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****************************************************************************/
#include "view.h"
#include "teapot.h"
#include "cube.h"
#include <QtCore/qdebug.h>
#include <QtCore/qtimer.h>
#include <stdio.h>
#include "qaccelerometer.h"
#if defined(QT_OPENGL_ES)
#define USE_BUFFERS 1
#endif
View::View(QWidget *parent)
: QGLWidget(parent),
sensitivity(0.1f),
painter(0),
showFrameRate(false)
{
mainCamera = new Camera(this);
roomCamera = new Camera(this);
roomCamera->setAdjustForAspectRatio(false);
sensor = new QAccelerometer(this);
connect(sensor, SIGNAL(readingChanged()), this, SLOT(accelerometerTimeout()));
sensor->start();
time.start();
vertexBuffer = 0;
indexBuffer = 0;
}
View::~View()
{
delete painter;
}
void View::resizeGL(int width, int height)
{
glViewport(0, 0, width, height);
}
void View::initializeGL()
{
#if defined(QT_OPENGL_ES_2)
painter = new ShaderPainter();
#else
painter = new FixedFunctionPainter();
#endif
glEnable(GL_DEPTH_TEST);
roomMaterialBack = new Material();
roomMaterialBack->setDiffuseColor(QColor(128, 100, 0));
roomMaterialLeftRight = new Material();
roomMaterialLeftRight->setDiffuseColor(Qt::cyan);
roomMaterialTopBottom = new Material();
roomMaterialTopBottom->setDiffuseColor(Qt::yellow);
cubeMaterial = new Material();
cubeMaterial->setColor(QColor(170, 202, 0));
teapotMaterial = new Material();
teapotMaterial->setAmbientColor(QColor(192, 150, 128));
teapotMaterial->setSpecularColor(QColor(60, 60, 60));
teapotMaterial->setShininess(128);
roomModel = new LightModel(this);
roomModel->setAmbientSceneColor(Qt::white);
roomModel->setViewerPosition(LightModel::LocalViewer);
normalModel = new LightModel(this);
Light *light = new Light(this);
light->setPosition(QVector3D(0.0f, 0.0f, 3.0f));
painter->setLight(light);
texture = bindTexture(QImage(QLatin1String(":/qtlogo.png")));
#ifdef USE_BUFFERS
// Upload the teapot data into GL buffers for quicker rendering.
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBufferData(GL_ARRAY_BUFFER,
teapotVertexCount * teapotVertexStride * sizeof(float),
teapotVertexData, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,
teapotTriangleCount * 3 * sizeof(ushort),
teapotTriangleData, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
#endif
}
void View::paintGL()
{
if (showFrameRate)
qWarning("time since last frame: %d ms", time.restart());
qreal aspectRatio = qreal(width()) / qreal(height());
QMatrix4x4 mv, mv2;
QMatrix4x4 proj;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
mv = roomCamera->modelViewMatrix();
proj = roomCamera->projectionMatrix(aspectRatio);
painter->setLightModel(roomModel);
painter->setMatrices(mv, proj);
painter->selectMaterial(roomMaterialBack);
painter->drawQuad(QVector3D(-3.0f, -3.0f, -15.0f),
QVector3D( 3.0f, -3.0f, -15.0f),
QVector3D( 3.0f, 3.0f, -15.0f),
QVector3D(-3.0f, 3.0f, -15.0f),
QVector3D(0.0f, 0.0f, 1.0f));
painter->selectMaterial(roomMaterialLeftRight);
painter->drawQuad(QVector3D(-3.0f, -3.0f, -15.0f),
QVector3D(-3.0f, 3.0f, -15.0f),
QVector3D(-3.0f, 3.0f, 0.0f),
QVector3D(-3.0f, -3.0f, 0.0f),
QVector3D(1.0f, 0.0f, 0.0f));
painter->drawQuad(QVector3D(3.0f, 3.0f, -15.0f),
QVector3D(3.0f, -3.0f, -15.0f),
QVector3D(3.0f, -3.0f, 0.0f),
QVector3D(3.0f, 3.0f, 0.0f),
QVector3D(-1.0f, 0.0f, 0.0f));
painter->selectMaterial(roomMaterialTopBottom);
painter->drawQuad(QVector3D(-3.0f, 3.0f, -15.0f),
QVector3D( 3.0f, 3.0f, -15.0f),
QVector3D( 3.0f, 3.0f, 0.0f),
QVector3D(-3.0f, 3.0f, 0.0f),
QVector3D(0.0f, -1.0f, 0.0f));
painter->drawQuad(QVector3D(-3.0f, -3.0f, -15.0f),
QVector3D(-3.0f, -3.0f, 0.0f),
QVector3D( 3.0f, -3.0f, 0.0f),
QVector3D( 3.0f, -3.0f, -15.0f),
QVector3D(0.0f, 1.0f, 0.0f));
mv = mv2 = mainCamera->modelViewMatrix();
proj = mainCamera->projectionMatrix(aspectRatio);
mv.translate(1.0f, -0.5f, 0.0f);
mv.rotate(45.0f, 1.0f, 1.0f, 1.0f);
painter->setMatrices(mv, proj);
painter->setLightModel(normalModel);
painter->selectTexturedMaterial(cubeMaterial);
painter->setVertices(cubeVertices, 8);
painter->setNormals(cubeVertices + 3, 8);
painter->setTexCoords(cubeVertices + 6, 8);
glDrawArrays(GL_TRIANGLES, 0, 36);
mv2.translate(-0.8f, -1.5f, -3.0f);
painter->setMatrices(mv2, proj);
painter->selectMaterial(teapotMaterial);
#ifdef USE_BUFFERS
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
painter->setVertices(0, 8);
painter->setNormals(reinterpret_cast<float *>(3 * sizeof(float)), 8);
painter->setTexCoords(reinterpret_cast<float *>(6 * sizeof(float)), 8);
glDrawElements(GL_TRIANGLES, teapotTriangleCount * 3,
GL_UNSIGNED_SHORT, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
#else
painter->setVertices(teapotVertexData, 8);
painter->setNormals(teapotVertexData + 3, 8);
painter->setTexCoords(teapotVertexData + 6, 8);
glDrawElements(GL_TRIANGLES, teapotTriangleCount * 3,
GL_UNSIGNED_SHORT, teapotTriangleData);
#endif
}
void View::accelerometerTimeout()
{
QVector3D g = gravity();
mainCamera->setMotionAdjustment(g);
roomCamera->setMotionAdjustment(g);
update();
}
#define ACCEL_TO_G(v) (v / 9.80665)
QVector3D View::gravity() const
{
qreal x = ACCEL_TO_G(sensor->reading()->x()) * sensitivity;
qreal y = ACCEL_TO_G(sensor->reading()->y()) * sensitivity;
qreal z = ACCEL_TO_G(sensor->reading()->z());
return QVector3D(x, y, z);
}