85 lines
2 KiB
C++
85 lines
2 KiB
C++
#include "externals.hh"
|
|
#include "camera.hh"
|
|
#include "utilities.hh"
|
|
|
|
|
|
/*= T_Camera =================================================================*/
|
|
|
|
void T_Camera::handleDND(
|
|
ImVec2 const& move ,
|
|
const bool hasCtrl ,
|
|
const bool hasShift ,
|
|
const bool lmb // Left mouse button
|
|
)
|
|
{
|
|
if ( move.x == 0 || move.y == 0 ) {
|
|
return;
|
|
}
|
|
|
|
const float fdx( move.x * .1f * ( hasCtrl ? 1.f : .1f ) );
|
|
const float fdy( move.y * .1f * ( hasCtrl ? 1.f : .1f ) );
|
|
|
|
if ( lmb && hasShift ) {
|
|
// Left mouse button, shift - move camera
|
|
const auto side( glm::normalize( glm::cross( up , dir ) ) );
|
|
lookAt += .1f * ( side * fdx + up * fdy );
|
|
} else if ( lmb ) {
|
|
// Left mouse button, no shift - change yaw/pitch
|
|
updateAngle( angles.y , fdx );
|
|
updateAngle( angles.x , fdy );
|
|
} else {
|
|
// Right mouse button - change roll
|
|
updateAngle( angles.z , fdx );
|
|
}
|
|
update( );
|
|
}
|
|
|
|
void T_Camera::handleWheel(
|
|
const float wheel ,
|
|
const bool hasCtrl ,
|
|
const bool hasShift
|
|
)
|
|
{
|
|
const float delta( wheel * ( hasCtrl ? 1.f : .1f) );
|
|
if ( hasShift ) {
|
|
fov = std::max( 1.f , std::min( 179.f , fov + delta ) );
|
|
} else {
|
|
distance = std::max( .01f , distance - delta );
|
|
}
|
|
update( );
|
|
}
|
|
|
|
/*----------------------------------------------------------------------------*/
|
|
|
|
void T_Camera::makeUI( )
|
|
{
|
|
if ( !ImGui::CollapsingHeader( "Camera" ) ) {
|
|
return;
|
|
}
|
|
|
|
const bool changed[] = {
|
|
ImGui::DragFloat3( "Look at" , &lookAt.x ) ,
|
|
ImGui::DragFloat( "Distance" , &distance , .1f ,
|
|
.1f , 1e8 , "%.1f" ) ,
|
|
ImGui::DragFloat3( "Angles" , &angles.x , .01f , -180 , 180 ) ,
|
|
ImGui::DragFloat( "FoV" , &fov , .01f , .01f , 179.9f )
|
|
};
|
|
|
|
for ( unsigned i = 0 ; i < sizeof( changed ) / sizeof( bool ) ; i ++ ) {
|
|
if ( changed[ i ] ) {
|
|
update( );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*----------------------------------------------------------------------------*/
|
|
|
|
void T_Camera::update( )
|
|
{
|
|
anglesToMatrix( &angles.x , &rotMat[ 0 ].x );
|
|
dir = glm::vec3( 0 , 0 , -distance ) * rotMat;
|
|
up = glm::vec3( 0 , 1 , 0 ) * rotMat;
|
|
pos = lookAt - dir;
|
|
np = 2 * tan( M_PI * ( 180. - fov ) / 360. );
|
|
}
|