From 8015c4c0e157e89d362fc4e12790d22e2e9fa875 Mon Sep 17 00:00:00 2001
From: Stefan Suhren <suhren.stefan@fh-swf.de>
Date: Mon, 7 Dec 2015 14:27:09 +0100
Subject: Implement skeleton

---
 src/gldisc.cpp | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 src/gldisc.h   |  6 +++++
 2 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/src/gldisc.cpp b/src/gldisc.cpp
index cf65450..5002fe8 100644
--- a/src/gldisc.cpp
+++ b/src/gldisc.cpp
@@ -3,15 +3,83 @@
 GLDisc::GLDisc(double radius, double height, int sides)
     :GLBody(radius)
 {
-
+    m_height = height;
+    m_sides = sides;
 }
 
 void GLDisc::makeSurface(QVector<GLPoint> *pointContainer, QVector<GLshort> *indexContainer)
 {
+    GLBody::makeSurface(pointContainer, indexContainer);
+
+    QVector3D t0 = QVector3D(0.0, 0.0, 0.0); //dummy texture
+
+    m_firstPoint = m_points->size();
+
+    m_points->append(GLPoint(v_Zero, -v_Z, t0, m_color));
+
+    for(int side = 0; side < m_sides; side++)
+    {
+        QVector2D tmp = calculatePoint(side * 2 * M_PI / m_sides);
+
+        m_points->append(GLPoint(m_radius * tmp, -v_Z, t0, m_color));
+        m_points->append(GLPoint(m_radius * tmp, tmp, t0, m_color));
+        m_points->append(GLPoint(QVector3D(m_radius * tmp, m_height), tmp, t0, m_color));
+        m_points->append(GLPoint(QVector3D(m_radius * tmp, m_height), v_Z, t0, m_color));
+    }
+
+    m_points->append(GLPoint(m_height * v_Z, v_Z, t0, m_color));
+
+    m_nextPoint = m_points->size();
+
+    m_firstIndex = m_indices->size();
+
+    for(int side = 0; side < m_sides - 1; side++)
+    {
+        m_indices->append(m_firstPoint);
+        m_indices->append(m_firstPoint + 1 + 4 * side);
+        m_indices->append(m_firstPoint + 5 + 4 * side);
+
+        m_indices->append(m_firstPoint + 2 + 4 * side);
+        m_indices->append(m_firstPoint + 6 + 4 * side);
+        m_indices->append(m_firstPoint + 3 + 4 * side);
 
+        m_indices->append(m_firstPoint + 3 + 4 * side);
+        m_indices->append(m_firstPoint + 7 + 4 * side);
+        m_indices->append(m_firstPoint + 6 + 4 * side);
+
+        m_indices->append(m_firstPoint + 4 + 4 * side);
+        m_indices->append(m_firstPoint + 8 + 4 * side);
+        m_indices->append(m_nextPoint - 1);
+    }
+
+    m_indices->append(m_firstPoint);
+    m_indices->append(m_firstPoint + 1 + 4 * (m_sides - 1));
+    m_indices->append(m_firstPoint + 1);
+
+    m_indices->append(m_firstPoint + 2 + 4 * (m_sides - 1));
+    m_indices->append(m_firstPoint + 2);
+    m_indices->append(m_firstPoint + 3 + 4 * (m_sides - 1));
+
+    m_indices->append(m_firstPoint + 3 + 4 * (m_sides - 1));
+    m_indices->append(m_firstPoint + 3);
+    m_indices->append(m_firstPoint + 2);
+
+    m_indices->append(m_firstPoint + 4 + 4 * (m_sides - 1));
+    m_indices->append(m_firstPoint + 4);
+    m_indices->append(m_nextPoint - 1);
+
+    m_nextIndex = m_indices->size();
 }
 
 bool GLDisc::isHit(QVector3D p1, QVector3D p2)
 {
 
 }
+
+QVector2D GLDisc::calculatePoint(double sideAngle)
+{
+    double x = sin(sideAngle);
+    double y = cos(sideAngle);
+
+    return QVector2D(x, y);
+}
diff --git a/src/gldisc.h b/src/gldisc.h
index 21db6b8..18e935e 100644
--- a/src/gldisc.h
+++ b/src/gldisc.h
@@ -12,6 +12,12 @@ public:
 
     virtual void makeSurface(QVector<GLPoint> *pointContainer, QVector<GLshort> *indexContainer);
     virtual bool isHit(QVector3D p1, QVector3D p2);
+
+private:
+    QVector2D calculatePoint(double sideAngle);
+
+    double m_height;
+    int m_sides;
 };
 
 #endif // GLDISC_H
-- 
cgit v1.2.3-70-g09d2