From: daid303 <daid303@gmail.com>
Date: Thu, 20 Dec 2012 09:02:43 +0000 (+0100)
Subject: Center the machine bed grid on the machine center, so it is easier to judge scale... 
X-Git-Tag: 13.03~148
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=2a4d2a94e1ba62d3ea6367fa3dd8fbadd0707ede;p=cura.git

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

diff --git a/Cura/gui/util/opengl.py b/Cura/gui/util/opengl.py
index 4db99fdb..18234c58 100644
--- 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)