Method draw

samples/CameraPersp/src/CameraPerspApp.cpp:186–263

}

void CameraPerspApp::draw()
{
	gl::clear( Color( 0.2, 0.2, 0.2 ) );
	gl::ScopedGlslProg shaderScp( gl::getStockShader( gl::ShaderDef().color() ) );

	gl::setMatrices( mViewCam );
	gl::viewport( getWindowWidth() / 2, 0.0f, getWindowWidth() / 2, getWindowHeight() );
	
	vec3 wTopLeft;
	vec3 wTopRight;
	vec3 wBottomLeft;
	vec3 wBottomRight;
	
	// Draw the far plane rect
	mObjectCam.getFarClipCoordinates( &wTopLeft, &wTopRight, &wBottomLeft, &wBottomRight );
	auto farPlane = gl::VertBatch( GL_TRIANGLE_STRIP );
	farPlane.color( ColorA ( 0.0f, 0.0f, 0.0f, 0.7f ) );
	farPlane.vertex( wTopLeft );
	farPlane.vertex( wBottomLeft );
	farPlane.vertex( wTopRight );
	farPlane.vertex( wBottomRight );
	farPlane.draw();
	
	// Draw a ray from the camera to the lookAt Point
	auto ray = gl::VertBatch( GL_LINES );
	ray.color( Color( 0.0f, 1.0f, 0.0f ) );
	ray.vertex( mEyePoint );
	ray.vertex( mLookAt );
	ray.draw();
	
	// Draw a ray from mouse to the far plane
	vec2 sTopLeft		= mObjectCam.worldToScreen( wTopLeft, getWindowWidth() / 2, getWindowHeight() );
	vec2 sBottomRight	= mObjectCam.worldToScreen( wBottomRight, getWindowWidth() / 2, getWindowHeight() );
	Rectf r				= Rectf( sTopLeft, sBottomRight );
	
	if ( r.contains( mLastMousePos ) ) {
		Ray clickRay = mObjectCam.generateRay( mLastMousePos, ivec2( getWindowWidth() / 2, getWindowHeight() ) );
		auto rayLine = gl::VertBatch( GL_LINES );
		rayLine.color( Color( 0.8f, 0.0f, 0.0f ) );
		rayLine.vertex( mEyePoint );
		rayLine.vertex( mEyePoint + clickRay.getDirection() * mObjectCam.getFarClip() );
		rayLine.draw();
	}

	// Draw camera frustrum
	gl::color( ColorA( 0.8f, 0.8f, 0.8f, 0.5f ) );
	gl::drawFrustum( mObjectCam );
	
	// Draw the object in the scene
	mObjectFbo->bindTexture();
	gl::color( Color( 1.0f, 1.0f, 1.0f ) );
	mObjects.at( mCurrObject )->draw();

	// Draw the near plane with projection
	gl::ScopedGlslProg shaderScp2( gl::getStockShader( gl::ShaderDef().texture().color() ) );
	mObjectCam.getNearClipCoordinates( &wTopLeft, &wTopRight, &wBottomLeft, &wBottomRight );
	mObjectFbo->bindTexture();