Long live Qt!

1 files changed, 160 insertions, 0 deletions

diff --git a/demos/boxes/roundedbox.cpp b/demos/boxes/roundedbox.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "roundedbox.h"
+
+//============================================================================//
+//                                P3T2N3Vertex                                //
+//============================================================================//
+
+VertexDescription P3T2N3Vertex::description[] = {
+    {VertexDescription::Position, GL_FLOAT, SIZE_OF_MEMBER(P3T2N3Vertex, position) / sizeof(float), offsetof(P3T2N3Vertex, position), 0},
+    {VertexDescription::TexCoord, GL_FLOAT, SIZE_OF_MEMBER(P3T2N3Vertex, texCoord) / sizeof(float), offsetof(P3T2N3Vertex, texCoord), 0},
+    {VertexDescription::Normal, GL_FLOAT, SIZE_OF_MEMBER(P3T2N3Vertex, normal) / sizeof(float), offsetof(P3T2N3Vertex, normal), 0},
+    {VertexDescription::Null, 0, 0, 0, 0},
+};
+
+//============================================================================//
+//                                GLRoundedBox                                //
+//============================================================================//
+
+float lerp(float a, float b, float t)
+{
+    return a * (1.0f - t) + b * t;
+}
+
+GLRoundedBox::GLRoundedBox(float r, float scale, int n)
+    : GLTriangleMesh<P3T2N3Vertex, unsigned short>((n+2)*(n+3)*4, (n+1)*(n+1)*24+36+72*(n+1))
+{
+    int vidx = 0, iidx = 0;
+    int vertexCountPerCorner = (n + 2) * (n + 3) / 2;
+
+    P3T2N3Vertex *vp = m_vb.lock();
+    unsigned short *ip = m_ib.lock();
+
+    if (!vp || !ip) {
+        qWarning("GLRoundedBox::GLRoundedBox: Failed to lock vertex buffer and/or index buffer.");
+        m_ib.unlock();
+        m_vb.unlock();
+        return;
+    }
+
+    for (int corner = 0; corner < 8; ++corner) {
+        gfx::Vector3f centre;
+        centre[0] = (corner & 1 ? 1.0f : -1.0f);
+        centre[1] = (corner & 2 ? 1.0f : -1.0f);
+        centre[2] = (corner & 4 ? 1.0f : -1.0f);
+        int winding = (corner & 1) ^ ((corner >> 1) & 1) ^ (corner >> 2);
+        int offsX = ((corner ^ 1) - corner) * vertexCountPerCorner;
+        int offsY = ((corner ^ 2) - corner) * vertexCountPerCorner;
+        int offsZ = ((corner ^ 4) - corner) * vertexCountPerCorner;
+
+        // Face polygons
+        if (winding) {
+            ip[iidx++] = vidx;
+            ip[iidx++] = vidx + offsX;
+            ip[iidx++] = vidx + offsY;
+
+            ip[iidx++] = vidx + vertexCountPerCorner - n - 2;
+            ip[iidx++] = vidx + vertexCountPerCorner - n - 2 + offsY;
+            ip[iidx++] = vidx + vertexCountPerCorner - n - 2 + offsZ;
+
+            ip[iidx++] = vidx + vertexCountPerCorner - 1;
+            ip[iidx++] = vidx + vertexCountPerCorner - 1 + offsZ;
+            ip[iidx++] = vidx + vertexCountPerCorner - 1 + offsX;
+        }
+
+        for (int i = 0; i < n + 2; ++i) {
+
+            // Edge polygons
+            if (winding && i < n + 1) {
+                ip[iidx++] = vidx + i + 1;
+                ip[iidx++] = vidx;
+                ip[iidx++] = vidx + offsY + i + 1;
+                ip[iidx++] = vidx + offsY;
+                ip[iidx++] = vidx + offsY + i + 1;
+                ip[iidx++] = vidx;
+
+                ip[iidx++] = vidx + i;
+                ip[iidx++] = vidx + 2 * i + 2;
+                ip[iidx++] = vidx + i + offsX;
+                ip[iidx++] = vidx + 2 * i + offsX + 2;
+                ip[iidx++] = vidx + i + offsX;
+                ip[iidx++] = vidx + 2 * i + 2;
+
+                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 1 - i;
+                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 2 - i;
+                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 1 - i + offsZ;
+                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 2 - i + offsZ;
+                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 1 - i + offsZ;
+                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 2 - i;
+            }
+
+            for (int j = 0; j <= i; ++j) {
+                gfx::Vector3f normal = gfx::Vector3f::vector(i - j, j, n + 1 - i).normalized();
+                gfx::Vector3f pos = centre * (0.5f - r + r * normal);
+
+                vp[vidx].position = scale * pos;
+                vp[vidx].normal = centre * normal;
+                vp[vidx].texCoord = gfx::Vector2f::vector(pos[0], pos[1]) + 0.5f;
+
+                // Corner polygons
+                if (i < n + 1) {
+                    ip[iidx++] = vidx;
+                    ip[iidx++] = vidx + i + 2 - winding;
+                    ip[iidx++] = vidx + i + 1 + winding;
+                }
+                if (i < n) {
+                    ip[iidx++] = vidx + i + 1 + winding;
+                    ip[iidx++] = vidx + i + 2 - winding;
+                    ip[iidx++] = vidx + 2 * i + 4;
+                }
+
+                ++vidx;
+            }
+        }
+
+    }
+
+    m_ib.unlock();
+    m_vb.unlock();
+}
+