Remove grid pattern

It'll be replaced by grid lines instead of grid surfaces.

Contributes to issue CURA-4150.

cura/BuildVolume.py

@@ -169,8 +169,7 @@ class BuildVolume(SceneNode):
             self._shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "default.shader"))
             self._grid_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "grid.shader"))
             theme = Application.getInstance().getTheme()
-            self._grid_shader.setUniformValue("u_gridColor0", Color(*theme.getColor("buildplate").getRgb()))
-            self._grid_shader.setUniformValue("u_gridColor1", Color(*theme.getColor("buildplate_alt").getRgb()))
+            self._grid_shader.setUniformValue("u_buildplateColor", Color(*theme.getColor("buildplate").getRgb()))
 
         renderer.queueNode(self, mode = RenderBatch.RenderMode.Lines)
         renderer.queueNode(self, mesh = self._origin_mesh)

resources/shaders/grid.shader

@@ -14,17 +14,12 @@ vertex =
     }
 
 fragment =
-    uniform lowp vec4 u_gridColor0;
-    uniform lowp vec4 u_gridColor1;
-
+    uniform lowp vec4 u_buildplateColor;
     varying lowp vec2 v_uvs;
 
     void main()
     {
-        if (mod(floor(v_uvs.x / 10.0) - floor(v_uvs.y / 10.0), 2.0) < 1.0)
-            gl_FragColor = u_gridColor0;
-        else
-            gl_FragColor = u_gridColor1;
+        gl_FragColor = u_buildplateColor;
     }
 
 vertex41core =
@@ -44,23 +39,17 @@ vertex41core =
 
 fragment41core =
     #version 410
-    uniform lowp vec4 u_gridColor0;
-    uniform lowp vec4 u_gridColor1;
-
+    uniform lowp vec4 u_buildplateColor;
     in lowp vec2 v_uvs;
     out vec4 frag_color;
 
     void main()
     {
-        if (mod(floor(v_uvs.x / 10.0) - floor(v_uvs.y / 10.0), 2.0) < 1.0)
-            frag_color = u_gridColor0;
-        else
-            frag_color = u_gridColor1;
+        gl_FragColor = u_buildplateColor;
     }
 
 [defaults]
-u_gridColor0 = [0.96, 0.96, 0.96, 1.0]
-u_gridColor1 = [0.8, 0.8, 0.8, 1.0]
+u_buildplateColor = [0.96, 0.96, 0.96, 1.0]
 
 [bindings]
 u_modelViewProjectionMatrix = model_view_projection_matrix