void AppWindow::keyPressEvent(QKeyEvent *event) {
if (event->key() == Qt::Key_Escape) {
QCoreApplication::instance()->quit();
} else if (event->key() == Qt::Key_O) {
viewRotate();
viewRotateAct->setChecked(true);
} else if (event->key() == Qt::Key_N) {
viewTranslate();
viewTranslateAct->setChecked(true);
} else if (event->key() == Qt::Key_P) {
viewPerspective();
viewPerspectiveAct->setChecked(true);
} else if (event->key() == Qt::Key_R) {
modelRotate();
modelRotateAct->setChecked(true);
} else if (event->key() == Qt::Key_T) {
modelTranslate();
modelTranslateAct->setChecked(true);
} else if (event->key() == Qt::Key_S) {
modelScale();
modelScaleAct->setChecked(true);
} else if (event->key() == Qt::Key_A) {
resetView();
} else if (event->key() == Qt::Key_V) {
viewPortMode();
viewPortModeAct->setChecked(true);
}
}
void LLPostProcess::doEffects(void)
{
/// Save GL State
glPushAttrib(GL_ALL_ATTRIB_BITS);
glPushClientAttrib(GL_ALL_ATTRIB_BITS);
/// Copy the screen buffer to the render texture
{
U32 tex = mSceneRenderTexture->getTexName() ;
copyFrameBuffer(tex, screenW, screenH);
}
/// Clear the frame buffer.
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
/// Change to an orthogonal view
viewOrthogonal(screenW, screenH);
checkError();
applyShaders();
LLGLSLShader::bindNoShader();
checkError();
/// Change to a perspective view
viewPerspective();
/// Reset GL State
glPopClientAttrib();
glPopAttrib();
checkError();
}
// 绘制模糊的图象
void MyGLWidget::drawBlur(int times, float inc)
{
float spost = 0.0f;// 纹理坐标偏移量
float alphainc = 0.9f / times;// alpha混合的衰减量
float alpha = 0.2f;// Alpha初值
// 禁用自动生成纹理坐标
glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_TEXTURE_GEN_T);
glEnable(GL_TEXTURE_2D);// 启用 2D 纹理映射
glDisable(GL_DEPTH_TEST);// 深度测试不可用
glBlendFunc(GL_SRC_ALPHA,GL_ONE);// 设置混合模式
glEnable(GL_BLEND);// 启用混合
glBindTexture(GL_TEXTURE_2D,m_blurTexture);// 绑定混合纹理
viewOrtho();// 切换到标准视图
alphainc = alpha / times;// 减少alpha值
//我们多次绘制这个纹理用于创建那个辐射效果， 缩放这个纹理坐标并且每次我们做另一个关口时增大混合因数 。
//我们绘制25个方块，每次按照0.015f拉伸这个纹理。
glBegin(GL_QUADS);// 开始绘制方块
// 着色模糊物的次数
for (int num = 0;num < times;num++)
{
glColor4f(1.0f, 1.0f, 1.0f, alpha);// 调整alpha值
glTexCoord2f(0+spost,1-spost);
glVertex2f(0,0);
glTexCoord2f(0+spost,0+spost);
glVertex2f(0,480);
glTexCoord2f(1-spost,0+spost);
glVertex2f(640,480);
glTexCoord2f(1-spost,1-spost);
glVertex2f(640,0);
spost += inc;// 逐渐增加 spost (快速靠近纹理中心)
alpha = alpha - alphainc;// 逐渐增加 alpha (逐渐淡出纹理)
}
glEnd();// 完成绘制方块
viewPerspective();// 转换到一个透视视图
glEnable(GL_DEPTH_TEST);// 深度测试可用
glDisable(GL_TEXTURE_2D);// 2D纹理映射不可用
glDisable(GL_BLEND);// 混合不可用
glBindTexture(GL_TEXTURE_2D,0);// 释放模糊纹理
}
void AppWindow::createActions() {
// Creates a new action for quiting and pushes it onto the menu actions vector
menuBar()->setNativeMenuBar(false);
QAction* quitAct = new QAction(tr("&Quit"), this);
m_menu_actions.push_back(quitAct);
// We set the accelerator keys
// Alternatively, you could use: setShortcuts(Qt::CTRL + Qt::Key_P);
quitAct->setShortcuts(QKeySequence::Quit);
// Set the tip
quitAct->setStatusTip(tr("Exits the file"));
// Connect the action with the signal and slot designated
connect(quitAct, SIGNAL(triggered()), this, SLOT(close()));
QAction* resetAct = new QAction(tr("Reset (A)"), this);
m_menu_actions.push_back(resetAct);
connect(resetAct, SIGNAL(triggered()), this, SLOT(resetView()));
viewRotateAct = new QAction(tr("View Rotate (O)"), this);
m_mode_actions.push_back(viewRotateAct);
viewRotateAct->setCheckable(true);
connect(viewRotateAct, SIGNAL(triggered()), this, SLOT(viewRotate()));
viewTranslateAct = new QAction(tr("View Translate (N)"), this);
m_mode_actions.push_back(viewTranslateAct);
viewTranslateAct->setCheckable(true);
connect(viewTranslateAct, SIGNAL(triggered()), this, SLOT(viewTranslate()));
viewPerspectiveAct = new QAction(tr("View Perspective (P)"), this);
m_mode_actions.push_back(viewPerspectiveAct);
viewPerspectiveAct->setCheckable(true);
connect(viewPerspectiveAct, SIGNAL(triggered()), this, SLOT(viewPerspective()));
modelRotateAct = new QAction(tr("Model Rotate (R)"), this);
m_mode_actions.push_back(modelRotateAct);
modelRotateAct->setCheckable(true);
connect(modelRotateAct, SIGNAL(triggered()), this, SLOT(modelRotate()));
modelTranslateAct = new QAction(tr("Model Translate (T)"), this);
m_mode_actions.push_back(modelTranslateAct);
modelTranslateAct->setCheckable(true);
connect(modelTranslateAct, SIGNAL(triggered()), this, SLOT(modelTranslate()));
modelScaleAct = new QAction(tr("Model Scale (S)"), this);
m_mode_actions.push_back(modelScaleAct);
modelScaleAct->setCheckable(true);
connect(modelScaleAct, SIGNAL(triggered()), this, SLOT(modelScale()));
viewPortModeAct = new QAction(tr("Viewport Mode (V)"), this);
m_mode_actions.push_back(viewPortModeAct);
viewPortModeAct->setCheckable(true);
connect(viewPortModeAct, SIGNAL(triggered()), this, SLOT(viewPortMode()));
QActionGroup* modeGroup = new QActionGroup(this);
modeGroup->setExclusive(true);
modeGroup->addAction(viewRotateAct);
modeGroup->addAction(viewTranslateAct);
modeGroup->addAction(viewPerspectiveAct);
modeGroup->addAction(modelRotateAct);
modeGroup->addAction(modelTranslateAct);
modeGroup->addAction(modelScaleAct);
modeGroup->addAction(viewPortModeAct);
modelRotate();
modelRotateAct->setChecked(true);
}
void LLPostProcess::changeOrthogonal(unsigned int width, unsigned int height)
{
viewPerspective();
viewOrthogonal(width, height);
}
