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Make billboard text display properly when viewing in any direction

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This commit is contained in:
Benau 2016-10-26 00:34:13 +08:00
parent e31a7ca4a8
commit a38c8f0c19
1 changed files with 12 additions and 6 deletions
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18
src/graphics/stk_text_billboard.cpp
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@ -54,7 +54,9 @@ void STKTextBillboard::updateAbsolutePosition()
{ {
// Override to not use the parent's rotation // Override to not use the parent's rotation
AbsoluteTransformation = getRelativeTransformation(); AbsoluteTransformation = getRelativeTransformation();
AbsoluteTransformation.setTranslation(AbsoluteTransformation.getTranslation() + Parent->getAbsolutePosition()); core::vector3df wc = RelativeTranslation;
Parent->getAbsoluteTransformation().transformVect(wc);
AbsoluteTransformation.setTranslation(wc);
} }
else else
AbsoluteTransformation = getRelativeTransformation(); AbsoluteTransformation = getRelativeTransformation();
@ -173,11 +175,15 @@ scene::IMesh* STKTextBillboard::getTextMesh(core::stringw text, FontWithFace* fo
void STKTextBillboard::updateNoGL() void STKTextBillboard::updateNoGL()
{ {
scene::ICameraSceneNode* curr_cam = irr_driver->getSceneManager()->getActiveCamera(); scene::ICameraSceneNode* curr_cam =irr_driver->getSceneManager()->getActiveCamera();
core::vector3df cam_pos = curr_cam->getPosition(); btMatrix3x3 m;
core::vector3df text_pos = this->getAbsolutePosition(); m.setFromOpenGLSubMatrix(curr_cam->getViewMatrix().pointer());
float angle = atan2(text_pos.X - cam_pos.X, text_pos.Z - cam_pos.Z); btQuaternion q;
this->setRotation(core::vector3df(0.0f, angle * 180.0f / M_PI, 0.0f)); m.getRotation(q);
q.setW(-q.getW());
Vec3 hpr;
hpr.setHPR(q);
this->setRotation(hpr.toIrrHPR());
updateAbsolutePosition(); updateAbsolutePosition();
STKMeshSceneNode::updateNoGL(); STKMeshSceneNode::updateNoGL();