + 10, machineSize.y), -0.01)
-                               glVertex3f(x, min(y + 10, machineSize.y), -0.01)
-               glEnd()
+
+               sx = machineSize.x
+               sy = machineSize.y
+               for x in xrange(-int(sx/20)-1, int(sx / 20) + 1):
+                       for y in xrange(-int(sx/20)-1, int(sy / 20) + 1):
+                               x1 = sx/2+x * 10
+                               x2 = x1 + 10
+                               y1 = sx/2+y * 10
+                               y2 = y1 + 10
+                               x1 = max(min(x1, sx), 0)
+                               y1 = max(min(y1, sy), 0)
+                               x2 = max(min(x2, sx), 0)
+                               y2 = max(min(y2, sy), 0)
+                               if (x & 1) == (y & 1):
+                                       glColor4ub(5, 171, 231, 127)
+                               else:
+                                       glColor4ub(5 * 8 / 10, 171 * 8 / 10, 231 * 8 / 10, 128)
+                               glBegin(GL_QUADS)
+                               glVertex3f(x1, y1, -0.01)
+                               glVertex3f(x2, y1, -0.01)
+                               glVertex3f(x2, y2, -0.01)
+                               glVertex3f(x1, y2, -0.01)
+                               glEnd()
+
                glEnable(GL_CULL_FACE)
 
                glColor4ub(5, 171, 231, 64)