From d1fc7360346d8457d088da56c08512b1094d74fe Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Sat, 11 Jan 2020 15:01:23 +0100
Subject: Better sphere readability again

---
 src/ui_widgets.py | 60 ++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 51 insertions(+), 9 deletions(-)

diff --git a/src/ui_widgets.py b/src/ui_widgets.py
index 33a09a1..97f5a0f 100644
--- a/src/ui_widgets.py
+++ b/src/ui_widgets.py
@@ -243,12 +243,9 @@ class PoincareWidget(gl.GLViewWidget):
 		                               QSizePolicy.Expanding))
 		self.setMinimumWidth(200)
 
-		zgrid = gl.GLGridItem()
-		zgrid.scale(0.1, 0.1, 0.1)
-		self.addItem(zgrid)
-
 		axis = gl.GLAxisItem()
-		axis.scale(0.2, 0.2, 0.2)
+		axis.scale(1.5, 1.5, 1.5)
+		axis.translate(0.001, 0.001, 0.001)
 		self.addItem(axis)
 
 		sphere = gl.GLMeshItem(
@@ -259,6 +256,38 @@ class PoincareWidget(gl.GLViewWidget):
 
 		self.arcs = []
 
+		t = np.linspace(0, 2 * np.pi, 100)
+
+		for lat in np.arange(-90, 91, 5):
+			theta = lat / 180 * np.pi
+			z = np.sin(theta)
+			r = np.cos(theta)
+			points = np.array([
+				r * np.cos(t),
+				r * np.sin(t),
+				z * np.ones(len(t))
+			])
+			color = [1, 1, 1, 1] if abs(int(lat)) in [0, 15, 30, 45, 60, 90] else [0.3, 0.3, 0.3, 1]
+			circle = gl.GLLinePlotItem(pos=0.997 * np.transpose(points),
+				color=color, width=1, antialias=True,
+				mode="line_strip", glOptions="opaque")
+			self.addItem(circle)
+
+		for lon in np.arange(0, 181, 5):
+			phi = lon / 180 * np.pi
+
+			points = np.array([
+				np.sin(phi) * np.cos(t),
+				np.cos(phi) * np.cos(t),
+				np.sin(t)
+			])
+	
+			color = [1, 1, 1, 1] if int(lon) % 15 == 0 else [0.3, 0.3, 0.3, 1]
+			circle = gl.GLLinePlotItem(pos=0.997 * np.transpose(points),
+				color=color, width=1, antialias=True,
+				mode="line_strip", glOptions="opaque")
+			self.addItem(circle)
+
 
 	def make_arc(state, element, N=50):
 		P = scipy.linalg.fractional_matrix_power(element.matrix(), 1 / N)
@@ -290,16 +319,29 @@ class PoincareWidget(gl.GLViewWidget):
 			self.removeItem(arc)
 		self.arcs = []
 
-		for i, element in enumerate(system.elements[1:]):
-			state = system.states[i] # i - 1 actually
+		for i, element in enumerate(system.elements[0:]):
+			color = PoincareWidget.colors[i % len(PoincareWidget.colors)]
+			points = 1.5 * np.array([
+				[np.cos(2 * element.angle), np.sin(2 * element.angle)],
+				[-np.cos(2 * element.angle), -np.sin(2 * element.angle)]])
+			arc = gl.GLLinePlotItem(pos=points, color=color,
+				width=2, antialias=True, mode="line_strip",
+				glOptions="opaque")
+			self.addItem(arc)
+			self.arcs.append(arc)
+
+			if i == 0:
+				continue
+	
+			state = system.states[i - 1] # i - 1 actually
 			if state is None:
 				continue
 
-			color = PoincareWidget.colors[i % len(PoincareWidget.colors)]
-
 			points = PoincareWidget.make_arc(state, element)
 			arc = gl.GLLinePlotItem(pos=points, color=color,
 				width=2, antialias=True, mode="line_strip",
 				glOptions="opaque")
 			self.addItem(arc)
 			self.arcs.append(arc)
+
+
-- 
cgit