ShaderLib2D.md

@@ -5,8 +5,14 @@ from sverchok.utils.modules.shader_utils import ShaderLib2D
 
 
 canvas = ShaderLib2D()
-canvas.add_rect(x, y, w, h, (1.0, 1.0, 1.0))
-...
+
+# add a rectangle of W * H  at X, Y, with a solid rgb (3-tuple) of 
+canvas.add_rect(x, y, w, h, rgb_color)
+
+# for more specific drawing need you can generate your own verts, colors and face indices
+# and add them to the total geom this way
+canvas.add_data(verts, colors, indices)
+
 geom = canvas.compile()
 verts = geom.verts
 tris = geom.tris