Esempi in C++ (Cpp) per Arcball::mouseOnSphere

Esempio n. 1

File: ArcballDemoApp.cpp Progetto: AKS2346/Cinder

// this draws with the sphere and axes to help undertand how arcball works
void ArcballDemoApp::drawVerbose()
{
	// draw the cube
	gl::pushModelView();
		gl::translate( getWindowCenter() );
		gl::scale( Vec3f( 200.0f, 200.0f, 200.0f ) );	
		gl::rotate( mArcball.getQuat() );
		gl::drawColorCube( Vec3f::zero(), Vec3f( 1, 1, 1 ) );
	gl::popModelView();

	// draw the back faces of the sphere
	gl::pushModelView();
		glColor4f( 0.0, 0.0, 0.0, 0.3f );
		gl::disableDepthWrite();
		gl::translate( getWindowCenter() );
		glCullFace( GL_FRONT );
		gl::drawSphere( Vec3f::zero(), mArcball.getRadius(), 50 );
	gl::popModelView();

	gl::enableDepthWrite();
	glCullFace( GL_BACK );

	// draw the axes
	gl::pushModelView();
		gl::translate( getWindowCenter() );
		
		// start
		glColor4f( 1.0, 1.0, 0.0f, 1.0f );
		gl::drawVector( Vec3f::zero(), mArcball.mouseOnSphere( mInitialMouseDown ) * mArcball.getRadius(), 10, 5 );
		
		// end
		glColor4f( 0.0, 1.0, 0.0f, 1.0f );
		gl::drawVector( Vec3f::zero(), mArcball.mouseOnSphere( mCurrentMouseDown ) * mArcball.getRadius(), 10, 5 );
		
		// constraint
		if( mUseConstraintAxis ) {
			glColor4f( 0.0, 0.7f, 1.0f, 1.0f );
			gl::drawVector( mConstraintAxis * -mArcball.getRadius() * 1.5, mConstraintAxis * mArcball.getRadius() * 1.5, 10, 5 );		
		}
	gl::popModelView();

	// draw the front faces of the sphere
	gl::pushModelView();
		glColor4f( 0.0, 0.0, 0.0, 0.3f );
		gl::translate( getWindowCenter() );
		gl::drawSphere( Vec3f::zero(), mArcball.getRadius(), 50 );
	gl::popModelView();	
}