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Merge pull request #64 from selmf/raytracing

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Raytracing and Antialiasing
This commit is contained in:
Luis Ángel San Martín 2019-08-26 15:19:58 +02:00 committed by GitHub
commit f4b4f11a70
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2 changed files with 46 additions and 38 deletions
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83
common/gl/yacreader_flow_gl.cpp
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@ -231,8 +231,7 @@ YACReaderFlowGL::YACReaderFlowGL(QWidget *parent, struct Preset p)
QSurfaceFormat f = format();
//TODO add antialiasing
//f.setSamples(4);
f.setSamples(4);
f.setVersion(2, 1);
f.setSwapInterval(0);
setFormat(f);
@ -1066,27 +1065,11 @@ void YACReaderFlowGL::keyPressEvent(QKeyEvent *event)
void YACReaderFlowGL::mousePressEvent(QMouseEvent *event)
{
makeCurrent();
if (event->button() == Qt::LeftButton) {
float x, y;
x = event->x() * devicePixelRatio();
y = event->y() * devicePixelRatio();
GLint viewport[4];
QMatrix4x4 modelview;
QMatrix4x4 projection;
GLfloat winZ;
glGetFloatv(GL_MODELVIEW_MATRIX, modelview.data());
glGetFloatv(GL_PROJECTION_MATRIX, projection.data());
glGetIntegerv(GL_VIEWPORT, viewport);
glReadPixels(x, int((float)viewport[3] - (float)y), 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ);
auto clickVector = QVector3D(x, (float)viewport[3] - (float)y, winZ);
clickVector = clickVector.unproject(modelview, projection, QRect(viewport[0], viewport[1], viewport[2], viewport[3]));
if ((clickVector.x() >= 0.5 && !flowRightToLeft) || (clickVector.x() <= -0.5 && flowRightToLeft)) {
QVector3D intersection = getPlaneIntersection(event->x(), event->y(), images[currentSelected]);
if ((intersection.x() > 0.5 && !flowRightToLeft) || (intersection.x() < -0.5 && flowRightToLeft)) {
showNext();
} else if ((clickVector.x() <= -0.5 && !flowRightToLeft) || (clickVector.x() >= 0.5 && flowRightToLeft)) {
} else if ((intersection.x() < -0.5 && !flowRightToLeft) || (intersection.x() > 0.5 && flowRightToLeft)) {
showPrevious();
}
} else {
@ -1097,28 +1080,52 @@ void YACReaderFlowGL::mousePressEvent(QMouseEvent *event)
void YACReaderFlowGL::mouseDoubleClickEvent(QMouseEvent *event)
{
makeCurrent();
float x, y;
x = event->x() * devicePixelRatio();
y = event->y() * devicePixelRatio();
GLint viewport[4];
QMatrix4x4 modelview;
QMatrix4x4 projection;
GLfloat winZ;
QVector3D intersection = getPlaneIntersection(event->x(), event->y(), images[currentSelected]);
glGetFloatv(GL_MODELVIEW_MATRIX, modelview.data());
glGetFloatv(GL_PROJECTION_MATRIX, projection.data());
glGetIntegerv(GL_VIEWPORT, viewport);
glReadPixels(x, int((float)viewport[3] - (float)y), 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ);
auto clickVector = QVector3D(x, (float)viewport[3] - (float)y, winZ);
clickVector = clickVector.unproject(modelview, projection, QRect(viewport[0], viewport[1], viewport[2], viewport[3]));
if (clickVector.x() <= 0.5 && clickVector.x() >= -0.5) {
if (intersection.x() < 0.5 && intersection.x() > -0.5) {
emit selected(centerIndex());
event->accept();
}
}
QVector3D YACReaderFlowGL::getPlaneIntersection(int x, int y, YACReader3DImage plane)
{
// get viewport and matrices
// TODO: these should be cached!!!
GLint viewport[4];
QMatrix4x4 m_modelview;
QMatrix4x4 m_projection;
makeCurrent();
glGetIntegerv(GL_VIEWPORT, viewport);
glGetFloatv(GL_MODELVIEW_MATRIX, m_modelview.data());
glGetFloatv(GL_PROJECTION_MATRIX, m_projection.data());
doneCurrent();
//create the picking ray
QVector3D ray_origin(x * devicePixelRatio(), y * devicePixelRatio(), 0);
QVector3D ray_end(x * devicePixelRatio(), y * devicePixelRatio(), 1.0);
// TODO: These should be cached in the class
ray_origin = ray_origin.unproject(m_modelview, m_projection, QRect(viewport[0], viewport[1], viewport[2], viewport[3]));
ray_end = ray_end.unproject(m_modelview, m_projection, QRect(viewport[0], viewport[1], viewport[2], viewport[3]));
QVector3D ray_vector = ray_end - ray_origin;
//calculate the plane vectors
QVector3D plane_origin((plane.width / 2) * -1, -0.5, 0);
QVector3D plane_vektor_1 = QVector3D(plane.width / 2, -0.5, 0) - plane_origin;
QVector3D plane_vektor_2 = QVector3D((plane.width / 2) * -1, -0.5 * plane.height, 0) - plane_origin;
//get the intersection using Cramer's rule. We only x for the line, not the plane
double intersection_LES_determinant = ((plane_vektor_1.x() * plane_vektor_2.y() * (-1) * ray_vector.z()) + (plane_vektor_2.x() * (-1) * ray_vector.y() * plane_vektor_1.z()) + ((-1) * ray_vector.x() * plane_vektor_1.y() * plane_vektor_2.z()) - ((-1) * ray_vector.x() * plane_vektor_2.y() * plane_vektor_1.z()) - (plane_vektor_1.x() * (-1) * ray_vector.y() * plane_vektor_2.z()) - (plane_vektor_2.x() * plane_vektor_1.y() * (-1) * ray_vector.z()));
QVector3D det = ray_origin - plane_origin;
double intersection_ray_determinant = ((plane_vektor_1.x() * plane_vektor_2.y() * det.z()) + (plane_vektor_2.x() * det.y() * plane_vektor_1.z()) + (det.x() * plane_vektor_1.y() * plane_vektor_2.z()) - (det.x() * plane_vektor_2.y() * plane_vektor_1.z()) - (plane_vektor_1.x() * det.y() * plane_vektor_2.z()) - (plane_vektor_2.x() * plane_vektor_1.y() * det.z()));
//return the intersection point
return ray_origin + ray_vector * (intersection_ray_determinant / intersection_LES_determinant);
}
YACReaderComicFlowGL::YACReaderComicFlowGL(QWidget *parent, struct Preset p)

1
common/gl/yacreader_flow_gl.h
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@ -266,6 +266,7 @@ public slots:
void render();
//void paintEvent(QPaintEvent *event);
QVector3D getPlaneIntersection(int x, int y, YACReader3DImage plane);
void mouseDoubleClickEvent(QMouseEvent *event);
void mousePressEvent(QMouseEvent *event);
void wheelEvent(QWheelEvent *event);