From 1fb916f0499e6a9e46bd27ebc56b6e0e7a786f95 Mon Sep 17 00:00:00 2001
From: Oliver Bock <oliver.bock@aei.mpg.de>
Date: Sun, 30 Nov 2008 19:36:52 +0100
Subject: [PATCH] Added interactive zoom and spherical pan/tilt control
* Zoom: right mouse button + move up/down
* Pan: left mouse button + move left/right (pending, possible fix: upvector?)
* Tilt: left mouse button + move up/down (pending, possible fix: upvector?)
---
src/pulsaranimationwidget.cpp | 61 ++++++++++++++++++++++++++++++++++-
src/pulsaranimationwidget.h | 24 +++++++++++---
2 files changed, 80 insertions(+), 5 deletions(-)
diff --git a/src/pulsaranimationwidget.cpp b/src/pulsaranimationwidget.cpp
index 1e5e25d..9dca1f7 100644
--- a/src/pulsaranimationwidget.cpp
+++ b/src/pulsaranimationwidget.cpp
@@ -42,6 +42,15 @@ PulsarAnimationWidget::PulsarAnimationWidget(QWidget *parent) :
setOrbitFrequency(0.2f);
setOrbitRadius(4.0f);
m_orbitRotationAngle = 0.0f;
+
+ m_mouseLastX = 0;
+ m_mouseLastY = 0;
+ m_mouseAngleH = 90;
+ m_mouseAngleV = 30;
+ m_cameraZoom = 10.0f;
+ m_cameraZoomLBound = 2.0f;
+
+ updateCameraPosition(m_mouseAngleH, m_mouseAngleV, m_cameraZoom);
}
PulsarAnimationWidget::~PulsarAnimationWidget()
@@ -106,7 +115,9 @@ void PulsarAnimationWidget::paintGL()
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
- gluLookAt(0.0, 6.0, 10.0, 0.0, 0.0, 0.0, 0.0, 2.0, -5.0);
+ gluLookAt(m_cameraPosX, m_cameraPosY, m_cameraPosZ,
+ 0.0, 0.0, 0.0,
+ 0.0, 2.0, -5.0);
// TODO: should be located elsewhere
static GLfloat no_mat[] = { 0.0, 0.0, 0.0, 1.0 };
@@ -199,6 +210,54 @@ void PulsarAnimationWidget::updateOrbit()
}
}
+void PulsarAnimationWidget::mouseMoveEvent(QMouseEvent *event)
+{
+ Qt::MouseButtons buttons = event->buttons();
+ if((buttons & Qt::LeftButton) == Qt::LeftButton) {
+ if(m_mouseLastX != 0) {
+ m_mouseAngleH -= (m_mouseLastX - event->x()) / 2;
+ m_mouseAngleH = m_mouseAngleH < 360? m_mouseAngleH : 0;
+
+ }
+ if(m_mouseLastY != 0) {
+ m_mouseAngleV -= (m_mouseLastY - event->y()) / 2;
+ m_mouseAngleV = m_mouseAngleV < 90? m_mouseAngleV : 90;
+ m_mouseAngleV = m_mouseAngleV > -90? m_mouseAngleV : -90;
+ }
+
+ m_mouseLastX = event->x();
+ m_mouseLastY = event->y();
+ }
+ else if((buttons & Qt::RightButton) == Qt::RightButton) {
+ if(m_mouseLastY != 0) {
+ m_cameraZoom -= (m_mouseLastY - event->y()) / 2;
+ m_cameraZoom = m_cameraZoom >= m_cameraZoomLBound? m_cameraZoom : m_cameraZoomLBound;
+ updateCameraPosition(m_mouseAngleH, m_mouseAngleV, m_cameraZoom);
+ }
+
+ m_mouseLastY = event->y();
+ }
+
+ updateCameraPosition(m_mouseAngleH, m_mouseAngleV, m_cameraZoom);
+}
+
+void PulsarAnimationWidget::mouseReleaseEvent(QMouseEvent *event)
+{
+ m_mouseLastX = 0;
+ m_mouseLastY = 0;
+}
+
+void PulsarAnimationWidget::updateCameraPosition(const int angleH, const int angleV, const float zoom)
+{
+ static const float deg2rad = PI/180.0f;
+
+ m_cameraPosX = sin(angleH * deg2rad) * zoom;
+ m_cameraPosY = sin(angleV * deg2rad) * zoom;
+ m_cameraPosZ = cos(angleH * deg2rad) * cos(abs(angleV * deg2rad)) * zoom;
+
+ updateGL();
+}
+
void PulsarAnimationWidget::setFramePerSecond(const unsigned int fps)
{
m_framesPerSecond = fps;
diff --git a/src/pulsaranimationwidget.h b/src/pulsaranimationwidget.h
index b16dd99..3dc5fa0 100644
--- a/src/pulsaranimationwidget.h
+++ b/src/pulsaranimationwidget.h
@@ -21,8 +21,13 @@
#ifndef PULSARANIMATIONWIDGET_H_
#define PULSARANIMATIONWIDGET_H_
+#include <cmath>
+
#include <QGLWidget>
#include <QTimer>
+#include <QMouseEvent>
+
+#define PI 3.14159265
class PulsarAnimationWidget : public QGLWidget
{
@@ -47,14 +52,15 @@ public slots:
void updateOrbit();
protected:
-
void initializeGL();
-
void resizeGL(int w, int h);
-
void paintGL();
-private:
+ void mouseMoveEvent(QMouseEvent *event);
+ void mouseReleaseEvent(QMouseEvent *event);
+
+ void updateCameraPosition(const int angleH, const int angleV, const float zoom);
+
QTimer m_frameTimer;
QTimer m_pulsarSpinTimer;
QTimer m_orbitTimer;
@@ -71,6 +77,16 @@ private:
float m_orbitRadius;
float m_orbitFrequency;
float m_orbitRotationAngle;
+
+ int m_mouseLastX;
+ int m_mouseLastY;
+ int m_mouseAngleH;
+ int m_mouseAngleV;
+ float m_cameraZoom;
+ float m_cameraZoomLBound;
+ float m_cameraPosX;
+ float m_cameraPosY;
+ float m_cameraPosZ;
};
#endif /* PULSARANIMATIONWIDGET_H_ */
--
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