static void _display()
{
// 透視変換を設定
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
float view_x, view_y;
if( glutGet(GLUT_WINDOW_WIDTH) > glutGet(GLUT_WINDOW_HEIGHT) ){
view_x = 1.0;
view_y = 1.0 * glutGet( GLUT_WINDOW_HEIGHT) / glutGet( GLUT_WINDOW_WIDTH );
}else{
view_x = 1.0 * glutGet( GLUT_WINDOW_WIDTH) / glutGet( GLUT_WINDOW_HEIGHT );
view_y = 1.0;
}
view_x *= 10;
view_y *= 10;
glFrustum(-view_x,view_x, -view_y,view_y, 40, 100000);
gluLookAt(0, 0, 100, 0, 0, 0, 0, 1.0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// モデル変換を設定
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glLightfv(GL_LIGHT0, GL_AMBIENT, glm::value_ptr(glm::vec4(0.3)));
glLightfv(GL_LIGHT0, GL_POSITION, glm::value_ptr(glm::vec4(0,1,1,0)));
glLightfv(GL_LIGHT0, GL_DIFFUSE, glm::value_ptr(glm::vec4(1)));
glLightfv(GL_LIGHT0, GL_SPECULAR, glm::value_ptr(glm::vec4(8)));
_scene->BeforeDisplay();
/* トラックボール処理による回転 */
glMultMatrixd(trackballRotation());
_scene->Display();
CHECK();
glutSwapBuffers();
}
//--------------------------------------------------------------------------------------------------
/// Rotate
///
/// \return Returns true if input caused changes to the camera an false if no changes occurred
//--------------------------------------------------------------------------------------------------
bool ManipulatorTrackball::rotate(int posX, int posY)
{
if (m_camera.isNull()) return false;
if (posX == m_lastPosX && posY == m_lastPosY) return false;
const double vpPixSizeX = m_camera->viewport()->width();
const double vpPixSizeY = m_camera->viewport()->height();
if (vpPixSizeX <= 0 || vpPixSizeY <= 0) return false;
const double vpPosX = posX - static_cast<int>(m_camera->viewport()->x());
const double vpPosY = posY - static_cast<int>(m_camera->viewport()->y());
const double vpLastPosX = m_lastPosX - static_cast<int>(m_camera->viewport()->x());
const double vpLastPosY = m_lastPosY - static_cast<int>(m_camera->viewport()->y());
// Scale the new/last positions to the range [-1.0, 1.0]
double newPosX = 2.0*(vpPosX/vpPixSizeX) - 1.0;
double newPosY = 2.0*(vpPosY/vpPixSizeY) - 1.0;
double lastPosX = 2.0*(vpLastPosX/vpPixSizeX) - 1.0;
double lastPosY = 2.0*(vpLastPosY/vpPixSizeY) - 1.0;
Mat4d viewMat = m_camera->viewMatrix();
// Compute rotation quaternion
Quatd rotQuat = trackballRotation(lastPosX, lastPosY, newPosX, newPosY, viewMat, m_rotateSensitivity);
// Update navigation by modifying the view matrix
Mat4d rotMatr = rotQuat.toMatrix4();
rotMatr.translatePostMultiply(-m_rotationPoint);
rotMatr.translatePreMultiply(m_rotationPoint);
viewMat = viewMat*rotMatr;
m_camera->setViewMatrix(viewMat);
m_lastPosX = posX;
m_lastPosY = posY;
return true;
}