From 850a3ac48046e3630524c67ecac5e2f26d499b3f Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Tue, 8 Oct 2019 20:55:57 +0200
Subject: Improve mouse monitoring, add 3d view shift support

---
 utility/mouse.py      | 25 ++++++++++++++++---------
 utility/projection.py |  7 +++++++
 2 files changed, 23 insertions(+), 9 deletions(-)

(limited to 'utility')

diff --git a/utility/mouse.py b/utility/mouse.py
index 29d660d..5d7dd5d 100644
--- a/utility/mouse.py
+++ b/utility/mouse.py
@@ -1,11 +1,10 @@
 from OpenGL.GLUT import *
 
 class MouseDragMonitor:
-    def __init__(self, button, drag_callback, zoom_callback):
+    def __init__(self, button, callback):
         self.button   = button
         self.active   = False
-        self.drag_callback = drag_callback
-        self.zoom_callback = zoom_callback
+        self.callback = callback
 
     def on_mouse(self, button, state, x, y):
         if button == self.button:
@@ -13,15 +12,23 @@ class MouseDragMonitor:
             self.last_x = x
             self.last_y = y
 
-        if button == 3:
-            self.zoom_callback(-1.0)
-        elif button == 4:
-            self.zoom_callback(1.0)
-
     def on_mouse_move(self, x, y):
         if self.active:
             delta_x = self.last_x - x
             delta_y = y - self.last_y
             self.last_x = x
             self.last_y = y
-            self.drag_callback(delta_x, delta_y)
+            self.callback(delta_x, delta_y)
+
+class MouseScrollMonitor:
+    def __init__(self, callback):
+        self.callback = callback
+
+    def on_mouse(self, button, state, x, y):
+        if button == 3:
+            self.callback(-1.0)
+        elif button == 4:
+            self.callback(1.0)
+
+    def on_mouse_move(self, x, y):
+        pass
diff --git a/utility/projection.py b/utility/projection.py
index 335e488..1750fac 100644
--- a/utility/projection.py
+++ b/utility/projection.py
@@ -39,6 +39,13 @@ class Rotation:
         self.rotation_x = quaternion.Quaternion()
         self.update(x,z)
 
+    def shift(self, x, z):
+        self.matrix = numpy.matmul(
+            self.matrix,
+            matrix44.create_from_translation([x,0,z])
+        )
+        self.inverse_matrix = numpy.linalg.inv(self.matrix)
+
     def update(self, x, z):
         rotation_x = quaternion.Quaternion(quaternion.create_from_eulers([x,0,0]))
         rotation_z = self.rotation_x.conjugate.cross(
-- 
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